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| صيانة الفيديو والـ DVD و VCD و CD-ROM أصلاح اعطال الدي في دي و السيدي روم |
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Hitachi TV Model: C2133TN (Nokia Stereo Plus) Chassis) Very strong red content in the picture, sometimes the fault wod clear with the strong red content fading until the correct greyscale was achieved After much searching around i found the problem. There was a very small crack in the solder at RH23, this is a 2K4 surface mounted resistor located at the back of the tube base. Resoldering both sides of it cured the fault (Sparky) Jvc TV Model: C-V14EKS/B/W (Onwa Chassis) No Red I was hoping the nvm had become corrupt and turned the red drive down but it was fine (To enter service mode press and hold vol up and vol down on the front panel and switch set on). Thankfully ZD405 (8V2) had expired (almost s/c) and removed the red (Andy Doswell) Sanyo Video Model: VHR776E Dead Check and replace PR512 (which is located towards the front right hand side) (T.t.r.s. - Tim) Nikkai TV Model: BABY 10 No / int luminance Poor contacts within the service switch (John) Sony TV (AE1 Chassis) Field non linearity and short picture Check / replace C531 (680uF, 25v), only slightly leaky, but a new one cured the fault (Anonymous) Philips Video Model: VR200 Unit not working, no FL display, ticking from PSU, head drum twitching Electrolytic cap in PSU primary dried up (47uF, 50v) (Anonymous) Ideal/Slx TV Model: IDTV28T/IDTV28N/SLX28T2/28N (SM2 Chassis) EW fault then set went dead (tripping), R711 on EW panel burnt Check for dry joints on C620 (0.47uF, 250V), if dry replace then check Q602 and R618 (5K6). Also it is worth replacing Q580 anytime these sets come into the workshop with a BF422 (Leonard O'Brien) Philips TV Model: 25PT4423 (L6.2 Chassis) Stuck in standby, LED on, no HT There may be no 5V to the microprocessor. Check R3509 and D6501. Replace R3509 with a 47k 1 Watt version (4822 053 10473). D6501 is type BZX79B5V6 (4822 130 34173). Check the +150 volt rail, 145V is too low (Adel Ibrahim) Rca TV Model: F27442 (CTC203AD5 Chassis) No picture and sound, only a high pitch sound at switch on Remove horizontal transistor and measure the resistance across any two pins. This value should be no less than 200ohms (Roughtest) Sony TV Model: KV-M2131U (BE1 Chassis) Intermittent loss of syncronisation, both horizontal and vertical The surface mounted power transistor on the teletext module requires resoldering. As there is evidence of scorching on the board the use of a more substantial component would be indicated perhaps with small heatsink (Desmond Armstrong) Samsung TV Model: CZ-21D83NS Double picture or raster shifted Check R414 (15K) (Leonard) Sony TV Model: KV2565 Dead with H. output short circuit, replacment blows short again First check power area and repair dry joints then change all high voltage (PF value) capacitors in the horizontal section, this fixed the problem (Imran Khan) Mitsubishi TV Model: CT29B2STX Various faults, dead, int. dead, poor frame, poor E-W Change all electrolytic capacitors in the primary. Check all large electrolytics in the secondary (Ie bigger that 470uF), check all capacitors around IC950 (error amp.). Most capacitors you will find are leaking electrolyte. Might be a long job!!! (Andy Doswell) Sony Video Model: SLV-E800 No picture - screen is empty. Sound is ok Check IC101 (BA7630F), if video signal comes to input (pin 1) but not present at output (pin 14) then replace this IC (Raymundo) Panasonic Video Model: NVHD650B Fault code F80. works occassionally then doesnt work at all There is a plastic piece on the motor which rotates when you press play or eject. A plastic cap fits on the spindle of the motor. This slips and doesnt grip the motor hence does not turn the drive gears. Just glue or replace the part (use loctite or super glue) (Dal) Philips TV (A10 Chassis) Procedure to view customer service menu Press Mute button on handset and any button on the TV, hold for a few seconds and menu will appear (Joe) Ferguson Video Model: FV105HV Vcr dead, slow oscillation in p.s.u Replace CP007 and CP008 close to the U4614B (Found this tip posted under Thomson VPH6601 which seems to have the same PSU) (Anonymous) Philips TV Model: 32PW6526-05 (SA10E Chassis) Procedure to exit child lock with pin unknown / "locked" displayed on screen Switch set on, press menu, select feature and press enter, select parental lock and press enter, then enter the code 0, 7, 1, 1 twice, the lock should now have cleared (Josh) Fermendi TV (F19 Chassis) Procedure to invoke service mode I have used this method and it works (supplied from the makers manual). With tv off, hold volume up button on tv, switch tv on and keep holding volume up button whilst pressing standby on remote (this must be done within 4 secs of switch on) at no time let volume go, press the yellow memory button on the handset to store (Steve Taylor) Toshiba TV Model: 28W23B (11AK37 Chassis) Procedure to enter the service mode Press the menu button then 4,7,2,5 (Josh) Toshiba TV Model: 28W23B (11AK37 Chassis) Picture displaced vertically, picture too high or low This problem was cured by entering the service mode (menu then 4,7,2,5), then pressing the green fastext button to access geometry settings, selecting VP1 (vertical position) and adjusting as necessary (Josh) Sony TV (BE3D Chassis) Procedure to enter the service mode Press standby, i, 5, vol+ and tv (TT should now be displayed on the screen indicating the set is in the service mode) (Josh) Grundig TV (CUC7301/3 Chassis) Power supply blown This is often caused by a dry joint at C669 in the snubber network but also check the mains bridge rectifiers reservoir capacitor (47uF, 385v) for o/c, this item is not included in the ususal p.s.u repair kits and if not checked may result in a repeat blow up ! (Josh) Read more: http://www.qariya.com/vb/showthread....#ixzz0wy6hnax8 التعديل الأخير تم بواسطة : ABO KAMIL بتاريخ 28-03-2006 الساعة 12:25 PM |
| عطية حسن محمود |
| مشاهدة ملفه الشخصي |
| زيارة موقع عطية حسن محمود المفضل |
| البحث عن كافة المشاركات المكتوبة بواسطة عطية حسن محمود |
| اعلانات |
| عطية حسن محمود |
| مشاهدة ملفه الشخصي |
| زيارة موقع عطية حسن محمود المفضل |
| البحث عن كافة المشاركات المكتوبة بواسطة عطية حسن محمود |
| اعلانات اضافية ( قم بتسجيل الدخول لاخفائها ) | |
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Thomson TV (ICC17 Chassis)
Picture lacking in contrast and brightness The symptoms suggested a beam limiter fault, replacing transistor TL02 (BF422) which was found to be leaky produced excellent pictures (Kind Regards - LB) <HR align=left width="100%" SIZE=2> Philips TV (L6.2 Chassis) Power supply will not start up Resistor 3506 (0.33 Ohms, 1w fusible) had failed, a replacement brought the set to life (Kind Regards - LB) <HR align=left width="100%" SIZE=2> Schneider TV Model: TV9 Line output transistor short circuit Replacement did not clear the fault and the protection circuit was operating. C307 (0.047 F, 200V) was found to be o/c, when removed it had a bubble on the side, it's part of a potential divider network (C306 & C307 in series, centre of which goes to the protect circuit), it is hard to get to being right by the line output transistor(Kind Regards - LB) <HR align=left width="100%" SIZE=2> Beko TV Model: 14.2 The +Ub voltage (+140V) was not present, fault in switching power supply Transistor T601 (SK2545) had failed, replace/check resistor R602 (1Meg ohm) in switch control circuit, also if T601 is s/c the control chip TDA16846 will also be damaged (Gordon w.Cox) <HR align=left width="100%" SIZE=2> Sony TV Model: KV25K5U (FE1/FE1A Chassis) No sound or vision, front led flashing Replaced line output transistor, resoldered dry joints on driver transformer. Also check for any other poor joints in this section. Have used a 2SD1878 as replacement, This seems to work ok as the Sony original is very expensive (A. Gould) <HR align=left width="100%" SIZE=2> Sharp TV Model: 6GF63H (DA-50W Chassis) Noise from speakers / center speaker even with the volume set at minimum Replace IC1300 (BA4558F 8pin smd) and IC1302 (TDA7480) which are both located on the central speaker amplifier plug-in PCB (J.C.) <HR align=left width="100%" SIZE=2> Jvc Video Model: HRJ205 Dead, no negative voltages on psu connector Check R32 (100 ohms) in psu for o/c (Anonymous) <HR align=left width="100%" SIZE=2> Normanse Spectra TV Model: 5207 (F11 Chassis) Dead set, power supply ticking R164 was found to be open circuit (Anonymous) <HR align=left width="100%" SIZE=2> Decca TV Model: D28NT92S (PT92 Chassis) Dead set, no stby led Check RP06 (3.9meg), RP05 (1meg) and RP07 (15R) in psu (Anonymous) <HR align=left width="100%" SIZE=2> Sanyo TV Model: Spectra 2000 Picture had only wide screen effect Found set on the street ! beautiful little 14" tv, still looks like new, replaced 33uF, 160v cap in power circuit as it was bleeding its guts onto the pcb, has worked perfectly ever since ! (Ronyec Andras - <?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com ffice:smarttags" /><st1:City w:st="on"><st1 lace w:st="on">Montreal</st1 lace></st1:City>) <HR align=left width="100%" SIZE=2> Teac TV Model: CT-M685 (ONWA Chassis) Set stays in standby intermittantly or will int switch off to standby also brightness and contrast slightly low Resolder all joints in the power supply (very small dry joints that need a microscope to find !) also check / replace replace capacitors C109 and C110 and check condition of other psu caps. (Pappy) <HR align=left width="100%" SIZE=2> Panasonic Video Model: NVJ30 (G-Deck) Severe patterning of white streaks filling the screen in playback. E-E is ok C1122 in the power supply unit. It is probably leaking its contents (Rob Marshall) <HR align=left width="100%" SIZE=2> Panasonic Video Model: NV-366 Front buttons (Play, FF etc.) don't work Caused by faulty remote control jack socket - this machine uses a wired remote (Anonymous) <HR align=left width="100%" SIZE=2> Matsui TV Model: 1420T Dead set, P.S.U. not firing up Resistor R511 (1.8M) open circuit (Anonymous) <HR align=left width="100%" SIZE=2> Salora TV(J Chassis) Start up problems Replace CB712 and CB726 in the power supply. Both are same value (4.7uF, 50V) (Anonymous) <HR align=left width="100%" SIZE=2> Goldstar TV Model: 20A80 No picture, FR406 ok Check the video output amplifier stage for failure (Zubair Almas) <HR align=left width="100%" SIZE=2> Panasonic Video Model: NV870 (D1 Mechanism) Noisy FM audio Add a 0.01uF 50v ceramic capacitor between pin 9 of IC4509 and ground (only applies to units with serial numbers prior to D5K) (Anonymous) <HR align=left width="100%" SIZE=2> Panasonic Video Model: NV870 (D1 Mechanism) Mode switch chatters If it still does this with a new mode switch, check the serial number. If it's prior to numbers beginning A5K... then add a 560 ohm resistor and a 50v 0.68uF electrolytic capacitor in series, between pin 2 of IC6002 and ground. (Anonymous) <HR align=left width="100%" SIZE=2> Panasonic Video Model: NVF70 No sound via SCART socket Fit R4908 and R4910 on input/output pack, as they may be missing ! (Both 47 ohm) (Anonymous) <HR align=left width="100%" SIZE=2> Panasonic Video Model: NV730B (D1 Mechanism) Video heads wear very quickly Check the back tension if you haven't done so already - it was set too high when manufactured. (Anonymous) <HR align=left width="100%" SIZE=2> Sony TV Model: KV2020 Picture is folded over at the top and curled at the top left hand side Replace C559 and C560 (Anonymous) <HR align=left width="100%" SIZE=2> Sony TV Model: KV1412 Noisy picture Replace relay RY481 on S2 board (Nigel Burton) <HR align=left width="100%" SIZE=2> Sony TV Model: KV1412 Vertical line at the left of the picture Replace L506 on A board, replacement part number 1-407-366-00 (Nigel Burton) <HR align=left width="100%" SIZE=2> Sony TV Model: KV1412 Set reverts to standby mode when switched on, because IC003 does not reset correctly Replace IC003 on A board, IC type CX523013P (Nigel Burton) <HR align=left width="100%" SIZE=2> Medion TV Model: MD7103VTS (11AK18 Chassis) Power LED and Sound OK. EHT Voltage for 1 Second after switching on via Remote Control Replace vertical deflection circuit IC605 (TDA8361) - don´t forget to apply Heat transfer compound !! (Rainer) <HR align=left width="100%" SIZE=2> Sony TV Model: KV28WS3 (AE3 Chassis) No sound or picture, in protection after 2 seconds No 6.5 Volt on G-board. Fuse resistor PS605 is broken on G-board. Cause: bad contacts (Jan Post) <HR align=left width="100%" SIZE=2> Philips TV (ANUBIS A-AC Chassis) Low 95v rail, (35v) C2530 open circuit completely (P willis) <HR align=left width="100%" SIZE=2> Panasonic TV Model: TX28W3 (EURO 1 Chassis) At switch on a strange sound comes and goes for a few seconds, no sound and vision Check R622, Q624 and T639 (Anonymous) <HR align=left width="100%" SIZE=2> Grundig TV (CUC5310 Chassis) Dead, no shorts found Look for dry joints on the scan coil plug (may not be visable) also resolder the 12v and 5v regs (Anonymous) <HR align=left width="100%" SIZE=2> Sony TV Model: KV21GMR1 MkII No raster, flyback squeeking Check the damper diode, in my case it was leaky, also check the electrolytic capacitor connected from the collector of the pin out trans. (Rams-Dumaguete) <HR align=left width="100%" SIZE=2> Rca TV Model: F19220BK (CTC175L2 Chassis) Erratic screen / intermittent, eprom causes multiple possible symptoms, clicks on/off, tuner, you name it ! Mass defect caused by bad solder in tuner, once fixed will probably last forever. Resolder tuner wrap-around groundings and all pins under tuner shield (bottom), if no success suspect a corrupted eprom (Anonymous) <HR align=left width="100%" SIZE=2> Sony TV Model: KV20TS20 Snowy or intermittent picture, makes popping sound Solder all coils in stand up board and tuner (Anonymous) <HR align=left width="100%" SIZE=2> Philips TV (A10E Chassis) Randomly switching to scart input when the programme output from the tuner should be displayed This is now becoming a common problem, the cause being the painter chip IC7064 which is located on the small signals panel, there are 8 different versions but only 3 common versions (Anonymous) <HR align=left width="100%" SIZE=2> Schneider TV Model: DTV2 Shuts off after 20 minutes or so Dry joint on FBT (Chris Prestwich) <HR align=left width="100%" SIZE=2> Sony TV Model: KV-M21TU (AE1 Chassis) Intermittent rolling and loss of luminance, improves as set warms up Dry joints on tuner / IF board (Thunderdunc) <HR align=left width="100%" SIZE=2> Sony TV Model: KV-21FS100 (BA6 Chassis) No power, R640 open Change R640, IC600 and associated electrolytic capacitor (Iván Meléndez) <HR align=left width="100%" SIZE=2> Philips TV-Vid Combi Model: Televideo No vcr transport functions via remote This is the symptom when the remote control has switched from the correct VCR1 mode to the VCR2 mode (usually due to low battery voltage or the batteries being replaced), to rectify the situation hold both the stop button and button 1 together for 5 seconds, alternatively for different remote versions holding the stop button and button 2 together for 5 seconds will rectify the problem (Josh) <HR align=left width="100%" SIZE=2> Toshiba TV Model: CF3060K Problems with screen size Look out for 2 x 2.2uF electrolytics (sometimes red in color) (Anonymous) <HR align=left width="100%" SIZE=2> Daewoo TV-Vid Combi Model: DVT-1482P (CP310 Chassis) Totally dead except for a few rapid flashes from the green led at switch on C811 a 100uF, 16v capacitor in the power supply was the cause, it is located next to the chopper transistor's heatsink. This is the same TV/Video as the Goodmans TVC14VP (Rob Marshall) <HR align=left width="100%" SIZE=2> Panasonic Video Model: NV-HD675 (Z-Mech Chassis) Intermittently shutting down with HO1 in display Problem can be caused by stator board VEK9017 but in this case the problem was the upper drum assy! The bearings seize up when warm! (E.T. Sandy) <HR align=left width="100%" SIZE=2> التعديل الأخير تم بواسطة : ABO KAMIL بتاريخ 28-03-2006 الساعة 12:27 PM |
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Sanyo TV Model: CEP3011V-30 (A1-B14 Chassis)
After switching on, no longer able to switch-off with remote control, standby light comes on with sound muted. (Original remote control: RM-700) Opto-coupler PC113 faulty (Esohe) <HR align=left width="100%" SIZE=2> Ge TV Model: PTK195AA (PTK195 Chassis) Works fine for 10 or 15 min. (or sometimes 1 or 2 days) then bows from top and loses convergence Replace the STK730-130, located on small board above the convergence module (Clonch tv) <HR align=left width="100%" SIZE=2> Lenco TV Model: 14P1MNA Standby only Check R101 (4.7ohm), TR102 (C6180) and C126 (47uF, 16V) (Akalipt) <HR align=left width="100%" SIZE=2> Sony TV Model: KV-M1400 (BE2A Chassis) Insuficient vertical deflection. Line rolling on top of picture Replace ceramic capacitor C524 (Pm) <HR align=left width="100%" SIZE=2> Tandberg / Seleco / Sinudyne TV Model: 3TS645 (PC170 Chassis) No vertical scan, just one bright line in the middle Suspect R235 (18kohm), in some cases the TDA3654 may also have failed (Jonnykvist) <HR align=left width="100%" SIZE=2> Grundig TV Model: M70-490/9 TEXT (CUC3800 Chassis) No sound, picture ok When shifting up the channel frequency using the fine tuning, a very weak sound could be heard. Replaced the sound IF demodulator chip U2829B(IC2110) (Rui Loureiro - <?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com ffice:smarttags" /><st1 lace w:st="on">Portugal</st1 lace></st1:country-region>) <HR align=left width="100%" SIZE=2> Sanyo TV Model: CEP2190M No sound IC901 (TDA4935) blown due to excessive supply voltage, capacitors C619, C623, C810, C600, C601, C859 defective. Also verify R822 (Jeroni Paul) <HR align=left width="100%" SIZE=2> Jvc TV Model: AV25S1EK Field collapse Resolder TDA3654 as joints appear good but on application of soldering iron show to be dry (Pj) <HR align=left width="100%" SIZE=2> Mitsubishi TV Model: CS40503 Sometimes will not power up, missing 15 volt standby Replaced D982 and C982, both leaky (Kami) <HR align=left width="100%" SIZE=2> Sony TV Model: KV24FS100 Will not power, led blinking check R640 (1K 1/4w) if open replace ic600 (8-759-670-30) (Kami) <HR align=left width="100%" SIZE=2> Schneider TV Model: STV630UK Only half a screen of frame scan Replace IC401 (TDA8177F). If any blanking problems occur after chip replacement, check R327 (1ohm) next to IC401 (Anonymous) <HR align=left width="100%" SIZE=2> Sharp TV Model: DV6632H (4BS-C Chassis) Led changes from green to red, fails to start up, no EHT but secondary voltages in psu ok (150V ok) Check Q601 and Q606, these are Q600 LOPT drivers, there should be 2V P-P on base of Q606 and 150V on collector of Q601, replace Q606 with a BC182 (check pinout) (Steve May) <HR align=left width="100%" SIZE=2> Matsui TV Model: 25M3 Failure to start up, led pulses Check for dry joints on R541 and D436 located next to L.O.P.T (Niall) <HR align=left width="100%" SIZE=2> Proline TV Model: 28N1 (F19 Chassis) Procedure to invoke service mode I have used this method and it works (supplied from the makers manual). With tv off, hold vol up button on tv, switch tv on and keep holding vol up button whilst pressing standby on remote (this must be done within 4 secs of switch on) at no time let vol go (Steve Taylor) <HR align=left width="100%" SIZE=2> Sharp TV Model: DV7045SN No vertical deflection R615 open (0.13 ohm 1/2W). Also resoldered many bad solder joints (Jeroni Paul) <HR align=left width="100%" SIZE=2> Jvc Video Model: HRD750 Tracking does not lock. Picture runs up and down occasionally (Very) Small electrolytic caps on the drum circuit board must changed (They may be the bigger can type, if you don't find small ones) (Lassi Uuu) <HR align=left width="100%" SIZE=2> Toshiba TV Model: 175T9B Line tearing and incorrect field lock when cold 47uF electrolytic AGC decoupling capacitor inside tuner/if unit (Colin <st1:City w:st="on"><st1 lace w:st="on">fairfield</st1 lace></st1:City> tv) <HR align=left width="100%" SIZE=2> Philips TV-Vid Combi Model: 14TVCR240 Poor tape transport, tape is crumpled, upper or lower side gets rippled Replace the capstan roller, if the tape transport is still not smooth check the guidepole (between the audio/control head and the capstan), tape must touch border-ring. Adjust the audio head position (screws marked A and T) (Anonymous) <HR align=left width="100%" SIZE=2> التعديل الأخير تم بواسطة : ABO KAMIL بتاريخ 28-03-2006 الساعة 12:56 PM |
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Bluesky TV Model: TDX-70 (11AK19 Chassis)
HT low / missing Q608 (BU2508) dead (short-circuited). Needed replacement. That's all... (Anonymous) <HR align=left width="100%" SIZE=2> Panasonic TV Model: TC2195DRS (Z3T Chassis) SMPS noise. Low volt and high current on Usyst, no screen or sound FBT TLF15606F (Anonymous) <HR align=left width="100%" SIZE=2> Irradio TV Model: MC-FBC-006 Dead, i.c. oscillating (may start if i.c. heated) Check / replace R602 (2.2M, 1/2w) (Anonymous) <HR align=left width="100%" SIZE=2> Sony TV (FE-1 Chassis) Procedure to return EEPROM to factory default settings Select programme 59, enter the service mode and at the TT-- prompt enter 49 then 24 (for UK)and 08 then switch off at the mains (Anonymous) <HR align=left width="100%" SIZE=2> Sony TV (FE-1 Chassis) Main p.s.u starts up then almost immediately shuts down This was due to IC603 (SE135N) being faulty (Josh) <HR align=left width="100%" SIZE=2> Sony TV Model: KV-E2543E Set goes to V protection mode (led flashes 13 times) Check if there is saw signal at STV8379. If there is no signal, suspect dj in connector links between both motherboards, especialy the one very close to plastic frame (Jose Carlos Pinto - <?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com ffice:smarttags" /><st1:City w:st="on"><st1 lace w:st="on">Oporto</st1 lace></st1:City>) <HR align=left width="100%" SIZE=2> Toshiba TV Model: 2505DB Stretched frame or frame collapse Replace modification diode 570 on copper side (Anonymous) <HR align=left width="100%" SIZE=2> Hitachi TV Model: C2846TN (311 Chassis) Frame collapse or dotted line Check and replace frame ic (TA8427K) or check R710 for open circuit, also check for possible dry joints on D601 (Jimmy n) <HR align=left width="100%" SIZE=2> Sony TV Model: KV-A2923 Set starts, horizontal and vertical deflection work, HT ok, crt heaters ok, but no sound or picture I turned the G2 voltage up and noticed a white screen with flyback lines, frame ok. I detected two badly soldered double diode rectifiers in the secondary part of the power supply ! I checked all other joints, and everything was ok !! success (Anonymous) <HR align=left width="100%" SIZE=2> <st1:City w:st="on"><st1 lace w:st="on">Hitachi</st1 lace></st1:City> TV Model: C1714TFrame collapse, causing set to go dead, also can cause the regulator transistor, to go s/c. BUT12AF. H.T. unstable Check R951 (39K) goes high, in this case 65K, causing HT to go high (G3xxr) <HR align=left width="100%" SIZE=2> Philips TV (GR2.1 AA Chassis) Poor picture quality from CVBS EXT1 and EXT3. Low intensity high saturation. Loss of sync. Shock and temp dependent Dry joints on SMD resistors 3014 and 3019 on IF/Sound module other side of encapsulated TDA2549 (Choc's maker.) <HR align=left width="100%" SIZE=2> Sony TV Model: KV-A2923 Standby led blinks slowly, a few times, chassis won't start up I changed the vertical deflection ic type TDA8170 and I measured two leaky capacitors in the power supply. Better to change all 4 capacitors in the power unit, everything was then ok ! (Anonymous) <HR align=left width="100%" SIZE=2> Sony TV Model: KV21M1D Picture disapears a moment after changing program. Raster/OSD ok Replace TDA9806 ic (Apostol) <HR align=left width="100%" SIZE=2> Goldstar TV Model: CBT-9745 (PC91A Chassis) Attempts to start up. When main switch is pushed ON, relay coupling and decoupling (on-off, on-off) Replace: C805 (47uF, 50V) next to the TDA4605 and C801 (1uF, 50V) (Zoran) <HR align=left width="100%" SIZE=2> Goldstar TV Model: CBT-9745 (PC91A Chassis) TV dead. PSU ok, led lit. When button pushed on remote the LED goes out but set does not start (Missing HF voltage) Replace: C417 (1uF, 250V) Elko for HF oscill. (next to HF trafo) (Zoran) <HR align=left width="100%" SIZE=2> Philips TV (FL1.1AA Chassis) Int shutdown with lights flashing Check the 18v zener D6376 (Anonymous) <HR align=left width="100%" SIZE=2> Philips TV Model: 20PV164-05 Vertical frame collapse Change vertical output drive IC and nearby electrolytic capacitor (Bugtom) <HR align=left width="100%" SIZE=2> Nokia TV (FX Chassis) Left part of picture missing after fitting vertical modification kit Make sure you have fitted the extra capacitor between pins 8 and 9, instead of 10 and 9. Fitting incorrectly will destroy the sandcastle pulse and make the picture appear strange (<st1 lace w:st="on"><st1:City w:st="on">Kalle Birgersson</st1:City>, <st1:country-region w:st="on">Sweden</st1:country-region></st1 lace>) <HR align=left width="100%" SIZE=2> Nei TV (CE25 Chassis) Dead - PSU clicking Dry joints on D116 and C131 causing blown BU508A (Andy Fraser) <HR align=left width="100%" SIZE=2> Grundig TV (CUC5310 Chassis) Picture int disappears leaving snow on screen Resolder the Xtal in the tuner (<st1 lace w:st="on"><st1:City w:st="on">Kalle Birgersson</st1:City>, <st1:country-region w:st="on">Sweden</st1:country-region></st1 lace>) <HR align=left width="100%" SIZE=2> التعديل الأخير تم بواسطة : ABO KAMIL بتاريخ 28-03-2006 الساعة 12:58 PM |
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Schneider TV Model: STV630UK
Frame Collapse Replace IC401 (TDA8177F) and resistors R325, R326, R327 (Jim Ross) <HR align=left width="100%" SIZE=2> Matsui TV-Vid Combi Model: TVR185 Int sound Check voltage on sound IC, if it drops with high volume change C620 (1000uF, 25 vdc) (Arl) <HR align=left width="100%" SIZE=2> Sharp TV Model: 66GF-63H Blank grey raster with flyback lines,sound present and ok Check pin 2 on connector H on tube base for 12V if high then check Q912 (BC337) for o/c (David Mclellan) <HR align=left width="100%" SIZE=2> Sony TV Model: KF60XBR800 No picture no sound timer light flash 44 fast 45 then 5 times then 5 times Replace power block part # 1-468-510-11 (Mervin) <HR align=left width="100%" SIZE=2> Toshiba TV Model: 198X6M Horizontal output continues to short Check capacitors C403 and C408 (both 50v) these two caps tend to change capacitance (Aze - <?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com ffice:smarttags" /><st1:country-region w:st="on"><st1 lace w:st="on">Philippines</st1 lace></st1:country-region>) <HR align=left width="100%" SIZE=2> Philips TV Model: 28PW6005 (A10 Chassis) Changes to ext 1 when watching tv (ok with video input) Painter ic IC7064 failed on the ssb (small signals board) (Anonymous) <HR align=left width="100%" SIZE=2> Philips Video Model: Turbo Deck Chews tapes and poor tracking Fit new pinch roller (Cee dees) <HR align=left width="100%" SIZE=2> Thomson TV Model: RP46 East-west and north-south bowing. Really bad convergence The extra power supply is not working. Check R18 on primary side. It should read 220Kohm (<st1 lace w:st="on"><st1:City w:st="on">Kalle</st1:City>, <st1:country-region w:st="on">Sweden</st1:country-region></st1 lace>) <HR align=left width="100%" SIZE=2> B and O TV Model: LX5500 Sound disappears from time to time If there is sound all the time via scart, but problem with both mono and stereo via tuner, check R137. It is a 4k7 pot on the tuner board (<st1 lace w:st="on"><st1:City w:st="on">Kalle</st1:City>, <st1:country-region w:st="on">Sweden</st1:country-region></st1 lace>) <HR align=left width="100%" SIZE=2> Rca TV Model: F27442 (CTC203AD5 Chassis) No power, all standby voltages ok Replace the guide plus. is located to the side of the tuner (Fher) <HR align=left width="100%" SIZE=2> Philips Video Model: VR678 Reel brakes not operating Due to broken plastic pivot for pulse slider (item 110) mounted on chassis (does not look like replacement part but wve stock holder, pulse mech kit Pt no. 16256HL) (Anonymous) <HR align=left width="100%" SIZE=2> Bush TV Model: 2071NTX (11AK19 Chassis) Black screen from tuner but OSD (menus and channel no.), teletext and sound work normally Q500 and Q504 blown, replacement cured fault. Removing R508 also restored picture. Fault puts TDA8840 in RGB insertion mode continuously, so separated RGB input might still work (Joe Kelleher) <HR align=left width="100%" SIZE=2> Magnavox TV Model: RP2781 C101 (27X105-00AA Chassis) No vertical deflection If resistor R445 (1ohm) has gone open circuit this may cause IC550 (LA783x) to also fail. Replaced both IC550 and R445 (Daniel) <HR align=left width="100%" SIZE=2> Sony TV (FE-1 Chassis) Procedure to display past error codes and the number of times they have occured (particulary useful for ongoing intermittent faults) Enter the standby mode then press the on-screen display button (i+), 5, volume down, and finally the tv button. Note: the error count can be reset by pressing 8 then 0 on the remote control (Josh) <HR align=left width="100%" SIZE=2> Sony TV (FE-1 Chassis) Intermittently displays bright red/green/blue raster then shuts down with led flashing 2, 4 or 5 times Amazingly this was due to the CRT being faulty ! (Josh) <HR align=left width="100%" SIZE=2> Philips TV Model: 33SL5796/16B (FL 1.0 Chassis) Snowy picture specially in VHF band. After about 5 minutes, picture snowy in all bands. About 10 minutes after switching on, no picture nor sound, just snow on the screen Replaced the TUNER/IF. Original code was FQ816ME which is no longer in production. Replacement code is FQ916DME (Rui Loureiro - <st1:country-region w:st="on"><st1 lace w:st="on">Portugal</st1 lace></st1:country-region>) <HR align=left width="100%" SIZE=2> Sony TV Model: KV-21RXR1 Excessive brightness/ brightness control reverses its function When setting brightness to minimum the pic became very bright, setting to maximum the picture became dark ! Found that R301 (270k ohms) near the jungle IC was o/c (Aze) <HR align=left width="100%" SIZE=2> Philips Video Model: VR6448 (20921 Chassis) Mechanism jammed, some posts hard to turn Grease has turned into cement!! Oil most of the moving parts, and move them to ensure oil penetrates (Anonymous) <HR align=left width="100%" SIZE=2> Universum TV (11AK19 Chassis) Narrow Picture After resoldering joints in the line output stage, check R629 (27ohms, 1/2w) safety resistor to E/W FET, also o/c capacitor C630 (0.47, 250volts). According to the schematic R629 is 2.7 ohms (Conrad626) <HR align=left width="100%" SIZE=2> Philips TV Model: 14PV220 (EPSILON 2001 Chassis) Dead (Totally) SMPS Chopper IC 7310 (MC44608 P75). I had no output from pin 5 with start up voltage pin 8 OK at 290V. If start up missing check start up resistor 3335 (1K). The only source I found for IC 7310 was Philips direct, part number 9322-143-51682, cost ~ £10 (Paul van gelder) <HR align=left width="100%" SIZE=2> Philips TV Model: 21GR2751 (G90B Chassis) Stereo set with no sound off air, maximum volume produces low hiss, some sound possible if station is detuned slightly. Sound via SCART is ok Replace IC U2829B on audion panel (Bill) <HR align=left width="100%" SIZE=2> Nordmende TV Model: GALAXY 55 (ICC8 Chassis) Dull picture Replace (TT33) on tube base (B goan) <HR align=left width="100%" SIZE=2> Nordmende TV Model: GALAXY 55 (ICC8 Chassis) Not tuning into channel 33v missing (RH040) o/c (B goan) <HR align=left width="100%" SIZE=2> Telefunken TV Model: PALCOLOR F531 (ICC9 Chassis) Stand-by led flash but set does not start Replace: TL19 (BUH517), DL21 and DL22, CL21 and CL22 (Anonymous) <HR align=left width="100%" SIZE=2> التعديل الأخير تم بواسطة : ABO KAMIL بتاريخ 28-03-2006 الساعة 01:02 PM |
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Orion TV Model: TV2501B
Dead set or will start up and shut down IRD shorted or leaky (Clonch tv) <HR align=left width="100%" SIZE=2> Sony TV Model: KV2062 Dark picture, No brightness control 1000V+ Missing caused by open circuit IK resistor Near to FBT (Imran Khan) <HR align=left width="100%" SIZE=2> Sony TV Model: KVFX29 (FX Chassis) White horizontal line (no vertical deflection) Check / replace R548, R549 (Fabio) <HR align=left width="100%" SIZE=2> Goldstar TV Model: CB20A86 Dead, F801 blown Check short circuit PTC coil (Degauss) short Diode on main Cap+ Check for failure of regulator IC801 (STR5707), Also check H.output D1651 for short circuit (Imran Khan) <HR align=left width="100%" SIZE=2> Toshiba TV Model: 32ZD09G (C00S Chassis) Procedure to enter the service mode Press the mute key on the handset once, then press the mute key for a second time but hold it down while also pressing the menu button on the set (Josh) <HR align=left width="100%" SIZE=2> Schaub Lorenz TV Model: DS2 (DTV2 Chassis) Procedure to enter service mode Press and hold service button on PCB inside TV. Press `C` on remote. Press program no. where your test picture is, You are now in service mode (Anonymous) <HR align=left width="100%" SIZE=2> Akai Video Model: VSG2DPL Tape loading carrage is very loose and sloppy will not load and eject tape properly Mode switch is faulty, out of alignment or has a bad connection back to the PCB. This switch is located underneath the tape drive mechanism (Anonymous) <HR align=left width="100%" SIZE=2> Samsung TV Model: CB7230WT Power supply flutters and standby light dims out Replace mains filter capacitor (220uF 400v), also make sure the 4 capacitors in the primary are replaced (if they havent already been) (Anonymous) <HR align=left width="100%" SIZE=2> Samsung TV Model: CB7230WT Vertical failure (common fault) The reason for the failure is because the yoke is low impedance. The TDA3654Q i.c. has been designed to handle 12 ohms and over. Heat is the reason it destroys itself, the best cure is to place a small cpu fan on the heatsink (Anonymous) <HR align=left width="100%" SIZE=2> Philips TV Model: 29FL1770 or 25FL1760 (FL1.0 Chassis) After replacing the line output transformer, the following sympton was displayed. Display flashing standby light and stereo II Short s23 and s24 briefly, which will put the set into service mode. Option 1 should read 010 this applies only to the 25FL and 29FL. Option 2 should be 001 for sets with text and 004 for sets without text (John Carey) <HR align=left width="100%" SIZE=2> Jvc TV Model: AV28WZ2 Blank raster Replace defective TDA6111Q for Red, Blue and green (Rens van der enden) <HR align=left width="100%" SIZE=2> Thomson TV Model: 28VK-44E No start-up when cold, warm OK Changes CP198 (47uF, 16v). Secondary Power supply (Rens van der enden) <HR align=left width="100%" SIZE=2> Philips TV Model: 14PV184 Dead set / blown fuse Replace D6313, 6314, 6315, 6316 and R3337 (2R, 5W) (Skyprobe) <HR align=left width="100%" SIZE=2> Panasonic TV Model: TX21AD2DP Stuck in standby but tripping, not the usual nvm problem and nothing s/c Check and replace C804 (1uF, 25V), C806, C807 (100uF/50V) in supply. Use 105 degrees cap. types (Rob's TV-service - <?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com ffice:smarttags" /><st1:City w:st="on"><st1 lace w:st="on">Holland</st1 lace></st1:City>) <HR align=left width="100%" SIZE=2> Philips TV Model: 25FL1760 (FL1 Chassis) Set tries to go to stereo as indicated by the on screen display, but most of the time it is stuck in mono, when in stereo the right channel was hissing Replace the TDA8415 on the stereo decoder board, confirm this buy putting multimeter on pin 7 and 8, they should have a voltage of 3.2 volts (Cannny) <HR align=left width="100%" SIZE=2> Philips TV Model: 29FL1770 or 25FL1760 (FL1 Chassis) No pictures or sound Disconnect the P1 and P2 plugs on the right hand side board. L.o.p.t. side. If the set now starts up then change all sound output IC's (Cannny) <HR align=left width="100%" SIZE=2> Philips TV Model: 29FL1770 or 25FL1760 (FL1 Chassis) When selecting a channel it locks in initially but will then go off tune (as if the voltage tuning had varied) Replaced the TDA i.c. in the tuner i.f. section. (tried the capacitors first of course). (Cannny) <HR align=left width="100%" SIZE=2> Philips TV Model: 29FL1770 or 25FL1760 (FL1.0 Chassis) Lights flashing at the front, if carefully interpreted they point to the primary of the power supply Replaced 2SB 3795B chopper transistor, heated the heatsink with a hair dryer and it started right up, weird as the transistor was reading fine (Cannny) <HR align=left width="100%" SIZE=2> Decca TV Model: D20RDE6 (D Series Chassis) No luminance(looks negative picture) We spent over 2 hours on this set and in the end we swapped the chassis with a scrap chassis and the fault remained ! It turned out the fault was with the CRT (Anonymous) <HR align=left width="100%" SIZE=2> Samsung TV Model: 20A5 Partial field collapse Check IC301 (TDA8350Q) and the 2 associated unmarked capacitors (10uF and 100uF, 63v) and the 10ohms,5w ceramic resistor across pins 3/5 of the above chip (Anonymous) <HR align=left width="100%" SIZE=2> <st1:City w:st="on"><st1 lace w:st="on">Sylvania</st1 lace></st1:City> TV Model: SRT2127STTV will not start up, fuses ok Change IC601 (Paul Niswanger) <HR align=left width="100%" SIZE=2> Panasonic Video Model: NVJ45 (G DECK Chassis) Appeared to be dead (like C1110 1uF, 400) Found C1125 and C1130 (680uF, 20v) leaking onto pcb. Remove sm.tx and clean board (E.t.sandy) <HR align=left width="100%" SIZE=2> Orion TV Model: TV2501B Dead set Found the IRD shorted (Anonymous) <HR align=left width="100%" SIZE=2> Telefunken TV Model: Palcolor S540C (ICC9 Chassis) Geen blauwe kleur SMD transistor TV81 (Bc858) defect. (Anonymous) <HR align=left width="100%" SIZE=2> التعديل الأخير تم بواسطة : ABO KAMIL بتاريخ 28-03-2006 الساعة 01:10 PM |
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Blaupunkt TV Model: MS70-79VT (FM500-70 Chassis)
Horizontale gekartelde stoorpatronen in 't beeld 't eerste uur. Cond. C542 slecht (Digneffe Roger) <HR align=left width="100%" SIZE=2> Samsung TV/Video Combi Model: VM3105 No video, no audio. High pitch sound from power supply. Replaced blown fuseable resistor R417 (1 ohm, 1/2 watt) (Angel Torres) <HR align=left width="100%" SIZE=2> Bush TV Model: WS6690D (11AK19 Chassis) At switch on front l.e.d turns green, blinks twice then set returns to standby. All h.t voltages rise, then fall away as set goes into standby 33 ohm resistor feeding standby 5V reg was high (8 ohms - not shown cct diagram), in my case D605 on the 45 volt supply from the LOPT was faulty, although it measured o.k (Supadan) <HR align=left width="100%" SIZE=2> Thomson TV (TX807 Chassis) Plain raster, retrace lines, no sound Problem in vif board, Resistor 68 ohms to +b supply line 12V (Guruji) <HR align=left width="100%" SIZE=2> <?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com ffice:smarttags" /><st1 lace w:st="on"><st1:City w:st="on">Ferguson</st1:City></st1 lace> TV Model: 626R (TX807 Chassis)(H)VTU Tension de sintonia 99v pero en el zener DH01 (ZTK33A) hay 22v. Sustituir zener 33v (ZTK33A) (Eisi) <HR align=left width="100%" SIZE=2> Hitachi TV Model: C2146TN Dead / int, led lit Check the 5v regulator IC952, 8v regulator IC951, standby regulator IC950 and the field output chip (TA8427K) or for dry joints on the regulators (Anonymous) <HR align=left width="100%" SIZE=2> Nordmende TV Model: F20-9 (ICC7 Chassis) No colour Check IV01 (TA8659) or IE50 (TEA2114) (Anonymous) <HR align=left width="100%" SIZE=2> Goodmans TV Model: 2029T Blank raster with no sound (eht & tube heaters present) ZD401 s/c. Also take a look at R419. This set had been left on and R419 had cooked, it's value went to 20K (Terry) <HR align=left width="100%" SIZE=2> Sony TV Model: KVG25M1 Dead Found Q802 (C4927) short, replace with same type as no other types last (Seles) <HR align=left width="100%" SIZE=2> Panasonic TV Model: TX-2470 Cogging on vertical elements of picture, p.s.u squealing Replaced C808 (10uF, 50V) It had gone low in value (David Roberts) <HR align=left width="100%" SIZE=2> Panasonic TV Model: TX21V1 (Alpha 2 Chassis) Bright red raster with flyback lines,shutting down after about 30 seconds with squealing from power supply The fault was due to the supply choke to the red output stage on the tube base panel being O/C, I can only assume the shut down was due to excessive beam current, a long soak test proved all was now ok (Thunderdunc) <HR align=left width="100%" SIZE=2> Philips TV Model: 20PT3742 Dead with LED blinking 4 times The vertical output IC. is short circuit (Imran) <HR align=left width="100%" SIZE=2> Panasonic Video Model: NVG30 Operates for about half hour to an hour and shuts down Capstan IC located on the underside of main PCB was dry jointed due to exessive heat. Remove and discard plastic cover and apply fresh solder removing old. Also refresh heatsink compound.(I'll try extending the heatsink too) (Farouk) <HR align=left width="100%" SIZE=2> <st1:City w:st="on"><st1 lace w:st="on">Ferguson</st1 lace></st1:City> TV Model: M8422U (ICC17 Chassis)LED flashes once the 6 times then goes to standby Replace LOPT (Gordon ) <HR align=left width="100%" SIZE=2> Philips TV (L6.3 Chassis) Failure of fusible resistors R3929 and R3930 (both 560R) Unfortunately when these blow it is a sure symptom of LOPTX failure. When replacing these resistors, check the big blue 470nF, 250V capacitor behind them for signs of heat damage and replace if necessary, to avoid a recall (With resistors gone again!) (Rob Hancock) <HR align=left width="100%" SIZE=2> Aiwa TV Model: VXT1400 When switching to STBY raster remains and buzz noise is heared from the speakers Cause: +B voltage (103 V) does not switch-off. Remedy: Replace defective C541 (Vitaly) <HR align=left width="100%" SIZE=2> Schneider TV Model: STV515 No sound, no picture (dark screen) This was due to IC101 (VCU2133) (Anonymous) <HR align=left width="100%" SIZE=2> Akai TV Model: TV2034 Appears to be stuck in standby with the front led flashing and the h.t. at about half the correct voltage This set led me a merry dance until i discovered the set was actually in the child lock mode !! The problem was solved once this was disabled using the remote control (Josh) <HR align=left width="100%" SIZE=2> Sharp TV Model: 51DT-25H NVM modification / symptoms such as no video, tuning drift & reduced height from cold Fit 2 zener diodes (part no. RH-EX0404BM22) in positions D510 and D511, fit coil (part no. VP-CF120K0000) in place of link J122 and fit zener diode (part no. RH-EX0412BMZZ) in position D403 (Josh) التعديل الأخير تم بواسطة : ABO KAMIL بتاريخ 28-03-2006 الساعة 01:14 PM |
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