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:: عضو ذهبي و مشرف سابق لورشة صيانة التلفزيون ::
تاريخ التسجيل: Aug 2005
المشاركات: 1,073
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نشاط [ عطية حسن محمود ]
قوة السمعة:119
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28-03-2006, 09:27 AM
المشاركة 23
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Mitsubishi TV Model: CT29B2STX
Line output transistor s/c, repeated failure
Replace the four caps in the power supply C905 (470uF, 35V), C906 (470uF, 50V), C909 (2.2uF, 50V) and C920 (100uF, 25V) also note transistor varies with different size c.r.t.
(Steve b)
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Toshiba TV Model: 217D98
Severe field distortion
Check capacitor C317 (2.2uF, 50V) in linearity feedback circuit
(Steve b)
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Aiko / Perdio TV Model: 512
Excessive brightness with flybacks
Check capacitor C120 (2uF, 250V) in first anode supply
(Steve b)
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Philips Video Model: VR722 (LUCY Chassis)
LSM-45 power supply faulty after power failure
Replaced elco 2112 (100F, 385V) and capacitor 2116 (100nF, 400V). See also my tip about the philips VR-723 (Cooling down during power outtage). Cheers
(Leo hulstein)
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Philips Video Model: VR723 (LUCY Chassis)
Power supply LSM-45 would not start up after power failure
Cooling down of the machine during the power outtage triggered the problem: inside the supply module excessive heat is present that causes components to age rapidly, especially those that are located close to the heatsink. Replaced cap. 2116 (100nF, 400V)
(Leo hulstein)
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Sony TV Model: KV27EXR25
No raster, the set will click on but no high voltage
Replaced IC651 (on the power board) type STRS6301 (Note: Use an original STRS6301, not an STRS6301A unless the 6301A comes from SONY) This part does run very hot
(Billy sean)
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Philips TV Model: 27CE4599-33R (2A Chassis)
No sound, with sound at maximum you can hear a weak noise
Change IC7102 (U2830B if found, if not U2829B), this IC is located on the sound demod pcb
(Leffe)
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Salora TV (M Chassis)
Procedure to enter service mode
Press P then * then 0/AV then # then >M
* and # (change function)
Vol+ and Vol- (change value)
>M (store current value)
TV (exit service mode)
1..7 and . (bytes option)
(Salex)
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Samsung TV Model: CB5035Z
Stuck in osd mode, no functions
Change the eprom, check that the earthing of the green cable running from tuner is OK
(Leffe)
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Jvc Video Model: HRD720
Noise bar in playback, looks like error in the guides adjustment
The problem is the 3.3uf capacitor in the drum motor. This generates Pg signal errors. Replace it and give me a smile !
(Walter Rimini)
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ffice:smarttags" /><ST1lace w:st="on">lace> (TX92 Chassis)
After replacing the line output TX the set still appears to be tripping
Try switching the set on with the remote control. The micro seems to remember the tripping state, the remote control re-setting it
(Anonymous)
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Toshiba Video Model: V709B (Samsung Chassis)
Very slow rewind / fast forward
Center Gear assy u/s, cracks and drags on chassis, same will apply to Samsung and some Sony machines etc
(Nigel, Trident audio visual)
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Goodmans TV Model: W322NS
Procedure to enter sevice mode
Switch off tv, hold in VOL+ button on tv and STANDBY button on remote, switch back on at mains switch then release buttons, set will then come on in service mode
Adjust with PROG. + - and VOL + - store with yellow button
(Nigel, Trident audio visual)
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Sanyo TV Model: CE28WN4B
Procedure to disable protection mode for fault finding
The protection mode can temporarily be disabled to prevent the set going into standby during fault finding by disconnecting R648 (note: safety procedures must be followed !!)
(Josh)
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Grundig TV Model: M70-1690 (CUC6369 Chassis)
Dead, SI621 (1.6amp) blown apart
Replace SI621 (1.6A), SI601 (2.5A), D620 (B380 C2000/1500) REC, T644 (IRFBC40) mosfet, IC631 (TDA4605-3), C633 (100uF,25v), this was caused by dry joints on C648
(Anonymous)
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Itt TV (Comp De 110 Chassis)
Does not start when cold, simply produces a very fast trrrr noise...
Increased value of C711 (10uF, 63V) by adding a 4.7 uF in parallel on the bottom side of the printed circuit board
(Vusu)
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Daewoo TV-Video Combi Model: GB14F7T1
Smoke came out of vents, then shut down
Small pin hole in line output transformer type FSA36012M
(Peter Evans)
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Telefunken TV Model: S5400DMD (ICC10 Chassis)
At switch on the Led Blinks 3 times, supply tries to come up with a Tick-Tick sound. After trying 4 times to come up it goes to error standby with Led blinking very fast. Error code 3
Make sure primary side of power supply is ok by desoldering jumper JL26, connect Pin 3 of IL01 (protection) to pin 4 ground. Bypass DP127. Put 100W/230V lamp on usys. Turn on the set the lamp should glow and pot PP120 should regulate it. I found CL007, CL015 and TL003 shorted
(Navneet)
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Grundig Video Model: GV400 / GV440
Display shows "locked" (sometimes Timer is blinking)
Cassette loading is at fault, replace loading gear complete
(Mrhard)
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Toshiba TV Model: 2857DB (C5SS Chassis)
Blue screen, no sound (ok on scart) or snow on screen, no sound, no service mode and menu text fluctuates, channels can not be tuned
The tuner was faulty
(Anonymous)
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Philips TV (L6 Series Chassis)
Vertical lines are not straight when picture is very bright or has white text content
Replace resistor 3420 in the beam current circuit (12k or 15k) replaced with an 18k
(Etienne)
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<?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-comFerguson</st1:City></ST1<ST1lace w:st="on">Hitachi</ST1lace></st1:City> TV Model: C2566
Severe field cramp at bottom of the picture, but very stretched picture at the top
C608 (4.7uF, 63v.) in field stage o/c
(I.g.d.)
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Sony TV Model: KVM2511 (AE1 Chassis)
Can not switch on the set, supply ok
Suspect L807 of o/c (Pt no. 140750400) also check R008 and C017
(Anonymous)
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Sony TV Model: KV32S10
Relay clicks continuously at switch on
Replace Flyback
(Dan * dbs electronics)
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<st1:City w:st="on"><ST1lace w:st="on">Hitachi</ST1lace></st1:City> TV Model: C2117T
Goes straight to standby, after a quick burst of power
Replaced R952 (39K), had gone slightly high
(Mark t)
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Sharp TV Model: CV2123 (CS Chassis)
Field fault / general modification
Add a 1N4148 diode from the emitter of Q509 to cathode of D513 (cathode to emitter of Q509), Pt No. RH-DX0045BMZZ, change R534 to 390ohms (Pt No. VRS-TV1JD391J) and add a fuse in series with L607 and L608 (Pt No. QFS-J1023CEZZ)
(Anonymous)
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Multitech Video Model: VP-1600
Black screen on playback, no test signal
Resolder and clean test switch
(Spiros gr)
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<st1:City w:st="on"><ST1lace w:st="on">Ferguson</ST1lace></st1:City> TV Model: T14R (TX805 Chassis)
Dead, no standby led
RP41 (65k ohms) was o/c
(Brio)
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Crown TV Model: CT 2011
Crackling audio
Check for failure of IC101 (KA2914A) (TA7680AP equiv)
(Anonymous)
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Itt TV Model: ITT 3362 (Pico 2/ST3 Chassis)
Tv dies after running for a few seconds
Replace 4.7uF capacitor in the switching power supply unit!
(Handoyo)
التعديل الأخير تم بواسطة : ABO KAMIL بتاريخ 28-03-2006 الساعة 09:34 AM
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