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Repair tips

Electronic appliance repair tips database - TV (LCD,TFT,Plasma,Digital), Monitor, VCR, DVD recorder and player, Digital camera, Audio equipment, Microwave ovens, Phone systems, Computer repair

MakeModelProblemSolutionDate
Found: 776
MatsuiTVR161Blows 4A fuse at sw onQ500 fet chopper (2SK2056) s/c, R501 (2R2 7W) o/c, C515 (1mfd, 160v) and C504 (47mfd) high esr. Print to pin 3 TDA4605-3 chopper control Ic o/c14-09-04
MatsuiTVR161chopper FET s/c Q500 2SK2056check R504 330k; R506 820k metal film 350v also check 2R2 7w limiter14-09-04

MatsuiTVR161DeadR504 390k o/c (pin 2 of TDA4605-3) R505 330K Blows 2SK2056 2.2Ohmn 7w/w to bridge rects Changed all inc ic and C515 1uF 160v C504 47uF 25v 14-09-04
MatsuiTVR161DeadR506 820k in psu o/c, Q500 2SK2056 FET s/c, & check C515 1µ 160v, C504 47µ 25v & R504 330k14-09-04
MatsuiTVR161Dead - R508 in chopper overheats & destroys FETReplace R508 47k (not 4k7) & Q500 FET 2SK205614-09-04
MatsuiTVR161No pic with fb linesHT to RGB o/p only 50v; C431 22µ 250v14-09-04
MatsuiTVR161Slow start up before going deadreplaced q500 (2sk2056) + r508 47k res+ic501 tda4605-3 + the cause of the problem c504 47mfd (high ESR)14-09-04
MatsuiTVR162Deadstart up res R506 560k o/c14-09-04
MatsuiTVR162Sound level low on pbackCheck elects in audio stage14-09-04
MatsuiTVR180Dark picC819 2200pf 2kv leaky on crt base14-09-04
MatsuiTVR180Dead - PSU blownSTRF6707, R542, R543, R503, 22u, 100u & opto coupler14-09-04
MatsuiTVR180Dead with front blown off STRF6707STRF6707 R542 0R39 1W, R543 680R, R503 4k7 14-09-04
MatsuiTVR180Dead with psu pulsingLOPTr 2SD2599 s/c - replaced with BU508DFI - no reason found for its demise14-09-04
MatsuiTVR180Dead, front blown off the STRF6707replace STRF6707; R542( 0R39 1 watt ); R543 ( 680R );R503 ( 4k7) & 100uF & 22 uF in psu14-09-04
MatsuiTVR180Low height aft EEPROM replacemententered service mode Vol(-) +9 on H/Set. change vert amp setting from 30 to 45 on both. had to wait overnight for the backup battery to discharge, (to get into service mode)14-09-04
MatsuiTVR180No I/P from SCART or access to tuning menu or i/p selectEEPROM corrupt - reprog IC14-09-04
MatsuiTVR180No sound, AFC offEEPROM corrupted14-09-04
MatsuiTVR180Shows "Protected" after fitting EEPROM PCBI/P any 4 digit code 3 x until screen displays ''protected''. Then hold ''volume down'' on TV & ''7'' on remote.14-09-04
MatsuiTVR180Tuning not possible above chan 26Tuner faulty14-09-04
MatsuiTVR180RSt/by onlyEEPROM chip can be the cause - MODKIT37 from Grandata can be used14-09-04
MatsuiTVR185Field collapse int - could be tappableD401 int o/c14-09-04
MatsuiTVR185TDead - 330v across mains capSTRF6707 IC50114-09-04

MatsuiTVR2062Bright red screen at sw on then cuts outCRT faulty - a gentle tap may help!14-09-04
MatsuiTVR2062TSStuck in Protect ModeFirst attempt to guess the four digit code by using any random numbers. On your third unsuccessful try the unit will stop asking for pin numbers on screen and go into the "protect mode" Within 5 seconds hold in the volume down on the TV at the same time as pushing the Number "7" on the remote handset. The set should then come on in the "unprotected mode" & you can see & alter the pin code in the correct menu if you desire. BTW if you have made three incorrect guess, this set has to be left unplugged for sometime B4 it allows you to guess again! It will go into standby within 10 seconds after "protect" is flashed on the screen.14-09-04
MatsuiVTR161Field dist68k 1/4 watt R425 from pin 3 of fo/p chip IC402 LA7837 was going O/C as the PCB was being flexed.14-09-04
MatsuiVTR161No soundsafety res R 511 6R8 1w - feeds the sound output stage +B rail to the VCR PCB was O/C. This resistor is located at the front of the TV PCB at the bottom & hidden by a large black heatsink carrying a couple of regulators.14-09-04
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