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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: 314
AiwaSE211KSt/by onlyR617 high (replace with 390K 1/4W) - located behind LOPTX.This causes the micro-controller to shut the set down and store this condition in the EEPROM. You can either replace the EEPROM with the correct one from Aiwa (which then requires setting up with a special handset), or use an EEPROM programmer to reset the values. There are two values that require resetting: $0139 should be $00 ($2F when faulty) $013C should be $00 ($33 when faulty) 14-09-04
AiwaTVSE211No vid/raster with sound - no/poor OSDIC303 (OSD Sw) pt no Aiwa87A2116701014-09-04

DaewooDTE28G7GB CP785No sound/pic - psu & line drive okTDA8385J FOP chip faulty14-09-04
GoldstarCI14E20F CI20E20SOUND OR COLOUR VARIES INT.IC01 Pt No OISG853403A . CHECK ALSO Q06 FOR DRY JOINTS .14-09-04
GoldstarCI14E20F CI20E20F CI20A96FInt sound & col variationReplace IC01 & check Q06 for dry joints14-09-04
GoldstarCI20E20FTuning driftQ06 KTC3198V, ZD401 33v, D404 1N4148 in tuner & C415 220µ 16v, C414 47µ 50v, C418 10µ 50v in LOP stage14-09-04
GoodmansF19 Proline 28N1high freq whistlereplace L3 mains suppression coil (Formenti part no 88700503131)14-09-04
GoodmansF19 Proline 28N1no pic, sound OKno 200V to CRT, D27 (Formenti part no 88710202002) and L23 o/c (88700503135)14-09-04
ITTCore 2 110degSmall pic with ballooningR536 33k in anti breathing cct o/c14-09-04
ITTCore 2 90degWont turn on from st/by - ok from switchD702 11v zener leaky in st/by supply14-09-04
ITTCP3128 CORE 2SET GOES INTO STBY BUT WON'T COME OUTCHECK D702 11v ZENER , R655 2k7 , R701 THERMISTOR14-09-04
ITTFX6320 CORE 2DeadD502 ( BY448 ) by LOPT14-09-04
LGCI20E20Dead with STRS5707 chopper chip & bridge rect s/cAlso replace 4 x elects in psu14-09-04
Loewe-OptaME26/Chassis110C8East-West. Excessive width, won't adjust.Change L573. Seemed to be OK visually.14-09-04
Loewe-OptaME26/Chassis110C8Very int. Field collapse, white line in the center of screen for a few seconds, and then black screen with no sound.When the problem occurs, make continuity check between pin 12 of the yoke plug and pin6 of vertical IC. If open, fit a piece of wire.14-09-04
Loewe-OptaME26/Chassis110C8Won't start, goes to Stby. Hor driver T541 Sced, supply resistor R503 oc. After replacement, It was Sced again.Change C546 0,33uF/250V located in front of the LOPT transistor. Also check/replace C503 22uF cap.14-09-04
MitsubishiEE2black line down lh sideR571 560R 1w o/c14-09-04
MitsubishiEE2 CT14MS1LStuck in AV modeCheck for cracks around tuner lugs14-09-04
NEI2891 (CE25)Dead - off with a bangChopper Tr 100 SGSIF344, D104 5v1 zener, TDA8380 control chip all s/c; IC100 TCTD1101 opto coupler leaky, R102 0R22, R109 13k7 burnt out, C122 22µ 100v leaky14-09-04
NEI2891FTXN CE25Int reverts to st/byDry joint at link under C15414-09-04
NEIC28F1FXN CE25Dead - st/by LED flashesC110 220µ 63v low cap14-09-04
NEIC28F1FXN CE25No E/W or width settingsIC106/7 replacement have no effect - no line pulse to IC107 TDA8145 - R122 150k o/c14-09-04

NEICE25 seriesInt start up / IF instabilityConnect wire link between jungle IC ground lugs to chassis14-09-04
NEICE25/28 seriesSt/by only with LED sw correctlyCheck PSU earth link between tuner & LOPTr heatsink for dry joint14-09-04
NEIE28G1FXN E5Dead - all sec rails low - no st/by LEDT682 BD679 15v reg14-09-04
NEIE28G1IFXNDead - BUZ90AF chopper tr 651 s/cCheck D653 is BYT52M not BA158 - & check hi value res to pin 2 & 3 of TDA4605 & for dry joints & Mains smoothing cap 220µ 400v is not o/c14-09-04
NEIE28G1TFXNDark pic & osd - R/C inoperative5v reg feed near rect diodes on psu sec only 4v - (7v in st/by); R686 2R2 hi res14-09-04
NEIE28G1TFXNDead with faint tripping noiseC665 220µ 400v o/c14-09-04
NEIE28G1TFXNInt sound & vision & power led dimPoor joints at rects on sec of chopper tfmr14-09-04
NEIE28G1TFXNWidth comes in and hour glass effect, int clears to excessive widthC753 680nF 630VW was dry jointed & damaged, L751 causede excess width (had shorted turns) 690 turns reqd - TDA4950 & BY299 diode14-09-04
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