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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: 3443
AkaiCT20K2PADark pic - increasing sub brill resulted in field collR436 120k o/c14-09-04
AkaiCT2107MS (Onwa)Int off with blob in centre of screenCheck for hairline cracks around chopper tfmr pins14-09-04

AkaiCT2159 OnwaField faulty - int lines at top etcC417 220mfd 16v, C423 2200mfd 25v, C435 470mfd 16v14-09-04
AkaiCT2159UT OnwaNo start upC910 & C912 47µ14-09-04
AkaiVariousTo enter service modePress Mute, OK, TV in sequence14-09-04
AkuraBaby 10Brightness - no controlD409 o/c14-09-04
AkuraBaby 10Dead - list of psu 2 faultsFault 1: Dry joints on IC402, also check 12V socket. Fault 2: Line output transistor is dry jointed (emitter). Fault 3: Check if fuse holder 5AT is loose. Fault 4: Replace D410 in line stage with two RGP30 in parallel. Fault 5: Check regulator block for dry joints. Fault 6: Check D410 (FR604) in the line output stage.14-09-04
AkuraBaby 10Dead - list of psu faultsFault 1: Check output of regulator IC402. S/C in DC jack may blow the 5A/T fuse. Note: IC402 can cause other faults, such as oversized picture with bent verticals. Fault 2: Check L110 for dry joint. Fault 3: [No 12V at regulator]. Check R402 (1R/0.5W) for O/C. Fault 4: Check line drive transformer (TX EM103) for dry joints. Fault 5: Check print between output and destination of (potted) regulator for O/C. Fault 6: Check line output transistor for broken print. Fault 7: Check fuse F402 and diode D402, damage due to incorrect connection of battery. Fault 8: Replace IC402. Check EEprom chip IC601 (MN1220). Fault 9: Check regulator IC401 (L7812). Fault 10: Check the DC input sockets for high resistance. Fault 11: [5A fuse blown]. Check D412 FR155 diode for S/C a BY299 will do. Fault 12: [Regulator OK]. Check line drive transformer for dry joints. Fault 13: Check mains transformer for O/C. Fault 14: [630mA fuse by switch O/C]. Check bridge rectifier for S/C. Use 1N5401 as replacement. Fault 15: Check IC402, F401 (630mA) fuse and D403, D405 in the bridge rectifier circuit. Fault 16: [F401 blown]. Check D404. Fault 17: [No PSU start up]. Check resistors R301 (330K) and R302 (330K). Fault 18: Check 12V DC-IN socket.14-09-04
AkuraCX10 (Baby 10)Int deadDry joints inside discrete type reg module14-09-04
AkuraCX35 NicamNo soundReplace Eeprom14-09-04
Alba4859 11AK19No line drive at sw on (150v HT to LOPTr)Dis'd D814/815 (+14 & -14v audio o/p ic supply diodes). Replacing TDA2615 aud o/p chip resulted in bright white raster & flickering LED; R914 47R 200v feed to IC901 TDA6107Q on crt base o/c & IC s/c14-09-04
AlbaCTV3409 11AK20SLED stays green (pic ok)Q803 BC547 st/by sw tr leaky14-09-04
AlbaCTV4808 11AK19Comes on in st/by then if button pressed blinks pale greenCheck R914 47R safety res & TDA6108JK14-09-04
AlbaCTV4808 11AK19E3No tuning but tuning bar movesQ501 BF240 - BC548C works in this position14-09-04
AlbaCTV4851 11AK19Dead - no LED displayR806 22k o/c14-09-04
AlbaCTV4851 11AK19B-1Dead with 0nly 300v pri HTOpto coupler faulty - though more faults may be present (esp if it went off in a thunderstorm)14-09-04
AlbaCTV4855 (Onwa)Low soundC202 220µ decoupling cap AND R421 0R68 in line stage hi res (1R5)14-09-04
AlbaCTV4855 OnwaNo sound/pic - blank raster5v line low at 3.6v - Q619 o/c14-09-04
AlbaCTV4859 11AK10-17DeadQ801 (BUZ77B), R809 (0.47R), IC801 (TDA4605-3), C817 (1µF 63v), R805 (330k 0.5w), D808 (BA159).14-09-04
AlbaCTV6682 11AK12green flyback lines can be seen on the picture, otherwise is Okishno green output from TDA8362A(2Y), the IC is u/s - caused by intermittently arcing LOPTx (HR6465).14-09-04
AlbaCTV840 OnwaBlack vert bars with background picC420 22µ 160v o/c14-09-04
AlbaCTV840 OnwaNo tuning although the set displayed tuning driveR125 ( 47R ) was opencircuit because C127 ( 470uF 16V ) was short circuit .These components form a filter in the 9.25V supply14-09-04

AlbaCTV841 OnwaSt/by only - relay chatters when sw held inD40114-09-04
AlbaCTV841 OnwaNo pic - appears bright when A1 advancedR430 180k in beam lim o/c14-09-04
AlbaOnwa CTV701No sound/pic just pattern on screenVideo reaching Txt pcb but not leaving it. 5v supply missing - check HT smoothing cap 100µ 160v14-09-04
AlbaSsangyong ETC. CDEAD ZD401 12v ZENER SC R414 12R 2W OC LOP TR SCCHECK HT SHOULD BE 114v CHECK ALL POWER SUPPLY CAPACITORS , ZENERS AND SOLDERING14-09-04
Amstrad3121N 11AK12St/by only - psu o/ps present except 12 & 8vIC301 (CTV352/V1.4) and IC302 (ST24C02AB1).14-09-04
AmstradCTV1410 OnwaDead with HT low at 50v (112v)No st/by relay, R632 33k pin 36 IC603 o/c14-09-04
AmstradCTV1410 OnwaSw itself back on when in st/by - intFlexing panel brought fault on - R920 & R302 were physically touching bypassing relay14-09-04
AmstradCTV1410OnwaField cramp atbottomR408 18k o/c14-09-04
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