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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: 33
B & OMX1500INT GOES INTO SEEKMOMENTARY SWITCH NEAR MAINS SWITCH INT SC ( REMOTE CONTACT )14-09-04
B & OMX1500Won't tuneTRANSISTOR 7070 LEAKY BC54814-09-04

B & OMX1500 78XX raster but no sound or picture.ICP1640 ( 630mA ) o/c.14-09-04
B & OMX2000Bright on lh side, dark on right then goes completely darkDry joints pin 1 LOPTx14-09-04
B & OMX2000Dead TEA2026 defectiveLOPTx desroys chip so replace as well & replace or fit 15v zener between o/p pin 7 chip & chassis14-09-04
B & OMX2000Faint pic after LOPTx replacementRL25 burnt14-09-04
B & OMX2000Slightly off tune at sw onBack up battery on its way out - if no startup after replacement s/c battery terms momentarily14-09-04
B & OMX2000White hor line 3-5 cm tallNo 200v on crt base - dry joints pin 9 LOPTx14-09-04
B & OMX2000 3119St/by only (dot in display)124v HT present no line drive as RP10 1R2 hi res14-09-04
B & OMX2000 31XXBright raster with no sound.RL28 1.5ohm dry.14-09-04
B & OMX2000 31XXINT FIELD COLLAPSEDRY JOINTS ON EW DIODES OR ON CL1214-09-04
B & OMX2000 31XXNo picture.Drys on CRT base.14-09-04
B & OMX2000 31XXNo sound.6Mhz coil LD40 o/c.14-09-04
B & OMX2000 31XXStandby - no standby light.RP43 0.47ohm o/c , CR67 ( 1 , 000uf ) on microcomputer PCB8.14-09-04
B & OMX3000Various int inc field collapse, fading pic, low widthCheck for dry joints in apropriate cct14-09-04
B & OMX3500Crackling SoundDry joints audio o/p chips IC3 & 4 on PCB10 (bottom board)14-09-04
B & OMX4000Dead - PSU comps destroyedTr1 BUT12AF, Tr12 BD435 s/c, R38 0R47 o/c - C12 dry joints (hard to see)14-09-04
B & OMX4500Vision buzz & noisy picCheck C176 10µ under screening can14-09-04
B & OMX4500/5000Tuner intDiscard VHF tuner if not reqd or blanket resolder (nearest ae skt)14-09-04
B & OMX6000Dead or int trips when tappedCheck for dry joints psu pri14-09-04
B & OMX7000Dead - trippingDry joint capacitor adj to J9 in chopper ctl14-09-04
B&OMX3500crackling sounddry joints AF o/p chips IC3 & 4 on PCB10 (bottom)14-09-04

JVC25S1EK MXIINO VISION - WONT TUNE INC119 47n IF UNIT. ON PIN 2 IC 10114-09-04
JVC25S1EK MXIIStBy LED changes red to gren but no line driveCheck Q902 V if missing R903 ( 2K2 ) o/c14-09-04
JVCAV25GS1EK MXSt/by onlyDis pins 5 & 6 of EEPROM to check - if set powers up then EEPROM may be faulty (IC704 pt no CAT35C104HP)14-09-04
JVCAV25S1EK MXIIUnstable pic with line jitterVideo o/p from IF module has ragged sync pulses - 1µ elect cap in AGC feed14-09-04
JVCAV28S1EK AV25S1EK MX2St/by light changes col but no line driveNo supply to line dr tfmr as R903 2k2 hi res (switches st/by tr Q902)14-09-04
JVCAV28S1EK AV25S1EK MX2Width & E-W faultyReplaced memory chip for electronic screwdriver - 24C01A/P IC170714-09-04
JVCAV28SD4EK MXIVNo sound and all programs show the same channelCheck the data lines on pins 14 and 13 of the connector CNO13 on the sound subboard. If they are low, disconnect the lines one by one from all the chips until the correct level is restored (about 4 V p-p). Also check IC001 5V regulator for DJs, as this could be the culprit. In this case all 3 chips on the sound board had leaky data line inputs:14-09-04
JVCMX2Field int collapsesD441 RD3.0ES(B2) goes leaky when warm - to pin 13 TA8859P IC46114-09-04
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