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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: 1049
PanasonicAlpha 3Colour varies - blue content reduces - intC352 330pF ceramic cap decoupling Q366 emitter14-09-04
PanasonicAlpha 3Dark blank raster - no sound.C1251 ( 10nf ) leaky , main microcontroller & memory chips.14-09-04

PanasonicAlpha 3Dark blank raster with no sound or displayNo micro activity - dis serial & clock lines to Txt panel to elliminate this cct; set works when this was done - IC3507 was faulty (MAB8461PW13S)14-09-04
PanasonicAlpha 3Dark pic getting worse with timeQ355 2SC3311 on crt base leaky (black level ref)14-09-04
PanasonicAlpha 3Dead - blows R822 4R7 5W & R555 LOP fusibleLine drive wfm dist - C501 0µ1cap in line osc stage leaky14-09-04
PanasonicAlpha 3Dead - LOPTr leakyAlso check R567 1A fuse feeding LOP stage for o/c14-09-04
PanasonicAlpha 3Dead - R555 fusible res o/c in LOP stage feedLOPTx14-09-04
PanasonicAlpha 3DEAD APART FROM BUZZING NOISER555 FUSIBLE RESISTOR OC IF EHT TOO HIGH AFTER REPLACING SUSPECT LOPT14-09-04
PanasonicAlpha 3Dead with LED flickering at sw onQ823 conducting as opto was turned on; Q825 was sw on because C822 0µ01 ceramic cap leaky14-09-04
PanasonicAlpha 3Dead.R555 HT feed o/c.14-09-04
PanasonicAlpha 3E-W bowing with no control effectCheck TDA8145 IC701 & R708 & L701 also 0µ01 50v decoupling cap to pin 1 IC70114-09-04
PanasonicAlpha 3Fault Notes: Panasonic Alpha 3 ChassisSee TV Mag July 199414-09-04
PanasonicAlpha 3Field collapseC400 10n 50v connected to pin 2 TDA2579A tbase chip14-09-04
PanasonicAlpha 3Goes dark with no sound when heatedC1251 10nF was leaky in micro reset cct14-09-04
PanasonicAlpha 3Goes off aft 3 hours - flashes & shuts downCheck heatsink clip on IC89114-09-04
PanasonicAlpha 3GREEN AND RED "GLITCHES" ACROSS SCREEN , TEXT DISPC649 ( 120pf ) PIN 3 IC302 PIC TRANSIENT14-09-04
PanasonicAlpha 3INT DIAGONAL BLACK/WHITE STRIPESD329 ZENER Pt No MA406814-09-04
PanasonicAlpha 3Int loss of sound & picDry joints prescaler chip inside tuner14-09-04
PanasonicAlpha 3INT LOSS OF TUNINGDRY JOINTS ON PRESCALER IC IN TUNER14-09-04
PanasonicAlpha 3Loss of Video & Audio sigsLoose panel H due to customer pushing in Scart leads14-09-04
PanasonicAlpha 3No col when using AV connectorCheck front AV2 source sw is not set to "S" posn14-09-04
PanasonicAlpha 3No ColourIC303 TDA3505 vid control chip pin 16 was low instead of 3v - C644 0µ01 ceramic decoupler leaky14-09-04

PanasonicAlpha 3No colourRef osc not working; 0µ01 ceramic cap connected to pin 14 IC601 decoder chip leaky14-09-04
PanasonicAlpha 3NO COLOUR PIN 16 TDA 3505 LOW ( NOT 3v )C644 0.01uF SC14-09-04
PanasonicAlpha 3No g in txtD3309 o/c - D3308 or D3310 could cause same problem with other cols14-09-04
PanasonicAlpha 3No tuning memoryChip select signal from pin 53 of micro to memory chip missing - L1209 o/c14-09-04
PanasonicAlpha 3Poor focus - adj focus varies brillinternal leak in CRT between A1 and focus electrodes14-09-04
PanasonicAlpha 3R822 4R7 10W SURGE LIMITER BLOWN , WHEN REPLACED RREPLACE C501 0.1uF14-09-04
PanasonicAlpha 3Red & Green 'gliches' across screen intOK in Txt mode - C649 120pF faulty - pin 3 IC302 transient improvement chip14-09-04
PanasonicAlpha 3St/by onlyQ825 opto driver hard on. Removing R843 which links base of tr to micro power on/off pin produced a blank raster. Micro reset line stuck at 2v instead of 5v - C1251 10nF was leaky14-09-04
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