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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: 255
PanasonicAlpha 1blank raster - no if noiseTDA4505M-N3 jungle chip faulty14-09-04
PanasonicAlpha 1Blank raster with no sound, st/by led perm onIC1203 micro MAB8461PT134 faulty - no SDA data pin 2 & pull up only 1.3v - lifting pin restored 4.8v14-09-04

PanasonicAlpha 1BLOWS LINE TRANSISTORLINE DRIVER TX DRY JOINTED14-09-04
PanasonicAlpha 1Colour - flashing bright blue.IC801.14-09-04
PanasonicAlpha 1Dark defocussed bars moving down screenCRT low emission - minimise by adj of A1s14-09-04
PanasonicAlpha 1DeadQ802 SBY SWITCH 2SD965R14-09-04
PanasonicAlpha 1DeadQ551 2SD14441 Line output transistor s/c R567 1 amp fuse link o/c D854 R2KL s/c, C808 10ufd in power supply sending ht up to 190 volts14-09-04
PanasonicAlpha 1DeadQ802 2SD965R st/by sw tr in psu s/c14-09-04
PanasonicAlpha 1Dead - display onlyQ801 &Q802 2SD956/R Tr's leaky14-09-04
PanasonicAlpha 1Dead - fuse Ok.IC801 STR54041M chopper control IC.14-09-04
PanasonicAlpha 1Dead - no psu outputD851 HT rect s/c C2408M14-09-04
PanasonicAlpha 1Dead or int start up - chan display onlyHT to STR54041 - chip faulty14-09-04
PanasonicAlpha 1Dead STR54041 blownQ801 & Q802 (both 2SD965). C808 (10mFd 50V) also replaced14-09-04
PanasonicAlpha 1Dead with psu squealingLine dr tr s/c - driver tfmr faulty due to arcing between heatsink lugs & print by driver tfmr14-09-04
PanasonicAlpha 1Dead.2SD965R standby switching transistor Q802 s/c.14-09-04
PanasonicAlpha 1Field - Txt lines at top of picC455 100µ 35v hi esr14-09-04
PanasonicAlpha 1flashes 1 col brightly then off with squealo/c coil on crt base14-09-04
PanasonicAlpha 1Grey Scale poor with weak BlueD306 on B o/p from decoder - used 1N414814-09-04
PanasonicAlpha 1Height reduced to 1 inchIC451 TDA3653A, C554 10µ 250v hi esr14-09-04
PanasonicAlpha 1High HT (128 instead of 119v)C808 10µ 50v hi esr14-09-04
PanasonicAlpha 1Int flicks off tune with momentary bright blue rasterChopper chip IC80114-09-04
PanasonicAlpha 1Lack of col at top of pic whilst playing pre-recsChange C604 from 0µ047 to 0µ3314-09-04

PanasonicAlpha 1Lack of height - lin okFit 3R3 resistor across R461 to increase height14-09-04
PanasonicAlpha 1Lines with whistleC808 10µ 63v14-09-04
PanasonicAlpha 1LOPTr Q551 int blowsCheck dry joints line dr trfmr & R567 1A fusible resistor14-09-04
PanasonicAlpha 1No colReplace sub carrier trimmer and adj; check PAL delay line by subst14-09-04
PanasonicAlpha 1No pic/sound - chan ind lit, psu whiningC808 hi esr, R567 pt no TSF19102 (fuse) - used 1.4A Wickman14-09-04
PanasonicAlpha 1No sound or picture - squealing.Line drive transformer.14-09-04
PanasonicAlpha 1No sound/pic off air or via scartIC2601 M51320P AV sw chip - to check, remove chip & jumper I/P & O/P pins14-09-04
PanasonicAlpha 1off - safety res R851 2R2 o/c when replaced loud buzzwhen base of line driver tr lifted buzzing stops. No line drive replaced TDA4505M-N3 jungle chip (must be correct suffix)14-09-04
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