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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: 1049
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
PanasonicAlpha 1Pic brightens & drops with dist field scan when heatedScan coils faulty - reqs replacement of crt as they are bonded14-09-04
PanasonicAlpha 1Pic goes in from RH side with black line across centreDry joints field o/p chip14-09-04
PanasonicAlpha 1Plain blank raster & no sound , no OSD sync - Ok via rear sockets.Replace IC101 ( TDA4505M ) in side can middle of chassis.14-09-04
PanasonicAlpha 1Q551 KEEPS BLOWINGCHECK DRY-JOINTS ON LINE OUTPUT TRANSFORMER14-09-04
PanasonicAlpha 1Raster - blanking out.IC801.14-09-04
PanasonicAlpha 1Reduced top frame after a few minutes.Scan Coils!14-09-04
PanasonicAlpha 1Remote commands int ignoredDry joint X3505 Xtal on Txt pcb14-09-04
PanasonicAlpha 1Replacement of TDA4505M-N3You can use cheaper TDA4505E if R113 changed from 22k to 270k, R112 from 1M2 to 470k & re-align afc coil14-09-04
PanasonicAlpha 1Replacing TDA4505M-N3 with TDA4505EChange R113 from 22k to 470k; R112 from 1M5 to 470k; align AFC for optimum pic14-09-04

PanasonicAlpha 1ScreamsHt=20v lop tr 2SD1439 leaky CP567 1A cct prot o/c14-09-04
PanasonicAlpha 1Squealing.Line drive transformer.14-09-04
PanasonicAlpha 1TDA4505M-N3 replacement by TDA4505EChange R113 from 22k to 470k; R112 1M5 to 470k & re-align AFC as nec14-09-04
PanasonicAlpha 1TrippingD854 SR2KN avalanche diode s/c due to C808 10µ 50v low cap (could also be STR54041M chopper chip) it is advisable to change both14-09-04
PanasonicAlpha 1Tripping with field collapseR7000 180k & R7005 150k start up res on side panel14-09-04
PanasonicAlpha 1Tuning - drift.IC801.14-09-04
PanasonicAlpha 1Whistling D854 s/c (RM2)C808 10mfd 63V in psu o/c Replace RM214-09-04
PanasonicAlpha 1 TX2482Line foldover then dead with LOPTr 2SD1441 s/cCheck for dry joints line dr trfmr & LOPTx14-09-04
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