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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: 194
PhilipsG90bright raster - poor field lin163v line low at 90v - R3570 8R2 o/c14-09-04
PhilipsG90Continuous page header display in subtitleChange text IC to type MAB8461P/W196 part No4822 209 6247914-09-04

PhilipsG90CONTRAST CONTROL LIMITEDC2560 ( 33nf ) LEAKY PIN 7 , LOPT.14-09-04
PhilipsG90Dead chopper transistor s/c.Also change CNX83A optocoupler part No.4822 130 8203414-09-04
PhilipsG90Dead.Check for drys on chip diodes.14-09-04
PhilipsG90field collapseD6465 sm14-09-04
PhilipsG90Frame collapse.Wickman fuse to o/p transis o/c , R3503/07 , R3501 390k o/c.14-09-04
PhilipsG90Int loss of tuningX2402 eeprom chip14-09-04
PhilipsG90No blue.D6416 ( BAS32 ) leaky.14-09-04
PhilipsG90NO LINE OSCIF VOLTAGE ON PIN 16 TDA2579 IF NOT 9v CHECK ACROSS D6455 5v6 ZENER IF OK HERE REPLACE T7455 IF NOT REPLACE ZENER14-09-04
PhilipsG90no start up - trippingD6611, 6613, 6614 BAS3214-09-04
PhilipsG90off with s/by led flashinght low & pulsing - R3632 15k in prot cct u/s - C2630 & R3668 also possible14-09-04
PhilipsG90Picture too bigReplace T7652 & CNX83 opto14-09-04
PhilipsG90SET WORKS BUT NO TEXT AND F7 DISPLAYED ON SCREENNO RESET PULSE TO IC7800 CHECK TR7846 AND C2843 220uF14-09-04
PhilipsG90snowy piccheck pin 6 tuner. If absent check R3001 15R14-09-04
PhilipsG90TrippingR3668 sm 150R14-09-04
PhilipsG90Tripping - works on reduced HTD6656 33v prot zener in HT sensing faulty - replace all 314-09-04
PhilipsG90trips after few mins operationTr7652 BC557C14-09-04
PhilipsG90Tuning - drift but green line moves.ZTK33B 33v stabiliser.14-09-04
PhilipsG90Verticals corrugatedC2630 ( 47uF )14-09-04
PhilipsG90AEBlank raster - text Ok.C2569 ( 33nf ) o/c.14-09-04
PhilipsG90AEBlank raster - Txt OKpin 7 TDA3561A was -ve instead of 3.4v; C2560 33nF o/c14-09-04

PhilipsG90AEBlank raster & no soundTDA585014-09-04
PhilipsG90AEBlank raster , no sound , no OSD.IC TMP47C434N-3555 IC7720.14-09-04
PhilipsG90AEBlank raster with no sound. OSD or response to R/CIC7720 reset line pin 33 stuck at 2v - chip had internal leak TMP47C434N-355514-09-04
PhilipsG90AEBLANK SCREEN NO SOUNDRESET AT 2v IC7720 PIN 33 IF DROPS WHEN PIN 33 ISOLATED REPLACE IC TMP47C434N-355514-09-04
PhilipsG90AEBlocks/Wrong OSD-indicationDisconnect pins 2 and 3 IC 7800 (TXT-uP), set functions normally. Replace IC 7800 (MAB 8461P/W196; 4822 209 62479). Mount metal shielding 4822 466 82783 on uP (IC 7720) with earth to jumper 9711.14-09-04
PhilipsG90AECharacters wrongReplace IC 7820 (SAA 5243P/E; 4822 209 30556) and replace IC 7800 (MAB 8461P/W196; 4822 209 62479)14-09-04
PhilipsG90AECogging effectC2630 47µ 160v HT res cap also change C2631 smoother14-09-04
PhilipsG90AEDark picture - no remote commands.Replace IC 7720.14-09-04
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