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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: 4551
PhilipsG90AENo redD6854 BAS32 sm diode s/c14-09-04
PhilipsG90AENo soundCheck sm diode near audio ic for dry joints14-09-04

PhilipsG90AENo sound - blank raster , no OSD.IC TMP47C434N-3555 IC772014-09-04
PhilipsG90AENo sound with "F7" in displayC2661 22µ in 5v reg cct14-09-04
PhilipsG90AENo sound, picture OKPicture present, program selection functions. Replace IC 7220 (TDA 8191; 4822 209 60103)14-09-04
PhilipsG90AENo sound, picture OKPicture present, audio signal present on pin 17 of IC 7220. Replace BU 5 (4822 267 60188)14-09-04
PhilipsG90AENo startup.D6653 leaky.14-09-04
PhilipsG90AENo synchronization, pin 7-IC7470 lowCheck C2469 (22uF; 4822 124 20698) for short-circuit. 14-09-04
PhilipsG90AENo text, front controls perform wrong task.i.e. brightness varies when volume buttons are pressed. Check 5 volts to uP. If supply voltage low eg. 3 volts instead of 5 volts, check/replace D6662 in Power Supply Part. D6662 - 5.1 Volt zener diode (4822 130 80905)14-09-04
PhilipsG90AEno tuning caused by the SDA3202-2 in the tunerIf there is no oscillation at the Xtal , change the IC , the same is true for the CUC3400 Grundig 14-09-04
PhilipsG90AENo Txt & "F7" in display with sound possibly missingC2843 220µ14-09-04
PhilipsG90AENo vertical deflectionNo vertical control signal on pin 1 IC 7470 Replace IC 7470 (TDA 2579/N6; 4822 209 72363) Replace D 6465 (BAS 32L; 4822 130 80446)14-09-04
PhilipsG90AEOscillation wide in weak field on the right side.It moves to the left and disappears after the set has warmed. Check/replace transistor 7533 (BC636; 4822 130 44283) in east-west circuit.14-09-04
PhilipsG90AEOver-voltage circuit activeDisconnect connector A5 and connect a bulb to +95 Volt. Bulb burns. Check/replace TS7545 (BUT11AF;4822 130 42679) and S5545 (line transformer; 4822 1040 10306)14-09-04
PhilipsG90AEPic goes dark aft 2hrs & no chan change Display shows F4IC7720 faulty14-09-04
PhilipsG90AEPicture becomes dark from time to time, cannot be adjustedTransistor 7869 (PMBT2369; 4822 209 73852) base not soldered. 14-09-04
PhilipsG90AEPicture too darkVoltage on pin 7 S 5545 (line transformer) < 3,2V Replace C 2560 (33 nF; 4822 121 51385).14-09-04
PhilipsG90AEPoor contrast rangeC2560 33nF leaky in beam current limiter cct14-09-04
PhilipsG90AEPopping from spkrs only at sw onC2630/31 smoothing caps 47µ 250v14-09-04
PhilipsG90AEPower supply failureIn the event of a failure in the switch-mode power supply, the switching transistor IC7625 may have failed. In this case it is recommended that the opto-coupler IC7614 should also be replaced. 7625: BUT11AF; 4822 130 42679 7614: CNX83A; 4822 130 8203414-09-04
PhilipsG90AEPSU pulsing with LED flashing in timeHT o/p only 80/90v when LOP dis'd (should be 95v) - check soldering of sm comps on psu sec14-09-04
PhilipsG90AEPulsing/rolling/jagged white line at top of screenIC7470 TDA2579 timebase chip14-09-04

PhilipsG90AERagged pic, dim displayC2640 680µ 22v smoother, C2580 470µ 12v smoother14-09-04
PhilipsG90AERagged verticals on some pictures.C2630 ( 47uF ) HT reservoir con.14-09-04
PhilipsG90AERagged vertsC2630 47µ HT res cap leaky14-09-04
PhilipsG90AEREDUCED HEIGHT , TOP FOLDOVERR3508 24k HIGH14-09-04
PhilipsG90AERemote control inoperative - dark picture.Replace IC 7720.14-09-04
PhilipsG90AEReplacing the EAROMReplacing the EAROM.The memory IC has been replaced by type ST24C02CP (code no.4822 209 62098). On some receivers however, the circuit will have to be modified. a. If the ST24C02CP is being fitted in place of an X2402 no circuit changes will be required14-09-04
PhilipsG90AEServicing the Philips G90AE ChassisSee TV Mag Jan 199714-09-04
PhilipsG90AESet blocksVoltage on I2C-Bus (pin 5 and 6 IC 7720) < 4,9 V No pulses visible on oscilloscope when selecting another program Replace IC 7770 (ST24C02CP; 4822 209 62098). Mount metal shielding 4822 466 82783 on uP (IC 7720) with earth to jumper 9711.14-09-04
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