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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: 10
PhilipsL7.3TrippingC2550 across 9v supply leaky14-09-04
PhilipsL7.3 25PT4673TrippingC2463 1000pf 2Kv across line o/p tranny14-09-04

PhilipsL7.3AClarification of LOT to be usedClarification of LOT to be used Position 5445 (LOT) listed in the parts list in the service manual. L7.3A AA (4822 727 21566) are for different screen sizes: 4822 146 10961 all 25" sets 4822 146 10963 29" -/77 and -/78 only 4822 146 10966 rest of 29" s14-09-04
PhilipsL7.3ACodenumber informationCodenumber information LOT applied in 25" sets of L7.3A AA have codenumber 4822 146 10961.LOT applied in 29" sets of L7.3A AA have codenumber 4822 146 10966.14-09-04
PhilipsL7.3AFOR ALL 25" & 29" Change of service codeFOR ALL 25" & 29" Change of service code The code number of the Mains Switch on pos. 0139 listed in service manual L7.3A (4822 727 21566) has been changed from 4822 276 13603 into 4822 276 13816.14-09-04
PhilipsL7.3ALOT survey clarification in service manual 4822 72LOT survey clarification in service manual 4822 727 21566. The code numbers for the LOT on pos. 5445 listed in service manual 4822 727 21566 should be completed with the description listed below: 4822 146 10961 for all 25" sets 4822 146 10963 for 29"/78 &14-09-04
PhilipsL7.3ASet in protection due to wrong setting of optioncode "88" OFFNOTE: For Bimos TDA884X family option code must be "88" and "ON"1) Disconnect position 5620 (so temporary WITHOUT +5Volts to NVM) see circuit diagram A5(Control) and PCB coordinates D2;THEN SWITCH TV "ON"2) Connect coil at position 5620 again when scree14-09-04
PhilipsL7.3ASet in protection; no Supply Voltage (+11Volts and -11Volts) at IC7401Replace IC7401 by a new one, add additional diode BYD33D and also change capacitor at position 2404 to 220nF (4822 121 42868). Solution: Solder diode BYD33D (4822 130 42488) with anode to pin 4 of IC7401 and cathode to pin 5 of IC7401. Change capacitor 14-09-04
PhilipsL7.3AVideo ampl. (pos.7830; TDA6107Q/N1; 4822 209 16321) damaged by flashChange three components at CRT panel to prevent damage of IC7830. Replace resistors on positions 3832, 3834 and 3836 from 680 R to 1 K (service codenumber 4822 117 11635) REMARKS : IRIS CODE 1 3 1 X.14-09-04
PhilipsL7.3A 25PT4473/79RDead with slight arcing soundcapacitor 2463 1000pf 2KV ceramic disc arcing 14-09-04
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