| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Philips | L7.3A 25PT4473/79R | Dead with slight arcing sound | capacitor 2463 1000pf 2KV ceramic disc arcing | ||
| Philips | L7.3A | Video ampl. (pos.7830; TDA6107Q/N1; 4822 209 16321) damaged by flash | Change 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. | ||
| Philips | L7.3A | Set in protection; no Supply Voltage (+11Volts and -11Volts) at IC7401 | Replace 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 | ||
| Philips | L7.3A | Set in protection due to wrong setting of optioncode "88" OFF | NOTE: 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 scree | ||
| Philips | L7.3A | LOT survey clarification in service manual 4822 72 | LOT 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 & | ||
| Philips | L7.3A | FOR ALL 25" & 29" Change of service code | FOR 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. | ||
| Philips | L7.3A | Codenumber information | Codenumber 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. | ||
| Philips | L7.3A | Clarification of LOT to be used | Clarification 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" s | ||
| Philips | L7.3 25PT4673 | Tripping | C2463 1000pf 2Kv across line o/p tranny | ||
| Philips | L7.3 | Tripping | C2550 across 9v supply leaky | ||
| Philips | L7.2EAA | Field cct upgrade | Add 51v zener between pins 4 & 5 IC7401 (cath pin 5) | ||
| Philips | L7.2EAA | Dead aft initial front LED lit bright | R3451 o/c due to Field chip IC7401 u/s & check D6468 | ||
| Philips | L7.2E 21PT1663 | Reverts to st/by aft brief period (no pic) | Prot mode operating - FOP chip IC7401 was s/c & R3449 1R ½w, R3451 2R2 1/3w o/c. Fit BZX79C51 zener across pins 4 & 5 of FOP chip (anode pin 4) to prevent chip damage | ||
| Philips | L7.2E | St/by only - insufficient lin dr | LOPTx | ||
| Philips | L7.2E | Rattle or no sound during autosearch and receiving 2CS BG programs | Replace the IC7202 (MSP3400) on the audio board by MSP3410D. Service code 4822 209 15832 REMARKS: Fault only occurs in types 21PT4204/00; 21PT4305/00; 21PT4404/00; 52TA4315/03 |