Repair tips database, Service Manual free download,schematics,datasheets,eeprom bins,pcb,repair info for test equipment and electronics

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

Make	Model	Problem	Solution	Date

Found: 16
Philips	L7.2	Totally inoperative, only red LED. No +95 Volt	Check soldering of L5451.	14-09-04
Philips	L7.2 21PT4424/05	Reverts to st/by aft 3 secs	FOP chip overheats causing R3451 2R2 0.5W o/c near LOPT and frame IC7402 TDA9302H u/s (replaced with TDA8172)	14-09-04

Philips	L7.2A	Codenumber information	Codenumber information : In the partlist of the manual of chassis L7.2A AA is mentioned for LOT item 5454 code 4822 140 10634. This is the code number for the 14" and 20" executions. The code number for the 21" was not indicated. This code number is 4822	14-09-04
Philips	L7.2A	Codenumber information	Codenumber information:I n the partlist of the chassis manual of L7.2A the code numbers of the microprocessors item 7600 where not indicated. For the code numbers see below: PAL/MULTI with TXT 4822 209 16173 (SAA5297PS/054) version PM2.1 - PAL/MULTI n	14-09-04
Philips	L7.2A	Distorted and cracking sound during NICAM sound reception	Replace the capacitors item 2225 and 2226 (both 10pF) on the NICAM panel by capacitors with a value of 1.5pF (5322 126 10225). REMARKS: IRIS CODE is 1532	14-09-04
Philips	L7.2E	Crack in sound when switching to a stereo FM program (2CS)	This happens before the word "stereo" appears on the screen. Put the sound board option code (SB) to IT position instead of NI. This setting will be activated if you switch the TV set OFF and ON. REMARKS : IRIS CODE 1 5 4 X.	14-09-04
Philips	L7.2E	Dead - eht comes up then goes to st/by	Field o/p IC TDA9302H - -ve I/p s/c to chassis - chip u/s	14-09-04
Philips	L7.2E	How to enable/disable Hotel mode	See chapter 5.7 Chassis doc L7.2E AA, but with some difference in menu handling. Pr 38, local vol -/+ and RC OSD > 3 sec. Hotelchannel 38 appears, you can get confirmation by using the stop rule but this is not necessary. Now the intallation menu is unac	14-09-04
Philips	L7.2E	Installation impossible	When child-lock is actived for one channel then it is impossible to install new channels. You have to find the channel that is locked, or set child-lock for all channels and then you can disable childlock (for all channels at once). If you forgot your con	14-09-04
Philips	L7.2E	No vertical deflection	Replace IC7401 (TDA9302H), add also a zenerdiode BZX79C51 between the pins 4 and 5 of the IC. Anode of the zenerdiode to pin 4 and the cathode to pin 5. Service code BZX79C51 is 4822 130 34257 REMARKS :It is recommended to apply above mentioned modifica	14-09-04
Philips	L7.2E	Preventive action	Preventive action: For all L7.2E sets brought in service, the next action should be done in order to prevent frame IC7401 (TDA9302H) from damage. Mount a zenerdiode BZX79-B51 (4822 130 34257) anode on pin 4 IC7401, cathode on pin 5 IC7401. In case IC7401	14-09-04
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	14-09-04
Philips	L7.2E	St/by only - insufficient lin dr	LOPTx	14-09-04
Philips	L7.2E 21PT1663	Reverts to st/by aft brief period (no pic)	Prot mode operating - FOP chip IC7401 was s/c & R3449 1R ?w, R3451 2R2 1/3w o/c. Fit BZX79C51 zener across pins 4 & 5 of FOP chip (anode pin 4) to prevent chip damage	14-09-04
Philips	L7.2EAA	Dead aft initial front LED lit bright	R3451 o/c due to Field chip IC7401 u/s & check D6468	14-09-04
Philips	L7.2EAA	Field cct upgrade	Add 51v zener between pins 4 & 5 IC7401 (cath pin 5)	14-09-04

page: 1

FB - Links - Info / Contacts - Forum - Last SM download : dbx 1531X

script execution: 0.12 s