Philips Repair Tips
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Results: 14209
Results: 14209
| Make | Model | Symptom | Problem | Solution | By |
|---|---|---|---|---|---|
| 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 | ||
| 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 | ||
| 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 | ||
| 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 | ||
| 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 | ||
| 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 | ||
| 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. | ||
| 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 | ||
| 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 | ||
| 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 | ||
| 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) | ||
| PHILIPS |
L7.2
|
Totally inoperative, only red led. no +95 volt | Check soldering of l5451. | ||
| PHILIPS |
L7.1A AA
|
Dead | 2r2 5w res o/c, 330pf 2kv near fet split & replace fet with buz90 & mica washer | ||
| PHILIPS |
L7.1A
|
Strange behaviour of the menu pictures and the sound volume level | Replace network resistor item 3601 (see diagram a4) remarks: the reason for the above mentioned symptom is that in some network resitors some leakage current can occur. iris code 235x | ||
| PHILIPS |
L7.1A
|
Modification | Modification: for l7.1a aa 20" typenumbers 20pt1xxa/75r, 73r, 50b, 59s, 70b .the crt panel used on the mentioned sets has been changed to 4822 212 11499 from production week 9723 onwards. for sets with production before 9723, the old crt-panel 4822 212 11 |