| Make | Model | Problem | Solution | Date |
| | | |
| Found: 4551
|
| Philips | CP90 | Focus fluctuates | Tr5763 | 14-09-04 |
| Philips | CP90 | Frame collapse - with small scan below it. | Crack in print by R3275. | 14-09-04 |
| Philips | CP90 | From cold will come on if warm will not start up | D6670 ( IN4418 ) | 14-09-04 |
| Philips | CP90 | Function knobs on CTV fail | Voltage + 4,9 V on pin 42 IC 7840 present.
Oscillogramm on pin 31,32 present.
Replace IC 7840 (TMP47C432P-8188; 4822 310 31849).
Important: mount the metal-shielding with earth to bridge 9732
(TMP47C432P-8189; 4822 310 31851) | 14-09-04 |
| Philips | CP90 | Impurity & lines at sw on | Degaussing therm 98017 - used 96009 & dry joints loptx | 14-09-04 |
| Philips | CP90 | Int dead with whistle from chopper | C2700 4.7uF O/C in the PSU. | 14-09-04 |
| Philips | CP90 | Int fail to switch on | C2700 4µ7 | 14-09-04 |
| Philips | CP90 | Int flashing - low gain - poor sync. | Drys in IF/Sync can. | 14-09-04 |
| Philips | CP90 | Int height | dry joints in fop stage & psu | 14-09-04 |
| Philips | CP90 | Int off when heated | Pin 2 chopper tfmr T5654 dry joints | 14-09-04 |
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| Philips | CP90 | INT PICTURE | DRY JOINTS IN IF CAN | 14-09-04 |
| Philips | CP90 | Int sound at switch on | bad conns h.phone skt - linked out | 14-09-04 |
| Philips | CP90 | Int sw on from cold | C2703 33µ from pin 10 chopper trfmr & C6238 470µ pin2 LOPTx | 14-09-04 |
| Philips | CP90 | Int switch on from cold | C2703 330µ 25v | 14-09-04 |
| Philips | CP90 | Int trip & patterning or dead with no line osc | C2691 330µ 25v low cap also check C2703 | 14-09-04 |
| Philips | CP90 | Int trip from cold | C2700 4µ7 63v crowbar trip decoupler | 14-09-04 |
| Philips | CP90 | INT WON'T COME ON FROM COLD | C2703 330uF 25v LOW | 14-09-04 |
| Philips | CP90 | Intermittent loss of sound. | Headphone socket. | 14-09-04 |
| Philips | CP90 | Intermittent red , green or blue. | Check for drys on CRT PCB. | 14-09-04 |
| Philips | CP90 | Line output transistor, T7619, repeated destruction. | Check/Replace TDA2579 (4822 209 72363) line oscillator, replace T7630 line driver - BF483 (4822 130 42607). | 14-09-04 |
| Philips | CP90 | Line pullong & Field jitter | C2075 ( 10uF ) | 14-09-04 |
| Philips | CP90 | Loud buzz in st/by | St/by Thy D6726 | 14-09-04 |
| Philips | CP90 | Low contrast picture. | C2495 ( 33nf ) o/c. | 14-09-04 |
| Philips | CP90 | Low R/C range | TDA3047 Rx chip | 14-09-04 |
| Philips | CP90 | Memory batt drains aft several days | C2901 22nF leaky | 14-09-04 |
| Philips | CP90 | Motorboating power supply. | Replace D6694 by BYD331 (4822 130 42606),
D6701 - 1N4148 (4822 130 33939), D6702 - 6.2V zener (4822 130 34167). | 14-09-04 |
| Philips | CP90 | No chan display or st/by light | C2875 330µ 6.3v s/c | 14-09-04 |
| Philips | CP90 | No chans or display (aft loptx replacement) | No 6v to led drivers Tr7876 & Tr7878 - check C2875 330µ 6v | 14-09-04 |
| Philips | CP90 | no col | pin 6 TDA3561A = 0v ; C2278 22n leaky | 14-09-04 |
| Philips | CP90 | No col | make sure that the TDA3561A is a Philips type and NOT a Telefunken type The TFK ones do not work for some reason. Try overriding the colour killer by connecting pin 6 to 12V rail via a 470 ohm resistor. If the reference is off check components around pins 23-26 inclusive. Also check C2282 and C2283 (pins 4 & 2 respectively) C2281 may also have dried out.Make absolutely certain that the sandcastle pulse is ok. Many odd faults can be caused by this not being quite right. If possible change the TDA2579 sync chip (it's in the IF can). This also brings into question the line phasing. This is also an adjustment in the IF can. R3055 is the line hold. R3038 is the line phase. These pots may not be easy to get to in situ but I would try giving both of them a tweak as they will affect the reference oscillator. | 14-09-04 |