Philips Repair Tips
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Results: 14233
Results: 14233
| Make | Model | Symptom | Problem | Solution | By |
|---|---|---|---|---|---|
| PHILIPS |
G90B
|
Page 811 appears spontanuously | Decoder selects page 811 and blocks mount new up (ic 7800) mab 8461p/w196 (4822 209 62479) on txt-decoder. | ||
| PHILIPS |
G90B
|
No vertical deflection | Vertical signal on pin 1 ic 7470 present check/replace ts 7502 (bd 939f; 4822 130 42681) check/replace ts 7503 (bd 939f; 4822 130 42681) | ||
| PHILIPS |
G90B
|
No vertical deflection | +200 v(163) not present replace r 3570 (8,2Ω; 4822 052 10828) | ||
| PHILIPS |
G90B
|
No txt; oscillator on txt decoder does not function. | Add c2802, c2803 15pf (4822 122 32504) on the teletext module u1003. | ||
| PHILIPS |
G90B
|
No txt; error code f7 displayed. | Missing reset pulse on pin 17 of ic7800 of the txt panel. check c2845 (100 uf) in the reset circuit. | ||
| PHILIPS |
G90B
|
No txt when heated | Saa5243p/e txt processor | ||
| PHILIPS |
G90B
|
No picture, sound ok. | Cvbs line to ic7360 at 0.5 volt, indicating no signal. check/replace t7032 - bc848. codenr. 4822 130 61207 | ||
| PHILIPS |
G90B
|
No picture, sound ok. | Y-signal on pin 25 ic7350 ok.replace ic 7350; tda8390/n3 (4822 209 61027) modification: c2352 to 15 pf (4822 122 32504) r3336 to 3,3 kΩ (4822 051 10332) r3338 to 2,7 kΩ (4822 051 10272 ; remove r3313, 3340, 3341, d6336 | ||
| PHILIPS |
G90B
|
No pic for 1st 5 mins - crt htrs lit | C2660 680µ in 9v supply low cap | ||
| PHILIPS |
G90B
|
No colours | 4,43 mhz on pin 3 ic 7350 available. replace ic 7350 tda 8390/n3 (4822 209 61027) modification: c 2352 to 15 pf (4822 122 32504) ; r 3336 to 3,3 kΩ (4822 051 10332) r 3338 to 2,7 kΩ (4822 051 10272) ; remove r 3313, 3340, 334 | ||
| PHILIPS |
G90B
|
Nicam sound module order code | Nicam sound module order code 4822 212 23219 "normal" 4822 212 23347 "black connection lead". | ||
| PHILIPS |
G90B
|
Nicam sound cracking in time with modulation | Capacitance diode 6312 (bb405b; 5322 130 34953) defective. (very sensitive to heat). if ic7300 (cf70123; 4822 130 61304) is defective, it can cause the same kind of symptoms. | ||
| PHILIPS |
G90B
|
Mono/stereo-indication switches | Connect a capacitor (1 uf/63v; 4822 124 20722) and a resistor (1,5 mΩ; 4822 050 21505) in parallel. in series with this circuit a diode (1n4148; 5322 130 30621) is connected (cathode on r/c circuit). mount this d/rc circuit between pin 3 ic 7220 (ster | ||
| PHILIPS |
G90B
|
Intermittently front controls and remote control do not work. | Checked supply to micro, and it was found to be low at 4.5 volts. the cause was found to be d6662 (5v1 zenerdiode; 4822 130 80884), this diode is the power supply. | ||
| PHILIPS |
G90B
|
Ic7380 flash protection | Ic7380 flash protection when replacing a defective ic7380 (tda8153) on the crt base panel, additional flashover protection is recommended. this is provided by adding a 4u7 250v electrolytic capacitor between pins 4 and 8 of ic7380 (negative to pin 8). | ||
| PHILIPS |
G90B
|
Humm in stand-by. | Replace s 5625 (sops-transformer; 4822 146 21338) | ||
| PHILIPS |
G90B
|
Function knobs on ctv fail | Replace ic 7720 (tmp47c634n-2475; 4822 816 10129) important: mount metal shielding with earth on r 3733 | ||
| PHILIPS |
G90B
|
Does not respond to commands from time to time | Check/replace ic7720 (tmp47c634/2414; 4822 209 73222). | ||
| PHILIPS |
G90B
|
Does not function | Voltage +100v available, no horizontal signal on pin 11 ic7470. replace ic7470 (tda2579/n6; 4822 209 72363) | ||
| PHILIPS |
G90B
|
Does not function | +100v available. replace s5545 (line transformer; 4822 140 10353) replace ts7545 (but11af; 4822 130 42679) |