PHILIPS 28PT4456/00
Manual de Servicio

6

Fault finding trees, diagrams and overviews

L9.1E

20

B

ERR 8
Yes

No

ERR 2
Yes

No

ERR 7
Yes

No

ERR 5 or 6
Yes

No

ERR 1, 3, 12

No

ERR 4 and/or 11

No

ERR 10
Yes

1718 uP Internal RAM error Check / replace (A7); IC7600

111D High beamcurrent , E/W and Horizontal Protection. - When the High beamcurrent protection is started, fly-back lines will be visible for 15 sec. before the set is really in protection. - When E/W or Horizontal protection is started, the set will hiccup for 4sec. before the protection is really activated. - During E/W or Horizontal protection the EHT will not be able to turn on and so the VlotAux5V to the Tuner and Sound IC is not available. As such ERROR 4 and ERROR 11 will be reported too. Message : ERR 11 4 2 0 0 Check/Replace (CRT); R3340, +200V supply or E/W,Horizontal Prot. (A2);Conn.0221

1718 General I C error. Check SCL and SDA line of all units for shortcircuit to ground or to each other. The Error code can only be read by putting the TV set into the SDM mode. The LED will blink 7 times. Check / replace (A5); Tuner1000 pin4,5 (A6); IC7250-C pin7,8 (A7); IC7600 pin49,50 (A7); IC7601 pin5,6 (A9); IC7821 pin1,24 (A10); IC7833 pin9,10 Replace the item, which causes the error.
2

111A BIMOS error. The error is detected, because there is no communications on I 2C of the BIMOS Message : ERR 4 6 0 0 0 CheckReplace (A4,A5) ; the +8VBIMOS and the I 2C lines pin7,8 of IC7250 ERROR 1 1718 X-Ray/Over-voltage Protection. (USA version only) - When the X-Ray protection is started, the set will hicc-up until the voltage at pin 50 of IC7250 becomes >3.9 Volts. At the voltage of 3.9 V the set is put in protection mode. - During x-ray protection the EHT will not be able to turn on and so the VlotAux5V to the Tuner and Sound IC is not available. As such ERROR 4 and ERROR 11 will be reported too. 111D Vertical / Frame Protection. - Before the proctection is really actived, a horizontal line will be visible for 3 sec. - During Vertical / Frame protection the EHT will not be able to turn on and so the VlotAux5V to the Tuner and Sound IC is not available. As such ERROR 4 and ERROR 11 will be reported too. Message : ERR 11 4 3 0 0 Check / replace (A3);IC7401, C2403,D6401 Conn0222 171X Fault in audio section ERROR 4 ERROR 3

Yes

171X EEPROM error - When I 2C signals or the +5D are missing on IC7601 the set can function, but will not be able to 1210 I2C Tuner error - It is possible that during +5V protection Error 4 will be reported too Message : ERR 11 0 0 0 0 CheckReplace (A5); Tuner1000 store any data. Message : ERR 10 0 0 0 0 Check/Replace (A7); +5VD IC7601 pin 5,6

+5 V Protection Check (A2); +VLotAux+5V

ERROR 11

In this situation the set turns on without sound. Message : ERR 4 0 0 0 0 Check/Replace (A10); +VlotAux+5V, IC7833 pin9,10.

ERROR 9

ERROR 12

New micro controller or EEProm.Default values were loaded. Re-align the set. If the problem persists, then IC7601 is defective (protection)

Black current calibration loop instable

CL 86532104_037.eps 190299