PIONEER DVS5
Manual de Servicio

5

6

7

8

A

In a case when no image from any input appears
� Reset discharge is occurred. � Mask is displayed. � DSD is not displayed. YES Examination of the MAIN board YES Is the voltage at Pin 51 of IC8501 3.3 V DC? NO Disconnect the cable from the PN1 connector. Check if 3.3V DC is output from Pin 1 of PN1. YES YES Waveform 33 Failure in the MAIN PWB NO Failure in the power supply unit, or PN1 cable broken
B

NO

Diagnosis of Panel Module

Is a CLK signal input to Pin 12 of IC8501? And are sync signals input to Pins 55 and 57? Is a DE signal input to Pin 58?

YES

Failure in the IC8501

C

NO Is the voltage at Pin 1 of PN2 connector 2.5 V DC? NO Disconnect the cable from the PN2 connector. Check if 2.5V DC is output from Pin 1 of PN2. YES YES Is the voltage at Pin 4 of IC8002 1.5 V DC? YES Is the voltage at Pin 5 of IC8003 1.5 V DC? YES NO Failure in the IC8003 NO Failure in the MAIN PWB NO Failure in the power supply unit, or PN2 cable broken

Failure in the IC8002
D

Waveform 34 NO Failure in the X8001

Is a CLK signal input to Pin 3 of X8001? YES of X8002? YES Failure in the MAIN PWB

Waveform 35 NO
E

Is a CLK signal input to Pin 3

Failure in the X8002

F

PDP-425CMX
5 6 7 8

147