PIONEER PDP-42A3HD - PDP-4214HD - FAULTS & SYMPTOMS - [2 of 2]

         
                                                                 [2 of 2]
POWER OFF
Symptom: No Picture (Priming doesn't flash)  >  Power off.

Cause | Countermeasure:

• F301 open à Exchange High Voltage Board.
• FU801 open à Exchange Digital Board.

Cause | Countermeasure :

• If short-circuited, disconnect connector between High Voltage Board and Scan Relay Board and,
• Short between NEGA-POSI on High Voltage Board  à Exchange High Voltage Board.
• Short between NEGA-POSI on Scan Relay Board (U) à Exchange Scan Relay Board (U).
• Short between NEGA-POSI on Scan Relay Board (D) à Exchange Scan Relay Board (D).

• Symptom: No Picture à Power off (Priming flash).
• Cause | Countermeasure: R91 open à  Exchange High Voltage Board.

Symptom: Failure in Writing  à Power off.

DARK AND ROUGH PICTURE

MANY LIGHT SPOTS ON DARK PORTION

WHITE PATTERN EVEN IN NO SIGNAL -- POWER OFF

Cause | Countermeasure: 

• R43,R61 open à Exchange High Voltage Board.
• R150 open  à  Exchange High Voltage Board.