Hitachi P50H401/DW3, Service Manual

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● PDP panel self-diagnosis function
This function is for a PDP module failure with no picture.
To use this Self-Diagnosis function, follow the next steps:
Procedure:
1) When the PDP module has some trouble, it generates blue blinking series of the power indicator light.
2) The next table shows the PDP PWB in which failure most probably would be allocated according to the number of blinks.
Number of red blinks Presumed failing PWB
of power indication light of PDP panel
1 Logic
2 X-SUS
3 Y-SUS, SDM SDM: Scan Driver Module
4 X-SUS, Y-SUS, SDM, PSU PSU: Power Supply Unit
5 ABUS, ADM, PSU ABUS: Address Bus Module
6 ADM ADM: Address Driver Module
7 ADM
8 All of above-mentioned
PWB’s
Note) SDM is permanently contacted to glass part.
[Blinking condition of power indication light]
Ex. 2 blinks
① ② ① ②
1 sec 1 sec 2 sec OFF Repeat
DW
3
U
TROUBLESHOOTING FLOW CHARTS