Hitachi P50H401/DW3 Service Manual page 59

TROUBLESHOOTING FLOW CHARTS
● 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
of power indication light
1
2
3
4
5
6
7
8
[Blinking condition of power indication light]
Ex. 2 blinks
①
1 sec
Presumed failing PWB
of PDP panel
Logic
X-SUS
Y-SUS, SDM
X-SUS, Y-SUS, SDM, PSU
ABUS, ADM, PSU
ADM
ADM
All of above-mentioned
PWB's
②
1 sec 2 sec OFF
58
SDM: Scan Driver Module
PSU: Power Supply Unit
ABUS: Address Bus Module
ADM: Address Driver Module
Note) SDM is permanently contacted to glass part.
① ②
Repeat
DW3U