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Service Modes, Error Codes, and Fault Finding
EN 17FHP PDP 5.
Figure 5-8 Short circuit check on boards and power supply lines (3/3)
PSU board
Va (63V) exists ?
Y
Connect CN23 (X-SUS) and
CN32 (Y-SUS), and
give the “PDP-go” signal (*1)
Y
the PSU board?
Are Vcc (5V), Vs (85V),
and Va (63V) present on
Logic board, or X-SUS board, or
Y-SUS board is defective
N
PSU board
Va (63V) exists ?
Turn “OFF” AC power.
And remove ADMs from following connectors
CN43, CN44, CD45, CN46
Afterwards give the “PDP-go” signal (*1)
Turn “OFF” the AC power.
Connect CN 47 (ABUS-R)
Give the “PDP-go” signal (*1)
Y
N
End of analysis
N
In case that Vs Power system or Va Power
system of X-SUS or Y-SUS is defective, Vcc
starts but goes down in a few seconds.
Y
N
*
1
When turning “ON” the PDP with PDP-go, refer to following procedure:
1. Connect the special LVDS cable (see paragraph “Repair Tools”)
2. Supply power to the PSU
On PSU board
Vcc (5V), Vs (85V)
exist ?
Turn “OFF” AC power
Connect SDM (with CN34 and CN35)
Give the “PDP-go” signal (*1)
SDM or PDP is defective
Turn “OFF” AC power.
Connect CN 26 (X-SUS)
Give the “PDP-go” signal (*1)
PSU board
Va (63V) exists ?
ABUS-R board is defective
ADM is defective
(PDP is defective)
Turn “OFF” AC power.
And remove ADMs from following connectors
CN53, CN54, CD55, CN56
Afterwards give the “PDP-go” signal (*1)
PSU board
Va (63V) exists ?
ABUS-L board is defective
ADM is defective
(PDP is defective)
Replace defective boards
Y
N
N
Y
G_16400_029.eps
310706
(In case of Logic Board replacement:
Follow the “Logic Board Exchange”
procedure!)
4
between CN01 and CN06