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Troubleshooting for LED Blinking ( 1 time blink )
Ex. 43/49DS630** series
Refer to the previous page block diagram.
(Power off)
Disconnect LD1 and LD2
connectors. Short check between
pin8,9 of LD1 and GND,
pin1,5 of LD2 and GND.
NG
LD board
(*)VLED : The DC level is different by the LCD panel.
Connect LD1 and LD2
connectors. Power on.
Check if the voltage
of SRV-VLED1, VLED2 (pin 3 , 7
ALL OK
of LD2) before LED 1 blink?
Short check between SRV-
VLED1, VLED2 and GND
Panel Module
Both OK
58V(*),
88V(*)
NG
of SRV-VLED (pin 9 of LD1)
OK
Shorted
<A+P+LD/LDP> -2
Panel Module
Power on.
OK
Check if the voltage
32V(*)
before LED 1 blink?
NG
P board
LD board
55
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