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Troubleshooting for LED Blinking ( 1 time blink )
Ex. DX900** series
Refer to the previous page block diagram.
Power on.
Check if the voltage
of SRV-VLED1(pin17-28 of PB1)
and SRV-VLED2 (pin17-28 of
PB2) before LED 1 blink?
NG
(Power off) Disconnect
PB1 and PB2 connector.
Short check between SRV-
VLED1, VLED2 and GND
Shorted
PB Module
(*)VLED : The DC level is different by the LCD panel.
Both OK
Panel Module
58V(*),
88V(*)
Check if the voltage
of SRV-BL-ON (pin 5 of PB1)
OK
before LED 1 blink?
NG
Check if the voltage
of BL_ON (pin 15 of A03)
before LED 1 blink?
NG
A board
OK
Panel Module
3.3V
OK
Panel Module
3.3V
<A+P+PB> -2
57
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