Panasonic OLED-201806 Technical Manual page 63

Troubleshooting for LED Blinking ( 1 / 2 time blink ) for OLED -3
FZ series
1 time blink
(check of 24V/12V line)
(Power off)
Short check between
SRV-24V and GND.
Shorted
Disconnect CN5 connector
on TCON board. Check if
which board is shorted.
PB(65FZ) / P(55FZ)
Panel Module or
Module
PB5
24V
PB board for 65FZ
PB4
EVDD_ON
Refer to the previous page block diagram.
Power on.
Check if the voltage
of SRV-24V.
OK
Is rise up before LED 1 blink?
NG
PB(65FZ) / P(55FZ)
Module
24V
P3
P board for 55FZ
EVDD_ON
P2
2 time blink
(check of 12V line)
(Power off)
Short check between
SRV-12V and GND.
OK
Shorted
Disconnect the A02 connector.
Check if which board is
shorted
Panel Module or A board
CN11
12V: 7-12pin
CN5
24V: 8-15pin
<A+P+PB>
Power on.
Check if the voltage
of SRV-12V.
OK
Is rise up before LED blink?
OK
Check if the voltage
of EVDD_ON (pin 1 of PB4)
just before LED blink?
OK
(3.3V)
Panel Module
A02
CN11
CN5
T-CON Board
A Board
OLED
NG
A board
NG
SRV-12V
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