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Shut Down/power Down Diagnosis By Led Display - Pioneer PDP-503PC Service Manual

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5

7.1.2 SHUT DOWN/POWER DOWN DIAGNOSIS BY LED DISPLAY

When internal circuit abnormality and other operation abnormality occurred from this unit, self-diagnose display function by STANDBY/ON
(LED) indicator is loaded.
Each NG point by LED blinking and a PD (power down) point are as follows.
Shut Down
• Operations : When a microcomputer detected abnormality, turn the power supply to OFF.
• LED display : Green blinks
Examples: LED blinks in the DIGITAL-IIC communication NG
Green LED lights
for 200 msec.
Number of
blinks
1
Panel Microcomputer NG
2
DIGITAL-IIC communication NG
3
Dewdrop abnormality
4
Temperature abnormality
Power Down
• Operations : When this unit becomes the dangerous state, turn the power supply OFF with the protection circuit.
• LED display : Red blinks
* When protection circuit more than two places almost worked simultaneously, display LED in order to 1st - 2nd.
Examples: LED blinks in the 1st power down = Y-DC/DC CONVERTER, 2nd power down = Y-DRIVE
1st power-down information
Red LED lights
for 200 msec.
Number of
blinks
1
Y-DRIVE
2
Y-DC/DC CONVERTER
3
X-DC/DC CONVERTER
4
X-DRIVE
5
Power supply
6
Address junction
7
Address resonance
8
DIGITAL-DC/DC CONVERTER
5
6
Lights out
for 100 msec
Lights out
for 3 sec
Name
How to release the shut down state
When turn the power supply ON by remote control units, release from the
shut down state, and turn the power supply ON.
(It is not necessary to turn the AC power OFF.)
Lights out
Red LED lights
for 100 msec
for 200 msec.
How to release the power down state
Name
AC power OFF
Wait for PD LED in the power supply module disappearing
(for around 30 seconds).
Afterwards, wait moreover for five seconds.
Return by AC power ON.
* After power down release, this unit rises up in the standby state.
6
7
Green LED lights
for 200 msec.
Lights out
for 1 sec
Lights out
for 3 sec
PDP-503PC
7
8
A
B
C
2nd power-down
information
Red LED lights
for 200 msec.
D
E
F
77
8

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