Pioneer PDP-434PU Service Manual page 56

1
• Identification of locations having abnormality by the number of times the LEDs flash
On Shutdown and power-down
A
Shutdown
• Operation: When the microcomputer detects any abnormality, it forcibly turns off the unit.
• LED indication: The green LED flashes.
Power-down
• Operation: When the unit is in emergency status, a protection circuit is activated, and the power is turned off.
• LED indication: The red LED flashes.
MR-LED
Category
STB ON
Lit
B
Lit
Lit
Lit
Lit
C
6 times
SD
7 times
8 times
9 times
10 times
D
11 times
12 times
13 times
14 times
1 time
Lit
Lit
E
Lit
Lit
Lit
PD Lit
Lit
Lit
Lit
Lit
Lit
Lit
∗ If the unit cannot identify which protection circuit was activated, even if a power-down had been detected, the red LED may flash 15 times.
F
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2
PANEL-LED
Content
STB ON
Communication failure of the
1 time
panel-drive IC
Communication failure of the
2 times
module IIC
Power decrease of the digital
3 times
DC-DC converter
Panel having high
4 times
temperature
Audio failure
5 times
Communication failure of the
Lit
module microcomputer
Main 3-wire serial
Lit
communication in failure
Communication failure of the
Lit
main IIC
Communication failure of the
Lit
main microcomputer
Lit Fan in failure
MR or unit having higher
Lit
temperature
Communication failure of the
Lit
digital tuner
MR-ASIC power (DC-DC) in
Lit
failure
Communication failure of
Lit
IF-EEPROM
Lit MR power supply
Panel-POWER SUPPLY
2 times
SCAN
3 times
SCAN-5V
4 times
Y-DRIVE
5 times
Y-DCDC
6 times
7 times Y-SUS
ADDRESS
8 times
X-DRIVE
9 times
X-DCDC
10 times
X-SUS
11 times
DIGITAL-DCDC
12 times
UNKNOWN ∗
15 times
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3
Unit's operation
Immediate shutdown
Immediate shutdown
Immediate shutdown
Shutdown 30 seconds
after warning
Shutdown 3 seconds
after warning
Immediate shutdown
Immediate shutdown
Immediate shutdown
Immediate shutdown
Immediate shutdown
Shutdown 30 seconds
after warning
Immediate shutdown
Immediate shutdown
Immediate shutdown
Immediate power-down
Immediate power-down
Immediate power-down
Immediate power-down
Immediate power-down
Immediate power-down
Immediate power-down
Immediate power-down
Immediate power-down
Immediate power-down
Immediate power-down
Immediate power-down
Immediate power-down
PDP-434PU
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4
Warning indication
when the MR is connected
Powering off. Internal temperature too high.
Check temperature around PDP.
Check temperature around media receiver.
[SD04]
Powering off.
Internal protection circuits activated,
Is there a short in speaker cable ?
[SD05]
Powering off. Internal temperature too high.
Check temperature around PDP.
Check temperature around media receiver.
[SD11]
4