Pioneer PDP-506PE Service Manual page 64

1
• Block diagram of the shutdown signal
A
Note:
The figures 1 - 5 indicate the number of times
the LED flashes when shutdown occurs in the
corresponding route.
HD AUDIO ASSY
IC3751
Amp.
B
IC3754
EEPRON
IC3753
WOW + Volume IC
• Diagnosis of shutdown
Number of SD Circuit in
flashes
Operation
C
Communication
1 time failure of the
driving processor
Communication
failure of the IIC
2 times
line (Check the SD
D
subcategory on
the Factory Menu.)
Power failure of
3 times
the driving
processor (RST2)
E
Abnormally high
4 times
temperature of the
panel
5 times Audio failure
F
64
1
2
A2
5
A_NGB
Reason for
Defective Assy
Shutdown
Communication failure
of IC3401
HD DIGITAL
Writing failure of
IC3401
Communication failure
of the EEPROM (for
HD DIGITAL
retaining 4-Kbyte of data)
Communication failure
of the EEPROM
(2-kbyte : for backup)
HD AUDIO
Disconnection of
connectors
Defective volume IC
Defective DC-DC
converter
HD DIGITAL
Defective RST IC
Defective IC3401
The 8-V power supply
POWER SUPPLY
is not activated.
Abnormally high
temperature of the
panel
Speakers' grounding
fault
HD AUDIO Defective AMP IC
Disconnection of
HD AUDIO
connectors
PDP-506PE
2
3
HD DIGITAL ASSY
IC3401
Sequence Processor
TXD_SQ
RXD_SQ
1
CLK_SQ
CE_SQ
BUSY_SQ
D3
IC3151
Module UCOM
SCL
2
SDA
IC3001 IC3157
TMDS Receiver DAC IC
Point to be Checked
SQ ASIC BLOCK,
PANEL FLASH BLOCK
MODULE UCOM
BLOCK
TMDS BLOCK
AUDIO AMP BLOCK
A2 - D3
HD AUDIO Assy
DIGITAL DD CON
BLOCK
PANEL FLASH BLOCK
SQ ASIC BLOCK
Ambient temperature
Speaker terminals
HD AUDIO Assy
A1 - P5
3
4
IC3302
3.3V-RST
3
IC3303
OR
IC3304
1.2V-RST
RST2
2
IC3156
EEPROM
E_SCL
E_SDA
4
TEMP1
Possible
Remarks
Defective Part
IC3401, IC3301
Check if version data
can be read, using the
"GS1" command, after
the power is turned on
again.
IC3156, IC3157
IC3001
IC3754
Check if the connectors are
disconnected or are not
connected securely.
IC3753
Check if 3.3-V and 1.2-
V power supplies are
U3601
activated.
IC3302 - IC3304
IC3401
Check if the 8-V power
is supplied at Pin 1 of
the D11 connector.
The Panel will be shut
down if the sensor
detects temperature of
75°C or higher (for the
PDP-436P/-506P).
Check if the speaker
cables are in contact
with the chassis, etc.
IC3751
Check if the connectors are
disconnected or are not
connected securely.
4
IC3158
Temp.
Sensor