Pioneer f-502 Service Manual page 77

Shut Down (Blinking in Blue)
HD AUDIO ASSY
IC3751
Amp.
IC3754
EEPRON
IC3753
WOW + Volume IC
Number of SD Circuit in
flashes
Operation
Communication
1 time failure of the HD DIGITAL
driving processor
HD DIGITAL
Communication
failure of the IIC
2 times
line (Check the SD
subcategory on
HD AUDIO
the Factory Menu.)
HD DIGITAL
Power failure of
3 times
the driving
processor (RST2)
POWER SUPPLY The 8-V power supply
Abnormally high
4 times
temperature of the
panel
5 times Audio failure
HD AUDIO
HD AUDIO
PDP436PU, PDP506PU, PRO436PU, PRO506PU
A2
5
A_NGB
Reason for
Defective Assy
Shutdown
Communication failure
of IC3401
Writing failure of
IC3401
Communication failure
of the EEPROM (for
retaining 4-Kbyte of data)
Communication failure
of the EEPROM
(2-kbyte : for backup)
Disconnection of
connectors
Defective volume IC
Defective DC-DC
converter
Defective RST IC
Defective IC3401
is not activated.
Abnormally high
temperature of the
panel
Speakers' grounding
fault
Defective AMP IC
Disconnection of
connectors
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
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.
IC3158
Temp.
Sensor