Pioneer KRP-500P Service Manual page 63

5
Checkpoint
Communication line between MDU and SQ_LSI
Drive detectig signal of MDU (SQ_NON)
Communication line between MDU and SQ_LSI (BUSY_SQ)
Check the DIGITAL Assy and the software version of
SEQ and the destination of the panel.
Check the connection between [X1] and [D22].
Check the DIGITAL Assy and the software version of
SEQ and the destination of the panel. Check the
connections between [X1] and [D22], and [SE1] and [D24].
Communication line between MDU and BACKUP EEPROM
Check the DIGITAL Assy and the software version of
SEQ and the destination of the panel. Check the
connections between [X1] and [D22].
Communication line between MDU and DIG EEPROM
Communication line between MDU and DIG EEPROM
Communication line between MDU and BACKUP EEPROM
Communication line between MDU and DAC
3.3 V output (TP3881) of DDC
V+6.5V of POWER SUPPLY Unit (Check [D25][P4])
FU3801 has melted.
Installation environment
Installation environment
Check the connection between [SE1] and [D24].
Speaker terminals
D_AMP
6.5 V power supply for AUDIO Assy
Periphery of the cable between MAIN and AUDIO,
and POWER SUPPLY and AUDIO Assys
D_AMP
Communication line between main ucom and module ucom
Periphery of the cable between MAIN and DIGITAL Assys
Communication line between main ucom and DisplayPort Rx
Communication line between main ucom and PWM processor
Periphery of the 3.3 V regulator for IC
Periphery of the cable between MAIN and AUDIO Assys
Dirt attached to the fan motor
Periphery of the cable between MAIN and FAN Assys
Periphery of the cable between FAN and FAN CH Assys
Periphery of the cable between FAN CH Assy and Fan motor
Periphery of the fan control regulator
Dirt attached to the fan motor
Periphery of the cable between MAIN and FAN Assys
Periphery of the cable between FAN and FAN CH Assys
Periphery of the cable between FAN CH Assy and Fan motor
Periphery of the fan control regulator
Ambient temperature of the panel section and temp. sensor
Periphery of the cable between MAIN and FAN Assys
Periphery of the cable between FAN and SENS Assys
6.5 V power supply of the MAIN Assy
Communication line between main ucom and EEPROM
5
6
Possible Defective
Part
IC3601/IC3301 SQ_IC communication not established. IC3301 may not have properly started up.
CN3201/IC3601/
A shutdown occurs if the drive waveform periodically does not output.
IC3301/IC3607
(When SQ_NON of MDU input is High, a shutdown is generated.)
IC3601/IC3301 If BUSY_SQ remains high, a shutdown is generated.
IC3601/IC3301 When the identification resistor of PSIZE/PLANT and software version of SEQ
are incoherent, a shutdown occurs.
IC3601/ When the identification resistor of PSIZE/PLANT and stored content of
SENSOR Assy(IC3902)
EEPROM on the SENSOR Assy are incoherent, a shutdown occurs.
IC3601/IC3602 When the identification resistor of PSIZE/PLANT and stored content of
EEPROM on the DIGITAL Assy are incoherent, a shutdown occurs.
IC3601/IC3602
IC3601/SENSOR Assy(IC3902)
IC3601/IC3605
IC3801/IC3805 If RST2 does not become high after the unit is turned on, a shutdown will be
generated in several seconds.
POWER SUPPLY Unit,
Check if V + 6_5 V is started. Also check if the FU3801 on the DIGITAL Assy
FU3801
has been melted.
SENSOR Assy If TEMP1 that is read by the module microcomputer is 85 °C or higher, a
(IC3901) shutdown will be generated.
SENSOR Assy If TEMP1 that is read by the module microcomputer is –20 °C or less, a
(IC3901) shutdown will be generated. Also check the connection between SE1 and D24.
JA8551 Check if any speaker cable is in contact with the chassis.
IC8401
Check if the AMP output is short-circuited.
R4203
Check that V+6_5 V is activated in the AUDIO Assy.
If it is not, check if R4203 on the MAIN Assy is open.
CN4201,CN8301, Check if cables are firmly connected.
CN8302
IC8401 Check the temperature of D_AMP IC that is 125 °C or higher.
IC7001,IC3601
Check the communication lines (TXD_MD/RXD_MD/REQ_MD).
CN4002,CN3201
Check if cables are firmly connected.
IC7001,IC5001 Check the communication lines (SCL_DP/SDA_DP).
IC7001,IC8341 Check the communication lines (SCL_AV/SDA_AV).
IC8331 Check that the voltage outputs it.
CN4201,CN8301 Check if cables are firmly connected.
Check the fan. (SD10 does not detect it at the temperature that fans do not turn.)
CN4101,CN1201
Check if cables are firmly connected.
CN1202,CN3304 Check if cables are firmly connected.
CN3302 Check if cables are firmly connected.
IC1202 Check that the voltage outputs it.
Check the fan. (SD10 does not detect it at the temperature that fans do not turn.)
CN4101,CN1201 Check if cables are firmly connected.
CN1202,CN3304
Check if cables are firmly connected.
CN3301 Check if cables are firmly connected.
IC1201 Check that the voltage outputs it.
IC1203 Shutdown occurs if the periphery of IC1203 (temp. sensor) is high temperature.
CN4101,CN1201 Check if cables are firmly connected.
CN1203,CN2401 Check if cables are firmly connected.
CN4502
Check if V + 6_5 V is started.
IC7001, IC7003 Check the communcation lines (SCL_E2P/SDA_E2P)
KRP-500P
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7
Remarks
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8
A
B
C
D
E
F
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