Checkpoint
Possible Defective
Part
Remarks
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
IC3601/IC3301
CN3201/IC3601/
IC3301/IC3607
IC3601/IC3301
IC3601/IC3301
IC3601/
SENSOR Assy(IC3902)
IC3601/IC3602
IC3601/IC3602
IC3601/SENSOR Assy(IC3902)
IC3601/IC3605
IC3801/IC3805
POWER SUPPLY Unit,
FU3801
SENSOR Assy
(IC3901)
SENSOR Assy
(IC3901)
JA8551
IC8401
R4203
CN4201,CN8301,
CN8302
IC8401
IC7001,IC3601
CN4002,CN3201
IC7001,IC5001
IC7001,IC8341
IC8331
CN4201,CN8301
CN4101,CN1201
CN1202,CN3304
CN3302
IC1202
CN4101,CN1201
CN1202,CN3304
CN3301
IC1201
IC1203
CN4101,CN1201
CN1203,CN2401
CN4502
IC7001, IC7003
SQ_IC communication not established. IC3301 may not have properly started up.
A shutdown occurs if the drive waveform periodically does not output.
(When SQ_NON of MDU input is High, a shutdown is generated.)
If BUSY_SQ remains high, a shutdown is generated.
When the identification resistor of PSIZE/PLANT and software version of SEQ
are incoherent, a shutdown occurs.
When the identification resistor of PSIZE/PLANT and stored content of
EEPROM on the SENSOR Assy are incoherent, a shutdown occurs.
When the identification resistor of PSIZE/PLANT and stored content of
EEPROM on the DIGITAL Assy are incoherent, a shutdown occurs.
If RST2 does not become high after the unit is turned on, a shutdown will be
generated in several seconds.
Check if V + 6_5 V is started. Also check if the FU3801 on the DIGITAL Assy
has been melted.
If TEMP1 that is read by the module microcomputer is 85 °C or higher, a
shutdown will be generated.
If TEMP1 that is read by the module microcomputer is –20 °C or less, a
shutdown will be generated. Also check the connection between SE1 and D24.
Check if any speaker cable is in contact with the chassis.
Check if the AMP output is short-circuited.
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.
Check if cables are firmly connected.
Check the temperature of D_AMP IC that is 125 °C or higher.
Check the communication lines (TXD_MD/RXD_MD/REQ_MD).
Check if cables are firmly connected.
Check the communication lines (SCL_DP/SDA_DP).
Check the communication lines (SCL_AV/SDA_AV).
Check that the voltage outputs it.
Check if cables are firmly connected.
Check the fan.
(SD10 does not detect it at the temperature that fans do not turn.)
Check if cables are firmly connected.
Check if cables are firmly connected.
Check if cables are firmly connected.
Check that the voltage outputs it.
Check the fan.
(SD10 does not detect it at the temperature that fans do not turn.)
Check if cables are firmly connected.
Check if cables are firmly connected.
Check if cables are firmly connected.
Check that the voltage outputs it.
Shutdown occurs if the periphery of IC1203 (temp. sensor) is high temperature.
Check if cables are firmly connected.
Check if cables are firmly connected.
Check if V + 6_5 V is started.
Check the communcation lines (SCL_E2P/SDA_E2P)
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