Pioneer PDP-5020FD Service Manual page 79

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*1: If the DISPLAY key is pressed during shutdown (the blue LED is flashing), flashing of the orange LED, which indicates the subcategory, can be confirmed.
The blue LED remains flashing. Pressing the DISPLAY key again will make the orange LED go dark.
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
Periphery of the cable between IO3 and M12, and
IO4 and M13
D_AMP
Communication line between MAIN and MOD
Periphery of the cable between D11 and M12
Communication line between IF and MAIN
Communication line between MULTI and MAIN
IIC communication line between Tuner and MAIN
IIC communication line between MSP/MAP and MAIN
IIC communication line between AV-SW and MAIN
IIC communication line between RGB_SW and MAIN
IIC communication line between M_VDEC and MAIN
IIC communication line between VDEC and SDRAM
IIC communication line between ADC and MAIN
IIC communication line between HDMI_RX and MAIN
IIC communication line between US_MSP and MAIN
Communication line between IF and MAIN
Dirt attached to the fan motor
Periphery of the FAN CONNECT Assy
Periphery of the cable between FA1 and FA3
Periphery of the fan control regulator
Ambient temperature
Temperature sensor or its periphery
Periphery of the cable between IO4 and M13
Startup of BCM7404
Communication line between BCM7404 and MAIN
Periphery of BCM7404
Front-end block
DTV application
DEMOD
RST2 V+3_4V_ACT2, V+3_3V_D3
RST4 V+12V, V+6_5V, V+5_1V, V+3_4V_D
RST4 V+12V, V+6_5V, V+5_1V, V+3_4V_D
Check the cables M2 and M3.
IIC communication line between EEPROM and MAIN
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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 A shutdown occurs if the reading of TEMP1 detected by the module micro-
(IC3901) computer is –20 °C or less. 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.
CN7503,CN7504,
Check if cables are firmly connected.
CN4003,CN4004
IC8401 Check the temperature that is 125 °C or less.
IC7003 Check the communication lines (TXD_MOD/RXD_MOD).
CN4101,CN4105 Check if cables are firmly connected.
IC7003,IC6501
Check the communication lines (TXD_IF/RXD_IF/CLK_IF/BUSY_IF/CE_IF/REQ_IF).
IC7003,IC6501 Check the communication lines (TXD_ARIA/RXD_ARIA).
U5301,IC7003 Check the communication lines (SCL_TU/SDA_TU or SCL_AV/SDA_AV).
IC8201,IC7003 Check the communication lines (SCL_AV/SDA_AV).
IC8001,IC7003 Check the communication lines (SCL_AV5/SDA_AV5).
IC8101,IC7003 Check the communication lines (SCL_AV5/SDA_AV5).
IC4702,IC7003 Check the communication lines (SCL_MB/SDA_MB).
IC4702,IC4802
Check the communication lines (SDRAM). Defective SDRAM
IC4801,IC7003 Check the communication lines (SCL_AV/SDA_AV).
IC4901,IC7003 Check the communication lines (SCL_MB/SDA_MB).
IC5301,IC7003 Check the communication lines (SCL_AV/SDA_AV).
IC6811,IC7003 Check the communication lines (TXD_IF/RXD_IF/CLK_IF/BUSY_IF/CE_IF/REQ_IF).
Check the fan. (SD10 does not detect it at the temperature that fans do not turn.)
FAN NG
Check if cables are firmly connected.
IC4303 Check that the voltage outputs it.
TEMP2 A shutdown occurs because of high temperature.
TH7891 TEMP2
CN7504,CN4004 Check if cables are firmly connected.
IC6001
Check the startup of the BCM7404 and the communication line with MAIN.
IC6001 Check the startup of the BCM7404 and the communication line with MAIN.
IC6001
IC6001,U5301 Check the BCM7404 and its periphery device.
IC6001
IC6001,IC5501 Check the communication line between BCM7404 and DEMOD.
IC7002 Check if each voltages are started.
IC7002
Check if each voltages are started.
POWER SUPPLY Unit Check if each voltages are started.
CN4207, CN4210 Check if cables are firmly connected.
IC7004, IC7003 Check the communcation lines (SCL_EP/SDA_EP)
PDP-5020FD
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Remarks
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A
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