Pioneer PDP-5010FD

PDP-5010FD
53
5678
56
7
8
C
D
F
A
B
E
5.2.5 MAIN ASSY
Flowchart of Failure Analysis for The MAIN Assy
Failure in the RST IC (IC8302) output or its peripheral circuits
No
Replace the MAIN Assy.
No
Turn the POWER switch on.
The STB LED does not light although
STB 3.3 V power is supplied.
Does the POWER switch on?
No
Is the M11 connector securely
connected?
Securely connect the M11 connector.
Ye s
Ye s
Is the cable that is connected to
the M11 connector broken?
Replace the cable (J115).
No
No
No
No
No
No
The RELAY port does not work.
The power is not turned on.
Is voltage at REQ_IF on the MAIN
Assy High (3.3 V)?
Can the unit be turned on, using
the remote control unit?
Can the unit be turned on, using
the Power switch on the unit?
Can the unit be turned on, using
RS-232C commands?
Ye s
Ye s
Is resetting of the IF
microcomputer canceled?
Failure in the line between the IF microcomputer and M11 connector
Failure in the RS-232C driver and its
peripheral circuits
Failure in the Main microcomputer.
No
Replace the MAIN Assy.
Ye s
Is the voltage at Pin 3 of the M11
connector High?
Relay control is unable unless it supplies a power supply to the module microcompute.
No
Replace the MAIN Assy.
No
Turn the POWER switch on.
Does the POWER switch on?
Ye s
Ye s
Is the voltage at Pin 3 of the M1
connector 3.3 V?
• Failure in the output of REG IC (IC4501).
• Is active low?
No
Replace the MAIN Assy.
Ye s
Are the voltages (3.3 V/2.5 V/1.5 V)
supplied to the main microcomputer?
No problem with the MAIN Assy.
Check the LED Assy.
No
Ye s
Ye s
Ye s
Replace the cable that connects
between the IR and MAIN Assys.
Replace the cable that connects
between the SIDE KEY and MAIN Assys.
Replace the IR Assy.
Replace the SIDE KEY Assy.
Replace the MAIN Assy.
Replace the MAIN Assy.
Replace the MAIN Assy.
Replace the MAIN Assy.
No
No
Failure analysis for the
MAIN Assy => MA1
Failure analysis for the
MAIN Assy => MA2