Pioneer KRP-500P Service Manual page 44

1
A
Power-On-Related Problems
When the MR is replaced, is the
problem resolved?
No
B
Is the relay port of the connector (Pin 13 of
CN4501) between the Display MAIN Assy
and Display POWER SUPPLY Unit high
(3.4 V)?
Yes
[SM for the Display]
Failure analysis of the Display POWER SUPPLY Unit => PP2
PD/SD-Related Problems
C
The red LED on the Display
flashes.
The red LED on the MR flashes.
The blue LED on the Display
flashes.
D
The blue LED on the MR flashes.
System-Connection-Related Problems
On the Display, the red and blue
LEDs alternately flash.
On the MR, lit in red LED.
E
When the system cable is replaced,
is the problem resolved?
No
When the MR is replaced,
is the problem resolved?
No
Failure in IC5001 or its peripheral circuits.
Replace the Display MAIN Assy.
F
44
1
2
Is the relay port of the connector (Pin 25 of
Yes
CN4203) between the MR MAIN BLOCK
Assy and MR POWER SUPPLY Unit high
(3.4 V)?
Yes
[SM for the MR]
Failure analysis of the MR POWER SUPPLY Unit => PS2
No
[SM for the Display]
Failure analysis of the Display MAIN Assy => PM2
[SM for the Display]
See "5.3 DIAGNOSIS OF PD (POWER-DOWN)."
[SM for the MR]
See "5.3 DIAGNOSIS OF PD (POWER-DOWN)."
[SM for the Display]
See "5.4 DIAGNOSIS OF SD (SHUTDOWN)."
[SM for the MR]
See "5.4 DIAGNOSIS OF SD (SHUTDOWN)."
Note:
Only when the system is powered in response to the POWER key on the remote control unit
and if it is in trouble do the LEDs flash in this way. If the units are turned on with their POWER
keys or with the RS-232C command, even if the system is in failure, the red LEDs on the display
and the MR light.
Yes
Replace the system cable.
Yes
Failure in IC7602 or its peripheral circuits.
Replace the MR MAIN BLOCK Assy.
KRP-500P
2
3
No
[SM for the MR]
Failure analysis of the MR MAIN BLOCK Assy => MA2
Power-down will not be activated if the drive is off.
3
4
4