Pioneer TRAKTOR PRO CDJ-350, Руководство по обслуживанию

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5.5 ABOUT VOLTAGE MONITORING
The Panel microcomputer of this unit always monitors for power failure of the unit and will shut the unit off immediately after
an error is detected.
The specifications of the terminal of the microcomputer for monitoring are as shown below.
N ame of the terminal of the microcomputer: V DET (Pin 3 of IC501)
• Content to be detected
Power failure generated inside the MAI
N and SMPS Assys
• Terminal voltage
N ormal: 5 V
Abnormal: 0 V
• Timing of monitoring start
0.1 sec after the unit is turned O
N
• Timing for failure judgment
0.5 sec after an error is detected
If an error is generated, the STA N DBY LED will flash after the unit shuts itself off.
After the unit shuts itself off because of an error, unplug the AC power cord and wait 1 minute before turning the unit O N
by pressing the STA N DBY/O N key.
Diagnostic procedure
1
Unplug the AC power cord.
2
Replace R599 on the P N LB Assy with R569.
3
Plug the AC power cord.
4
Turn the unit O N and check each voltage.
*Unplug the AC power cord after several seconds, because power will be forcibly supplied even if any voltage is abnormal.
(If abnormal voltage continues, the defective point may produce heat, which may be dangerous.)
5
If the voltage at any power IC is abnormal, the circuit that is connected to the power IC or the power IC itself may be
defective.
6
Repair the detective part.
7
Replace R569 on the P N LB Assy with R599 (return R599 to its original position).
Specifications of Voltage Monitoring