Pioneer XV-BD122B, Руководство по обслуживанию, Страница: 12 / 85

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XV-BD422B
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5. DIAGNOSIS
5.1 TROUBLESHOOTING
No power
No power
Which Power button, the one on
the remote control unit or on
the main unit, is disabled?
Is there 5 V on pins 5
and 6, 12 V on pin 3 of XP1
of MAIN BOARD Assy?
No
Check for any abnormality with the connection and connectors that connect the
POWER BOARD Assy and MAIN BOARD Assy.
If there is no abnormality:
· If neither 5 V nor 12 V are output, go to the flowchart for "Neither 5 V nor 12 V are output."
· If only 5 V is not output, go to the flowchart for "+5 V power is not output."
· If only 12 V is not output, go to the flowchart for "+12 V power is not output."
Check for any abnormality with the connection and connectors that connect the MAIN
BOARD Assy and FRONT BOARD Assy.
If there is no abnormality, replace the MAIN BOARD Assy.
To the flowchart for "The remote
control unit does not function"
Only the Power button
of the remote control unit
Both, or the Power button
of the main unit
Yes
Is there 3.3 V on pin 9,
12 V on pin 7 of XP3
of FRONT BOARD Assy?
No
Yes
Replace S608.
If replacement does not resolve the problem, replace the FRONT BOARD Assy.
1. Perform a conduction test, using a tester, with the main unit turned OFF.
2. Check the waveform at Pin 3 (KEY_POW) of the XP13 on the MAIN BOARD Assy.
With SW1 OFF: 3.3 V, With SW1 ON: 0 V
Checking of S608
Does S608 on the
FRONT BOARD Assy
function properly?
No
Yes
Replace the MAIN BOARD Assy.
Waveform of KEY_POW
3.3 V
0 V
Neither 5 V nor 12 V are outpu
Yes
Neither 5 V nor 12 V are output
Is the AC input voltage
normal?
Is the voltage of CE501
between 310 V to 390 V?
No
Check the connection of CN501
on the POWER BOARD Assy.
No
Chek the soldering of BD501 and
F501 are normal.
Yes
Is the voltage of CE505
between 5.8 V to 6.4 V?
No
Chek the soldering of D506 and
ZD502 are normal.
Yes
Replace the POWER BOARD
Assy.
Replace the POWER BOARD
Assy.
Replace the POWER BOARD
Assy.
+5 V power is not output
Yes
+5 V power is not output
Is the voltage of CE509
+5 V?
No
Chek the soldering of D509 and
D510 are normal.
+12 V power is not output
Yes
+12 V power is not output
Is the voltage of CE506
+12 V?
No
Chek the soldering of D508 is
normal.