Pra-Bd12]: Troubleshooting - Pioneer PRA-BD11 Service Manual

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7.1.9 [PRA-BD12]: TROUBLESHOOTING

1. Failure diagnosis using the LEDs
A
Symptom
The LEDs for checking the power
supply do not light.
• The LED for +5 V power does not light.
B
• The LED for +3.3 V power does not light.
C
• The LED for +2.5 V power does not light.
D
The LEDs for checking operations
do not light.
• In Normal Operation mode, LEDs 1-6
are all unlit.
E
• LED 1 blinks (repeatedly on and off
for 1 second), while LEDs 2-6 are lit.
F
52
1
2
LED Indication
• Check if +5 V power is supplied to TP8611.
• Check if the voltage at TP8613 (soldered part) or TP8603 (checker
chip) is in the range of +4.75 to +5.25 V.
• Check if D8601 (LED) is correctly mounted.
• Check soldering at Q8601 (DTA124EUA).
• Turn the power off then make sure that TP8613 (soldered part) or
TP8603 (checker chip) is not grounded.
• Check soldering at IC8614 (AK4103AVF).
• Check soldering at IC8617 (GS7032).
• Check if the voltage at TP8614 (soldered part) or TP8604 (checker
chip) is in the range of +3.14 to +3.46 V.
• Check if D8602 (LED) is correctly mounted.
• Check soldering at Q8602 (DTA124EUA).
• Turn the power off then make sure that TP8614 (soldered part) or
TP8604 (checker chip) is not grounded.
• Check soldering at IC8602 (BA033FP).
• Check soldering at IC8611 (XC2S50-5PQ208C).
• Check soldering at IC8613 (GS9023A).
• Check soldering at IC8610 (PE9017).
• Check if the voltage at TP8615 (soldered part) or TP8605 (checker
chip) is in the range of +2.38 to +2.62 V.
• Check if D8605 (LED) is correctly mounted.
• Check the soldering at Q8603 (DTA124EUA).
• Turn the power off then make sure that TP8615 (soldered part) or
TP8605 (checker chip) is not grounded.
• Check soldering at IC8601 (BA25BC0FP).
• Check soldering at IC8611 (XC2S50-5PQ208C).
• Check soldering at IC8610 (PE9017).
• Check soldering at IC8611 (XC2S50-5PQ208C).
• Check soldering at IC8612 (TC74VHC541FT, Side B).
• Check if D8612 to D8617 (SML-310PT, LEDs 1-6) are
correctly mounted.
The PRA-BD12 operates in Test mode:
• Make sure that Switch 1 of S8602 (BSH1015, DIP switches) is not
set to ON.
• Check soldering of S8602 (BSH1015, DIP switches).
PRA-BD11
2
3
Check / Measures
3
4
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