Audio Board Caution - Pioneer PDP4360HD Product Training Manual

- Attention point for repair
Since G6 Audio IC is BLT type of Power IC as same as G4 and G5 Audio IC,
both of spe ker outputs ( plus and minus ) always have about 7 V DC.
Therefore do not short between spe ker minus and GND like the following figure.
Otherwise Power IC or a measuring equipment may have damege.
CH1
Measuring
point
GND
Example of error measurement
( GND and SP OUT " - " are shorted onto measuring instrument. )
- Assumed Power Down and Shut Dowon caused by AUDIO Assy
able
error including VOL IC defective.
circuit at SP output.
Short circuit between Power line (16.5 V ) - GND
( In case of power on operation during the problem has occurred )
Short circuit between Power line (16.5 V ) - GND
( During normal operation )
Short circuit between power line (+3.3V_D)- GND
( During normal operation )
Short circuit between power line (+3.3V_D)- GND
( In case of power on operation during the problem has occurred )
The above number of PD and SD are not always the reasons in the above list
NOTE:
CH2
LA4625
Main reason of PD or SD
( A2<-> D3) or IIC communication
( A1<-> P5 ) or working DC
Both of ＳＰ OUT+ and -
have about 7V
+
-
Number of PD / SD
SD （Blue 2 times ）
SD （Blue 5 times )
PD (Red 2 times ）
PD (Red 4 times ）
PD ( Red 13 times）
SD ( Blue 3 times )
37