Pioneer PRA-BD11 Service Manual page 36

1
5. Points to check during servicing
A Checker chips are provided for various power supplies, ground, and clock signals for easier measuring with an oscilloscope
using a probe.
A
DINB ASSY
TP8286
TP8287
TP8288
B
C
Points to check
Pin No.
Signal Name
D
TP8483
TP8484
GNDD
TP8485
TP8486
TP8482 +2VD
TP8480 +3VD
TP8479 +5VD
TP8481 +5VA
E
F
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1
2
Description
Ground
2.5V power supply for the digital system
3.3V power supply for the digital system
5.0V power supply for the digital system
5.0V power supply for the analog system
2
3
Pin No.
Signal Name
CLK_27M
TP8284
SDI_SEL
TP8285 27M_GEN
PRA-BD11
3
4
SIDE A
Description
27MHz signal reproduced from the SDI
signal, or when there is no signal input, a
return signal of the 27MHz signal from
the PRV-LX1 (Measurement must be
conducted when the PRV-LX1 is
connected with the PRA-BD11)
Built-in 27MHz clock generator
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