P-35B
The DM Circuit Board is provided with test points for service check purposes.
Check the test points on the DM Circuit Board if the following symptoms appear.
Symptoms and check items
1. No light with Power SW ON
--> Check
items
②
to
④
sequentially
2. No sound or distorted sound
--> Check
items
①
,
⑥
and
⑦
, and OUTPUT check items.
OUTPUT
Note: Use the standard AC adapter PA-150A or PA-150U for check operation.
Note: “O” mark expresses normalcy and “X” mark expresses a failed state.
DM Circuit Board (WZ912400)
TEST POINT
NO.
SPEAKER OUTPUT
PHONES/
OUTPUT
DAC-L/R
TEST POINT
Parts with Possible Defects
1
X
X
X
IC100
2
O
X
X
IC301
3
X
O
O
IC302 or HP JACK
4
O
X
O
IC303
NO.
Test Point
Circuit
Judgment Criteria
Measured by
Parts with Possible Defects
①
+12V
Power supply for
More than 10.0V
Multimeter
TR502
DM Circuit Board
(On JK Circuit Board)
②
+HP
Power supply for
More than 10.9V
Multimeter
TR102
Headphone Circuit
③
+3.3D
3.3V power for
3.3V ±0.3V
Multimeter
IC101
digital circuit
④
+1.8D
1.8V power for
1.8V ±0.1V
Multimeter
IC102
digital circuit
⑤
/RESET
CPU and Memory
3.3V ±0.3V
Multimeter
IC106
reset signal
⑥
DAC-L
DAC output
There shall be audio output
Signal checker
IC301 or IC100
L channel
without distortion
⑦
DAC-R
DAC output
There shall be audio output
Signal checker
IC301 or IC100
R channel
without distortion
①
②
⑥
⑦
④
③
⑤
P-105B/P-105WH/P-35B/L-85WH/LP-5AWH
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