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Dtt Basic Inspection - Pioneer PDP-42A3HD Service Manual

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1
7.1.3

DTT BASIC INSPECTION

DTT Basic Inspection
Not Working When Powered On
A
Preliminary Checkpoints
Check the condition of the input power &cable connection. (JP709)
Check the condition of on-board regulators.
Check for short circuits between each power terminal and the ground.
B
Check the Digital Board or
SMPS
C
Perform short circuit test on
each power lines.
Check the power line path
from connector
D
to on-board regulators.
Check the soldering status of
on-board regulators.
Perform short circuit test on
each power lines.
E
Note) Please refer to the power diagram of PAU-42THD for detail power connectivity information.
Note) Each input power of DTT comes via the digital board of SMPS directly. So, please check
the digital board prior to SMPS when power input is not working properly.
F
T14
88
1
2
Not Working
When Powered On
OK
NG
Check the voltage output
of JP709 & JP701.
OK
NG
Check the voltage output
of JP709 & JP701 after
connecting them.
OK
NG
Check the input voltage
of on-board regulators
OK
NG
Check the output voltage
of on-board regulators
OK
Check the power line path
from on-board regulators
to each components.
PDP-42A3HD
2
3
*JP 709
1. 3.3V
2. 3.3V
3. 3.3V
4. GND
5. GND
6. GND
7. 2.5V
8. 2.5V
9. 2.5V
10. GND
11. GND
12. GND
3
4
*JP 701
9. A6VCC
10. A6VCC
T14
4

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