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PROCBDORB 4
Output Voltage Check
1.
Turn the POWER switch off.
2.
Remove the power supply PCB. (Refer to part 4.8)
3.
Plug the ac adapter into an electrical outlet and the DC IN
l2V jack.
4.
Turn the POWER switch on.
5.
Use a multimeter to confirm that the output voltages for the
three
power
supply PCB
connectors
conform
to
the
values
given in the following table.
6.
If the voltages conform to the values given in the table,
the
power
supply
PCB
is
normal.
System
PCB
is
probably
defective,
go to system PCB
isolation procedures
in part
2.4.
7.
If the voltages do not conform to those given in the table,
go to PROCEDURE 6.
TABLE 2-1 Power Supply PCB Output Voltages
CONNECTOR
PIN NUMBER
VOLTAGE (Vdc)
+
lead
-lead
Normal
Min
Max
PJ 2
1
2
+
5
+
4.75
+
5.25
PJ 4
6
3, 7, 10
+
5
+
4.75
+
5.25
8
3, 7, 10
+
12
+
11.4
+
12.6
9
3, 7, 10
-9
- 10.35
-7.65
12
3, 7, 10
- 22
- 23.1
- 20.9
PJ 5
1
GND
+
5
+
4.5
+
5.5
2
GND
+
5
+
4.75
+
5.25
3
GND
+
12
+
11.4
+
12.6
2-8
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