Toshiba T1200 - Procedure 4: Output Voltage Check

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