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VOLTAGE OF EACH CONNECTOR
• Voltage measurement in protect mode
Because the relay signal is "L" in the protect mode, voltages of Vcc, Vs, and Va are not output. The
protect mode is reset only when the power SW is turned off. Therefore, when measuring the voltage,
turn off the power SW, then turn on the power by remote control. Remeasure the power supply unit
protection operation.
• Relay signal
Voltages Vcc, Vs and Va are output only when the relay signal of "CN103-3" is "H".
When the microcomputer detects an abnormal voltage, these voltages are not output.
• ACON signal
The ACON signal indicates whether or not AC is supplied. The relay signal is output when the ACON
signal is "H".
1. Power Supply Unit
CN103
Power supply unit
No.
NAME
1
Vpr
7
Vcc 2
CN42
Power supply unit
No.
NAME
3
Vsc
4
-Vy
6
Vcc 1
2. DC/DC Power PCB
(PFW-422)
Ground
SPEC.
w
5V (4.8 to 5.2V)
w
24V (23.7 to 24.3V)
Ground
SPEC.
r
116.4 to 123.6V
q
-150 to -170V
q
5V (4.8 to 5.2V)
P503
DC/DC Power PCB
No.
NAME
2
A 5V
4
14 V
5
Vpr
8
D 5V
9
D 3.3V
10
A-5V
CN49
Power supply unit
No.
NAME
1
Vcc 1
3
Ve
10
Vs
CN50
Power supply unit
No.
NAME
1
Vw
2
Va
Ground
SPEC.
5V (4.75 to5.25V)
13.3 to 14.7V
5V (4.8 to 5.2V)
5V (4.75 to 5.25V)
3.2 to 3.4V
-5.25 to -4.75V
– 19 –
Ground
SPEC.
5V (4.8 to 5.2V)
15.52 to 16.48V
165.0 to 185.0V
Ground
SPEC.
164.9 to 175.1V
64.35 to 65.65V
q
q
q
q
q
q
w
w
w
e
e
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