OTHER KINDS OF CONTROL
2-P-4
2 UNIT EXPLANATION
4
[2] Parts That Operate When SW1 (Main Power)/SW2 (Sub Power) is ON
1. Operation
a. Operation performed when SW1 (main
power) is ON
When SW1 (main power) is turned ON, AC
power is supplied to DCPS (DC power supply
unit). As a result, DCPS supplies 5 VDC and 12
VDC to the status management and control cir-
cuit on ICB (image control board), HD-105, and
IP-511. ICB supplies 5 VDC to OB1 (operation
board/1).
b. Operation performed when SW2 (sub power)
is ON
If SW2 (sub power) is turned ON when SW1
(main power) is already ON, DCPS supplies 24
DVC for driving various loads. Thus, all boards
are energized and initialization of this machine
starts.
2. Signals
a. Output signals
(1) REM/2, /3 (ICB to DCPS)
The DC voltage output from DCPS (DC power
supply unit) is controlled according to the com-
bination of levels of two signals.
(2) AC_OFF (IN) (DCPS to ICB)
AC input OFF detection signal (for data evacua-
tion to HDD)
[L]: When AC power is turned ON.
[H]: Until DC power output is stopped after AC
power is turned OFF.
7272ma2020
AC(L)
5VDC
-5VDC
12VDC
5VDC
12VDC
5VDC
-12VDC
12VDC
-12VDC
AC(N)
5V1
12V1
REM/2
REM/3
AC OFF(IN)
RL1
SW1
SW2
DCPS
ICB
IP-511
/IP-511Type-A
HD-105
OB1
L2
L3
REM/2 REM/3 Output
HH
5V1,12V1
LH
5V1,12V1,5V2,12V2,
24V1,-5V1
LL
5V1,12V1,5V2,12V2,
24V1,-5V1,24V2
4
MODEL MANUAL REVISED EDITION DATE PAGE METHOD
SERVICE MANUAL Dec. 2003
7155/7165/7255/7272
2-P-2 REPLACEMENT
4
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