Interlock Switches; Jumpers, Switches, And Test Points; Psu - Ricoh FAX3700l Service Manual

DETAILED SECTION DESCRIPTIONS
PCBs

6. Interlock Switches

•
The fusing unit interlock switch (+24V) disables the power supply to the
drive components and the power pack.
•
The fusing unit interlock switch (+5V) disables the laser diode power.

7. Jumpers, Switches, and Test Points

Item
TP1 COM2 ground
TP2 COM1 ground
TP3 +5VE
TP4 -5V
TP7 Laser synchronization signal
TP6 Scanner clock
TP8 Scanner clock
TP9 Analog video signal input from the Contact Image Sensor
CN40-1 Analog video signal
CN40-2 Scanner clock
CN40-3 Synchronization signal
CN40-4 COM1 ground
TB1 Switches the power supply to the flash ROM boot block on the FCE
1-2 pins shorted: +12V (the boot block can be overwritten)
2-3 pins shorted: +5V (the boot block cannot be overwritten)
Warning: Do not change this jumper setting, unless the boot block in
the Flash ROM needs to be overwritten by Function 12.
(Refer to Chapter 4.1.20 for more details.)

2.4.3. PSU

Main Switch
F1
ACL
AC Input
ACN
Surge Surge
Protection Protection
GND
Fusing Lamp Output
HTL
HTN
•
+24Vdc generation
•
Fusing lamp ac power supply and control.
F2
PSU
Phase
Control
2-62
Description
Switching
Circuit
August 2nd, 1995
+24V
Interlock
COM3
Switch
+24VM
1HTORON
1HTON
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