Ricoh Aficio IS420 Service Manual page 50

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SERVICE LEVEL FUNCTIONS
PCBs
4.2. PCBs
SCU
LED1
+5V
LED2
+5VG
SDU
F2
1.25A, 250V
JP1
Do not change the position of this jumper.
MBU
LED1
+24V
LED2
+5V
LED3
+12V
LED4
-5V
SBU
VR1 to VR4 See Appendix B: Electrical Adjustments
4.3. SPECIAL TOOLS
Part Number
G4049000
G4049002
G4049001
A0129110
G4049003
G4049005
G4049004
G4049006
H2039114
G4043102
SW1
SW2
SW3
TP1
TP2
F1, F2
Part Name
Scanner Positioning Tool (2 pcs/set)
Optical Adjustment Harness (Jig Harness)
Optical Adjustment Glass (Jig Glass)
Resolution Chart
RS-13 Chart (A5)
RS-13 Chart (A4)
RS-13 Chart (A3, 55 kg)
RS-13 Chart (A3, 90 kg)
RS-12 Chart (A3)
White Sheet
4-6
October 9th, 1995
Reset Switch
DIP Switches
SCSI Rotary Switch
COM
PHSH (base CCD clock)
5A, 250V

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