Service Tables; Test Point Table; Variable Resistor Table - Ricoh VT1800 Service Manual

SERVICE TABLES

5. SERVICE TABLES

5.1 TEST POINT TABLE

Main PCB
No
TP101 –12 V
TP102 Ink Level (Standard Pulse)
TP103 Ink Level (Detection Pulse)
TP104 GND–b
TP105 +12 V
TP106 +24 V
TP107 4MHz Clock
TP108 +38 V
TP109 +5 V
TP110 GND–a
TP111 Original Registration Sensor
A/D Conversion PCB
No
TP201 OS Signal (CCD Output)
TP202 VS Signal (Inverted and Amplified CCD Output)
TP203 GND
TP204 Scan Line Trigger

5.2 VARIABLE RESISTOR TABLE

Main PCB
No
VR101 Ink Detection Adjustment
VR102 Original Registration Sensor Adjustment
A/D Conversion PCB
No
VR201 White Level Adjustment
Power Supply PCB
No
VR301 Factory Use Only (+5V Adjustment)
VR401 Thermal Head Voltage Adjustment
Usage
Usage
Usage
Usage
Usage
4-12
5 September 1995