Okioffice44/Okifax 4100 Confirmation Items - Oki B 4100 Maintenance Manual

5.2.1 OKIOFFICE44/OKIFAX 4100 Confirmation Items

The clock frequency and power voltage of the machine are not possible to adjust in the field.
However, their measurement procedures are described here for confirmation of clock frequency and each
voltage.
1) Clock Frequency
• Measurement point:
• Specification:
Note: If the counter does not read with 20.000 MHz, replace with a new crystal oscillator (X1).
2) +5V DC Voltage (SUB)
• Measurement point:
• Specification:
3) +5V DC Voltage
• Measurement point:
• Specification:
4) –8V DC Voltage
• Measurement point:
• Specification:
5) +30V DC Voltage
• Measurement point:
• Specification:
6) Contact Image Sensor Output (SIG signal)
• Measurement point:
• Specification:
• Test chart:
2.0Vp-p
40055101TH Rev.4
R44 board; LC2-3 pin and ground terminal
20.000 MHz 50 PPM
R44 board; CN7-12 pin and ground terminal
+5V 4% (+4.5V to 5.2V)
R44 board; CN7-1, 2 & 3 pin and ground terminal
+5V 4% (+4.5V to 5.2V)
R44 board; CN7-9 pin and ground terminal
–15V to –6.5V
R44 board; CN7-8 pin and ground terminal
+24V to +45V
R44 board; CN5-1 pin and ground terminal
A waveform sample is shown below.
White sheet (A4 size)
5ms
200 /