Oki B4100 - Manual (Page 200)

40055101TH Rev.4 200 /
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: R44 board; LC2-3 pin and ground terminal
• Specification: 20.000 MHz
±
50 PPM
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: R44 board; CN7-12 pin and ground terminal
• Specification: +5V
±
4% (+4.5V to 5.2V)
3) +5V DC Voltage
• Measurement point: R44 board; CN7-1, 2 & 3 pin and ground terminal
• Specification: +5V
±
4% (+4.5V to 5.2V)
4) –8V DC Voltage
• Measurement point: R44 board; CN7-9 pin and ground terminal
• Specification: –15V to –6.5V
5) +30V DC Voltage
• Measurement point: R44 board; CN7-8 pin and ground terminal
• Specification: +24V to +45V
6) Contact Image Sensor Output (SIG signal)
• Measurement point: R44 board; CN5-1 pin and ground terminal
• Specification: A waveform sample is shown below.
• Test chart: White sheet (A4 size)
2.0Vp-p
5ms