40055101TH Rev.4 202 /5.3.1 OKIFAX 5000 Series Confirmation ItemsThe 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 eachvoltage.1) Clock Frequency• Measurement point: M17 board; LC2-3 pin and ground terminal• Specification: 20.000 MHz ± 50 PPMNote: If the counter does not read with 20.000 MHz, replace with a new crystal oscillator (X1).2) +5V DC Voltage (SUB)• Measurement point: M17 board; CN16-1 pin and ground terminal• Specification: +5V ± 4% (+4.5V to 5.2V)3) +5V DC Voltage• Measurement point: M17 board; CN1-B12/A13/B13 pin and ground terminal• Specification: +5V ± 4% (+4.5V to 5.2V)4) +8V DC Voltage• Measurement point: M17 board; CN1-A14 pin and ground terminal• Specification: +6.5V to 15V5) –8V DC Voltage• Measurement point: M17 board; CN1-B14 pin and ground terminal• Specification: –15V to –6.5V6) +30V DC Voltage• Measurement point: M17 board; CN1-A15/B15 pin and ground terminal• Specification: +24V to +45V7) Contact Image Sensor Output (SIG signal)• Measurement point: M17 board; CN10-1 pin and ground terminal• Specification: A waveform sample is shown below.• Test chart: White sheet (A4 size)1.0Vp-p2.5ms
