Confirmation Items - Oki OF5700 Service Manual

5.2.1 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
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Measurement point: R76 board; R180-2 pin and ground terminal
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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)
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Measurement point: R76 board; CN1-A8 pin and ground terminal
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Specification: +5.2V ± 4%
3) +5V DC Voltage
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Measurement point: R76 board; CN1-B10, A11, B11 and A12 pin and ground terminal
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Specification: +5.1V ± 4%
4) +8V DC Voltage
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Measurement point: R76 board CN1-A16 pin and ground terminal
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Specification: +8V ±4%
5) -8V DC Voltage
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Measurement point: R76 board; CN1-B15 pin and ground terminal
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Specification: -8V ±4%
6) +24V DC Voltage
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Measurement point: R76 board; CN1-B6 pin and ground terminal
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Specification: 22V to 27V
7) +38V DC Voltage
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Measurement point: R76 board; CN1-B12, A13 and B13 pin and ground terminal
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Specification: +26V to +45V
8) Contact Image Sensor Output (SIG signal)
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Measurement point: R76 board; CN13-1 pin and ground terminal
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Specification: A waveform sample is shown below.
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Test chart: White sheet (A4 size)
Service Guide OKIFAX 5700/5900
Chapter 5 Adjustments
Page: 197