Confirmation Items - Oki OKIFAX4550 Maintenance 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
• 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) +24V DC Voltage
• Measurement point:
• Specification:
6) +30V DC Voltage
• Measurement point:
• Specification:
7) Contact Image Sensor Output (SIG signal)
• Measurement point:
• Specification:
• Test chart:
1.0Vp-p
41309401TH Rev.4
46F board; LC3-3 pin and ground terminal
R46 board; IC24-9 pin and ground terminal
20.000 MHz ± 50 PPM
46F/R46 board; CN7-12 pin and ground terminal
+5.2V ± 4%
46F/R46 board; CN7-2 & 3 pin and ground terminal
+5.1V ± 4%
46F/R46 board; CN7-9 pin and ground terminal
-12V to -6.5V
46F/R46 board; CN7-1 pin and ground terminal
+24V ± 5%
46F/R46 board; CN7-8 pin and ground terminal
+26V to +40V
46F/R46 board; CN5-1 pin and ground terminal
A waveform sample is shown below.
White sheet (A4 size)
2.5ms
179 /