Oki OKIPAGE 10ex Troubleshooting Manual page 44

A-11 Serial interface does not connect to the host device.
• Is the voltage waveform between Pins 5 and 6 of the connector (CN2) same as the
waveform shown below?
CH1 +
• Yes
• No
• Has the problem been solved?
• No
40990901TH Rev.1
CH1: DC 5V/div. Normal 5ms/div.
• No Replace the transformer T1.
• Has the problem been solved?
• Yes End.
• No Replace the diode D10.
Is the voltage output at Pin 24 of the connector CN3 +8 VDC?
• Yes Check the connector to the power supply board and main control
board.
Replace the diode D9.
• Yes End.
Replace the capacitors C17 and C18.
T
CH1
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