Read Image Data Ng - Oki OKIFAX4550 Maintenance Manual

4.2.3 Read image data NG

3: Read image data NG
Sensor LED is lit
Yes
Input waveform of pin 39
of IC13 is similar to Figure
H.3(2/2) or waveform peak
between 1.6 V and 3.2 V
Yes
Replace IC13.
41309401TH Rev.4
No
5V input to pin 2 of TR5
when the sensor is lit
Replace IC16.
No
Input waveform of pin 3
of IC3 is similar to Figure
H.3(1/2) or waveform peak
between 0.5 V and 2 V
Yes
Replace IC3.
Yes
No
Voltage of pin 3 of TR6
comes down approximately
0.7 V than pin 1 when the
sensor is lit
Yes
Replace TR6.
No
Sensor clock waveform
is similar to Figure H.3(1/2)
(Check with pin 8 of CN5.)
Yes
Yes
Check CN5.
No
Replace TR5.
No
Replace IC13.
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