Oki OKIOFFICE84, Maintenance Manual

Page: 462 / 519

H - 7 40672201TH Rev. 4
No
Yes
Yes
Yes
Yes
Check CN12. Replace IC2.
Check CN8. Replace IC10.
Yes
Yes
Yes
No
No
Yes
Yes
No
No
IC2 : 111 (HLATCH)
: 112 (HCLCK)
: 113 (HDATA)
No
No
No
6: Printed image data NG
Waveforms of pins 111
through 113 of IC2 are similar
to waveforms in Figures 6-5, 6
Signals of pins 25, 29, 30
of IC2 are similar to Figures
6-2, 3, 4 during printing
Waveforms are similar to
Figure 6-1 are input to pins 2, 5,
12 of IC10 during printing
Replace IC2.
Printed image is All black
or all white
Waveforms of pin 2 and pin
3 are identical when pin 1 of
IC10 is at 5V
Waveforms of pin 5 and pin
6 are identical when pin 4 of
IC10 is at 5V
Waveforms of pin 12 and
pin 11 are identical when pin
13 of IC10 is at 5V
Replace IC2.
Head interface failure
including sector missing
Signals of pins 33, 35 of IC2
change between 0V and 5V
cyclically during printing
Positive after-image provided