1.4 Document Drive RAP
The purpose of this RAP is to isolate faults in the document drive
system. The BSDs 4.1,4.2, and 5.1 (Section 7) contain useful
Information.
Initial Actions
Ensure that the Scanner and the controlling system are ready.
Procedure
Alternately press the FORWARD Switch at least 10 times.
• If the Document Drive Rolls operate erratically (sometimes forward,
sometimes reverse, sometimes not at all), the Motor has an internal
fault or the controlling circuit on the Power Distribution PWB has a
fault. Replace the Motor Assembly (REP 4.1.12). If the problem still
exists, replace the Power Distribution PWB (REP 4.1.15).
• If the Document Drive Rolls always operate forward, continue with
the procedure.
Attempt to scan a large (ANSI D or ISO A1) document at 25% (1:4)
reduction factor.
Listen carefully for noises indicating slippage of the Main Drive Belt.
Try scanning a document several times. The document Is
registered every time that it Is Inserted (Figure 1).
Y N
The document was transported smoothly forward and then
smoothly back.
Y N
There was noise Indicating that the motor was running.
Y N
Remove the Left Side Panel (REP 4.1.1).
Configure the system for diagnostic operation:
• ES8150/XPC: Section 6 of this manual.
• 8830 DDS: Section 6 of the 8830 DDS Service Manual.
Start the diagnostic software and select Component Tests.
Then select Output Tests.
Operate the motor in both the forward and the reverse
directions.
D
Lead Edge
REAR
Document
Drive Roll (2)
Platen Glass
Document
Clear Aperture
FRONT
Figure 1. Registration of the Lead Edge - Top View, Document
Hold-down Guide Removed
7356 Scanner
2/98
2-15
1.4 Document Drive RAP
ABC
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