Panasonic DX-600 Service Manual page 121

4.4.14. Poor Printed Copy Quality
Is the Test Pattern printout
in Service Mode 3 normal?
Make a local copy.
Is the printed copy correct?
Perform a receiving test
with the reference fax unit.
Is the received copy correct?
Is a poor copy printed only
when receiving from a
specific transmitter?
The transmitting machine
may be defective.
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Yes
No
Yes
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Yes
No
Yes
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1. Replace the SC PCB.
2. Replace the Laser Unit (LSU).
3. Replace the Power Supply Unit.
4. Replace the Toner Cartridge .
Check the Transmission Block
(CN30 on the CCD PCB and CN7 on
the SC PCB.
1. Check the CN18 on the SC PCB.
2. Check the CN28 and 29 on the
MJR PCB.
3. Check the Telephone Line Cable.
4. Replace the SC PCB.
Telephone line quality is poor.
(Refer to 4.6.)
121
DX-600/800
APR 2002