Poor Transmitted Copy Quality - Toshiba E-STUDIO190F Service Manual

4.5.2.

Poor Transmitted Copy Quality

START
Make a copy.
Is the printed copy normal?
Yes
Perform a transmission test
to a reference fax unit.
Is the transmitted copy
normal?
Yes
Does poor transmitted copy
appear when transmitting to
a specific receiver?
Yes
The receiving unit may be
defective.
END
No
Is the LED lit?
Yes
Are CN (SC, SDR PCB)
and CN (CIS Assembly)
connected properly?
Yes
1. Replace the Scanner Block.
2. Replace the SC PCB.
3. Replace the SDR PCB.
No
1. Check CN (SC PCB)
and CN (FXB PCB).
2. Check the telephone line cable.
Replace if necessary.
No
Telephone line quality is
poor.
No
Does +5 VDC alive on
the SDR PCB?
Yes
Does nLEDON go Low
when the scan starts?
Yes
Check CN on the SC,
SDR PCB and the CIS
harness.
Does the problem still
occur?
Yes
Replace the
CIS Assembly.
No
Connect them correctly.
103
Replace the LVPS.
No
Replace the SC PCB.