Panasonic UF-8300 / UF-8200 / UF-7300 / UF-7200 (serv.man4) Service Manual ▷ View online
117
UF-7300/7200
UF-8300/8200
4.4.3.
Document Jam (030) or Skew
Copy Mode
Sample
END
START
Close the ADF Unit firmly.
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Is the ADF Unit closed?
Clean, or replace Sensor PCB.
Do all sensors
operate normally?
operate normally?
Clean the surface of roller
with water.
with water.
Does the Feed Roller have
drive, and sufficient friction?
drive, and sufficient friction?
Remove the foreign particles
or papers from the document
path.
or papers from the document
path.
Is the document path clear
of foreign particles, or paper?
of foreign particles, or paper?
Adjust, or replace any
defective parts.
defective parts.
Is the Transmitting
mechanism operating
properly?
mechanism operating
properly?
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UF-7300/7200
UF-8300/8200
4.5.
Communications
This section explains general troubleshooting procedures for the 400 series of Information Codes. These
errors are primarily caused by poor telephone line quality (loss, noise, echo, etc.). This unit is furnished with
Service Mode 1 to assist in troubleshooting line quality problems.
It is suggested that both the transmitting unit and receiving unit be adjusted. This section gives relevant
parameters in Service Mode 1 for the transmitting and receiving sides. If no improvement is realized after
the parameters are adjusted, it is recommended that the parameters be returned to the default settings.
errors are primarily caused by poor telephone line quality (loss, noise, echo, etc.). This unit is furnished with
Service Mode 1 to assist in troubleshooting line quality problems.
It is suggested that both the transmitting unit and receiving unit be adjusted. This section gives relevant
parameters in Service Mode 1 for the transmitting and receiving sides. If no improvement is realized after
the parameters are adjusted, it is recommended that the parameters be returned to the default settings.
4.5.1.
Communication Trouble
START
No
Yes
Is this an international
#021 : Off
On
#025 : 1st
2nd
#018 : 14400 bps
12000 to 2400 bps
#024 : 2100 Hz
1080 Hz
#030 : 75 ms
#033 : 33600 bps
#033 : 33600 bps
31200 to 2400 bps/
TC9600/TC7200
TC9600/TC7200
1 sec
communication?
Transmitting Side
Receiving Side
#010 : -9 dBm
0 to -15 dBm
To improve a poor S/N (signal-to-noise ratio).
#017 : 14400 bps
12000 to 2400 bps
#011 : -43 dBm
-33 dBm or -38 dBm
#018 : 14400 bps
#019 : On Off
#019 : On Off
12000 to 2400 bps
Transmitting Side
Receiving Side
Receiving Side
To equalize loss (Amplitude Distortion) between the fax unit,
and the phone company exchange.
and the phone company exchange.
#025 : 1st
2nd
1080 Hz
#030 : 75 ms 1 sec
To cope with shifted signal sequences caused by an echo.
#070 : 128
256 to 2048
To cope with impulse noise.
Receiving Side
Perform a communication test after changing settings.
Transmitting Side
Receiving Side
Transmitting Side
#014 : 0 dBm
4, 8, 12 dBm
#013 : 0 dBm
4, 8, 12 dBm
#033 : 33600 bps
31200 to 2400 bps
#023 : Normal
Long
#033 : 33600 bps
31200 to 2400 bps
#024 : 2100 Hz
119
UF-7300/7200
UF-8300/8200
4.5.2.
Poor Transmitted Copy Quality
START
Yes
Make a copy.
No
No
Yes
Is the printed copy normal?
Perform a transmission test
to a reference fax unit.
to a reference fax unit.
Is the LED lit?
Yes
Yes
No
Are CN (SC, SDR PCB)
and CN (CIS Assembly)
connected properly?
and CN (CIS Assembly)
connected properly?
Connect them correctly.
Replace the LVPS.
Does nLEDON go Low
when the scan starts?
when the scan starts?
Check CN on the SC,
SDR PCB, and the CIS
SDR PCB, and the CIS
harness.
Does the problem still
occur?
occur?
Replace the CIS
Assembly.
Assembly.
The receiving unit may be
defective.
defective.
1. Replace the Scanner Block.
2. Replace the SC PCB.
3. Replace the SDR PCB.
2. Replace the SC PCB.
3. Replace the SDR PCB.
Replace the SC PCB.
Is the transmitted copy
normal?
normal?
No
Yes
No
No
and CN (FXB PCB).
2. Check the telephone line cable.
Replace if necessary.
2. Check the telephone line cable.
Replace if necessary.
Does poor transmitted copy
appear when transmitting to
a specific receiver?
appear when transmitting to
a specific receiver?
Telephone line quality is poor.
END
Yes
Yes
Yes
Does +5 VDC alive on the
SDR PCB?
SDR PCB?
1. Check CN (SC PCB),
120
UF-7300/7200
UF-8300/8200
4.5.3.
Dialing Problems
START
END
No
Yes
Does the unit proceed to
Phase B?
Phase B?
1. Set documents on the ADF correctly.
4. Refer to Sect. 4.
3. The called party is busy.
2. Check the telephone line connection.
Are you using One-Touch
or ABBR dialing?
or ABBR dialing?
Are you using direct dialing?
No
Yes
Check the registered telephone number.
Is the Monitor Volume too
loud, or too low?
loud, or too low?
No
Yes
Check the dialed telephone number.
No
Yes
Adjust the monitor volume by pressing the
" " , or " " curser keys.
" " , or " " curser keys.
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