DOWNLOAD Panasonic UF-590 / UF-790 Service Manual ↓ Size: 15 MB | Pages: 127 in PDF or view online for FREE

97

START

Yes

No

Is the Paper Cassette seated
properly

Reseat the cassette.

Yes

No

No

Is the recording paper loaded in
the cassette?

Load the paper.

Yes

No

Is the No Paper Actuator
operational?

Replace the Actuator.

Yes

Is the No Paper Sensor

operational?

Replace the No Paper Sensor.

Yes

No

Does the Paper Feed Roller turn?

Overhaul the Clutch Gear
Assembly.

END

98

START

END

Yes

No

Is the document path blocked?

Remove the blockage.

Yes

No

Does the Tx Motor rotate?

1. Replace the Tx Motor.
2. Replace the SC PCB.

Yes

No

Does the document feed into the
unit?

Check all gears and rollers.

Yes

No

Does the voltage on A-Point and 
B-Point Sensor Pin 2 of PNL1 
PCB,  vary between 0 and +5V 
when a document is set and 
removed?

Replace the PNL1 PCB.

START

END

END

Yes

No

Is there a dial tone when 
MONITOR button is 
pressed?

1. Connect the telephone 
     line correctly.
2. Check the telephone line.

Yes

No

Is the remote machine busy?

Can the unit dial the 
reference unit?

No

1. Check all connectors.
2. Replace the SC PCB.

1. The remote machine is 
    defective.
2. Telephone line quality is 
     poor.  
    (Refer to Sect. 4.6.)

Press the REDIAL button to 
retry connection.

Yes

99

403, 411, 414

START

END

END

Review the polling operation 
referring to the Operating 
Instructions.

Yes

Yes

No

Does the remote side have
polling transmission 
capability?

No

Ask the remote side to set 
their unit for polling operation.

Is the remote side set to 
polling transmission 
(Polled) Mode?

Check the password 
between the two units to 
ensure it matches.

415

START

END

Inform the remote side 
(receiving side) that their 
machine does not have 
polling transmission
capability.

Polling communication with 4-digit password is not an ITU-T Standard feature.
If the transmitter and receiver are of different manufacturers, polling communication 
with password 

may not be possible. 

100

START

No

Yes

Check the Scanner mechanism.

Is the Power Supply 
Unit normal?

Is the SC PCB normal?

Is the Toner Cartridge
operational?

Replace the Toner Cartridge.

1. Check all connectors and voltages 
     on the Power Supply Unit. 
2. Check the contacts between 
     PSU and Toner Cartridge.

3. Replace the PSU.

Yes

No

Yes

Yes

No

No

1. Check all connectors and voltages 
     on the SC PCB. 
2. Replace the SC PCB.

END

Paper Travel

Is the printout in Service 
Mode 3 normal?