Malfunction - Ricoh B174 Service Documentation

4.3.4 MALFUNCTION

Error
Status
No power 1. Check the supplied
power
2. Check if fuse F1 on the
SMPS is open
Fuser Error 1. Thermostat open
2. AC wire open
3. Thermistor wire open
4. Main PBA
Cover open 1. When you close the side
cover, check that the
lever is pressed
2. Microswitch contact
3. CPU and related circuit
Jam 0 Check where Jam 0 occurs
1. Paper is not picked up
2. Paper is at the feed
sensor
3. Occurred when inserting
specific types of paper
such as envelopes into
the bypass tray?
4. Is the Stacker Extender
folded out?
5. Does the guide bend the
sheets?
SM
Check
1.
2.
1.
2.
3.
4. Replace the Main PBA
1.
2.
3. Check and replace the main PBA
1. Check whether the solenoid is working or
2. Check for a feed sensor malfunction.
3. Re-try inserting fewer sheets.
Take out the loaded sheets and insert
them in the reverse direction
4. When using long paper, use the Stacker
5. Adjust the guide to fit the paper width
4-23
TROUBLESHOOTING
Solution
If the supplied power differs from
machine's power rating, replace the
machine to the correct type for your
area.
Replace SMPS.
Detach the AC connector and measure
the resistance between pin 1 and 2. If it
is mega-ohm, the thermostat is open,
Replace it.
Check if there is a bad connector
contact or if the wire is cut.
Check the thermistor wire and its
connection.
Open the side cover and press the lever
with a pen. If the machine detects that
the cover is closed, there is a
mechanical problem with the side cover
and lever assembly. If not, there is an
electrical problem.
Check and replace the microswitch
not by using Engine test mode
• Fan the sheets and align them
• Take out the loaded sheets and insert
them in the reverse direction
• Inserted sheets as recommended for
Manual Feeding?
• When loading, tap the sheets until the
paper sensor detects them in the tray
Extender
B174