Ricoh SP 8400DN Field Service Manual page 1093

Fusing Unit
Replacement
•
In 100 V models, only one of the AC lines for the fusing unit is shut off when you turn off the main
power; the other line carries current even when you turn off the main power switch. Because of this,
turn off the main power switch, and also always pull out the AC power cord from the wall socket before
doing replacement.
•
Because there is a danger of burns on contact with hot parts of the fusing unit, start work when the
temperature drops to a low enough temperature.
•
To clear SC544-02 or SC554-02, replace the fusing unit or install a fuse (provided in the heating sleeve
belt unit) in the fusing unit. If you will install a new fusing unit, follow the procedure below to clear
SC544-02 or SC554-02.
1. Install a new fusing unit.
2. Clear SC544-02 or SC554-02 with SP5-810-002
3. Turn the machine off and on.
When the fusing unit is used past its PM cycle, the fusing unit may break, causing a service call. Therefore, the
machine displays a warning on the operation panel at 320K pages and stops at 350K pages.
•
If you replace a whole fusing unit, you do not need to perform SP3-701. This is because the machine
detects a new unit automatically. If you replace only a part of the fusing unit, however, such as the
pressure roller, you must set SP3-701 for that part.
1.
Open the right cover and open the transfer unit [A].
4.Replacement and Adjustment
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