Ricoh M052, Service Manual

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Precautions
M052/M053/M054 4-2 SM
Laser Unit
1. Do not loosen or adjust the screws securing the LD drive board on the LD unit. This will put
the LD unit out of adjustment.
2. Do not adjust the variable resistors on the LD unit. These are adjusted at the factory.
3. The polygonal mirror and F-theta lens are very sensitive to dust.
4. Do not touch the toner shield glass or the surface of the polygonal mirror with bare hands.
Fusing Unit
1. After installing the fusing thermistor, make sure that it is in contact with the hot roller and
that the roller can rotate freely.
2. Be careful to avoid damage to the hot roller stripper pawls and their tension springs.
3. Do not touch the fusing lamp and rollers with bare hands.
4. Make sure that the fusing lamp is positioned correctly and that it does not touch the inner
surface of the hot roller.
Paper Feed
1. Do not touch the surface of the paper feed rollers.
2. To avoid misfeeds, the side and end fences in each paper tray must be positioned correctly
so as to align with the actual paper size.
4.1.2 LITHIUM BATTERIES
ƒ
Incorrect replacement of lithium battery(s) on the controller or on the fax unit poses risk
of explosion. Replace only with the same type or with an equivalent type recommended
by the manufacturer. Discard used batteries in accordance with the manufacturer’s
instructions.
4.1.3 HALOGEN-FREE CABLE
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Use extreme caution while handling cables.
To comply with local regulations, halogen-free cables are used in this machine. Halogen-free
cables are environment-friendly, but no stronger than conventional cables. These cables may
be damaged in any of the following cases:
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The cable is caught between hard objects such as brackets, screws, PCBs, and exterior
covers.
ƒ
The cable is rubbed on a hard object such as brackets, screws, PCBs, and exterior covers.
ƒ
The cable is scratched with a hard object such as brackets, screws, PCBs, exterior covers,
screwdrivers, and fingernails.