General Cautions; Main Power Switch (Push Sw); Pcu (Photoconductor Unit); Transfer Roller - Ricoh D158 Service Manual

Lanier, ricoh, savin

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4. REPLACEMENT AND ADJUSTMENT

4.1 GENERAL CAUTIONS

Do not turn off the main switch while any of the electrical components are active. Doing so may

result in damage to units (such as the PCU) as they are pulled out or replaced.

If the AC power cord is connected, power is supplied to the controller, control panel, and the circuit

that detects the main power switch status even if the main power is turned off.

Therefore, even if the machine has shut down, the power is still supplied to the interior

components. If you attempt to replace the controller or control panel in such a state, the related

components may become damaged.

Be sure to pull off the AC power cord before replacing components (such as a circuit board).

The PCU consists of the OPC drum, charge roller, development unit, and cleaning components.

Observe the following precautions when handling the PCU.

1. Never touch the drum surface with bare hands. If the drum surface is dirty or if you have

accidentally touched it, wipe it with a dry cloth, or clean it with wet cotton and then wipe it dry

with a cloth.

2. Never use alcohol to clean the drum. Alcohol will dissolve the drum surface.

3. Store the PCU in a cool dry place.

4. Do not expose the drum to corrosive gases (ammonia, etc.).

5. Do not shake a used PCU, as this may cause toner and developer to spill out.

6. Dispose of used PCU components in accordance with local regulations.

1. Never touch the surface of the transfer roller with bare hands.

2. Be careful not to scratch the transfer roller, as the surface is easily damaged.

D158/D159/D160/D161/D170

General Cautions

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