Sharp MXB201

A. Main charger (Grid bias)

Note:

• Use a digital multi meter with internal resistance of 10MΩ or more measurement.
• After adjusting the grid LOW output, adjust the HIGH output. Do not reverse the sequence.

Procedures

1. Set the digital multi meter range to DC700V.
2. Set the positive side of the test rod to the connector CN11-3 (GRID) of high voltage section of the power PWB and set the negative side to the frame ground (power frame).
3. Execute SIM 8-2. (The main charger output is supplied for 30 sec in the grid voltage HIGH output mode.)
4. Adjust the control volume (VRG1) so that the output voltage is 580 ± 12V.

B. DV bias check

Note:

• A digital multi meter with internal resistance of 1GΩ must be use for correct check.
• The adjustment volume is locked, and no adjustment can be made.

Procedures

1. Set the digital multi meter range to DC500V.
2. Set the positive side of the test rod to the connector CN-10-1 (DV BIAS) and set the negative side to the frame ground (power frame).
3. Execute SIM 8-1 to output the developing bias for 30sec, and check that the output is –400 ± 8V.