Service manual

3. Trim Activity

Trim activities for HL-4200CN should be made within every SM/UM, mainly for

maintaining the machine performance. There is no service call performed only for

the trim activity.

3.1 Trim activity procedure

1. Check the overall operation before performing the trim activity.

Print any Internal Test Pattern to output three patterns: all colors of 20 % each,

halftone and grid.

All colors of 20 % each: IBT belt, scratches on the drum surface, and fusing

problem are checked.

Halftone pattern: Low density area reproduction problem, color balance and

fusing problem are checked.

Grid pattern: Color registration problem and fusing problem are checked.

* See page V-54 for test pattern output method.

2. Clean the interior of the machine.

Clean toner contamination and paper dust in the paper path area.

(Operator area should be cleaned carefully.)

3. Check the periodic replacement parts(consumable parts). Replace as required.

4. Safety check.

Check the Power Cord for damage or loose connection.

5. After 1 to 4 above completes, do the following overall operation checks.

Machine operation

Print quality

Meter reading

3.2 Mechanical consumables and periodic replacement parts

A mechanical consumable should be replaced after checking the printed sheets

count during trim action.

Consumable Product Code Number of sheets that can be

printed*1

Black Toner Cartridge TN-12CL 9K

Cyan Toner Cartridge TN-12CL 6K

Magenta Toner Cartridge TN-12CL 6K

Yellow Toner Cartridge TN-12CL 6K

Print Head Cartridge PH-12CL 30K

Transfer Roll Cartridge

(with Waste Toner Pack)

TR-11CL 25K

Fixing Parts FP-12CL 100K

*1: Condition

Paper size: A4 or LETTER

Toner coverage: 5%

Ratio of B/W to color: 1: 1

Average number of sheets printed at onetime: 4 sheets

Consumable Replacement interval Remarks

Fuser Unit 100K prints

Retard Roll 100K prints