Printer Self Repair

Board Removal

4.2.2.1 C486 Main Board Removal

1. Remove Printer Mechanism. (See Section 4.2.1.4)

2. Remove all cables from C486 Main Board and peel off acetate tape in 2 places.

Figure 4-14. Main Board Removal 1

3. Remove 4 screws (C.B.S 3x6: 1, C.B.S 3x8: 2, C.B.S 3x16: 1) holding C486 Main Board, then remove Printer Mechanism from C486 Main Board in upward direction.

Figure 4-15. Main Board Removal 2

■ The CN19 cable on the C486 Main Board has a specified installation direction. The pin connected to the blue line of the cable should be inserted into the Pin 1 side of the connector.

Figure 4-16. CN19 Connection Direction

■ When C486 Main Board has been replaced by a service part, the installation screw holes do not have threads, as shown below. When installing C486 Main Board to the Printer Mechanism, metal chips that are formed in the process can become a source for shorting the printer. For this reason, use a brush to clean 2 places in the order shown below and remove the metal chips.

C486 Main Board

Figure 4-17. Metal

C486 Main Board

Figure 4-17. Metal

C486 Main Board has no ROM and is established as a service part by the Socket attachment.

When replacing the C486 Main Board, the adjustments are necessary. Refer to "Chapter 5 Adjustment" for the adjustment procedures.

Chips Removal

4.2.2.2 C486 PSB/PSE Board Removal

1. Remove C486 Main Board. (See Section 4.2.2.1)

2. Remove 2 screws (C.B.S 3x6) holding C486 PSB/PSE Board.

3. After shifting C486 PSB/PSE Board temporarily in the direction of arrow A, release the hook, then pull the board in the direction of arrow B and remove it from the Printer Mechanism.

Figure 4-18. C486 PSB/PSE Board Removal

Figure 4-18. C486 PSB/PSE Board Removal

When replacing the C486 PSB/PSE Board, the adjustments are necessary. Refer to "Chapter 5 Adjustment" for the adjustment procedures.

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