Cn-1405 Board; If-678 Board - Sony MAV-70 Manual

2-5-1. CN-1405 Board

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When the CN-1405 board is replaced, be sure to put on an
earth-band to establish a ground.
1. Disconnect the power cords from the rear panel.
2. Remove the front panel (lower). (Refer to Section 2-2-
1.)
3. Remove the HDD unit on the cushion gently. (Refer to
Section 2-4-3.)
4. Remove the two connectors of the harness connected
to the HDD gently.
5. Remove the two screws and CN-1405 board.
Insulating sheet
CN-1405 board
Washer
Step screw
6. Replace the CN-1405 board and perform the removal
procedures in reverse order.
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When the CN-1405 board is installed, use the torque driver
as shown below to avoid the shock to the HDD.
Shockless torque screwdriver
1.2N.m {12 kgf.cm} : J-6530-070-A
MAV-70
HDD unit

2-5-2. IF-678 Board

1. Disconnect the power cords from the rear panel.
2. Remove the cover. (Refer to Section 2-2-2.)
3. Remove the front panel (lower) and ornamental panel
A. (Refer to Section 2-2-1.)
4. Open the front panel A. (Refer to Section2-4-2.)
5. Remove the power supply units. (Refer to Section 2-4-
2.)
When there is one power supply, remove the four
screws (PSW 3x6) and blank panel.
6. Remove the all HDD units.(Refer to Section 2-4-3.)
7. Remove the four screws (BVTT 3x6) and front stay.
8. Remove the eight screws (PSW 3x6) and two power
guides.
9. Remove the five screws (PSW 3x6) and four screws
(BVTT 3x6), then remove the IF positioning bracket.
10. Remove and replace the IF-678 board.
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The IF-678 boards correspond to each HDD unit.
PSW 3x6
BVTT 3x6
Front stay
Blank panel
BVTT
3x6
PSW 3x6
11. For installation, perform the removal procedures in
reverse order.
2-5. Boards Replacement
PSW 3x6
Power guides
IF positioning bracket
IF-678 board
BVTT 3x6
2-19 (E)