No. Board name Procedure Steps after replace-
ment
（13） CN-3432 board “4-11-5. DC IN Connector (CN-3432 Board)” -
（14） CN-3434 board “4-3-4. CN-3434 Board” -
（15） DPR-370 board “4-8-3. DPR-370 Board” -
（16） IF-1278 board “4-6-2. IF-1278 Board” -
（17） LE-376 board “4-7-1. LE-376 Board/SW-1524 Board” -
（18） MB-1214 board “4-8-4. MB-1214 Board” -
（19） MEM-147 board “4-3-2. MEM-147 Board/TX-146 Board” -
（20） PS-836 board “4-8-2. Power Block Assembly (RE-291 Board/PS-836 Board)” -
（21） RE-291 board “4-8-2. Power Block Assembly (RE-291 Board/PS-836 Board)” -
（22） SW-1524 board “4-7-1. LE-376 Board/SW-1524 Board” -
（23） SW-1525 board “4-7-3. SW-1525 Board” -
（24） SW-1527 board “4-8-5. SW-1527 Board” -
（25） SW-1528 board “4-8-9. SW-1528 Board” -
（26） SW-1530A
board
“4-12-2. SW-1530 Board/SW-1530A Board” -
（27） SW-1531 board “4-8-12. SW-1531 Board” -
（28） SW-1672 board “4-8-7. SW-1672 Board” -
（29） SY-408 board “4-8-1. SY-408 Board/AT-189 Board” “1-4-2. Adjustment and
Setting Required when
Replacing the SY-408
BoardProcedure”
（30） TX-146 board “4-3-2. MEM-147 Board/TX-146 Board” -
4-1-2. Basic Knowledge
Flexible card wire and fine-wire coaxial cable
When installing the flexible card wire and fine-wire coaxial cable, connect the wire securely referring to “1-7. Flexible
Card Wire and Coaxial Cable”.
4-1-3. Tightening Torque
Torque driver and screw tightening torque
General five types of screws are used in this unit. Be sure to use a torque driver and tighten screws to the specified
tightening torque.
Tightening torque
P1.7：0.10 ±0.02 N·m (1.01 ±0.20 kgf·cm)
B2：0.30 ±0.02 N·m (3.04 ±0.20 kgf·cm)
K2：0.30 ±0.02 N·m (3.04 ±0.20 kgf·cm)
B2.6：0.53 ±0.07 N·m (5.30 ±0.70 kgf·cm)
B3：0.80 ±0.02 N·m (8.15 ±0.20 kgf·cm)
Tip
• When using the torque driver with the notation of cN· m, interpret it as follows.
Example: 0.8 N·m = 80 cN·m
• Since small screws are used in this unit, they may fall into the unit when they are removed and installed. To prevent
screws from falling, it is recommended that the bit of each torque driver be magnetized to a degree that prevents
screws from falling.
HDC4300
4-3
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