MT5Q1070c
4-1. Soldering of PCB
The recommended soldering conditions for mounting a PCB on the module are shown below.
4. PCB mounting instruction
© Fuji Electric Co., Ltd. All rights reserved.
7
4-2. Screwing fastening of PCB
This section describes the screwing method and precautions when mounting the PCB to the module.
1.
Use a self-tapping screw to fix the PCB to the module. As shown in Figure 5, use screws with
a diameter of 2.4 to 2.6 mm and a length of 7.0 to 10.0 mm from the underside of the PCB.
2.
To fix the PCB with even force, first perform temporary tightening with 1/3 of the final
tightening torque. Figure 6 shows the tightening sequence.
3.
Perform final tightening in the same sequence as temporary tightening. The final tightening
torque should be within the range of 0.4
±
10% Nm.
Temperature
Time
Flow soldering
Pre heat: 125
℃
max
Post heat
：
265
℃
max
Post heat
：
11s max
Hand soldering (by soldering iron)
410
℃
max
5s max
Table 2. Recommended soldering conditions
＜
Important notes
＞
Manual screwing is recommended to avoid damage to the module. When using an electric screwdriver,
optimize the parameters such as tool selection and tightening conditions. Check that the product is not
damaged after tightening. Also, the rotation speed should not exceed 300 rpm when screwing.
Do not tighten the screws in an tilted state as shown in Figure 7(a). It may result in mechanical
damage as shown in Figure 7(b).
Figure 5. Recommended screw dimensions and mounting image
(b) Recommended screw dimension (length)
and mounting image
(a) Recommended screw dimension (diameter)
2.4~2.6mm
2.4~2.6mm
2.4 ~ 2.6mm
Module
7.0 ~ 10.0mm
