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QB-V850ESFJ3 Preliminary User's Manual
2.5 Mounting and Connecting Connectors (When Using S Type)
This section describes the methods for connecting the QB-V850ESFJ3 to the target system when using the S
Type.
Make connections with both the QB-V850ESFJ3 and target system powered off.
The following abbreviations are used in this section.
• TC: Target connector
• EA: Exchange adapter
• MA: Mount adapter
• CA: Check pin adapter
• SA: Space adapter
2.5.1 Mounting TC onto target system
(1) Apply cream solder to the foot pattern of the target system for mounting an IC.
(2) A circular projection is at the center of the bottom side of the TC (refer to Figure 2-4). Sparingly apply two-
component epoxy adhesive (type that hardens in 15 to 30 minutes is recommended) to temporarily secure
the connector at the specified position on the target system. At this time, match the position of pin 1
(position where a corner is cut) with the position of pin 1 from the target
system.
(3) Soldering condition of TC
(a) Reflow soldering
At 245°C for a maximum of 20 seconds (main heating)
(b) Manual soldering
At 320°C for a maximum of 5 seconds (per pin)
(4) Precautions on flux splatter
If the solder flux splatters when the connector is soldered, faulty contact may occur. Be sure to cover the
upper part of the connector with aluminum foil. Do not clean the connector because the flux solvent may
remain inside the connector.
2.5.2 Inserting EA into TC
Match the pin 1 position of the EA, MA, CA, or SA to the pin 1 position of the TC and insert it (corner cuts match
in both).
(a) When inserting or removing, hold down the TC with your fingers so that there is no force on the TC.
(b) When inserting or removing, be careful of the direction of wiggling (refer to Figure 2-5).
As a tool when removing, insert some kind of thin non-conductive material such as a wooden stick in
between the TC and EA and wiggle it in the direction shown in Figure 2-5 while slowly removing. Be careful
since the connector will be damaged if this is done in the wrong direction.
Figure 2-5. Inserting and Removing
SA
TC
ZUD-CD-05-0149
Figure 2-4. TC Projection
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