IPC 7711A.pdf - 第188页
NOTES IPC-771 1A Number: 6.1.1 Revision: Date: 2/98 Subject: Removing Shorts on J-Leads P a g e2o f2 Copyright Association Connecting Electronics Industries Provided by IHS under license with IPC Not for Resale No reprod…
EQUIPMENT REQUIRED
Soldering system
Soldering handpiece
Appropriate tip*
MATERIALS
Flux
Cleaner
NOTES
*Choice of the proper tip is based on tools available and the number of bridged
leads. See tips illustrated above.
PROCEDURE
1. Install appropriate tip.
2. Start with the coolest tip temperature possible (approximately 280°C) and change
as necessary. The surface attraction of the solder to the tip must overcome that
of the leads.
3. Clean tip using a damp sponge.
4. Apply flux to the bridged leads. (See Figure 1.)
5. Bring the tip in with the bottom as flat as space will permit, with the toe towards
the component and between the bridged leads. When using the scalpel tip, the
flat bottom instead of the toe is towards the component. (See Figure 2.)
6. With the bottom still flat, stand the tip up so the side contacts the shoulders of
the leads and the bridge between them.
7. After a brief pause to allow the solder to flow to the tip surface, gently move the
tip straight out from the component body, drawing the bridge with it. (See Figure
3.)
8. If you did not draw off enough solder, allow leads to cool and repeat steps 2-5.
9. Clean, as required, and inspect.
Figure 1 Apply Flux
Figure 2 Tip Should Be Flat
Figure 3 Move tip
7711A
Rework of
Electronic Assemblies
Revision:
Date: 2/98
Removing Shorts on J-Leads
Draw Off Method
Number: 6.1.1
Product Class: R, F, W, C
Skill Level: Intermediate
Level of Conformance: High
Material in this manual, IPC-7711 Rework of Electronic Assemblies, was voluntarily established by Technical Committees of
IPC. This material is advisory only and its use or adaptation is entirely voluntary. IPC disclaims all liability of any kind as to the
use, application, or adaptation of this material. Users are also wholly responsible for protecting themselves against all claims
or liabilities for patent infringement. Equipment referenced is for the convenience of the user and does not imply endorsement
by IPC.
Page1of2
Copyright Association Connecting Electronics Industries
Provided by IHS under license with IPC
Not for Resale
No reproduction or networking permitted without license from IHS
--``,``,-`-`,,`,,`,`,,`---
NOTES
IPC-7711A
Number: 6.1.1
Revision:
Date: 2/98
Subject: Removing Shorts on J-Leads
Page2of2
Copyright Association Connecting Electronics Industries
Provided by IHS under license with IPC
Not for Resale
No reproduction or networking permitted without license from IHS
--``,``,-`-`,,`,,`,`,,`---
EQUIPMENT REQUIRED
Soldering system
Soldering iron
Appropriate tip*
MATERIALS
Flux
Cleaner
NOTES
*Choice of the proper tip is based on tools available and the number of bridged
leads. See tips illustrated above.
PROCEDURE
1. Install appropriate tip.
2. Start with the coolest tip temperature possible (approximately 315°C) and change
as necessary. The surface attraction of the solder to the tip must overcome that
of the leads.
3. Clean tip using a damp sponge.
4. Apply flux to the bridged leads. (See Figure 1.)
5. Bring the tip in at a 45° angle in relation to the row of leads. The side of the tip
will make contact with the leads, the toe with the lead and the land.
6. Draw the tip, and the liquid bridge with it, down the row, respreading the solder
across the rest of the leads. (See Figure 2.)
7. Clean, as required, and inspect.
Figure 1 Apply flux
Figure 2 Draw Tip Down Row
7711A
Rework of
Electronic Assemblies
Revision:
Date: 2/98
Removing Shorts on J-Leads
Respread Method
Number: 6.1.2
Product Class: R, F, W, C
Skill Level: Intermediate
Level of Conformance: High
Material in this manual, IPC-7711 Rework of Electronic Assemblies, was voluntarily established by Technical Committees of
IPC. This material is advisory only and its use or adaptation is entirely voluntary. IPC disclaims all liability of any kind as to the
use, application, or adaptation of this material. Users are also wholly responsible for protecting themselves against all claims
or liabilities for patent infringement. Equipment referenced is for the convenience of the user and does not imply endorsement
by IPC.
Page1of2
Copyright Association Connecting Electronics Industries
Provided by IHS under license with IPC
Not for Resale
No reproduction or networking permitted without license from IHS
--``,``,-`-`,,`,,`,`,,`---