IPC 7711A - 第94页

NOTES IPC-771 1A Number: 3.6.5 Revision: A Date: 10/03 Subject: Gull Wing Removal (two-sided) P a g e2o f2 Copyright Association Connecting Electronics Industries Provided by IHS under license with IPC Not for Resale No …

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EQUIPMENT REQUIRED
Soldering system
Tweezer handpiece
Removal tips
Chisel tip
Soldering handpiece
MATERIALS
Flux-cored solder
Cleaner
PROCEDURE
1. Remove conformal coating (if any) and clean work area of any contamination,
oxides or residues.
2. Install chisel tip into soldering handpiece.
3. Start with tip temperature of approximately 315°C and change as necessary.
4. Tack solder to one of the corner component leads using the soldering hand-
piece with a chisel tip installed. Wrap solder around the four sides of the com-
ponent. Tack solder at the end of the last side. (See Figure 1.)
5. Install removal tips into tweezer handpiece.
6. Start with tip temperature of approximately 315°C and change as necessary.
7. Remove old solder from tips and thermal shock tips with damp sponge.
8. Tin bottom and inside edges of tips with solder. (See Figure 2.)
9. Lower tips over component and squeeze handpiece contacting ALL leads with
tips. (See Figure 3.)
10. Confirm solder melt of ALL joints and lift component from PWB. (See Figure 4.)
11. Release component from tips by wiping on a heat resistant surface.
12. Re-tin tips with solder.
13. Prepare lands for component replacement.
Figure 1 Tack Solder
Figure 2 Tin Tips
Figure 3 Position Tips
Figure 4 Lift Component
7711A
Rework of
Electronic Assemblies
Revision: A
Date: 10/03
Gull Wing Removal (two-sided)
Solder Wrap Method – Tweezer
Number: 3.6.5
Product Class: R, F, W, C
Skill Level: Advanced
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: 3.6.5
Revision: A
Date: 10/03
Subject: Gull Wing Removal (two-sided)
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
Tweezer handpiece
Removal tips
MATERIALS
Flux-cored solder
Flux
Cleaner
PROCEDURE
1. Remove conformal coating (if any) and clean work area of any contamination,
oxides or residues.
2. Install removal tips into tweezer handpiece.
3. Start with tip temperature of approximately 315°C and change as necessary.
4. Apply flux to all lead/land areas. (See Figure 1.)
5. Remove old solder from tips and thermal shock tips with damp sponge.
6. Tin bottom and inside edges of tips with solder. (See Figure 2.)
7. Lower tips over component and squeeze handpiece contacting ALL leads with
tips. (See Figure 3.)
8. Confirm solder melt of ALL joints and lift component from PWB. (See Figure 4.)
9. Release component from tips by wiping on a heat resistant surface.
10. Re-tin tips with solder.
11. Prepare lands for component replacement.
Figure 1 Apply Flux
Figure 2 Tin Tips
Figure 3 Position Tips
Figure 4 Lift Component
7711A
Rework of
Electronic Assemblies
Revision: A
Date: 10/03
Gull Wing Removal (two-sided)
Flux Application Method – Tweezer
Number: 3.6.6
Product Class: R, F, W, C
Skill Level: Advanced
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
--``,``,-`-`,,`,,`,`,,`---