IPC 7711A.pdf - 第87页
EQUIPMENT REQUIRED Soldering system Removal tip Chisel tip Soldering handpiece OPTIONAL EQUIPMENT Tweezers MATERIALS Flux-cored solder Cleaner PROCEDURE 1. Remove conformal coating (if any) and clean work area of any con…
NOTES
IPC-7711A
Number: 3.6.1
Revision:
Date: 2/98
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
Removal tip
Chisel tip
Soldering handpiece
OPTIONAL EQUIPMENT
Tweezers
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. Replace chisel tip in soldering handpiece with removal tip.
6. Remove older solder from tip and thermal shock tip with damp sponge.
7. Tin bottom and inside edges of tip with solder. (See Figure 2.)
8. Lower tip over component contacting ALL leads with tip. (See Figures3&4.)
9. Confirm solder melt of ALL joints and lift component from PWB. (See Figures 4
& 5.) (Surface tension of the tip should lift the component from the board. If this
does not occur, use of tweezers to lift the component is optional.)
10. Release component from tip by wiping on a heat resistant surface.
11. Re-tin tip with solder.
12. Prepare lands for component replacement.
Figure 1 Tack and Wrap Solder
Figure 2 Tin Tip
Figure 3 Position Tip
Figure 4 Melt All Joints
Figure 5 Lift Component
7711A
Rework of
Electronic Assemblies
Revision: A
Date: 10/03
Gull Wing Removal (two-sided)
Solder Wrap Method
Number: 3.6.2
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
--``,``,-`-`,,`,,`,`,,`---
NOTES
IPC-7711A
Number: 3.6.2
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
--``,``,-`-`,,`,,`,`,,`---