IPC 7711A.pdf - 第135页
EQUIPMENT REQUIRED Soldering system Soldering handpiece Removal tip Broad surface tip MATERIALS Flux-cored solder Cleaner PROCEDURE 1. Remove conformal coating (if any) and clean work area of any contamination, oxides or…
NOTES
IPC-7711A
Number: 3.9.2
Revision:
Date: 2/98
Subject: BGA Removal
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 handpiece
Removal tip
Broad surface tip
MATERIALS
Flux-cored solder
Cleaner
PROCEDURE
1. Remove conformal coating (if any) and clean work area of any contamination,
oxides or residues.
2. Cut tabs holding plastic center piece to PLCC socket and remove.
3. Install broad surface tip into soldering handpiece.
4. Start with tip temperature of approximately 315°C and change as necessary.
5. Using soldering handpiece, melt solder to form a solder bridge joining all com-
ponent leads. (See Figure 1.)
6. Replace broad surface tip in soldering handpiece with removal tip.
7. Remove old solder from tip and thermal shock tip with damp sponge.
8. Tin the outside and bottom edges of tip with solder. (See Figure 2.)
9. Fully insert tip into component contacting ALL leads with tip. (See Figures 3
& 4.)
10. Confirm solder melt of ALL joints and lift component from PWB. (See Figures 4
& 5.)
11. Release component from tip by wiping on a heat resistant surface.
12. Re-tin tip with solder.
13. Prepare lands for component replacement.
Figure 1 Bridge Fill
Figure 2 Tin Tips
Figure 3 Position Tip
Figure 4 Melt All Joints
Figure 5 Lift Component
7711A
Rework of
Electronic Assemblies
Revision:
Date: 2/98
PLCC Socket Removal
Bridge Fill Method
Number: 3.10.1
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: 3.10.1
Revision:
Date: 2/98
Subject: PLCC Socket Removal
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
--``,``,-`-`,,`,,`,`,,`---