IPC 7711A - 第190页
NOTES IPC-771 1A Number: 6.1.2 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 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
--``,``,-`-`,,`,,`,`,,`---
NOTES
IPC-7711A
Number: 6.1.2
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
Cup or flat faced tip
MATERIALS
Flux
Cleaner
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. Apply flux to the bridged leads. (See Figure 1.)
4. Clean tip using a damp sponge.
5. Hold the tip so the shaft runs parallel to the row of leads, putting the side of the
tip toward the side of the component. The angle between the side of the tip and
the side of the component can be up to 30 degrees depending on operator pref-
erence. (See Figure 2.)
6. Bring the flat surface of the tip down on the bridge, wait for reflow, then draw the
bridge gently down the leads and away from the component. (See Figure 3.)
7. If you did not get all the solder on the first try, wipe the excess solder from the tip
and repeat the procedure.
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 Hold Tip Parallel
30 degree
maximum
Figure 3 Draw Tip Away From
Component
7711A
Rework of
Electronic Assemblies
Revision:
Date: 2/98
Removing Shorts Between Gull Wing
Draw Off Method
Number: 6.1.3
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
--``,``,-`-`,,`,,`,`,,`---