|
67
|
TROUBLESHOOTING GUIDE
KX-F680BX/KX-F2681BX
(7) CHECK SOLDERING
We should check soldering at first.
Because many problem are caused by a defective soldering.
How to Visual-Check the soldering
Defective soldering (shorted, un-welded, oxidized...) doesn't have a good looking outward.
In order words outward (gloss, brightness, form) is important for soldering. So we should do visual inspection.
A basis of soldering is skirt!
Smooth skirt is shaped by surface tension as melting cream solder in reflow machine or lifting P.C. Board
from DIP.
Section of Soldering Skirt
skirt
Leaded parts
SMT (QFP. SOP) parts : ASIC, MDM, SRAM
SMT (PLCC) parts : CODEC
Chip parts Resistor array
skirt
skirt
skirt
Summary of Contents for KX-F680BX
Page 1: ......
Page 11: ......
Page 106: ......
Page 107: ......
Page 108: ......
Page 109: ......
Page 110: ......
Page 111: ......
Page 112: ......
Page 113: ......
Page 114: ......
Page 115: ......
Page 116: ......
Page 117: ......
Page 118: ......
Page 119: ......
Page 120: ......
Page 121: ......
Page 122: ......
Page 123: ......
Page 124: ......
Page 125: ......
Page 126: ......
Page 127: ......
Page 128: ......
Page 129: ......
Page 130: ... 165 KX F680BX KX F2681BX EC1 EC2 EC3 EC4 EC5 EC6 EC7 EC9 EC10 EC11 EC12 EC13 EC8 TOOLS ...
Page 131: ......
Page 133: ......
Page 134: ......
Page 135: ......
Page 136: ......