3UVIEW TB2 사용자 설명서 - 페이지 14
{카테고리_이름} 3UVIEW TB2에 대한 사용자 설명서을 온라인으로 검색하거나 PDF를 다운로드하세요. 3UVIEW TB2 15 페이지. Vst taxi roof led display
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(5).How to replace the IC card
Heat the IC with a air pressure gun(390℃)
until the pin tin surface melts, then use
tweezers to pick up the IC.
Clean the conformal and tin freezing point
on the pad surface.
Remove the IC, Clamp the IC both ends
with tweezers so that each pin is aligned
with the corresponding pin position on the
pad.Note the IC direction.
Accurately corresponds and appress to the
IC pad.(Note that the pin at the concave dot
in the upper left corner of the IC front side is
the first pin and must be welded
corresponding to the small circle of the
circuit board IC silkscreen).
Use soldering iron to drag the pins on both
sides of the heating IC back and forth. Fuse
the tin on the pad with the pin and fix it onto
the pad.
Tilt the lamp board to 45 degrees Heat the
tin on the IC pin with a soldering iron, drag
it from up to down and gently shake off any
excess tin sticking to the soldering iron.Until
all the IC pins are not connected.
After module lights up and the display effect
is normal, assemble the module back into
the cabinet. Use single component RTV
silicone rubber (black) to patch in the
rubber where it has been scraped off and
around the lamp board of the module which
copper sheet is off.
Opertion schematic diagram
Use air pressure gun to
heat the bad IC
Clean the conformal coating
on the pad surface
Align the IC with the
direction and the pad
Clean up excess tin from
IC pins
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Remove the bad IC
Clean the tin freezing point
on the pad surface
Add tin to fix IC pin
Should not have connected
IC