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Reference Information, cont'd
Remove (8) Screws
0. 3A
0V
0- 24
10
VSC 700D
H z
/6 0
50
4.
Locate the U29 firmware chip to be replaced on the
circuit board, as shown in the following illustrations.
A-8
VSC 500/700/700D • Appendix
Slide cover back
then lift straight up.
Remove (2)
IN
I
S D
Jack Screw
T
O U
-Y
B /B
2
Nuts
E O
-2 3
G /Y
ID
R S
S -V
/4 2
2
O C
K
V ID
-Y
N L
R /R
G E
V
V
H
S
H
U T
T P
O U
V
B
H
G
Remove
B
R
G
BNC Hex Nut
T S
P U
R
IN
Remove (9)
Screws from
Back Panel
VSC 500
U29
Do not touch any switches or other electronic
components inside the VSC. Doing so could
damage the video scan converter. Electrostatic
discharge (ESD) can damage IC chips even though
you cannot feel it. You must be electrically
grounded before proceeding with firmware
replacement. A grounding wrist strap is
recommended.
U29
5.
After you are electrically grounded, removal of the
U29 IC chip requires a PLCC IC puller tool. To
remove the U29 chip, align the hooks of a PLCC IC
puller tool with the slots located in opposite ends of
the firmware chip.
6.
Insert the hooks into the slots, and squeeze the tool
gently to grasp the chip.
7.
Pull the chip straight out of the socket, and set it aside.
8.
Align the slots of the new firmware chip with the
angled corners of the socket in the same orientation as
the old chip.
VSC 500/700/700D • Appendix
VSC 700/700D
A-9
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