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4343
MDS-NT1
6-8. PRINTED WIRING BOARD – MAIN Board (Conductor Side) –
MAIN BOARD (CONDUCTOR SIDE)
1-682-708-
12
(12)
IC450
IC440
USB
CN4
2
3
4
1
1
2
CN4
(FRONT VIEW)
J400
–
+
DC IN 9V
SHORT
SOCKET
8
1
123
(CHASSIS)
PHONE
LEVEL
RV301
ANALOG
OUT
CN200
PHONES
J180
1 2 3 4 5 6 7 8 9 10 11
A
B
C
D
E
F
G
H
I
–1 –2
Ref. No. Location
IC440 G-7
IC450 H-4
• Semiconductor
Location