LG DP392G, Service Manual, Page: 50 / 69

3-43 Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
+
-
+
-
+
-
V
DD
V
SS
L
IN
1 0 d B / S t e p
1 d B / S t e p
1 d B / S t e p
1 0 d B / S t e p
R
IN
SCL SDA
L
OUT
Control unit
Ref
R
OUT
3-2. Pin Description
Pin Name I/O Description Pin No.
L
IN
I
Left Input Channel
1
Connect a Capacitor to Audio Source
L
OUT
O
Left Output Channel
2
Connect a Capacitor to Audio Output
Vss - Ground 3
SDA I I
2
C Data Input 4
SCL I I
2
C Clock Input 5
V
DD
- Power Supply 6
R
OUT
O
Right Output Channel
7
Connect a Capacitor to Audio Output
Right Input Channel
R
IN
I
Connect a Capacitor to Audio Source
8
3. VOLUME CONTROLLER IC(PT2257)
3-1. Block Diagram