LG DS80QY.DDEULLK Service Manual

3-5
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Only for training and service purposes.
C3194
10uF
/10V
C3149
10uF
/10V
5.1VA
R3134
33K
(1%)
R3131
27K
R3133
150K
(1%)
R3132
51K
DGND
L3028
DGND
C3155
47pF
NC
TW3000
1
2
C3154
100nF
/16V
R3130
NC
3.3VA
3.3VA_OUT3.3VA_OUT
C3150
10uF
/10V
C3152
10uF
/10V
C3148
10uF
/10V
DGND
L3029
1uH
R3129
100K
NC
C3153
100nF
/16V
C3151
100nF
/16V
DGND
IC3023
@Optio
1
FB
2
OUT
3
PG
4
EN
5
IN
6LX
7
GND
3.33V
VOUT = 0.6 x (1+150K/33K) = 3.327V
ONE POINT REPAIR GUIDE
NO BOOTING WHEN YOU TURN THE UNIT ON, NO MESSAGE OR
“HELLO” ON FRONT PANEL
When you turn on your set, no message on the front panel, and LED doesn’t work.
1-2. IC3023 System 3.3 VA (No 3.3 VA)
1-2-1. Solution
Replace MAIN/ FRONT board.
1-2-2. How to troubleshoot (Countermeasure)
1) Please check 3.3 VA of IC3023 pin6.
2) If 3.3 VA is abnormal, replace MAIN board.
3) If 3.3 VA is OK, replace FRONT board.
1-2-3. Service hint (Any picture / Remark)
< MAIN board top view >
IC3023
IC3023

LG DS80QY.DDEULLK Specifications

General

Brand	LG
Model	DS80QY.DDEULLK
Category	Speaker System
Language	English