42PC5D-UC, 42PC5DC-UC (CHASSIS:PA-73E) - LG TV Service Manual (repair manual). Page 12

Read LG 42PC5D-UC / 42PC5DC-UC (CHASSIS:PA-73E) Service Manual online

- 12 -
ADJUSTMENT INSTRUCTIONS
5. POWER PCB Assy Voltage 
Adjustment 
(Va, Vs Voltage Adjustment)
5-1. Test Equipment :
D.M.M 1EA
5-2. Connection Diagram for Measuring
Refer to Fig 1.
5-3. Adjustment(42”/50”) 
(1) Va Adjustment
1) Connect + terminal of D.M.M to Va pin of P812(50”:
P805) and connect – terminal  to GND pin of P812(50”:
P805).
2) Adjust VR901 voltage to match that of the label on the
Top/Right of the panel. (Deviation : ±0.5V)
(2) Vs Adjustment
1) Connect + terminal of D.M.M to Vs pin of P812(50”:
P805) and connect – terminal to GND pin of P812(50”:
P805).
2) Adjust VR951 voltage to match that of the label on the
Top/Right of the panel. (Deviation : ±0.5V) 
5-4. Adjustment(Sanken: EAY32929001) 
(1) Va Adjustment
1) Connect + terminal of D.M.M to Va pin of P12 and
connect – terminal  to GND pin of P12.
2) Adjust VR951 voltage to match that of the label on the
Top/Right of the panel. (Deviation : ±0.5V)
(2) Vs Adjustment
1) Connect + terminal of D.M.M to Vs pin of P12 and
connect – terminal to GND pin of P12.
2) Adjust VR901 voltage to match that of the label on the
Top/Right of the panel. (Deviation : ±0.5V)
Each PCB Assy must be checked by Check JIG Set before
assembly. (Especially, be careful Power PCB Assy which can
cause Damage to the PDP Module.)
1
1
1
VsADJ
VR951
VaADJ
VR901
3.3VADJ
VR221
T8
01
T9
01
T1
12
T5
01
L6
01
5V
GND
Va
GND
GND
NC
Vs
Vs
P811
1
1
1
VsADJ
VR951
VsADJ
VR951
VaADJ
VR901
VaADJ
VR901
3.3VADJ
VR221
T8
01
T9
01
T1
12
T5
01
L6
01
5V
GND
Va
GND
GND
NC
Vs
Vs
P811
<Fig. 1-1>  Connection Diagram of Power Adjustment for
Measuring (Power Board): 42” XGA/VGA
VsADJ
VR951
5V
GND
Va
GND
GND
NC
Vs
Vs
P811
1
1
1
VaADJ
VR901
3.3VADJ
VR221
T8
01
T9
01
L8
51
T5
01
T1
12
L6
01
VsADJ
VR951
5V
GND
Va
GND
GND
NC
Vs
Vs
P811
1
1
1
VaADJ
VR901
VaADJ
VR901
3.3VADJ
VR221
T8
01
T9
01
L8
51
T5
01
T1
12
L6
01
<Fig. 1-2>  Connection Diagram of Power Adjustment for
Measuring (Power Board): 50”
<Fig. 1-3>  50” PSU(Sanken: EAY32929001)
Page of 50
Display

Click on the first or last page to see other 42PC5D-UC / 42PC5DC-UC (CHASSIS:PA-73E) service manuals if exist.