LG 42LB1DRA - 42" LCD Integrated HDTV Service Manual page 14

7. Cable Operation Confirmation
(1) Confirm that the Cable Card is inserted in the slot.
(2) Enter the EZ adjust menu by pressing the Adjust key on
the Service Remote Control (S R/C).
(3) Go to number 2 Cable Check and press the Right key (
(4) Confirm items below.
Name
Descrambler
Check
CableCARD CableCARD
is inserted.
OOB Path
FDC_SNR OK(20dB above)
Video Signal Normal Screen
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.)
8. POWER PCB Assy Voltage
Adjustment
(Va, Vs Voltage Adjustment)
8-1. Test Equipment :
8-2. Connection Diagram for Measuring
Refer to Fig 1.
Vs AD
Vs
VR95 VR90
GND
Va
DMM
P805
GND
+ -
5V
P804
P800
P803
1
1
<Fig. 1-1> Connection Diagram of Power Adjustment for
Measuring (Power Board): 50"
Normal Defective
OK Not OK
TM CableCARD
is removed.
OK(Lock) Not OK(Unlock)
Not OK(20dB under)
Black Screen
(No Picture)
D.M.M 1EA
Va AD
P802
1
) .
G
TM
<Fig. 1-2> Connection Diagram of Power Adjustment for
Measuring (Power Board): 60"
9. EDID(The Extended Display
Identification Data)/DDC
(Display Data Channel) Download
This is the function that enables "Plug and Play".
9-1. HDMI EDID Data Input
(1) Required Test Equipment
1) PC, Jig for adjusting DDC. (PC serial to D-sub
Connection equipment)
2) S/W for writing DDC(EDID data write & read)
3) D-Sub cable
4) Jig for HDMI Cable connection
(2) Preparation for Adjustments &
Setting of Device
1) Set devices as below and turn on the PC and JIG.
2) Open S/W for writing DDC (EDID data write & read).
(operated in DOS mode)
CN1
- 14 -
PDP TV SET
(or Digital Board)
<Fig. 2>