LG 37LB1D-UB, Service Manual

Page: 14 / 81

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 (
G
) .
(4) Confirm items below.
8. POWER PCB Assy Voltage
Adjustment
(Va, Vs Voltage Adjustment)
8-1. Test Equipment :
D.M.M 1EA
8-2. Connection Diagram for Measuring
Refer to Fig 1.
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)
- 14 -
Name
Descrambler
Check
CableCARD
OOB Path
FDC_SNR
Video Signal
Normal
OK
CableCARD TM
is inserted.
OK(Lock)
OK(20dB above)
Normal Screen
Defective
Not OK
CableCARD TM
is removed.
Not OK(Unlock)
Not OK(20dB under)
Black Screen
(No Picture)
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.)
Vs AD
AD Va
Vs
VR95 VR90
GND
Va
DMM
P805
GND
5V
-
+
P804
CN1
P800
P803
P802
1
1
1
<Fig. 1-1> Connection Diagram of Power Adjustment for
Measuring (Power Board): 50”
PDP TV SET
(or Digital Board)
<Fig. 2>
<Fig. 1-2> Connection Diagram of Power Adjustment for
Measuring (Power Board): 60”