Alignments
EN 28
LGE PDP 2K6
8.
8.2.5
Z-SUS Alignment
Figure 8-6 Z-SUS alignment
Condition
•
Set up a situation as shown in
“
Measuring equipment
connection diagram
”
.
•
Check if the voltages Vs and Va of the PSU are correct
(see PSU label and PSU Alignment 8.2.3).
Vzb (Z bias) Voltage Adjustment
1.
Measure the voltage between the Vzb test point (the drain
of Q18) and GND on the Z-SUS board (see Figure
“
Z-SUS
Alignment
”
).
2.
Adjust Vzb to 100 ± 0.5 V with potentiometerVRzb on the
Z-SUS board.
8.2.6
Internal Test Patterns
The CTRL board is capable of generating its own video test
patterns. To generate the test patterns, do as follows:
•
Disconnect the mains cord.
•
Disconnect the SSB of the TV set, by removing the cables
of connectors 1M03 and 1M46 on the PSU.
•
Reconnect the mains cord.
•
Connect pins 1 & 2 or pins 3 & 4 of Connector P1 on the
Control Board (see Figure below) to each other.
•
Now the internal test patterns are automatically shown in a
loop.
Figure 8-7 P1: Connector for Internal Test Patterns
G_16391_010.eps
020707
B28
P4
P5
Q18
VRzb
P6
FS1
FS2
FS3
P1
P2
GND
Vzb
G_16391_012.eps
020707
P7
P2
P1
P11
P10
P3
IC1
X1
D13
D14
D15
P4
D12
CTRL board
VS_DA
TRIGGER
POINT
IC12
IC11
IC13
+1.8V
+3.3V
1
+3.3V
