Sanyo PLC-XF46N Service Manual page 80

Electrical Adjustments
z
Voltage adjustment
Equipment
1 - 1 +6V adjustment
1. Adjust the voltage by using
as following.
Connection
(+) 2pin of K6D
on the Power Board
(–) Chassis GND
1 - 2 +25V adjustment
1. Adjust the voltage by using
regulator A902
as following.
Connection
(+) TP7614
on the Unit Sub Power
(–) Chassis GND
x
AV video signal adjustment
Equipment Oscilloscope
Input mode Video mode
Input signal 16-step gray scale signal
Picture mode Normal
1. Enter the service mode.
2. Connect an oscilloscope to each test points.
3. Change data values for each test points to;
(a) adjust the amplitude A to below value.
(b) adjust the pedestal level and black level to be the
same level.
Group No. Connection Step
1010 - 0 TP211 (G)
1010 - 1 TP211 (G)
1010 - 2 TP201 (R)
1010 - 3 TP201 (R)
1010 - 4 TP221 (B)
1010 - 5 TP221 (B)
A
Digital voltmeter
VR652
on the power board
Adjustment value
6.35 ±0.05Vdc
the VR in the switching
Adjustment value
25.0 ±0.1Vdc
Adjustment value
0.7
(a) ±0.05V
make the same level
(b)
0.7
(a) ±0.05V
make the same level
(b)
0.7
(a) ±0.05V
make the same level
(b)
Pedestal
Level
Black Level
c
AV 3DNR-PLL lock check
Equipment Digital voltmeter
Input mode Video mode
Input signal Color bar signal (PAL)
Picture mode Normal
1. Check the voltage. If it is not, check the peripheral cir-
cuit of 3DNR and repair it.
Connection
(+) TP5103
(–) Chassis GND
v
AV color and tint adjustment
Equipment Oscilloscope
Input mode Video mode
Input signal Color bar signal (NTSC)
Picture mode Normal
1. Enter the service mode.
2. Connect an oscilloscope to TP221.
3. Change data value to;
(color) adjust the amplitude A to below value.
(tint) adjust the amplitude B, C and D to the same
width.
Group No. Connection Step
1000 - 25 TP221 (B)
1000 - 24 TP221 (B)
-80-
Value
2.9 ±0.5Vdc
Adjustment value
0.45
(color) ±0.02V
make the same level
(tint)
B
C
D
A