Sharp SX76NF200, Service Manual

Page: 6 / 66

6
6-1 6-2
SX76NF200
HORIZONTAL, VERTICAL, DEFLECTION LOOP ADJUSTMENT CONTINUED
NO
6
7
8
9
10
11
12
ADJUSTMENT POINT
TRAPEZE
(I2C BUS CONTROL)
CUSHION
(I2C BUS CONTROL)
CORNER AMPLITUDE
(I2C BUS CONTROL)
CORNER AMPLITUDE
(SIXTH)
(I2C BUS CONTROL)
ANGLE
(I2C BUS CONTROL)
BOW
(I2C BUS CONTROL)
S CORRECTION
(I2C BUS CONTROL)
2) 120Hz FULL
ADJUSTMENT CONDITION / PROCEDURE WAVEFORM OR OTHERS
(1) Call the "TRAPEZE" mode.
(2) Increase or decrease "TRAPEZE" by Volume key.
(1) Call the "CUSHION" mode.
(2) Increase or decrease "CUSHION" by Volume key.
(1) Call the "UPPER CORNER" mode.
(2) Increase or decrease "UPPER CORNER" by Volume
key.
(3) Call the "LOWER CORNER" mode.
(4) Increase or decrease "LOWER CORNER" by Volume
key.
(1) Call the "UPPER CORNER (SIXTH)" mode.
(2) Increase or decrease "UPPER CORNER (SIXTH)" by
Volume key.
(3) Call the "LOWER CORNER (SIXTH)" mode.
(4) Increase or decrease "LOWER CORNER (SIXTH)" by
Volume key.
(1) Call the "ANGLE" mode.
(2) Increase or decrease "ANGLE" by Volume key.
(1) Call the "BOW" mode.
(2) Increase or decrease "BOW" by Volume key.
(1) Call the "S CORRECTION" mode.
(2) Increase or decrease "S CORRECTION" by Volume key.
Adjust items 2), same as 100Hz FULL NO.1--
NO.12
FOCUS ADJUSTMENT
NO
1
ADJUSTMENT POINT
FOCUS
ADJUSTMENT CONDITION / PROCEDURE
(1) Receive the "Monoscope Pattern" signal.
(2) Press R/C to set Picture NORMAL condition.
(3) Select full mode.
(4) Adjust the focus control to get the best focusing.
WAVEFORM OR OTHERS
(Adjusted point)
PROTECTOR OPERATION CHECKING
NO
1
2
ADJUSTMENT POINT
H•V PROTECTOR
OTHER
PROTECTOR
ADJUSTMENT CONDITION / PROCEDURE
(1) Receive "Monoscope Pattern" signal.
(2) Connect output of Bias Box to D757 cathode
(3) Set voltage of Bias Box to 18V and make sure the
protector is not work.
(4) Set voltage of Bias Box to 27V, and make sure the
protector is work.
(1) Once finish rectified Electrolytic Capacitor short testing
in + B line, check all possible damaged components on
+B line.
(Use random selected set for inspection)
WAVEFORM OR OTHERS
A/V INPUT AND OUTPUT CHECKING
NO
1
2
3
4
5
6
7
ADJUSTMENT POINT
AV
OUTPUT CHECK
AV-1
INPUT CHECK
AV-2
INPUT CHECK
Component
(50Hz 60Hz 480p 576p)
INPUT CHECK
REAR S-Terminal
INPUT CHECK
FRONT
INPUT CHECK
FRONT S-Terminal
INPUT CHECK
ADJUSTMENT CONDITION / PROCEDURE
(1) Receive the "PAL Colour Bar" signal (100% White
Colour Bar, Sound 400Hz 100% Mod)
(2) Terminate the Video output with a 75 ohm impedance.
Make sure the output is as specified (1.0 Vp-p
±
3dB)
(3) Terminate the Audio output with a 10 Kohm impedance.
Make sure the output is as specified (1.77 Vp-p
±
3dB)
Check of AV
Check of AV
Check of AV
Check of AV
Check of AV
Check of AV
WAVEFORM OR OTHERS
50
Adjust these Horizontal
and Vertical lines