13
LZ-800W
ADJUSTMENT
1. Set to TEST mode
2. Free run frequency
adjustment
3. Screen display start
position adjustment
4. Input signal
5. Gamma curve
adjustment
• Must be in TEST mode.
• No input video
• Monoscope
• To the mother (X14)
VIDEO input.
• Input signal
Composite input
(10 step signal)
• Set to AC range
• Oscilloscope 0.5V/DIV
• Input signal
Composite input
(10 step signal)
• Set to AC range
• Oscilloscope 0.5V/DIV
• Input signal
Composite input
(10 step signal)
• Set to AC range
• Oscilloscope 0.5V/DIV
• Pressing the (SCREEN) and (VOL+) keys set the (RESET) key ON.
• Set to VIDEO mode.
• Using VR201 set the HYS frequency when no input is present to
15.734kHz
±
0.01kHz.
• With a monoscope adjust for left/right equality with VR200.
Alternatively, adjust VR200 so that the phase difference between the fall
of HSY from the timing controller IC and SYNC rise is about 2.1
µ
Sec.
• Feed composite SYNC (10 step signal) into the SYNC input.
(1) Adjust RGB AMP VR301 so the SYNC-SYNC interval is 4.0
±
0.1Vp-p.
(2) Adjust VR306, 305 and 304 so GAMMA0, GAMMA2 and CONTRAST
are 3.5V
±
0.1V.
(3) Adjust BLACK adjustment VR300 so the 4th step from the pedestal is
3.0V
±
0.1V.
(4) Adjust GAMMA0 VR306 so the 3rd step from the pedestal is 1.0V
±
0.1V.
(5) Adjust BLACK adjustment VR300 so the 4th step from the pedestal is
2.0V
±
0.1V.
CAUTION: There are two points where 2V can be obtained, but please
ensure you turn VR300 to the right.If you obtain 2V by turning VR300
to the left, you will not be able to perform adjustment (6).
Item
Adjustment method/Adjustment value
Conditions
X35 Gamma Timing Controller Circuit Adjustment Specification
5
3.0V
SYNC
SYNC
4.0V
4.0V
1.0V
5
0.7V
Power Supply Voltage: 14.4V
4.0V
2.0V