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X35 Gamma Timing Controller Circuit Adjustment Specification
Item
1. Set to TEST mode
• Pressing the (SCREEN) and (VOL+) keys set the (RESET) key ON.
• Set to VIDEO mode.
2. Free run frequency
• Using VR201 set the HYS frequency when no input is present to
adjustment
15.734kHz±0.01kHz.
3. Screen display start
• With a monoscope adjust for left/right equality with VR200.
position adjustment
Alternatively, adjust VR200 so that the phase difference between the fall
of HSY from the timing controller IC and SYNC rise is about 2.1µSec.
4. Input signal
• Feed composite SYNC (10 step signal) into the SYNC input.
5. Gamma curve
(1) Adjust RGB AMP VR301 so the SYNC-SYNC interval is 4.0±0.1Vp-p.
adjustment
(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
ADJUSTMENT
Adjustment method/Adjustment value
5
3.0V
4.0V
1.0V
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).
4.0V
5
0.7V
SYNC
4.0V
SYNC
2.0V
LZ-800W
Power Supply Voltage: 14.4V
Conditions
• 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
13
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