10
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MTS ADJUSTMENT
MTS Level Adjustment
1. Feed the following monaural signal to pin (14) of
IC3001.
Monaural signal: 300Hz, 245mVrms
2. Connect the rms voltmeter to pin (39) of IC3001.
3. Enter the service mode and select the service
adjustment "M01".
4. Adjust the data so that the rms voltmeter reads 490
±10mVrms.
Separation Adjustment
1. Connect the rms voltmeter to pin (39) of IC3001.
2. Receive the following composite stereo signal 1.
Composite stereo signal: 30% modulation, left
channel only, noise reduction on, 300Hz
3. Enter the service mode and select the service
adjustment "M04".
4. Adjust the data until the AC voltage reading of the
rms voltmeter is minimum.
5. Receive the following composite stereo signal 2.
Stereo signal: 30% modulation, left channel only,
noise reduction on, 3kHz
6. Enter the service mode and select the service
adjustment "M05".
7. Adjust the data until the AC voltage reading of the
rms voltmeter is minimum.
8. Take the above steps 1 thru 7 again for fine
adjustment.
Vertical-Size, V-Linearity and
V-S Correction Adjustments
1. Receive a good local channel.
2. Enter the service mode DEF category and select the
adjustment "D02" for Vertical Size, "D05" for V-
Linearity and "D06" for V-S Correction Adjustment.
3. Set in order "D05" for V-Linearity, "D06" for V-S
Correction and set the data to get the best linearity.
4. Then adjust "D02" data until it become a proper
vertical size.
Horizontal Position Adjustment
1. Receive a good local channel.
2. Enter the service mode DEF category and select the
adjustment "D01".
3. Adjust "D01" data value to center the picture.
Vertical-Phase Adjustment
1. Receive a good local channel.
2. Enter the service mode DEF category and select the
adjustment "D03".
3. Adjust "D03" bus data to get the most acceptable
vertical position.
Note: The step range is 20 (32)+12 (3 steps)/
-20 (5 steps).
(Push once move 4 steps.)
Caption Position Adjustment (Horizontal)
1. Receive a good local channel.
2. Enter the service mode DEF category and select the
adjustment "D04".
3. A black text box will appear on the screen. (see Figure
C. below)
4. Adjust "D04" data value to balance the text box
position in the center. (A=B).
Figure C.
27C241
Summary of Contents for 27C24
Page 11: ...11 6 5 4 3 2 1 A B C D E F G H CHASSIS LAYOUT 27C241 ...
Page 12: ...12 6 5 4 3 2 1 A B C D E F G H BLOCK DIAGRAM 27C241 ...
Page 14: ...14 8 6 5 4 3 2 1 A B C D E F G H SCHEMATIC DIAGRAM MAIN 1 Unit 27C241 10 7 9 ...
Page 15: ...15 17 16 19 18 15 14 13 12 11 10 27C241 ...
Page 16: ...16 8 7 10 9 6 5 4 3 2 1 A B C D E F G H SCHEMATIC DIAGRAM MAIN 1 Unit 27C241 ...
Page 17: ...17 17 16 19 18 15 14 13 12 11 10 27C241 ...
Page 18: ...18 6 5 4 3 2 1 A B C D E F G H SCHEMATIC DIAGRAM CRT Unit 27C241 ...
Page 20: ...20 6 5 4 3 2 1 A B C D E F G H PWB A MAIN Unit Chip Parts Side 27C241 ...
Page 21: ...21 6 5 4 3 2 1 A B C D E F G H PWB B CRT Unit Wiring Side 27C241 ...