11 MTS circuit adjustment
The MTS circuit adjustment require two steps:
1. Input level adjustment.
2. Stereo separation adjustment.
Input level adjustment
Service DAC adjustment (MTSIN)
PREPARATION
1. Connect an RMS meter with filter jig as shown in figure
to TP1105 or TP1107 and gound.
2. Connect an RF sigal generator to the RF antenna Input.
PROCEDURE
1. Apply the following signal from the RF signal generator.
•
Video: flat field, 30% modulation (70±5dB, 75 ohm
OPEN, P/S 10dB).
•
Audio:
300Hz,
100%
modulation,
monaural
(70±5dB, 75 ohm OPEN, P/S 10dB.) Make sure that
the 75µs pre-emphasis is OFF.
2. Adjust the MTS input level adjustment “MTSIN” data
until the RMS voltage measured is 106mVrms ±
6.0mVrms.
Stereo separation adjustment (SEPAH)
PREPARATION
1. Connect an R.F. signal generator to the RF antenna
input.
2. Connect a scope to TP1104 or TP1106 and ground.
PROCEDURE
1. Select stereo mode in audio menu.
2. Apply the following signal from the RF signal generator.
•
Video: flat field, 30% modulation.
•
Audio: 300Hz, 30% modulation, stereo (left only)
(70±5dB, 75 ohm OPEN, P/S 10dB.)
Note: After setting 30% modulation with P.L. SW
and N.R. SW OFF, turn P.L. SW and N.R. SW ON.
3. In service mode, adjust the MTS Low-Level separation
adjustment “SEPAL” data until the amplitude displayed
on the scope is minimum.
4. Apply the following signal from the RF signal generator.
•
Video: flat field, 30% modulation.
•
Audio: 300Hz, 30% modulation, stereo (left only)
(70±5dB, 75 ohm OPEN, P/S 10dB.)
Note: After setting 30% modulation with P.L. SW
and N.R. SW OFF, turn P.L. SW and N.R. SW ON.
5. Adjust the MTS High-level separation adjustment
“SEPAH” until the amplitude displayed on the scope is
minimum.
6. Repeat above steps 2 through 5 until the amplitude is at
minimum for both signals.
13
Summary of Contents for TC-23LX60, TC-26LX60C, TC-26LX60L, TC-32LX60C, TC-32LX60L
Page 7: ...6 Location of controls EUR7613Z90R or EUR7613ZE0 7 ...
Page 12: ...10 Measurements and Adjustments 10 1 White Balance Adjustment 12 ...
Page 14: ...12 Boards Assemblies 12 1 AP Board 14 ...
Page 15: ...12 2 A Board 15 ...
Page 16: ...12 3 P Board 16 ...
Page 17: ...12 4 G Board 17 ...
Page 18: ...12 5 V Board 18 ...
Page 19: ...13 Block Diagram 13 1 Block Diagram for P and AP DC DC CONV 1 of 2 19 ...
Page 22: ...14 Schematic Diagrams 14 1 Schematic Diagram Notes 22 ...
Page 23: ...14 2 Reference of PDF links color 23 ...
Page 24: ...14 3 A Board 1 of 8 Schematic Diagram 0 1 2 3 4 5 666666 6786 6666669 0 0 666669 3 69 3 24 ...
Page 25: ...14 4 A Board 2 of 8 Schematic Diagram 0 1 2 3 4 5 666666 6786 6666669 0 0 666669 3 69 3 25 ...
Page 26: ...14 5 A Board 3 of 8 Schematic Diagram 0 1 2 3 4 5 666666 6786 6666669 0 0 666669 3 69 3 26 ...
Page 27: ...14 6 A Board 4 of 8 Schematic Diagram 0 1 2 3 4 5 666666 6786 6666669 0 0 666669 3 69 3 27 ...
Page 28: ...14 7 A Board 5 of 8 Schematic Diagram 0 1 2 3 4 5 666666 6786 6666669 0 0 666669 3 69 3 28 ...
Page 29: ...14 8 A Board 6 of 8 Schematic Diagram 0 1 2 3 4 5 666666 6786 6666669 0 0 666669 3 69 3 29 ...
Page 30: ...14 9 A Board 7 of 8 Schematic Diagram 0 1 2 3 4 5 666666 6786 6666669 0 0 666669 3 69 3 30 ...
Page 31: ...14 10 A Board 8 of 8 Schematic Diagram 0 1 2 3 4 5 666666 6786 6666669 0 0 666669 3 69 3 31 ...
Page 32: ...14 11 AP Board 1 of 3 Schematic Diagram 0 1 2 3 4 5 6666666 6786 6666669 A 66666669 3 69 3 32 ...
Page 33: ...14 12 AP Board 2 of 3 Schematic Diagram 0 1 2 3 4 5 6666666 6786 6666669 A 66666669 3 69 3 33 ...
Page 34: ...14 13 AP Board 3 of 3 Schematic Diagram 0 1 2 3 4 5 666666 6786 6666669 A 66666669 3 69 3 34 ...
Page 35: ...14 14 V Board Schematic Diagram 0 1 2 B3 4 5 66666669 A 66666669 3 69 3 35 ...
Page 36: ...14 15 G Board Schematic Diagram 36 ...
Page 37: ... 0 1 2 3 4 5 66666669 66666669 3 69 3 37 ...
Page 42: ...16 Parts Location LCD TV Exploded View 16 1 Packing Exploded View Package contents 42 ...
Page 43: ...17 Parts list 17 1 Description of abbreviations guide 43 ...
