User Manual

-74-
Electrical Adjustments
Equipment Oscilloscope
Input mode Analog TV mode
Input signal Color bar pattern
1. Adjust the amplitude "a" by using VR101 on the
tuner board.
Test Point
Adjustment value
(+) TPTV 1.0 ±0.03Vdc
(–) TUNER_GND
(a)
b TV video level adjustment
Equipment Oscilloscope
Input mode Analog TV mode
Audio mode Stereo mode
Input audio signal Multi sound program
1. Enter the service mode.
2. Adjust the amplitude of 4KHz at Audio output-(L) ter-
minal to become minimum level.
Item no. Test Point Adjustment value
751 (+) L audio output Minimum at 4KHz
(–) GND
3. Adjust the amplitude of 300Hz at Audio output-(R)
terminal to become minimum level.
Item no. Test Point Adjustment value
752 (+) R audio output Minimum at 300Hz
(–) GND
Minimum leakage
300Hz
Minimum leakage
4KHz
v TV stereo separation adjustment
Equipment Digital voltmeter
Input mode Analog TV mode
Input audio signal 1KHz 100% modulation
1. Enter the service mode.
2. Adjust the audio output amplitude at Audio output-(L)
terminal to become 400 ±10 mVac.
Item no. T
est Point Adjustment value
750 (+) L audio output 500 ±10 mVac
(–) GND
Note:
At the case with using an oscilloscope, adjust the
audio output amplitude at Audio output-(L) terminal to
become 1.41 ±0.02 Vp-p.
c TV sound level adjustment