Sony Trinitron KV-VF14M40 Service Manual page 63

X'tal OSC CHECK
Mode
Signal
Measurement Point
Measurement Equipment
Specified Value
Check: 1)Confirm the frequency is 3.579545MHz±82Hz(NTSC), and
4.433619MHz±100Hz(PAL).
2)Confirm the waveform amplitude is 500±200mVp-p.
SYNC AGC CHECK
Mode
Signal
Measurement Point
Measurement Equipment
Specified Value
Check: Confirm the waveform amplitude is 1.0±0.1Vp-p.
http://cxema.ru
PB
Alignment tape, Stair step
MA10 board Q823 emitter(NTSC)
IC802 %ªpin(PAL)
Oscilloscope
500±200mVp-p
500 ± 200mVp-p
3.579545MHz ± 82Hz (NTSC)
4.433619MHz ± 100Hz (PAL)
Fig.3-3
E-E
Color bar
MA10 board Q830 emitter
Oscilloscope
1.0±0.1Vp-p
1.0 ± 0.1Vp-p
Fig.3-4
CARRIER DEVIATION CHECK
Mode
Signal
Measurement Point
Measurement Equipment
Specified Value
Check: Confirm f
-f =1.00±0.08MHz
2 1
Confirm f =3.40±0.13MHz(NTSC), and
1
3.80±0.13MHz(PAL)
f
1
WHITE/DARK CLIP CHECK
Mode
Signal
Measurement Point
Measurement Equipment
Specified Value
Preparation: Add 3.3kΩ resistor between IC802 $™pin and GND.
Check: Taking the height from sync to white level as 100%, check
white clip and dark clip.
– 75 –
E-E
Color bar
MA10 board IC802 !•pin
Spectrum Analyzer
f -f =1.00±0.08MHz
2 1
f
2
Fig.3-5
E-E
Color bar
MA10 board IC802 #¶pin
Oscilloscope
190±20%(White), 55±20%(Dark)
White clip
100%
Dark clip
Fig.3-6