– 100 –
REC Y LEVEL CHECK
Mode
E-E(SP)
Signal
No signal
Measurement Point
MA10 board IC802
!•
pin
Measurement Equipment
Oscilloscope
Specified Value
240
±
70mVp-p(NTSC)
260
±
70mVp-p(PAL)
Check:
Confirm the Vp-p of the waveform is 220
±
70mVp-p.
Fig.3-7
REC CHROMA CHECK
240
±
70mVp-p (NTSC)
260
±
70mVp-p (PAL)
Mode
REC(SP)
Signal
Color bar
Measurement Point
MA10 board IC802
!¢
pin
Measurement Equipment
Oscilloscope
Specified Value
350
±
60mVp-p
Check:
Confirm the Vp-p of the waveform is 350
±
60mVp-p.
PB Y LEVEL CHECK
Mode
PB
Signal
Color bar
Measurement Point
MA10 board Q830 emitter
Measurement Equipment
Oscilloscope
Specified Value
1.0
±
0.1Vp-p
Check:
Confirm the Vp-p of the waneform is 1.0
±
0.1Vp-p.
SWITCHING LOCATION ADJUSTMENT
WHEN CHANGE DRUM
1.VIDEO SWITCHING LOCATION ADJUSTMENT
1) Connect between CN1004 pin
2
and pin
6
on MA10
board.
2) Insert switching over up tape(KRV-23PS)and push the play
back key.
3) Push the c and-keys simultaneously.
4) Short instant between CN1004 pin
1
and pin
6
.(LED goes
on and off)
Less than 30
µ
sec.
Fig.3-8
350
±
60mVp-p
Fig.3-9
1.0
±
0.1Vp-p
(Y Level)
5) Adjust the /- keys of the set so that waveform width
of CN702 pin
2
become minimum.(less than 30
µ
sec.)
6) Push the pause key of the set.(LED wink disappear)
7) Remove the connection between CN1004 pin
2
and pin
6
.
Fig.3-10
Summary of Contents for TRINITRON KV-VF21M70
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