Sony Ipela SNC-CS50N, Руководство по обслуживанию

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2-10 (E)
SNC-CS50N/CS50P
A
GND
TP2
CN2
CN1
TP1
B
2-3-4. Confirmation of 0 dB Adjustment
1. Shoot a 100% white pattern using this unit.
2. Connect the probe of an oscilloscope to TP1 on the
adjustment tool board.
3. Set the lens iris so that waveform level A satisfies the
specifications.
Object:
100% white pattern
Confirming equipment: Oscilloscope
(50 mVAC, 10
µ
s)
Confirmation point: TP1 on adjustment tool board
Specifications: A = 250
±
20 mV
n
Measure value A according to the center of noise.
Oscilloscope
4. Change the connection of an oscilloscope and connect
it to TP2 on the adjustment tool board.
5. Confirm that waveform level B satisfies the
specifications.
Object: 100% white pattern
Confirming equipment: Oscilloscope
(100 mVAC, 10
µ
s)
Confirmation point: TP2 on adjustment tool board
Specifications: B = 400
±
20 mV
n
Measure value B according to the center of noise.
Oscilloscope
Adjustment tool board
2-3-5. Confirmation of Color Reproduction
Adjustment
1. Shoot a color-bar chart using this unit.
2. Adjust the lens iris and set the white video level of a
VIDEO OUT signal.
Object: Color-bar chart
Confirming equipment: Waveform monitor
Confirmation point:
White video level of
VIDEO OUT
Setting value: 90
±
2.5 IRE (NTSC)
640
±
18 mV (PAL)
3. Confirm that the center of all luminescent spots is put
in each color reproduction frame.
Object: Color-bar chart
Confirming equipment: Vectorscope
Confirmation point:
White video level of
VIDEO OUT
Specifications: The center of all luminescent
spots must be put in each
color reproduction frame.
n
Adjustment can be normally performed if there is a point at
which a lens iris can be changed in the range of the
specifications in step 2 and that satisfies the specifications
in step 3.