7-2
2. S-terminal Output Check
<Purpose>
Check S-terminal video output. If it is incorrect, pictures will not
be displayed correctly in spite of connection to the TV with a S-
terminal cable.
Mode
Video level adjustment in test mode
Signal
Color bars
Test point
S VIDEO OUT (S-Y) connector
(75
Ω
terminated)
Instrument
Oscilloscope
Specification
1.00 ± 0.05 Vp-p
Checking method:
1) Confirm that the S-Y level is 1.00 ± 0.05 Vp-p.
Figure 7-2
3. Checking Component Video Output B-Y
<Purpose>
This checks component video output B-Y. If it is incorrect, correct
colors will not be displayed when connected to, for instance, pro-
jector.
Mode
Video level adjustment in test mode
Signal
Color bars
Test point
COMPONENT VIDEO OUT (B-Y)
connector (75
Ω
terminated)
Instrument
Oscilloscope
Specification
700 ± 50 mVp-p
Checking method:
1) Confirm that the B-Y level is 700 ± 50 mVp-p.
Figure 7-3
7-2. ADJUSTMENT OF SYSTEM CONTROL
1. System Clock 27 MHz Adjustment (VP-52 BOARD)
<Purpose>
27 MHz is the reference clock for the MPEG system, and if it is
not adjusted correctly, checking of 22 MHz and 33 MHz lock in
the following steps will result in NG.
Mode
E-E
Test point
CN103 pin
1
Instrument
Digital voltmeter
Adjusting element
CT101
Specification
2.5 ± 0.1 V
Adjusting method:
1) Adjust CT101 to attain 2.5 ± 0.1 V.
7-3. ADJUSTMENT OF VIDEO SYSTEM
1. Interface Video Output Level Adjustment
(VP-52 BOARD)
<Purpose>
This adjustment is made to satisfy the NTSC standard, and if not
adjusted correctly, the brightness will be too large or small.
Mode
Video level adjustment in test mode
Signal
Color bars
Test point
VIDEO OUT connector
(75
Ω
terminated)
Instrument
Oscilloscope
Adjusting element
RV102
Specification
1.00
Vp-p
Adjusting method:
1) In the test mode initial menu “6” Video Level Adjustment, set
so that color bars are generated.
2) Adjust the RV102 to attain 1.00
Vp-p.
Figure 7-1
700 ± 50 mVp-p
1.00 ± 0.05 Vp-p
+ 0.04
– 0.02
1.00
Vp-p
+ 0.04
– 0.02
+ 0.04
– 0.02
