System Control Adjustment; (Tp-61 Board); Video System Adjustment - Sony DVP-F5 Service Manual

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7-2. SYSTEM CONTROL ADJUSTMENT

(TP-61 Board)

1. Free Run Level Sync Frequency (or 19.98 MHz)
Adjustment (TP-61 board)
Purpose
This is the reference clock for the MPEG system. If this adjustment
is not performed, an error may occur during lock check.
Mode
Measurement Point
Instrument
Adjustment element
Specifications
Adjustment method
1) Connect the frequency counter to JL1302.
2) Adjust RV1302 to attain 15.73 V ± 0.6 KHz.
2. Display Position Adjustment (TP-61 Board)
Mode
Signal
Instrument
Adjustment element
Specifications
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Adjustment method
1) Play back the monoscope of TEST DISK HLK510.
2) Adjust RV1301 so that the image is on the center of the LCD
or monitor.
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JL1302 (JL1301)
Frequency counter
RV1302
15.73 V ± 0.6 KHz (PLL: 19.98 MHz)
Playback
Monoscope
LCD or monitor
RV1301
Display should be on the center.
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7-3. VIDEO SYSTEM ADJUSTMENT

1. Video Level Adjustment (MB-90 Board)
Purpose
This adjustment is made to satisfy the standard, and if not adjusted
correctly, the brightness will be too large or small.
Mode
Signal
Measurement point
Instrument
Adjustment element
Specifications
Checking method
1) In the test mode initial menu "Video Level Adjustment", set so
that internal color bars are generated.
2) Adjust RV651 to attain 1.00
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2. S-terminal Y Output Check (MB-90 Board)
Purpose
This checks S-terminal video output Y. If it is incorrect, correct
brightness will not be attained when connected to, for instance,
projector of the S-terminal input.
Mode
Signal
Measurement point
Instrument
Specifications
Checking method
1) Play back TEST DISK HLK510 Title2.
2) Confirm that the S-Y level is 1.00 ± 0.05 Vp-p.
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Test mode "Video level Adjustment"
Color bars (100%)
J351 (terminated at 75Ω)
Oscilloscope
RV651
+ 0.04
1.00 Vp-p
− 0.02
+ 0.04
Vp-p.
− 0.02
1 ± 0.02 Vp-p
Fig. 7-1
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TEST DISK HLX510 Title 2
Color bars
J352 S-terminal Y output
(terminated at 75Ω)
Oscilloscope
1.00 ± 0.05 Vp-p
1.00 ± 0.05 Vp-p
Fig. 7-2
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