Sony Glasstron PLM-S700E, Руководство по обслуживанию

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3-7
VIDEO BLOCK
To adjust the video block, connect a pattern generator as shown
below. As video input signals for adjustment, enter video output
signals (color bar signals), unless otherwise specified.
Preparation:
Page Address Data
Sub-Color
PAL F 54 5B
(NTSC) (F) (54) (80)
Switch the PAL F 14 01
Signal mode (NTSC) (F) (14) (00)
[4fsc FreeRun Adjustment]
Condition:
Input signal No signal
Measurement point YC-148 board CN1003 pin
4
Measuring equipment Frequency Counter
Adjustment page F
Adjustment address 55
Specification value 17.73450 MHz ± 20 Hz (PAL)
Connection:
Adjustment Procedure:
(1)
Connect a frequency counter to the CN1003 pin
4
on the
YC-148 board.
(2) Set (or confirm) data: 01 to page: 0, address: 01.
(Cancel F page protect)
(3) On page: F, address: 55, change data with the PLAY and
STOP buttons and press the PAUSE button to write data so
that the frequency counter reading satisfies the specification
value.
Adjustment and Adjustment Parts: YC-148 board (see page 3-15)
[Video Mute Level Adjustment]
Condition:
Input signal All black (IRE 0%) signal (No set up)
Measurement point YC-148 board CN1003 pin
7
Measuring equipment Oscilloscope
Adjustment page F
Adjustment address 52
Specification value 0 ± 0.03 Vp-p
Connection:
Adjustment Procedure:
(1)
Connect a oscilloscope to the CN1003 pin
7
on the YC-148
board.
(2) Set (or confirm) data: 01 to page 0, address 01. (Cancel F
page protect)
(3) On page F, address: 52, change data with the PLAY and STOP
buttons and press the PAUSE button to write data so that the
A
level of wafeform on the oscilloscope satisfies the speci-
fication value.
Adjustment and Adjustment Parts: YC-148 board (see page 3-15)
VIDEO IN jack (J1002)
Pattern Generator
Set
CN1003 pin
4\
(4FSC)
YC-148 Board
Frequency Counter
+
–
+
–
Oscilloscope
(DC range)
CN1003 pin
7
(YOUT)
CN1003 pin
1
(GND)
YC-148 Board
9H 10H 25H
24H 11H
A