Sony MAV-555, Руководство по обслуживанию

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4-14 (E)
MAV-555
4-6. AD-160 Board Adjustment
m
.
Allow 30 minutes or more of warm up of MAV-555 and
measurement equipment before starting adjustments.
.
Be sure that the EM-1 Board has already been completed
of its adjustment.
4-6-1. Analog Audio Offset Adjustment
Preparation
.
AUDIO REC/PB level control knobs (CH-1 to CH-4)/
meter panel
→
PRESET
.
COR501 (C-2)/AD-160 board
→
+
4
.
COR502 (C-2)/AD-160 board
→
20
.
COR601 (E-2)/AD-160 board
→
+
4
.
COR602 (E-2)/AD-160 board
→
20
.
COR701 (H-2)/AD-160 board
→
+
4
.
COR702 (G-2)/AD-160 board
→
20
.
COR801 (J-2)/AD-160 board
→
+
4
.
COR802 (K-2)/AD-160 board
→
20
.
AUDIO INPUT CH-1 LEVEL switch/BKMA-570
→
HIGH/ON (600
Z
)
.
AUDIO INPUT CH-2 LEVEL switch/BKMA-570
→
HIGH/ON (600
Z
)
.
AUDIO INPUT CH-3 LEVEL switch/BKMA-570
→
HIGH/ON (600
Z
)
.
AUDIO INPUT CH-4 LEVEL switch/BKMA-570
→
HIGH/ON (600
Z
)
.
S300-1 (H-1)/EM-1 board
→
ON
Setting the setup menu
.
Set the setup menu “010-525/625” to “525/60”.
.
Set the setup menu “804 AUDIO HEAD ROOM” to “20 dB”.
.
Set the setup menu “882 EMPHASIS ON/OFF R1” to
“OFF”. (When the R1 port is used)
.
Set the setup menu “883 EMPHASIS ON/OFF R2” to
“OFF”. (When the R2 port is used)
Adjustment Procedure
CH-1 adjustment
1. Short TP502 (B-3) /AD-160 board and E501 (B-3) /
AD-160 board using a shorting clip.
2. Connect and setup an oscilloscope as follows.
CH-1 :
TP408 (E-4) /AD-160 board, DC 5 V/
DIV
GND : E401(F-4)/AD-160 board
CH-2 : TP407 (C-4) /AD-160 board, DC 5 V/
DIV
TIME : 2
u
s/DIV
TRIG : CH-2, + slope
BW Limit : ON (20 MHz)
3. Equipment : Oscilloscope
Test point : TP408 (E-4)/AD-160 board
Adj. point :
1
RV504 (D-3)/AD-160 board
Spec. : As specified by the waveform of TP408
(AUDIO CH-1) shown on the next page.
4. Remove the shorting clip from AD-160 board TP502
and E501.
CH-2 adjustment
1. Short TP602 (F-3) /AD-160 board and E501 (B-3) /
AD-160 board using a shorting clip.
2. Connect and set an oscilloscope as follows.
TRIG :
CH-2,
_
slope
3. Equipment : Oscilloscope
Test point : TP408 (E-4)/AD-160 board
Adj. point :
1
RV604 (D-3)/AD-160 board
Spec. : As specified by the waveform of TP408
(AUDIO CH-2) shown on the next page.
4. Remove the shorting clip from AD-160 board TP602
and E501.
CH-3 adjustment
1. Short TP702 (G-3) /AD-160 board and E801 (L-3) /
AD-160 board using a shorting clip.
2. Connect and set an oscilloscope as follows.
CH-1 :
TP409 (J-4) /AD-160 board
TRIG : CH-2,
+
slope
3. Equipment : Oscilloscope
Test point : TP409 (J-4)/AD-160 board
Adj. point :
1
RV704 (J-3)/AD-160 board
Spec. : As specified by the waveform of TP409
(AUDIO CH-3) shown on the next page.
4. Remove the shorting clip from AD-160 board TP702
and E801.
4-6. AD-160 Board Adjustment
S300
1
2
3
4
5
6
7
8
A B C D E F G H J K L
EM-1 board (A side)