Analog Audio Inputs (Ch3/4) Adjustment (Apr-13 Board); Analog Audio Inputs (Ch3/4) Adjustment (Apr-13 Board); Input Level Adj - Sony DNW-A100 Maintenance Manual
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3-6. Audio System Adjustment (APR-12/13 Boards)
3-6-5. Analog Audio Inputs (CH3/4) Adjustment (APR-13 Board)
3-6-5. Analog Audio Inputs (CH3/4)
Adjustment (APR-13 Board)
n
When the VTR equipped with BKNW-105 (optional kit),
Section 3-6-5 is not needed.
Preparing tools
. Audio signal generator:
TEKTRONIX SG505-option 02 or equivalent
. Audio analyzer:
TEKTRONIX AA501A-option 02 or equivalent
. Extension board: EX-556 (Part No. A-8277-212-A)
. Shorting clip
Preparation
1. Check that the shorting plug settings on the
APR-13 board are the factory settings.
(Refer to "Shorting plugs setting" in Section 3-6-2.)
2. Extend the APR-13 board with an extension
board EX-556.
n
Wait more than 30 seconds after turning off the power,
then remove the APR-13 board.
3. Check the settings on the upper control panel.
PB (audio level) controls:
REC (audio level) controls: CH3 8 PRESET
AUDIO INPUT SELECT 8 ANALOG/AES/EBU
4. Check the setting on the sub control panel.
EMPHASIS switch
5. Check the settings on the connector panel.
AUDIO INPUT LEVEL switches:
CH3 8 HIGH/ON 600Z (right position)
CH4 8 HIGH/ON 600Z (right position)
6. Check that the equipment has warmed up.
Before starting the adjustment, warm up the VTR and
other equipment through the power for 20 minutes or
more.
3-22
CH3 8 PRESET
CH4 8 PRESET
CH4 8 PRESET
8 OFF
1. Input Level Adjustment
1. Set the audio analyzer as follows:
Function mode: LEVEL, dBm (600 Z)
Input filter:
80 kHz LPF
CH3 adjustment
2. Short-circuit TP100(B-1) and E100(B-2) on the APR-
13 board with a shorting clip.
3. Input the audio signal (1 kHz, +4.0 dBm) to AUDIO
INPUT CH3 connector.
4. Connect the audio analyzer's input to AUDIO OUT-
PUT CH3 connector.
5. Adjust the audio level on the audio analyzer.
1RV100/APR-13(B-1)
Adj. point:
Specification: +4.0 ± 0.1 dBm (at 600 Z load)
6. Remove the shorting clip on the APR-13 board.
7. Adjust the audio level on the audio analyzer.
1RV101/APR-13(C-1)
Adj. point:
Specification: +4.0 ± 0.1 dBm (at 600 Z load)
CH4 adjustment
8. Short-circuit TP200(F-1) and E200(E-2) on the APR-
13 board with a shorting clip.
9. Input the audio signal (1 kHz, +4.0 dBm) to AUDIO
INPUT CH4 connector.
10. Connect the audio analyzer's input to AUDIO OUT-
PUT CH4 connector.
11. Adjust the audio level on the audio analyzer.
1RV200/APR-13(E-1)
Adj. point:
Specification: +4.0 ± 0.1 dBm (at 600 Z load)
12. Remove the shorting clip on the APR-13 board.
13. Adjust the audio level on the audio analyzer.
1RV201/APR-13(F-1)
Adj. point:
Specification: +4.0 ± 0.1 dBm (at 600 Z load)
A
B
C
A No.
RV101
RV102
TP100
RV100
TP101
COR100
+4
–3
0
–20
E100
COR101
RV103
16 18 20
COR300
COR400
COR500
RV300
RV400
20 18 16
20 18 16
20 18 16
TP300
TP400
COR301
COR401
–20
–20
–3
–3
0
0
+4
+4
APR-13 Board (Side A)
D
APR–13
E
F
G
LOTNO,
S NO,
RV201
RV202
RV200
TP200
COR200
TP201
+4
–3
0
–20
E200
COR201
RV203
16 18 20
TP803
TP801
TP804
TP802
E800
COR600
RV500
RV600
20 18 16
TP500
TP600
COR501
COR601
–20
–20
–3
–3
TP701
0
0
+4
+4
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
1
2
3
4
5
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