Sony DNW-A100 Maintenance Manual page 64

3-6. Audio System Adjustment (APR-12/13 Boards)
3-6-9. LAU PB System Adjustment (APR-12 Board)
1. LAU Dolby Level Rough Adjustment
CH1 adjustment
1. Connect the audio level meter to TP501(C-1) on the
APR-12 board. GND: E500/APR-12(B-1)
2. Play back the 1 kHz, 0 VU portion (0:00 to 2:55) of
the following alignment tape in PLAY mode.
For DNW-A100/A50/A45:
For DNW-A100P/A50P/A45P: CR8-1B PS
3. Adjust the audio level on the audio level meter.
Adj. point: 1RV503/APR-12(C-1)
Specification: _10.0 ± 0.5 dBu (0 dBu = 0.775 V rms)
CH2 adjustment
4. Connect the audio level meter to TP601(E-1) on the
APR-12 board. GND: E600/APR-12(F-1)
5. Play back the 1 kHz, 0 VU portion (0:00 to 2:55) of
the alignment tape CR8-1A / CR8-1B PS in PLAY
mode.
6. Adjust the audio level on the audio level meter.
1RV604/APR-12(E-1)
Adj. point:
Specification: _10.0 ± 0.5 dBu (0 dBu = 0.775 V rms)
A B C
A No.
E500
RV504
RV502
TP501
TP500
RV500
S500
RV503
RV501
COR100
RV103
TP101
RV100
COR101
+4 –3
0 –20
20 18 16
RV101
RV102 E100
TP100
COR300
16 18 20
COR301
UNITY (L) VAR (L)
COR302
+4
TP300
0
–3 >EP–GW<
–20
RV300
E300
APR-12 Board (Side A)
3-28
CR8-1A
D APR–12 E F G
LOTNO, S NO,
E600
RV605
TP601
RV602
TP600
RV603 RV600
S600
RV604
RV601
COR200
RV203
TP201
RV200
COR201
+4 –3
0 –20
20 18 16 E200
RV201
RV202
TP200
TP700 TP560
COR400
16 18 20
COR401
UNITY (R) VAR (R)
COR402
+4
TP400
0
–3
–20
RV400
E400
TP701
2. LAU PB Level Rough Adjustment
1. Set the audio analyzer as follows:
Function mode: LEVEL, dBm (600 Z)
Input filter:
CH2 adjustment
2. Connect the audio analyzer's input to AUDIO OUT-
PUT CH2 connector.
When the VTR is equipped with BKNW-105 (optional
kit), connect the audio analyzer to MONITOR OUT-
PUT R connector.
3. Play back the 1 kHz, 0 VU portion (0:00 to 2:55) of
the following alignment tape in PLAY mode.
For DNW-A100/A50/A45:
For DNW-A100P/A50P/A45P: CR8-1B PS
4. Adjust the audio level on the audio analyzer.
1RV605/APR-12(F-1)
Adj. point:
Specification: +4.0 ± 0.5 dBm (at 600 Z load)
CH1 adjustment
5. Connect the audio analyzer's input to AUDIO OUT-
PUT CH1 connector.
When the VTR is equipped the BKNW-105, connect it
to MONITOR OUTPUT L connector
6. Play back the 1 kHz, 0 VU portion (0:00 to 2:55) of
the CR8-1A or CR8-1B PS in PLAY mode.
7. Adjust the audio level on the audio analyzer.
1RV504/APR-12(B-1)
Adj. point:
Specification: +4.0 ± 0.5 dBm (at 600 Z load)
3. LAU PB Frequency Response Adjustment
1
n
In the DNW-A100/A50/A45 are not performed the adjust-
2
ments using the metal particle tape.
3
1. Set the audio analyzer as follows:
Function mode: dB RATIO
4
Input filter:
5
6
7
80 kHz LPF
CR8-1A
80 kHz LPF
DNW-A100/A50/A45
DNW-A100P/A50P/A45P