Sony Betacam SX DNW-A100 Maintenance Manual page 256

6-2. APR-12 Board Replacement
5. LAU Dolby Level Adjustment
Measuring equipment: Audio level meter
CH1 adjustment
(1) Connect the audio level meter to TP501/APR-12(C-1).
GND : E500/APR-12(B-1)
(2) Playback the 1 kHz, 0 VU portion (0:00 to 2:55) of alignment tape CR8-1A or CR8-1B PS, and
perform the level adjustment.
(DNW-A100/A50/A45: CR8-1A, DNW-A100P/A50P/A45P: CR8-1B PS)
Adjustment point: 1RV503/APR-12(C-1)
_10.0 ± 0.2 dBu (0 dBu = 0.775 Vrms)
Specification:
CH2 adjustment
(1) Connect the audio level meter to TP601/APR-12(E-1).
GND : E600/APR-12(F-1)
(2) Playback the 1 kHz, 0 VU portion (0:00 to 2:55) of alignment tape CR8-1A or CR8-1B PS, and
perform the level adjustment.
(DNW-A100/A50/A45: CR8-1A, DNW-A100P/A50P/A45P: CR8-1B PS)
Adjustment point: 1RV604/APR-12(E-1)
_10.0 ± 0.2 dBu (0 dBu = 0.775 Vrms)
Specification:
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)
6-18
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
E200
20 18 16
RV201
RV202
TP200
TP700 TP560
COR400
16 18 20
COR401
UNITY (R) VAR (R)
COR402
+4
TP400
0
–3
–20
RV400
E400
TP701
1
2
3
4
5
6
7
DNW-A100/A50/A45
DNW-A100P/A50P/A45P