Sony Betacam SX DNW-A100 Maintenance Manual page 288

6-4. DM-89 Board Replacement
(4) Change the connection of the oscilloscope as follows:
CH-1: TP5/DM-89(D-1), GND: E702/DM-89(D-1)
CH-2: TP305/DM-89(C-4), GND: E303/DM-89(B-1)
(5) OXIDE C adjustment
Playback the pulse & bar signal portion (9:00 to 11:00) of the alignment tape CR5-2A or CR5-2A PS,
and perform the adjustment.
(DNW-A100/A50/A45: CR5-2A, DNW-A100P/A50P/A45P: CR5-2A PS)
Adjustment points: 1RV307/DM-89(F-5) and 1RV308/DM-89(F-5)
Specification: B > 35 dB
fc
2fc
4.9 MHz 9.8 MHz
DNW-A100/A50/A45
(6) Eject the alignment tape CR5-2A/CR5-2A PS.
(7) METAL C adjustment
Playback the flat field signal portion (24:00 to 26:00) of the alignment tape CR5-1B or CR5-1B PS,
and perform the adjustment.
(DNW-A100/A50/A45: CR5-1B, DNW-A100P/A50P/A45P: CR5-1B PS)
Adjustment points: 1RV305/DM-89(F-4) and 1RV306/DM-89(F-5)
Specification: C > 40 dB
fc
5.8 MHz
DNW-A100/A50/A45
(8) Stop the playback of the alignment tape CR5-1B/CR5-1B PS.
6-50
B
C
2fc
11.6 MHz
fc
2fc
4.9 MHz 9.8 MHz
DNW-A100P/A50P/A45P
fc
2fc
6.7 MHz 13.4 MHz
DNW-A100P/A50P/A45P
B
C
DNW-A100/A50/A45
DNW-A100P/A50P/A45P