Sony Betacam SX DNW-A100 Maintenance Manual page 281

OXIDE Y adjustment [to step (56)]
(42) Turn RV103/DM-89 (E5) counter clockwise fully when is exist.
n
RV103 is not equipped on the DM-89 board of the LOT Nos. 407 and higher.
(43) Short-circuit TP4/DM-89(E-1) and E702/DM-89(D-1) with a shorting clip.
(44) Connect the output of network analyzer to TP103/DM-89(E-6). GND: E103/DM-89(F-6)
(45) Connect the oscilloscope's CH-2 to TP104/DM-89(F-5). GND: E104/DM-89(G-5)
(46) OXIDE Y, Group delay adjustment
Adjust the delay time at 8 MHz use 4 MHz as the reference.
Adjustment point: 1RV104/DM-89(E-5)
Specification: DNW-A100/A50/A45:
DNW-A100P/A50P/A45P: A = 40 ± 3 ns
[ns]
A
0
4 8
DNW-A100/A50/A45
(47) Enter A33 : DM VR 2 of the maintenance mode.
(48) Connect the oscilloscope's CH-2 to TP3/DM-89(E-1). GND: E702/DM-89(D-1)
(49) OXIDE Y, Main adjustment
(i) Adjust the level difference at 8 MHz use 2 MHz as the reference.
Adjustment point: A33 : DM VR 2 : MAIN OXIDE-Y-A
Specification:
[dB]
B
0
2 8
DNW-A100/A50/A45
(ii) Set the data value of A33 : DM VR 2 : MAIN OXIDE-Y-B to the identical data value as MAIN
OXIDE-Y-A.
(50) To exit A33 : DM VR 2, press the MENU button once.
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
A = 40 ± 5 ns
[MHz]
DNW-A100/A50/A45:
DNW-A100P/A50P/A45P: B = +2.5 ± 0.5 dB
A(*)MAG: 1 dB
[MHz]
[ns]
A
0
4
DNW-A100P/A50P/A45P
B = +2.0 ± 0.5 dB
[dB]
B
0
2
DNW-A100P/A50P/A45P
6-4. DM-89 Board Replacement
8 [MHz]
A(*)MAG: 1 dB
8 [MHz]
6-43