Sony DNW-A100 Maintenance Manual page 93

1. Check the Initial Data
1. To enter the maintenance mode, press S1101(G-1) on
the SS-63 board.
2. Enter A35 : DM VR 4, then check that the data of the
following items in A35 : DM VR 4 are the specified
data value. (If not, set them to the specified data.)
(This is OMC DC offset setting data check.)
Item (A35 : DM VR 4) Initial data
OMC DC METAL-Y E4
OMC DC METAL-C D0
OMC DC OXIDE-Y D0
OMC DC OXIDE-C D0
3. To exit A35 : DM VR 4, press the MENU button once.
4. Enter A34 : DM VR 3, then check that the data of the
all items in A34 : DM VR 3 are the specified data
value. (If not, set them to the specified data.)
Initial data
Item (A34 : DM VR 3) for NTSC
SUB METAL-Y-A AF
SUB METAL-Y-B AF
SUB METAL-C-A 70
SUB METAL-C-B 70
SUB OXIDE-Y-A B2
SUB OXIDE-Y-B B2
SUB OXIDE-C-A A7
SUB OXIDE-C-B A7
5. To exit A34 : DM VR 3, press the MENU button once.
6. Enter A33 : DM VR 2, then check that the data of the
all items in A33 : DM VR 2 are the specified data
value. (If not, set them to the specified data.)
Initial data
Item (A33 : DM VR 2) for NTSC
MAIN METAL-Y-A CD
MAIN METAL-Y-B CD
MAIN METAL-C-A 8E
MAIN METAL-C-B 8E
MAIN OXIDE-Y-A A6
MAIN OXIDE-Y-B A6
MAIN OXIDE-C-A 9E
MAIN OXIDE-C-B 9E
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
2. METAL Y Adjustment
1. Short-circuit TP4/DM-89(E-1) and E702/DM-89(D-1)
2. Connect the network analyzer's output to TP103/DM-
3. Insert the following alignment tape in order to set
Group delay adjustment / METAL Y
4. Connect the oscilloscope's CH-2 input to TP104/DM-
5. Adjust the group delay time in 2 MHz through 12
Initial data
for PAL
B2
B2
91
91
BB
BB
A8
6. For NTSC model only:
A8
Initial data
for PAL
B7
B7
8D
8D
A8
A8
9E
9E
3-8. Analog Betacam PB System Alignment
with a shorting clip.
89(E-6). GND: E103/DM-89(F-6)
STANDBY OFF mode.
NTSC model: CR5-1B, PAL model: CR5-1B PS
89 (F-5). GND: E104/DM-89(G-5)
MHz.
1RV101/DM-89(E-5) and
Adj. points:
1RV102/DM-89(E-5)
Specification: 0 ± 20 ns
[ns]
+20
0
_20
2
Adjust the delay time at 6 MHz using 2 MHz as the
reference.
1RV101/DM-89(E-5)
Adj. point:
Specification: A = _10 ± 3 ns
[ns]
0
A
2 6
3-8-5. Cosine Equalizer Adjustment
12 [MHz]
[MHz]
3-57