Sony DNW-A100 Maintenance Manual page 49

METAL Y adjustment
5. Connect and set the oscilloscope as follows:
Band width limit: ON
CH-1: TP100/DM-89(F-7), GND: E101/DM-89(F-7)
AC 100 mV/DIV
CH-2: TP4/DM-89(E-1), GND: E702/DM-89(D-1)
DC 1 V/DIV
TIME: 2 ms/DIV
TRIG: CH-2
6. To perform the tape operation, press the SET button
once on the lower control panel.
7. Play back the flat field signal portion (24:00 to 26:00)
of the following alignment tape in PLAY mode.
For DNW-A100/A50/A45:
For DNW-A100P/A50P/A45P: CR5-1B PS
8. To operate the maintenance mode, press the MENU
button on the lower control panel.
9. Set the oscilloscope's trigger to the _ slope, then
adjust the level of METAL Y-A (ch-A of METAL Y).
Adj. point: A30 : EQ VR : RF GAIN METAL-Y-A
Specification: A = 380 ± 20 mV p-p
10. Set the oscilloscope's trigger to the + slope, then
adjust the level of METAL Y-B (ch-B of METAL Y).
Adj. point: A30 : EQ VR : RF GAIN METAL-Y-B
Specification: A = 380 ± 20 mV p-p
11. While switching the polarity (_/+) of the oscillo-
scope's trigger slope, fine adjust the level difference
between the METAL Y-A and METAL Y-B until they
are identical amplitude.
12. To perform the tape operation, press the SET button
once.
13. Stop the playback of the alignment tape.
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
CR5-1B
Center of V period
A
3-5-3. Betacam / Betacam SP Format PB System (EQ RF Output Level) Adjustment
METAL C adjustment
14. Change the connection of the oscilloscope as follows:
(Keep the setting of the oscilloscope.)
CH-1: TP300/DM-89(B-7), GND: E301/DM-89(B-7)
CH-2: TP5/DM-89(D-1), GND: E702/DM-89(D-1)
15. Play back the flat field signal portion (24:00 to 26:00)
of the alignment tape CR5-1B / CR5-1B PS in PLAY
mode.
16. To operate the maintenance mode, press the MENU
button once.
17. Set the oscilloscope's trigger to the _ slope, then
adjust the level of METAL C-A (ch-A of METAL C).
Adj. point: A30 : EQ VR : RF GAIN METAL-C-A
Specification: B = 380 ± 20 mV p-p
18. Set the oscilloscope's trigger to the + slope, then
adjust the level of METAL C-B (ch-B of METAL C).
Adj. point: A30 : EQ VR : RF GAIN METAL-C-B
Specification: B = 380 ± 20 mV p-p
19. While switching the polarity (_/+) of the oscillo-
scope's trigger slope, fine adjust the level difference
between the METAL C-A and METAL C-B until they
are identical amplitude.
20. To perform the tape operation, press the SET button
once.
21. Stop the playback of the alignment tape, then eject it.
3-5. RF System Alignment (EQ-56 Board)
Center of V period
B
3-13