Sony BVU-950 - Page 68

10-6-2. Bimorph Operating Position Adjustment
machine conditions
for
adjustment
spec.
adjustment
Step
1.
TP402/DT-21(H-4)
@
RV306/DT-21(G-4)
¢$201/DT-21
(B-1)
:
No.
1,2,3,4
ON
‘©
Play
back
the
alignment
tape
DC
level=0+0.1Vde
RR2-1SD.
«After
the
Step
1,
press
the
$202
on
the
OT-21
board
(C-1).
Check
that
the
0102
(Hysteresis
Cancel
mode
lamp)
on
the
DT-21
board
lights.
Adjust
the
OC
level
after
the
lamp
lights
off
in
several
sec-
onds.
Step
2.
CH-1:
TP402/DT-21(H-4)
@
RV306/DT-21(G-4)
«Maximize the RF signal level
with RV306 on the DOT-21 board
(G-4).
° Measure the DC voltage at
TP402.
Adjust the OC voltage at TP402
so that the level becomes haif.
¢
After
the
adjustment
is
compiet-
ed,
press
the
S202
on
the
DT-21
board
(C-1).
Check
that
the
0102
(Hysteresis
Cancei
mode
lamp)
on,
the
DOT-21
board
lights.
CH-2: TP18/DM-54B8(S-6)
TP18
DC level of maximum RF (TP402)=A vee end
RF
level
of
TP18
at
the
time=B
Vdc
memorize
DC level (TP402)=4 Vde
TRIG: TP4/DM-54B8(R-5)
Step 3.
TP18/DM-54B(S-6)
Check: B£5%
elf it is out of the specification of Step 3, pertorm Step 2 and 3 again.
But when measuring the DC level, the standard is not Step 1 but Step 2.