Sony BVH-2000, Operation And Maintenance Manual

Page: 337 / 505

(5-7-6. R L-12 Board)
a-Bit
for
Anaroc
Detection
Several analog signals are input into the RL board, and input
into the
ND
converter ICl7 for processing by the CPU.
As with the D/ A converter, this
ND
converter is used in
common by the various system.
ND
converter IC17 converts the analog signals equivalent to 16
channels (an additional 8 channels are provided on the CD
board) into digital signals in accordance with the select address
data given by the WRITE ADDRESS
50lCH/Bit-3,-2,-1,-O. The
digitally converted 8 bits data are read into the CPU by the
READ ADDRESS 50I8H.
IC19,21,22
IC 25- 1 S-REEL TENSION
PLAY S- REEL TENSION
Which system is to be converted by the
ND
converter is
determined by the output of the output port IC2Q. The output of
IC2Q is again read into the CPU via the input port IC2P.
CNR
t'03{
188
198
~RVI4 ~
SKEW
168
TRACKING CONTROL
20A
DRUM MOA
Z
208
CAPSTAN MOA 12
0
27A
ANA IN SPR-1
13
r-
278
ANA IN SPR-2
14 «
25A
ANA IN SPR-3 15
a:
ANA 8US
16
W
CO,26A 26A
c,
0
LL
0
>-
CIl
a:
::J
1Il
0
~
WR4
W
I
(SOlCH)
r-
t.D
NC 218
SPARE IN
IC2Q:
WR ADDR
50le
H
SELECTION OF
BIT-3 B) T- 2 B IT-
t
RIT-O
AID INPUT DATA
0 0 0 0 _~-=-~EEL~ENSION _____ ~
----
0 0
0 1
PLAY S-REEL TENSION
"B"
-'-- --------~
_._----- -----_.
..
__
._-----
---_.---_._-----
0 0 1 0
T-REEL TENSION
"B"
~-
----.--- ----
--------~-
---------------
0 0 1 1
+12V
POWER MONITOR
reU"
-----
----- ----------
0
1
0 0
S-REEL POWER
reU"
f------ >------
--_.--
--- ----------
0
1 0
1
T-REEL POWER
"U"
0
1 1 0
T-REEL MOA
"B"
0 1 1
1
S-REEL MDA
"B"
1 0 0 0
SKEW CONTROL
"u"
- --- -------- ---------.
----------------------
1 0 0
1
TRACKING CONTROL
"U"
----------
1 0 1 0
DRUM MDA
"B"
1 0 1 1
CAPSTAN MDA
"B"
~------------
1 1 0 0
SPARE-·!(Not
used)
"B"
-----
_._____ .____ w_. _______
1 1 0 1
SPARE-2(Not
used)
"B"
---
1-------
--.------
1---------
----------------
1 1 1 0
SPARE-3 (Not
used)
teB"
------ ---- ---------.------
1
1
1
1
ANA BUS (CD-17 MPX) "U/B"
ICi7,2M,2N
OFFSET
CIl
::J
1Il
DO 8
I
07
07
AID
010
F,t=======;.>l
CONY.
STATUS
IC2N,2P
AID CONY.
MONITOR
«
~
«
o
RO 1
lS019H)
IC21
IC22
1
In accordance with the signals of the 16 channels for which
conversion is provided by the
ND
converter, the UNIPOLAR!
BIPOLAR select signal is output from IC2Q-12 (Bit-4).
Signals with "B" in the table above denote BIPOLAR signals
and -3 to +3V data are converted Signals with "U" are
UNIPOLAR signals and 0 to +3V data are converted
SERVO SYSTEM
5-7-14
BVH-2000( U/C)/PS/PM
BVH-2180(U/C)/PS/PM