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IC301 SYSTEM
CONTROL,
TIMER,
&TUNING
CONTROL
MPUPl
NFUNCTIONS
TABLE
1%
2
3
DRUM UP
o
4
SS+OFIUM
SHIFT
O
8- -
MC:IN7
-0
9
'-
Posswo
"t
..-
!0
FL- START
-1
+ SAFEIYSW
s
1"; -
CLK–t
=
—
G-
CLK2
;5
Vss
--
16
CF 1
17
CF2
-
m
18
Voo
—.. —
..—
--—
19
POSSWI+2
I
R
20
T. REEL P.
21
T. TOPS,
1"
22
S.13EELP.
I
23
T. ENDS.
——.
54
E-NV.
'-l-'
F+
26
SHORT TEST
1-
i7
w ASP IN
2B
POWER OOWN
I
29
TAPE SPEEO
I
B
30
–
AFT-C
3t
C- FGP.
';
32
POWER LEO
O
33
CTL P.
-i
34
d—--!?!--- . ..1.'?
42
G5
1.
0
4;
G4
;
la
44
G3
o
X
G2
o
46
G1
o
47
VDO
48
V LOAD
o
iiL
Signal Function
Sync.signal
i nput W exisbng channel discr,minabcm
and Nsvslem
d!scnmmalion.
.
.
H
Head drum motor rotaliin soeed up sional,
S19nal for indicating SLOWLSTILL modes and
allw
naliinof drum motor contf oldala.(3valuevol@ge)
n
Cut off for cfipstan motor control voltage in
SLOW
/
STILL
modes.
H
Gain down control for Head Motor al SLOW mode,
— —.————
. . ..- .. ———
—— .-..
. . .
CTL PUISOduty delocllcmsign6f Input. Usml lot VISS
detectbn.
— -.——-.-——
H
Brake signal for cnpslan motof.
Okli–~dicaling"oporalbn poidion Oirnotha, mwn:---
(OV ; SEARCH, STILL,SLOW,STOP,PL4Y,
:wd REC
._
_~0d6S) (5V:EJECT,REW,
andlNlTlALmodos)
—.—
——.
—.-—
L
Switch input indicating start o{ c66seffe bad mg or
discha!ge by cassolle mechanism and dotedmg
accidental erasure pmv.mdionlab of cassello tape.
..——
.—.
L
Inilhl rewf terminal for Ihm IC,
Cbck OSCduring power failures.
—
—...
Frequency is 32kHz.
Ground terminal
IC cbck OSC Ierminal.
,,
L
Frequency is 2.,5MHz.
IC pewtersuppty Iermhal, (5Vdc)
Oata indicating operalmn posilbn of mechanism.
(2V EJECT,REW and INITIAL modes)(3.4V. STOP,
PLAY,REC, and F-SEARCH modes) (2,SV. STILL
and SLOW modes) 15V. R-SEARCH mode)
Pufse inpof for deteclion of lake-up reel 16Morotattin
L
Sensor signal iopul for lap6 b6ginntng d=wlion,
!==="=
Pu!se input for daleclion of supply r661hbks rolelion.
%msorsignali npullortapee nddeleclion.
-
Viiw
head envefope dettibon signal mpul for ATfl
f4Wi audio head envebpe deleclmn SIOMIImpul for
+-
ATR Iunclin. (Ha.Fi modal oniy)
.—
R
REC mode indiiabcm sbnal irmul.
,
NOT USE
L
Power failure delectmn terminal.
——
Input 01 resuil of tape speed discriminalmnby d@d
1---
servo Ic.
Tuner AFT S-cuwe .wgnalinput for tuner AFT co;lrol
—
FG signal input of capstan motor.
TT=====----
C~L head recording/playback pulse signal input""-"
-="=
RF swilching pufw Input, created by head drum PG.
I
i
.,
O@ay grm OUIPUIS(FLDI.
e
IC poweI supply fnput.(5Vdc)
-23V input 107FLD drwe.
3
Oisfday segment OUIPUIS(FLO)
(Includes key.scan output)
No.
T
Name
1/0 I
53
SEG h
o-
54
SEG
g
o-
57
SEG I
0.
l$:-:"+f
56
SEG e
0:
57
SEG d
o-
—.
58
SEG C
o-
-59
SEG b
o– --
-—
'60
SEG a
0-:
1--"-"--
'-
'61
REW LEO
o- n"
62
f'F LEO
o"
H
63
PLAY LEO
o
H
G4-
"-DMSS-LED
'-
o-
H
k-"~t
67
KEY IN 2
1-
'68
'-ITT
OATA
=
.
-—.
- ——.
"69
POC MOOE 2
'0-
-
-75-
POC-MO"OE 1
'o" :
y—---—
-::
ITT CLK
12C OATA
73
--j–"--
SV S, DATA
Ii
-o :
8'
p!!!:
:
!
-----
Ii +-
"ii~—
P[L C~K–—--
O
:-
.———
.—.———.
—.—
BANO 2
o+.
—-
-.
W,%+--++
~-~+
91
PB H
r
OH
92
INPUT SELV
O
--
-93
REA%IFRONT
o :-
94
STILL+ SLOW+X2S
-o
K
93
POWER UP
O
~
96
i
C14+CLK
o-
—.—
——
97
AV CNT
OH
E31
9s
W ASP ON
-
":
99
ML- O
"o -
I&
ML- S
0–
--
Signal
Function
Oispfay segmenl OUIPMS(FLO).
(Includes key.scan output)
Signal Ior indicating REW mode,
Signal Iof indknting FF modo,
Signal Ior hidkrding PIAY modo,
Signal 'lo;-iid-&liri~ -DMSS-m-~e,
Oporahon koy data lnpuls.
NOT USE
Control Siff;al for lC32i~(VPS/POC decorder)
"ConholsIgid Ior IC321 .(VPS/POC de;i!der)
NOT USE
Tetmmal for communicabon of respecbve data wdh
12C ROM
——.
Output 8.bd X 4 serial data gbmg opefatwn mode
and backing data, etc., 10 d!gilal servo IC.
Chb–ei=bK(=ci;;jWnal
oulput100S0
IC,
The clock pulse for dgital servo IC,
Termmal for communicalwn of respeclwe data wth
0S0
DMSS, HIFi and CH+ IC.
-
NOT USE
The clock pulse for 12C, OSD, HIFi IC.
Signal [or d!sable the bmer audio signal.
Chp emabb (access) signal output to Iuner,
Tuning voffage oufput (PWM signal), ( V-syn model )
Oala signal for tuner.,
Tuning band data ( BAN6~;n;-2~<o~~:;v~m-;d6
ti.
The cbck pulse for Iunor.
hANO 1 and 2 ; (L,L). VHF. LOW (L,H). VHF. HIGH-
(H,L). UHF (H,H). SKIP.
(for V.wn model)
..-
.. -—....
The clock pulse for OMSS IC.
Signal for indcali"g "olmal tecmdmg mode,
Signal for indiialing NIP "ode.
Signal Ior mdkfding PAL color system mode,
"H"OUIDUIfor disable audnooutoul wonal.
SiQnal for Indiiabml recordin!l mode.
IC
ground terminal,
IC power suppiy input.(5~dc)
Signal {or indca~mg playback mode.
-—
—
Signal for selecling wdeo input sou,ce.
Signal for Selecling AV-input(vtdeo/audw) sourco,
H= FRONT
STILL, SLOW, or X2speed modes mdtcabon.
W output except when power IS o(I. Ind#calingthat
power ISON.
The clock pulse=~i+~o;~eTi;;C.
Signal for control lh~ N Ihal ISconnoited"to-ttis
VCR.
NOT USE
.-
Loading molor rolalion dhectbn (VO
/ REV)
tndcahon signal,
Loading molor rolalion speed (IOW/ medium / h~h)
indkauon stonal.
4
PK4W_TTS_A
I
17
I
18
I
19
I
20
I
21
I
22
[
23
I
24
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