Akai MX-550 Service Manual page 91

uPD75108CW (AX-550/650 SYSTEM CONTROL MI-COM)
[Pin No. | PORT NAME | 1/0 | DESCRIPTION
tava] 0 | apt aie Fad poston
Ginga detect pack
3 aa ev 0 input init reverse recoraing
4 Ts 120p/7op-h | SO Inputdetect 120ys/7ops tape L:120us
r 5 | AR-FWO-ll | ~— OO _[_Input inhibit forward recording
Ps]
taYE
| |
_Input detect head position
pene OS opdemtpe
r 8 S| «t20p/7opl ~——sCsC*dTC SCO S| Inputdetect 120us/70ps tape L:120us
PoC] «REEL C*C"'CYLSOCON'CC Reel pulse input
[i0,-C«d;:CREELAYS—C—C"'CSC*L'COCONCOC Reelpulseinput
ee a a
| 12 &4| x2PB7ops | O | x2 speed playback EQ switching output
[13 ~—~*| PBMUTE —s—s|_~—O_—(|_Playback mute control output
a ross 005 EDIT control output
[15 ~*| DATAIN ——s| sit ~—«|:'Busserialdatainput
[16 | DATAOUT _—s | =O _—*|_-Busserialdataoutput
SS SA 4, GE eR
[18 | BOP. ————s||_~—st_|_ Music interval detection signal input H:Music interval
[19S] ~PBTAPE! ~=~——s|_ ~—O_—d|_-TAPE | playback switching control output
ee oe et papa
21 [HEAD REC/PB_—|_~—«O__—|_:-HEAD recording/playback control output Hiplayback |
| 22. ~*| MECHAPOWER | O | Capstanmotorstopinput
P23.~SC«| MOTOR xi/x21_ [| © | Capstan motor x 1/x 2 speed switching output L: x 1H: x 2|
P24 ~~S«| ~PL.COMMON _—s|_—=O__—i|-'~Plunger ON/OFF control output =
a es [© | Plunger ON/OFF control output
[ x2PBPEAK —«|| =O __—'|_-For_x 1/ x 2 speed playback peaking frequency switching |
7 | MOTOR xt/x2i_ | © | Capstan motor x 1/x 2 speed switching output L: x 1H: x 2 |
[PL SSSCSSC*dT~SCC*|:«~Plunger ON/OFF control output
TAPE li ® LAMP control output
TAPE | » LAMP control output
+5V power supply
[45V power supply CC"
x 1 DUBBING LAMP controi output
TAPE | @ LAMP control output
REC PAUSE LAMP contro! output
TAPE Il < LAMP contro! output
[TAPE | operation input "ON —SSSSSCS~S~—S
FWD LAMP-II
FWD LAMP:!
vec
vDD
x 1 DUBBING LAMP
REV LAMP:1
EC PAUSE LAMP
x 2 DUBBING LAMP
EV_LAMP-!!
2D
no x b< |] ajefala
fe (I-|9/ BIS (=| E13IE 5 3
ba] = mim
o cle
B\b
3/5
AIN VR LAMP
APE Il
APE |
>
ao!
ESET Reset signal input
Main clock output
[| Main clock input
- N
aor per =
Command rewind tape play L:ON
>
ae ee Command! reverse tape play LON
f= 80, S| | 1 | Command stop machanism movement L:ON
FWD [|| Command forward tape play LON
| 52.—| FFOUFFCSC™C~*"'(#CW S&L; CSCL _{ Commandtastforwardtape play L:ON
[53 ~—Ss«| ~REGPAUSE —s—si|_—st_ | REC PAUSE commandinputL:ON
[54 | AUTOMUTE ~—s |_| | AUTOMUTEcommandinputL:ON
Y55—s~Ci«|:s SPOWERSW | ts Power switch ON/OFF command input
| 56 S| ~PACKMUTE ~—s | =O | ~PACK MUTEccontrolputput
P57 —Ss«|:«éDLBY REC/PB | —O[_DOLBY recording/playback control output
p58 | REC MUTE | O | RECMUTEcontrol outputL:MUTEON
[| 59 ~—«(| x2RECPEAKING | O | For x1/x2 speed recording peaking frequency switching |
P60 ~~—~«| *RECCrOe2 | | CrO2tape recording EQswitching outputH:CrOztape
PetC~"'Y WADUESCC~C"'CC*WLSCOCON COC FADE EDITcontroloutput =
[| ez sc | © | BiasOSCcontroloutputH:OSCON
| es | xirecreakns =| 0 fe au X 2 speed recording peaking frequency switching
[64 ___—i|_ vss ae SS ICGND es 6 ae ee
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