General Information - Pioneer MJ-L7 Service Manual

MJ-L7
7. GENERAL INFORMATION
7.1 1C
@ 1245730331 (IX2645AF): (IC1401: MD MAIN PCB ASSY)
@ MD System Micro-computer
@ Pin Function
@ The information shown in the list is basic information and may
not correspond exactly to that shown in the schematic diagrams.
Port Name
Function
Port Name
Function
P96/ANEX1 NC
P95/ANEXO NC
P72/TA10OUT LD-
(LOADING MOTOR - CONTROL OUTPUT)
P94/DA1 LDVAR (LASER POWER ADJUST OUTPUT)
P71/TAOIN CIN (TRACK COUNT SIGNAL INPUT)
P93/DA0 ADJS (AUTO ADJUST STEP CHECk)
P70/TAOOUT INN SW (INNER SW DETECT INPUT)
P92/TB2IN
NC
P67/TXD1
P91/TB1IN LDSWCK INPUT (INTERRUPT WHEN
USING THE MJ-F21 ALONE)
P66/RXD1
P65/CLK1
P90/TBOIN
ERR INPUT
BYTE BYTE
CNVSS CNVSS
P64/CT1/RTS1/
CTSO/CLKS
DSTB (SYSTEM CONTROL
COMMUNICATIONS ENABLED AND
COMMUNICATIONS BEING MADE)
P87/XCIN NC
P63/TXDO MD DATA (MD DATA OUTPUT)
P86/XCOUT NC
P62/RXDO K DATA (SYSTEM CONTROL DATA INPUT)
RESET RESET INPUT
P61/CLKO DSCK (SYSTEM CONTROL
COMMUNICATION INPUT)
XOUT NC
P60/CTSO/RTSO
VSS GND
P57
R/P (REC/PLAY SWITCH)
XIN XTAL (8.4672MHz INPUT)
VCC
+3.15V
P56 FOK (FOCUS SERVO OPERATION
MONITOR INPUT)
P85/NMI
P55
HF ON (HIGH FREQUENCY
SUPERIMPOSE ON/OFF OUTPUT)
P84/INT2
DINT (INTERRUPT INPUT FROM MD
REC/PLAY LSI)
P54 SEL1
P83/INT4
DSENSE (MD REC/PLAY LSI SERVO
SENS INPUT)
P53
SELO
P82/INTO ST-ID/MD-ON
P52 SYRS (MD REC/PLAY LSI REGISTER
SELECT SIGNAL OUTPUT)
P81/TA4IN
CD SEARCH INPUT (SYNCHRONOUS
REC STOP INPUT)
P51
SYRD (MD REG/PLAY READ SIGNAL
OUTPUT)
P80/TA40OUT MDRSW OUTPUT
P50
SYWR (MD REC/PLAY WRITE SIGNAL
OUTPUT)
P77/TASIN
FSW1 (SW POWER SUPPLY
FREQUENCY SWITCH)
P47
SYSD7 (ENDEC/ATRTAC DATA BUS 7)
P76/TASOUT FSWe (H/L SWITCH FOR SW
POWER SUPPLY f)
P46 SYSD6 (ENDEC/ATRTAC DATA BUS 6)
P45
SYSD5 (ENDEC/ATRTAC DATA BUS 5)
P75/TA2IN P-DOWN (DETECTION OF POWER
FAILURE)
P44
SYSD4 (ENDEC/ATRTAC DATA BUS 4)
P74/TA2ZOUT
HDON (MAGNETIC HEAD CURRENT
ON/OFF OUTPUT)
P43 SYSD3 (ENDEC/ATRTAC DATA BUS 3)
P42 SYSD2 (ENDEC/ATRTAC DATA BUS 2)
P73/TA1IN
LD+
(LOADING MOTOR + CONTROL OUTPUT)
P44
SYSD1 (ENDEC/ATRTAC DATA BUS 1)
P40 SYSDO (ENDEC/ATRTAC DATA BUS 0)
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