Kenwood DM-3090, Руководство по обслуживанию

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1* P96/ANEX1 Output Not used
2* P95/ANEX0 Output Not used
3 P94/DA1 Output LDVAR (laser power adjustment output)
4* P93/DA0 Output ADJS (for automatic adjustment step check)
5* P92/TB2
IN
Output Not used
6 P91/TB1
IN
Input LD SW CK input (interruption input only in single state)
7 P90/TB0
IN
Input ERR input (monitor PLL UNLOCK)
8 BYTE Input GND
9 CNVss Input GND
10* P87/X
CIN
Output ST-ID Output
11* P86/X
OUT
Output MD search output
12 RESET Input RESETInput
13* X
OUT
— Extal clock output
14 Vss — GND
15 X
IN
Input EXTAL (8.4672 MHz)
16 Vcc — + 3.15V
17 P85/NMI Input CB
18 P84/INT2 Input DINT (interruption input from MD LSI)
19 P83/INT1 Input DSENSE (servo sense input from MD LSI)
20 P82/INT0 Input ST-ID Input (MD-ON)
21 P81/TA4
IN
Input CD search input (syncro REC suspension input from MD LSI)
22 P80/TA4
OUT
Output MD RSW Output
23* P77/TA3
IN
Input FSW1 (SW power frequency selection)
24 P76/TA3
OUT
Output Vari-pitch correspondence given (H)/not given (L)
25 P75/TA2
IN
Input P-DOWN (power failure detection)
26 P74/TA2
OUT
Output HDON (magnetic head current ON/OFF output)
27 P73/TA1
IN
Output LD+ (loading motor + control output)
28 P72/TA1
OUT
Output LD- (loading motor + control output)
29 P71/TA0
IN
Input CIN (track count signal input)
30 P70/TA0
OUT
Input INN SW (inner SW detection input)
31 P67/TXD1 Output R-DATA
32 P66/RXD1 Output R-LATCH
33 P65/CLK1 Output R-CLK
34 P64/CTS1/RTS1/ Output DSTB (system controller communication enable and communication beingexecuted)
CTS0/CLKS1
35 P63/TXD0 Output MD DATA (MD Data Output)
36 P62/RXD0 Input K DATA (system controller data input)
37 P61/CLK0 Input DSCK (system controller communication clock input)
38 P60/CTS0/RTS0 Input 4M/16M DRAM selection input
39 P57/RDY/CLK
OUT
Output R/P output (REC/PLAY selection)
40 P56/ALE Input FOK (focus servo status monitor input)
41* WFMI Input/Output Not used
42 AVCC Output S2 Ouput
43 AGND Output S1 Output
44 EFMAGC Output SYRS (MD-LSI register selection signal output)
45 EFMAGI Output SYRD (MD-LSI read signal output)
46 ATTR Output SYWR (MD-LSI right signal output)
47 GOUT In/Output SYS D7 (data bus 7)
48 POUT In/Output SYS D6 (data bus 6)
49 PLCK In/Output SYS D5 (data bus 5)
50 EFM0 In/Output SYS D4 (data bus 4)
51 X700KO In/Output SYS D3 (data bus 3)
IC1401 RX-iX0227AWZZ:MD System Microcomputer (IX0227AW)
Pin No. Terminal Name
Function
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
Input/Output
DM-3090
12
CIRCUIT DESCRIPTION
DM-3090(K) COVER 97.11.29 0:19 AM y [ W 19