Kenwood 1050MD Service Manual page 6

1050MD/DM-5090/DM-9090
No. Name
43 RESET
44 REM
45 XINT
46 CE
47 SQSY
48 DQSY
49 DDQSY
50 MNT1
51 Vdd
52 +5V
53~56 KR0~KR3
57 TMSW
58 INISW1
59 BACK
60 ENCB
61 GND
62 BACK ON
63 ENCA
64 +5V
65 SRDT
66 SWDT
67 SCLK
68 CRXD
69 CTXD
70 CENA
71 EXDT
72 FLDCE
73 DRDT
74 DWDT
75 DCLK
76 DLAT
77 DEMPH
78 DSUB1
79 DSUB2
80 SRCLAT
81 BACKCHK
82 VCLK
83 VLDT
84~91 AD0~AD7
92~99 A8~A15
100 Vss
6
CIRCUIT DESCRIPTION
I/O
I Microprocessor hard reset
I Remocon signal input terminal
I Input port of interrupted status from CXD2652AR (IC2)
I Microprocessor chip enable
I Input port of sub code Q from CXD2652AR (IC2)
I U-bit of digital IN / SUB Q sync input of CD format from CXD2652AR (IC2)
I U-bit of digital IN / SUB Q sync input from LC8904Q (IC23)
I Input port of track jump detection from CXD2652AR (IC2)
- Microprocessor power supply
- A/D reference voltage (+5)
I Key return (KR0~KR3)
I Timer switch input
I Detection selector
I Back up voltage detection
I Rotary encoder B
- GND
O Back up change control
I Rotary encoder A
- D/A reference voltage (+5V)
I Data for reading input from CXD2652AR (IC2)
O Data for writing to CXD2652AR (IC2)
O Serial clock to CXD2652AR (IC2)
I Communication to sub u-COM (IC28)
O Communication to sub u-COM (IC28)
I Communication to sub u-COM (IC28)
O Data output to TC74HC4094 (IC32)
O Chip enable to FL driver
I Read data from LC8904Q (IC23)
O Data to LC8904Q (IC23) and LC75710NE (IC1)
O Clock to LC8904Q (IC23) and LC75710NE (IC1)
O Latch to LC8904q (IC23)
I Emphasis from LC8904Q (IC23)
I Sub 1 from LC8904Q (IC23)
I Sub 2 from LC8904Q (IC23)
O Latch to SM5844AF (IC25)
O Back up voltage check
O Clock to SM5844AF (IC25)
O Data to SM5844AF (IC25)
O SRAM address / data (AD0~AD7)
O SRAM address (A8~A15)
- GND
Description
H; Enable / L; disable
H; Comm enable