Kenwood RXD-790 Service Manual page 9

6-2 Pin description
Pin No. I/O
1 I BP-IN
2 I CW
3 I CCW
4 I A-PH
5 I B-PH
6 I HEAD PHONE
7 O DOLBY ST
8 I/O SEL ST
9 O IC-DATA
10 O IC-CLK
11 O E ST
12 O SANYO CE
13 I PLL DO
14 O DAC ST
15 O C BUSY
16 O VCD CLOCK
17 O C DATA
18 I M DATA
19 O CD-CLK
20 O SQCK
21 O CD-DATA
22 I SUBQ
23 O CD-XLAT
24 I SENSE
25 O PS-LOAD
26 I PS-SIN
27 O E. VOL ATT
28 O IC-CLR
29 I CE
30 I SCOR
31 O A MUTE
32 I REM
33 I PROTECT
34 I M BUSY
35 I RESET
36 I Xcin
37 O Xcout
38 I Xin
39 O Xout
40 Vss
41~44 I KR0~KR3
45~54 O 1G~10G
55~73 O SEG41~SEG23
74~76 O SEG22/BP OUT3~SEG20/BP OUT1
77~81 O SEG19~SEG15
82 ~90 O SEG14 / KEY15/~SEG6/KEY7
91 Vcc
92 ~ 97 O SEG5/KEY6/~SEG0/KEY1
98 Vee
99 AVss
100 Vref
CIRCUIT DESCRIPTION
Name
Speana input (A/D convertor input)
Rotary encoder input B
Rotary encoder input A
A photo sensor input
B photo sensor input
Head phone sw input
Surround IC(LV1016/LA2786) strobe
Selector IC(NJU7313) strobe
Selector/PLL/E. Volume/Expander IC (data)
Selector/PLL/E. Volume/Expander IC (Clock)
Expander IC (NJU3711/NJU3713/NJU3714) strobe
System IC(LC75393(/PLL(LC72131)/E. vol(LC7536) CE
PLL data input
DAC(PCM1717E) strobe
VCD busy output
VCD clock
VCD data output
VCD data input
CD DSP clock (CXD2509Q)
Sub cord clock(CXA 1782BQ, CXD2509Q)
CD IC DATA
Sub code data
CD latch output (CXA1782BQ, CXD2509Q)
CD sense input (CXA1782BQ, CXD2509Q)
Parallel serial IC load
Parallel serial IC data
E. Vol attenuation
Expander IC reset
Power failure input
Sub code synchronism signal (CXD2509Q)
Mute control
Remote control input
Protection input
VCD board u-COM busy input
Reset
Timer clock input/output(32.768kHz)
Main clock input/output(8.38MHz)
(GND)
Key return 0~3
FL grid 1G~10G
FL segment SEG41~SEG23
FL segment SEG22~SEG20/band pass control 3~1
FL segment SEG19~SEG15
FL segment SEG14~SEG6/Key scan KEY15~KEY7
u-com power supply
FL segment SEG5~SEG0/Key scan KEY6~KEY1
Pull down power supply
A/D GND
A/D reference voltage
RXD-790/V860/V890
Description
H : ON L : OFF
H : Shift L : Load
H : ON L : OFF
H : Normal L : Reset
H : AC ON L : AC OFF
H : OFF L : ON
H : Protect L : Normal
H : Normal L : Reset
H : ON
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