Kenwood KRF-V7020D Service Manual page 9

4-2 Pin description
Pin No. Pin Name
1,2 G10,11
3 None
4,5 None
6 AUDIO
7 VOL.ENC.A
8 REMOCON
9 VOL.ENC.B
10,11 None
12-14 KR0-2
15 PROTECT
16 S.DATA
17 S.BUSY
18 SP.A+B
19 SW.6dB.ATT
20 SEL.ENC.A
21 SEL.ENC.B
22 MULTI.ENC.A
23 MULTI.ENC.B
24 SL16/XS8
25 DSP.SCK
26 DSP.SI
27 DSP.SO
28 Vdd
29 None
30 CH.SPACE
31 DSP.CS
32 CODEC.CS
33 PLL.DO
34 PLL.ST
35 PLL.SD
36 RCV.CE
37 Avss
38 RESET
39,40 8MHz
41 Vss
42 None
43 TEX
44 Vdd
45 Vfdp
46 SEL.ST1
47 PLL.DT
48 PLL.CK
49 PLL.CE
50 T.TUNE
51 A.MUTE
52 SEL.ST2
53 20dB.ATT
54 VOL.DT
55 VOL.CK
56 VOL.ST
57 DSP.SCB
58 VCR.A
59 VCR.B
60 FA.RLY
CIRCUIT DESCRIPTION
I/O
O Display grids 10,11
- Ic test mode port.
I No connect
I Audio signal detection port. L=AUDIO.
I Volume encoder A(clockwise) input.
I Remote contol signal input.
I Volume encoder B(counterclockwise) input.
O Ic test mode port.
I Key return 0-2.
I Protection signal detection port. H=PROTECT.
I/O Serial DATA signal.
I/O Serial BUSY signal.
O Speaker on both A sp. and B sp.
O Sub woofer 6dB attenuation
I Selector encoder A(clockwise) input.
I Selector encoder B(counterclockwise) input.
I Multi encoder A(clockwise) input.
I Multi encoder B(counterclockwise) input.
I SL16/XS8 selector. H=16bit.
O DSP(YSS902/912) CLOCK output.
I DSP(YSS902/912) DATA input.
O DSP(YSS902/912) DATA output.
- Analog power supply(+5V)
I No connect
O Channel space chengeover H=E1 type
O DSP(YSS902/912) CS output.
O CS4226 CS output.
I Pll ic DO signal input .
I Tuner STEREO signal detection port. L=STEREO.
I Tuner SD signal detection port. L=TUNED.
I Receiver CHIP ENABLE signal port. L=ENABLE.
- Analog GND.
I Microproessor RESET signal.
I Main clock generation(8MHz).
- Microprocessor GND.
I No connect
- GND.
- Power supply(+5V).
- Power supply(-33V).
O TC9162AF/63AF/64AF ST1 output. H=LATCH.
O Pll ic DATA signal output .
O Pll ic CLOCK signal output .
O Pll ic CE signal output .
O Tuner mute control. L=MUTE ON
O Audio mute control. L=MUTE ON
O TC9163/9164 ST2 output
O Volume 20dB attenuation control. H=ATT. OFF
O Volume ic (M62446SP) DATA control.
O Volume ic (M62447SP) CLOCK control. H=ACTIVE
O Volume ic (M62448SP) ST control. H=ACTIVE
O DSP(YSS902/912) chip selector
O Video ic (NJM2279M) cont1 control. H/L=STATIC
O Video ic (NJM2279M) cont3 control. H/L=STATIC
O Front A speaker relay control. H=RELAY ON
KRF-V7020D/V8020D/VR-307/309/357
Description
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