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