Kenwood V8020D Schematic
AUDIO VIDEO SURROUND RECEIVER
- –
KRF-V7020D/V8020D
VR-307/309/357
SERVICE MANUAL
KENWOOD badge
(B43-0302-04)
Knob
(K27-2293-04)
Knob
(K29-7370-02)
Phone jack
(E11-0127-05)
Font glass
(B10-3458-02)
Knob
(K29-7370-02)
Knob
(K29-7323-03)
Knob
(K29-7326-04)
© 1999-1/B51-5499-00 (K/K) 1895
Knob
(K29-7325-04)
Foot
(J02-1407-03)
Miniature phone jack
(E11-0293-05)
Lock terminal board
(E70-0052-05)
Slide switch
(S62-0034-04)
Phono jack (4Px2)
(E63-0046-15)
Phono jack
(E63-0093-05)
Phono jack
(E63-0094-05)
Phono jack (6Px2)
(E63-0047-15)
Screw terminal board
(E70-0100-05)
Phono jack
(E63-1080-05)
Optical receiving module
(W02-1181-05)
Phono jack
(E63-0164-05)
Power cord bushing
(J42-0083-05)
Slide switch
(S62-0001-04)
AC outlet
(E03-0148-05)
Lock terminal board
(E70-0047-05)
AC power cord
(E30-2605-05)
Metallic cabinet
(A01-3685-01)
Illustration is KRF-V7020D(Y).
Remote Controller
Model Destinations Parts number Model name Battery Cover
KRF-V7020D
X7,C7,Y7,V7,M7 A70-1268-05 RC-R0712 A09-1123-08
KRF-V8020D
X8 A70-1275-05 RC-R0508 A09-0366-08
KRF-V8020D
C8,I8,Y8,M8 A70-1277-05 RC-R0608 A09-0366-08
VR-307
K6,P6 A70-1268-05 RC-R0712 A09-1123-08
VR-309
K8,P8 A70-1277-05 RC-R0608 A09-0366-08
VR-357
K7,P7 A70-1277-05 RC-R0608 A09-0366-08
Resetting the Microcomputer
If the microcomputer may malfunction (unit cannot be operated,
or shows an erroneous display) if the power cord is unplugged
while the power is ON, or due to some other external factor. If this
happens, execute the following procedure to reset the microcomputer and return the unit to its normal operating condition.
Unplug the power cord from the wall outlet, then plug it
back in while holding down the POWER key.
Please note that resetting the microcomputer will clear the contents
of the memory and returns the unit to the state it was in when it left the
factory.
With the power cord plugged in, turn the POWER key
OFF. Then, while holding down the ON/STANDBY key,
press POWER.
For U.S.A. and Canada
For other countries
•
FM
(T90-0836-05)
RC-R0508/R0608 RC-R0712
Battery cover (A09-0366-08) Battery cover (A09-1123-08)
(E03-0115-05)
indoor antenna (1)
(T90-0833-05)
Loop antenna stand (1)
Batteries (R03/AAA) (4)
*AC plug adaptor (1)
*Use to adapt the
plug on the power
cord to the shape
of the wall outlet.
(Accessory only for regions where use
is necessary.)
AM loop antenna (1)
Remote control unit (1)Remote control unit (1)
KRF-V7020D/V8020D/VR-307/309/357
CONTENTS / ACCESSORIES / CAUTIONS
Contents
CONTENTS / ACCESSORIES / CAUTIONS...............2
DISASSEMBLY FOR REPAIR.....................................3
CONTROLS.................................................................4
BLOCK DIAGRAM.......................................................6
CIRCUIT DESCRIPTION.............................................7
ADJUSTMENT.......................................................... 14
Accessories
WIRING DIAGRAM....................................................15
PC BOARD ................................................................16
SCHEMATIC DIAGRAM............................................21
EXPLODED VIEW .....................................................35
PARTS LIST...............................................................36
SPECIFICATIONS.....................................................45
Model name vs remote controller
Cautions
2
KRF-V7020D/V8020D/VR-307/309/357
1
2
2
4
4
4
3
x2
x2
x2
x2
DISASSEMBLY FOR REPAIR
1. Remove the 8 screws (1,2,3),
remove the rear panel.
2. Connect the GND of the rear panel
and the chassis, the GND of the
mounting hardware and the chassis
with 2 alligators clip (4)
3
4
8 FUNCTION SHIFT key
Use in combination with the numeric keys to
execute alternate commands.
9 Numeric keys
Provide functions identical to those of the
original remote control supplied with the
component you are controlling.
To access the functions printed above the
keys, press within 3 seconds of pressing the
FUNCTION SHIFT key. Function availability
varies for each component.
0 SHIFT key
Use in combination with the AUDIO and
VIDEO keys to change the remote control
mode without changing the input selector or
in combination with the POWER key to turn
on and off components programmed into
the remote control.
! TV selector key
Sets the remote control to operate a TV or
cable box. This key does not change the
input selector on the receiver.
@ AUDIO selector key
Selects the audio inputs and sets the remote control to operate the respective
KENWOOD audio component.
If you connect audio components from
KENWOOD and other makers to the MD/
TAPE or CD jacks, you can set the remote
control to operate these components by
registering the appropriate setup code at
the respective input.
# GUIDE key
Use to activate the OSD menu functions of
registered components.
$ VOLUME key
Use to adjust the receiver volume.
% MUTE key
Use to temporarily mute the sound.
^ SOUND key
Use to adjust the sound quality and ambience effects.
& LISTEN MODE key
Use to select the listening mode.
* SETUP key
Use to select the surround sound settings.
1 POWER key
Use to turn the receiver on and off.
Use in combination with the input selector
(AUDIO, VIDEO, or TV) keys and SHIFT key
to turn various components on and off.
2 MACRO key
Use in combination with the AUDIO, VIDEO,
or TV keys to execute a series of commands
automatically (MACRO PLAY).
3 VIDEO selector key
Selects the video inputs and sets the remote
control to operate the component registered at the respective input.
4 Multi control keys
Use to operate the selected component.
5 REC key
Use to operate the selected component.
6 TUNING/SKIP key
Use during the setup procedure to specify
various settings. Use to operate the tuner or
selected component.
7 SUBWOOFER key
Use in combination with the VOLUME +/–
keys to adjust the volume of the subwoofer.
There are some cases in which keys (or
knobs) that have the same function on
the receiver and on the remote control
have different names. In the instructions of this manual, if the names of
corresponding keys (or knobs) on the
receiver and remote control are different, the name of the remote control key
is indicated in parentheses.
Remote control unit (RC-R0608 / R0508)
Display
Speaker selection indicators
Input channel indicators
Output channel indicators
AUTO SOUND indicator
Band indicators
AUTO indicator
MEMO. indicator
ST. indicator
TUNED indicator
3 STEREO indicator
STEREO indicator
1 POWER key
(For U.S.A. and Canada)
Use to turn the power ON/OFF.
STANDBY indicator
1 ON/STANDBY (
) key
(Except for U.S.A. and Canada)
Use to switch the power ON/STANDBY
when the POWER is turned ON.
STANDBY indicator
2 POWER key
(Except for U.S.A. and Canada)
Use to turn the main power ON/OFF.
3 Surround indicators
÷ DTS indicator
Lights when the receiver is in the DTS
mode.
(For VR-309, KRF-V8020D)
÷ DOLBY DIGITAL indicator
Lights when the receiver is in the Dolby
Digital mode.
÷ VIRTUAL SURROUND indicator
Lights when the receiver is in the Virtual
Surround mode.
4 DIMMER key
Use to adjust the brightness of the display.
Use to select the REC MODE.
5 P.CALL keys
Use to call up previously registered radio
stations.
6 BAND key
Use to select the broadcast band.
7 AUTO key
Use to select the auto tuning mode.
8 MEMORY key
Use to store radio stations in the preset
memory.
9 VOLUME CONTROL knob
0 PHONES jack
Use for headphone listening.
! SPEAKERS A/B keys
Use to turn the speakers ON/OFF.
@ BASS BOOST key
Use to select the maximum adjustment
setting for the low frequency range.
About the STANDBY indicator
This unit has a STANDBY indicator. When the STANDBY indicator is lit, the unit consumes a small amount of power to preserve the memory. This is called
STANDBY mode. This mode also lets you turn the power ON using the remote control.
Frequency display,
Input display,
Preset channel display,
Surround mode display
Speaker indicator
CLIP indicator
PRO LOGIC
indicator
DIGITAL indicator
S.DIRECT indicator
MONITOR indicator
DOWNMIX indicator
# MONITOR key
$ SOURCE DIRECT key
% INPUT MODE key
Use to switch between the digital and analog
inputs.
^ LISTEN MODE key
Use to select the listening mode.
& SOUND key
Use to adjust the sound quality and amb
ence effects.
* SETUP key
Use to select the surround sound settings
( MULTI CONTROL knob
Used to make a variety of settings.
) INPUT SELECTOR knob
Use to select the input sources.
For U.S.A.
and Canada
MUTE indicator
For VR-307, VR-357
KRF-V7020D
KRF-V7020D/V8020D/VR-307/309/357
SP
B
A
MUTE
CLIP
2
AV SURROUND RECEIVER
STANDBY
POWER
ON / STANDBY
1
STANDBY
ON / STANDBY
POWER
- ON – OFF
PHONES
LS
L
LFE
SPEAKERS
A
R
C
SW
S
RS
DOLBY DIGITAL
VIRTUAL SURROUND
DTS
DOLBY DIGITAL
VIRTUAL SURROUND
B
BASS BOOST
4 6 75
P.CALL P.CALL
DIMMER
SOURCE
INPUT MODE LISTEN MODE
MONITOR
DIRECT
BAND
MULTI CONTROL INPUT SELECTOR
SOUND
SETUP
AUTO SOUND
FM
PRO LOGIC
AM
MHz
3 STEREO
kHz
DOWNMIX
AUTO
AUTO
DIGITAL
MEMO.
S.DIRECT
MONITOR
ST.
TUNED
83
MEMORY
9
)(%$#@!0 ^ &*
VOLUME CONTROL
DOWN
1
2
3
4
5
6
7
UP
8
9
POWER
SHIFTMACRO
AUDIO
TVVIDEO
8
P. CALL P. CALL
BAND
6
4¢
7
GUIDEREC
VOLUMETUNING/SKIP
MUTE
LISTEN
SOUNDSUBWOOFER
MODE
FUNCTION
SHIFT
THEME FAVMENU
INFO ALT AUDTV/SAT/VID
REPEAT RANDOM+100
DISPLAY
SETUP
231
564
897
ENT+10
0
0
!
@
#
$
%
^
&
*
CONTROLS
Remote control unit (RC-R0712)
AUTO (7)key
If tuner is selected as the input source, this
key functions as the AUTO key.
If CD or MD is selected as the input source,
this key functions as the stop key.
TUNING (1 ¡) keys
If tuner is selected as the input source, these
keys function as tuning keys.
If CD or MD is selected as the input source,
these keys function as search keys.
P.CALL (4 ¢) keys
If tuner is selected as the input source, these
keys function as P.CALL keys.
If CD or MD is selected as the input source,
these keys function as skip keys.
3 LISTEN MODE key
Use to select the listening mode.
4 MUTE key
Use to temporarily mute the sound.
5 SOUND key
Use to adjust the sound quality and ambience effects.
6 MULTI CONTROL key
Used to make a variety of settings.
1 Numeric keys
If CD or MD is selected as the input source,
these keys function as numeric keys. If tuner
is selected as the input source, these keys
are used to call up station presets.
2 Component operation keys
Use these keys to operate other components with system control connections to
the receiver.
2 key
If tape is selected as the input source, this
key functions as the play key for side B of the
cassette (the side facing away from the front
of the deck).
BAND (6) key
If tuner is selected as the input source, this
key functions as the band selector key.
If CD is selected as the input source, this key
functions as the play/pause key.
If MD is selected as the input source, this key
functions as the play key.
DISC SKIP, A/B, +100 key
If CD is selected as the input source, this key
functions as the multi-CD player disc skip key.
If TAPE is selected as the input source, this
(A and B) of a double cassette deck.
7 DVD CONT key
Used to operate DVD player.
While holding this key depressed, press any of
the keys masked in gray inthe above illustration
to operate the corresponding function of a
DVD player from KENWOOD.
Keys 3, 4, 5, 9 and ! are given the
following functions during the DVD player
control operation.
3 :TITLE
4 :ENTER
5 :SUB TITLE
9 :MENU
! :OSD
For details, refer to the instruction manual of
your DVD player.
8 POWER key
Use to switch the power ON/STANDBY when
the POWER is turned ON.
9 SOURCE DIRECT key
0 VOLUME CONTROL key
! SETUP key
Use to select the surround sound settings.
@ MONITOR key
# Input selector keys
Use to select the receiver's input source.
123
1
267
2
3
4
5
1 TUNING ¡4 P.CALL ¢
MULTI CONTROL
LISTEN
MODE
TITLE
SOUND
SUB TITLE
VOL.DOWN
6
MD/TAPE TUNER CD PHONO
7
DVD CONT VIDEO 1 VIDEO 2 VIDEO 3
REMOTE CONTROL UNIT
89
VOL.UP
MUTE
ENTER
RC-R0712
POWER
0456
+107
DISC SKIP
A/B +100AUTOBAND
S.DIRECT
MENU
SET UP
OSD
MONITOR
8
9
0
!
CONTROLS
@
#
KRF-V7020D/V8020D/VR-307/309/357
5
6
LINE BUF
PHONO EQ
X05
IC16
NJM2279M
CS4226
LPFLPF LPF LPF
x2x2 x2 x1
M62446SP
6ch E. VOL
with 2ch
TONE CONT.
x0.5
BUF
STK411-230
STK410-030
+20/0dB
+B HITAP
-B HITAP
+B LOWTAP
-B LOWTAP
CD
COXIAL
OPTICAL
VIDEO2
IN
DIGITAL
VIDEO3
VIDEO2
VIDEO1
CD
PHONO
TAPE
/MD
MONIPLAY
MONI
/MD
TAPE
VIDEO1
VIDEO3
VIDEO2
VIDEO1
VIDEO1
MONITOR
S-VIDEO IN
REC
OUT
Lch
H, P, Rch
H, P, Lch
Rch
Cch
Lch
Rch
LSch
RSch
SWch PRE OUT
SP-B
SP-A
AC IN
+5V
A.V.R
for
u-COM
+15V
A.V.R
A.V.R
-15V
+5V
+7V
-7V
A.V.R
5V
for E. VOL
for
u-COM
for FIL AC
(AUDIO and VISUAL)
TUNER etc.
for AMP (HI TAP)
for AMP (LOW TAP)
for RELAY SW
TC9163
TC9164
A1
J1
IC6(1/3)
IC7(3/3)
IC7(1/3)
IC7(2/3)
IC6
IC8
IC6(2/3)
VIDEO (Y)SEL
(NOT for K,P TYPE)
Q1
SWITCHED
S1
D1,4
D2
D5
IC1
IC2
-30V
IC13
Q2
IC1IC2
IC8
(2/2)
IC8
(1/2)
IC9
IC7
IC5
IC11
Q3
Q4
Q7
Q5
Q6
Q8
Q9
Q10
Q13
Q11
Q12
IC4
IC3
2.0V/2.2KSWch
PRE OUTPUT
CXP82852-139Q
u-COM
INPUT SEL.
TUNER
TC9162
D1-4
(1/2)
(2/2)
(1/2)
(1/2)
(2/2)
(2/2)
IC10
IC10
IC12
IC11
IC11
IC12
SP. OUTPUT
5CH. SP. 28.3V/8
COXIAL
VIDEO3
SUB
S5
S2
DIG
S4
L,R
MIX
IC10
S3
LS,RS
S7
NOSUB
ANA
S1
REC OUT BUF
IC9
S1
S2
S3
S4
S4
S5
S6
S7
S8
S1
S2
S3
IC6(3/3)
ANALOG REC
S7
DIGITAL REC
S8
Q43
Q44
D3
A.V.R
for
for DSP
A.V.R
3.3V
IC14
6dB ATT MUTE
SYNC
AC3 DECODER
SUB DSP
B
A
ABYSS902
YSS902 SDIBSEL=0
SDIBSEL=1
(VISUAL IN/OUT)
S5
S6
DSP
IC1
Lch
Rch
Cch
LSch
RSch
SWch
NJM2279M
IC17
VIDEO (C)SEL
AD/DA etc.
for DSP
-5V
A.V.R
IC19
A.V.R
IC18
5V
IC12
for DIR.
A.V.R
5V
NJM2279M
VIDEO SEL
IC4
MONITOR
VIDEO 1
VIDEO 1
VIDEO 2
VIDEO 3
VIDEO OUT
VIDEO IN
200mV/2.2K
200mV/47K
OUT
IN
2.5mV/27K
(AUDIO IN/OUT)
PHONO
OTHER
KRF-V8020D,VR-209
USED
K1
S-VIDEO OUT
1Vp-p/75
0.286Vp-p/75C
Y
S-VIDEO IN/OUT
(VISUAL IN/OUT)
1Vp-p/75
VIDEO IN/OUT
IC51
LFE
DA
AD
2
2
BYPASS
SW
C
LS,RS
L, R
L, R
L
R
C
LS
RS
SW
DIR
C LS/RS L/R
+
+
+
+
+
+
+
4700uF
4700uF
3300uF
470uF
2200uF
3300uF
2200uF
+
2
LR
LS,RS
C,LFE
L,R
C,SUB
C,SUB
L,R
LS,RS
C
Y
Y
C
Y
C
Y
C
Y
C
KRF-V7020D/V8020D
(X00)
(X08)
(X09)
(X08)
VR-307/309/357
KRF-V7020D/V8020D/VR-307/309/357
BLOCK DIAGRAM
CIRCUIT DESCRIPTION
(0 : Pull down, 1 : Pull up)
TYPE BAND
Reception
frequency
Channel
IF
PLL standard
Diode sw
space
frequency
DSW3 DSW2 DSW1 DSW0
K1
FM 87.5MHz~108.0MHz 100kHz +10.7MHz 25kHz
0000
1700
AM 530kHz~1700kHz 10kHz +450kHz 10kHz
K2
FM 87.5MHz~108.0MHz 100kHz +10.7MHz 25kHz
0001
1610
AM 530kHz~1610kHz 10kHz +450kHz 10kHz
K4
FM 87.5MHz~108.0MHz 100kHz +10.7MHz 25kHz
1010
1700 RBDS
AM 530kHz~1700kHz 10kHz +450kHz 10kHz
E1
FM 87.5MHz~108.0MHz 50kHz +10.7MHz 25kHz
0011
AM 531kHz~1602kHz 9kHz +450kHz 9kHz
E3
FM 87.5MHz~108.0MHz 50kHz +10.7MHz 25kHz
RDS
AM 531kHz~1602kHz 9kHz +450kHz 9kHz
0101
FM L 65.0MHz~74.0MHz 10kHz +10.7MHz 5kHz
Q1
FM H 87.5MHz~108.0MHz 50kHz +10.7MHz 5kHz
1011
RDS
AM 531kHz~1602kHz 9kHz +450kHz 9kHz
M
K2/E1 is switched with only the setting of DSW1 (X11 : S601).
00X1
(DSW1 = 0 : K2 type, 1 : E1 type)
77 76 75 74
1. The back up item and initialization condition
1-1 Back up
• POWER : POWER OFF
• VOLUME LEVEL : -66dB
• AUDIO INPUT SELECTOR : TUNER
• VIDEO INPUT SELECTOR : VIDEO 1
• SPEAKER A : ON
• SPEAKER B : OFF
• BASS : 0dB
• TREBLE : 0dB
• INPUT LEVEL : 0dB
• SOURCE DIRECT : OFF
• MONITOR : OFF
• DIMMER : DIMMER 1 (LIGHTEST)
• LISTEN MODE : STEREO
• VIRTUAL SURROUND : OFF
• INPUT MODE : DIGITAL AUTO
• SUB WOOFER : YES(ON)
• FRONT SP. SIZE : NORMAL
• CENTER SP. SIZE : NORMAL
• SURROUND SP. SIZE : NORMAL
• DISTANCE : Fch 10ft/3m
: Cch 10ft/3m
: Sch 10ft/3m
KRF-V7020D/V8020D/VR-307/309/357
• FRONT (L,R) LEVEL : 0dB
• CENTER LEVEL : 0dB
• REAR (LS,RS) LEVEL : 0dB
• SUB WOOER LEVEL : 0dB
• MIDNIGHT : OFF
• BAND : FM
• FM FREQUENCY : 87.50MHz
• AM FREQUENCY : 531kHz(CH.SPACE 9kHz)
: 530kHz(CH.SPACE 10kHz)
• PRESET CH. : [ --ch ]
• PRESET MEMORY FREQUENCY
: PRESET MEMORY
FREQUENCY
• TUNING MODE : AUTO
1-2 The initial setting
While pressing POWER key, plug the AC power cord into
an AC outlet (K,P type) or turn on the AC POWER
switch.
2. Condition by the destination or model
3. TEST MODE
[setting method]
While pressing INPUT SELECTOR key, plug the AC
power cord into an AC outlet (K, P type) or turn on the
AC POWER switch. When a set is set up in test mode
condition a set becomes the following condition. Automatic POWER ON. All indicator tube (FL) and CLIP INDICATOR LED are lighted. The other LED are flashed.
A backup at the thing except ON/OFF of POWER is initialized.
[cancel method]
The power supply is turned off.
7
KRF-V7020D/V8020D/VR-307/309/357
FL DISPLAY (X09) ED51
11GRID
17SEGMENT
X8
X3
X3
X4
X3
X3
X2
X2
X2
(X09) S517
SERIAL
BUSY
DATA
VOLUME
ENCODER
(X09) S519
MULTI
ENCODER
(X09) S518
SELECTOR
ENCODER
(X09)
X4
X1
X3
X3
8.0MHz
CE
RESET
X3
X1
X3
AUDIO MUTE
TUNER MUTE
TUNER (X05) IC2
(X05) IC1
-20dB ATT
SD
STEREO
X1
11-MT-120GK
LED
(PEAK. LEVEL)
(DOLBY DIGITAL)
(STANDBY)
(X09) IC6,7
AUDIO SELECTOR
(X09) IC51
(X08) IC4,16,17
NJM2279M
(X09) A501
REMOCON
VIDEO SELECTOR IC
TC9163/9164
CXP82852-139Q
(X00) POWER Relay - (K1)
SP. A RELAY - (K1)
SP. B RELAY - (K2)
SURR RELAY - (K3)
CENTER RELAY - (K4)
(X08) IC1
DSP IC
(X08) IC2
DIR, ADC, DAC
YSS902 or
YSS912
CS4226KQG
(CRYSTAL)
(X08) IC5
FUNCTION SW
(X08) IC11
VOLUME IC
M62446FP
LC72131
TC9162
12
KR0
13
KR1
14
KR2
81
KS0 P.CH DOWN ON/STANDBY SPEAKER A
80
KS1 P.CH UP DIMMER SPEAKER B
79
KS2 BAND LISTEN MODE DOLBY VIRTUAL
78
KS3 AUTO SOUND MONITOR
77
KS4 MEMORY SETUP SOURCE DIRECT
76
KS5 INPUT MODE
75
KS6 DSW0 DSW1 DSW2
74
KS7
* No. of : u -COM Port NO.
DSW3 DSW (AC3)
Key matrix
CIRCUIT DESCRIPTION
4. Microprocessor CXP82852-139Q(X09 : IC51)
4-1 Microprocessor periphery block diagram
8
KRF-V7020D/V8020D/VR-307/309/357
CIRCUIT DESCRIPTION
4-2 Pin description
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 supply(+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 supply(+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
9
KRF-V7020D/V8020D/VR-307/309/357
CIRCUIT DESCRIPTION
Pin No. Pin Name I/O Description
61 FB.RLY O Front B speaker relay control. H=RELAY ON.
62 C.RLY O Center speaker relay control. H=RELAY ON
63 S.RLY O Rear speaker relay control. H=RELAY ON
64 POWER.RLY O Power relay control. H=RERAY ON
65 STANDBY.LED O Standby LED control.H=LED ON
66 DOL.DIG.LED O Dolby digital LED control.H=LED ON
67 DOL.VIR.LED O Dolby virtual LDE control.H=LED ON
68 DTS LED O DTS LED control. H=LED ON
69,70 None O No connect
71 PACk CTL O Non oscillation of power pack ic at power off. L=STOP OSCILLATION
72 DSP.IC O DSP(YSS902/912)/CS4226 initial clear .
73 None O No connect
74-81 P1-8/KS7-0 O Display segments 1-8 & key scan 7-0.
82-88 P9-15 O Display segments 9-15.
89 Vdd O Microprocessor power supply(+5V)
90,91 P16,17 O Display segments 16,17
92-100 G1-9 O Display grids 1-9.
10
XI
XO
CPO
SDOA0
24
19
9
8
23
22
567
12
88
2
89
15
878670
59 61
34
64
58
42 ~ 44
25 ~ 29
52
16
17
53
54
55
56
85
84
82
83
57
92 ~ 99
32 ~ 39
66
67
68
69
65
48
47
46
45
18
49
SDOA1
SDOA2
SDIB0
SDIB1
SDIB2
SDIB3
RAMD0~7
72 ~ 79
RAMCEN
RAMWEN
RAMOEN
RAMA0~16
OVFB
SDOB INTERFACE
SDIB INTERFACE
SDOA INTERFACE
SDIA INTERFACE
CRC
SDIASEL
SDIBSEL
IPORT0~7
CONT.
/SDBCK0
SDBCK0
SDWCK0
SDIA0
SDIA1
SURENC
STREAM0~7
OPERATION
CLOCK (30MHz)
KARAOKE
MUTE
CRC
AC3DATA
DTSDATA
NONPCM
PLL
DELAY RAM
L, R
Ls, Rs
C, LFE
INPUT
BUFFER
CONTROL REGISTER
U-COM INTERFACE
24 * 24
Main DSP
Dolby digital/ProLogic/DTS
DECODER
COEFFICIENT
PROGRAM
RAM
24 * 16
Sub DSP
DATA RAM
SDOB3
RAMD : RAM data
RAMA : RAM address
SDOB2
SDOB1
SDOB0
SDWCK1
SDBCK1
EXT. RAM
INTERFACE
CONT.
SDOACKSEL
SDIBCKSEL
SDOBCKSEL
ERAMUSE
/CS
SO
SI
SCK
OPORT0~7
/CSB
SCK
SI
5. Dolby digital/DTS IC: YSS902/YSS912 (X08: IC1)
5-1 Block diagram (YSS912)
CIRCUIT DESCRIPTION
KRF-V7020D/V8020D/VR-307/309/357
11
KRF-V7020D/V8020D/VR-307/309/357
CIRCUIT DESCRIPTION
5-2 Pin description
Pin No. Pin Name I/O Descriptions
1 Vdd1 - Power supply(+5V)
2~4 - - No connect
5~7 SDIB0~2 O PCM output port for sub DSP
8 XI I Crystal oscillation port.(902:6.25~50.0MHz,912:12.288MHz)
9 XO O Crystal oscillation port.
10 Vss - GND
11 AVdd - Power supply(+3.3V) for PLL
12~18 - - No connect
19 CPO O PLL output port.
20 AVss I GND
21 Vdd2 - Power supply(+3.3V)
22 SDOA2 O PCM output port from main DSP
23 - - No connect
24 SDOA0 O PCM output port from main DSP
25~29 - - No connect
30 Vss - GND
31 Vdd1 - Power supply(+5V)
32 - - No connect
33 OPORT1 O -
34~39 - - No connect
40 Vss - GND
41 Vdd2 - Power supply(+3.3V)
42-44 - - No connect
45 SDO2 O PCM output port from sub DSP(C,LFE/SWch)
46 SDO1 O PCM output port from sub DSP(LS,RSch)
47 SDO0 O PCM output port from sub DSP(FL,FRch)
48,49 - - No connect
50 Vss - GND
51 Vdd2 - Power supply(+3.3V)
52~59 - - No connect
60 Vss - GND
61 - - No connect
62 /IC I Initial clear port.
63,64 - - No connect
66 /CS I Microprocessor interface chip selector input port.
67 SO O Microprocessor interface serial data output port.
68 SI I Microprocessor interface serial data input port.
69 SCK I Microprocessor interface clock input port.
70 - - No connect
71 Vdd1 - Power supply(+5V)
72~79 - - No connect
80 Vss - GND
81 Vdd2 - Power supply(+3.3V)
82 SDIWCK 0 I Word clock for SD input ports.
83 SDIBCK 0 I Bit clock for SD input ports.
84 SDIA I AC3 bit stream data input port.
85~89 - - No connect
90 Vss - GND
91 Vdd2 - Power supply(+3.3V)
92,93 - - No connect
94 IPORT5 I Input port register
95 - - No connect
96~99 IPORT3~0 I Input port register
100 Vss - GND
12
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