JVC RX-7020VBK User manual

SERVICE MANUAL
AUDIO/VIDEO CONTROL RECEIVER
No.21075
Mar. 2002
COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.
RX-7020VBK
RX-7020VBK
Contents
Safety precautions --------------------------------------------------------1-2
Importance administering point on the safety --------------------- 1-3
Disassembly method -----------------------------------------------------1-4
Adjustment method -------------------------------------------------------1-9
Description of major ICs -------------------------------------------------1-10~24
Area suffix
J --------------------- U.S.A.
DVD VCR TV SOUND/DBS
ADJUST
RX-7020V AUDIO/VIDEO CONTROL RECEIVER
SETTING
MASTER VOLUME
CONTROL
DOWN UP
CD TAPE/CDR
SOURCE NAME
BASS BOOST
INPUT
ANALOG/DIGITAL
SPEAKERS ON/OFF
SURROUND MODE
PHONES
SURROUND ON/OFF
FM/AM TUNING
STANDBY
STANDBY/ON
FM/AM PRESET FM MODE
MEMORY
INPUT ATT
FM/AM
DVD MULTI
PHONO
SOURCE NAME
12
COMPULINK
Remote
CONTROL
231
564
897/P
0
+1010
BASSBOOST EFFECT
MENU
ENTER
TEST – REAR•L +
DIMMER
–SUBWOOFER+
–REAR•R +
MUTING
CH TV VOL
/REW FF/
VOLUME
CATV/DBS
CONTROL
TV/VIDEO
REC
PAUSE
RETURN FMMODE 100+
CONTROL
A/V CONTROL RECEIVER
RM-SRX7020J REMOTE CONTROL
CATV/DBS VCR TV AUDIO
SURROUND
MODE INPUTON/OFF
DVD MULTIDVD CD
TAPE/CDR
TREBLE
TV/DBS VCR PHONO
FM/AM
BASS
SURROUND ANALOG/DIGITAL SLEEP
–CENTER +
TUNING
SOUND

RX-7020VBK
1-2
1. This design of this product contains special hardware and many circuits and components specially for safety
purposes. For continued protection, no changes should be made to the original design unless authorized in
writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services
should be performed by qualified personnel only.
2. Alterations of the design or circuitry of the product should not be made. Any design alterations of the product
should not be made. Any design alterations or additions will void the manufacturer`s warranty and will further
relieve the manufacture of responsibility for personal injury or property damage resulting therefrom.
3. Many electrical and mechanical parts in the products have special safety-related characteristics. These
characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily
be obtained by using replacement components rated for higher voltage, wattage, etc.Replacement parts which
have these special safety characteristics are identified in the Parts List of Service Manual. Electrical
components having such features are identified by shading on the schematics and by ( ) on the Parts List in
the Service Manual. The use of a substitute replacement which does not have the same safety characteristics
as the recommended replacement parts shown in the Parts List of Service Manual may create shock, fire, or
other hazards.
4. The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be
separated from live parts, high temperature parts, moving parts and/or sharp edges for the prevention of
electric shock and fire hazard. When service is required, the original lead routing and dress should be
observed, and it should be confirmed that they have been returned to normal, after re-assembling.
5. Leakage currnet check (Electrical shock hazard testing)
After re-assembling the product, always perform an isolation check on the exposed metal parts of the product
(antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure the
product is safe to operate without danger of electrical shock.
Do not use a line isolation transformer during this check.
Plug the AC line cord directly into the AC outlet. Using a "Leakage Current Tester", measure the leakage
current from each exposed metal parts of the cabinet, particularly any exposed metal part having a return
path to the chassis, to a known good earth ground.Any leakage current must not exceed 0.5mA AC (r.m.s.).
Alternate check method
Plug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms per volt or more
sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15 F AC-type capacitor
between an exposed metal part and a known good earth ground.
Measure the AC voltage across the resistor with the AC
voltmeter.
Move the resistor connection to each exposed metal part,
particularly any exposed metal part having a return path to
the chassis, and meausre the AC voltage across the resistor.
Now, reverse the plug in the AC outlet and repeat each
measurement.Voltage measured any must not exceed 0.75 V
AC (r.m.s.).This corresponds to 0.5 mA AC (r.m.s.).
1.This equipment has been designed and manufactured to meet international safety standards.
2. It is the legal responsibility of the repairer to ensure that these safety standards are maintained.
3. Repairs must be made in accordance with the relevant safety standards.
4. It is essential that safety critical components are replaced by approved parts.
5. If mains voltage selector is provided, check setting for local voltage.
Good earth ground
Place this
probe on
each exposed
metal part.
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
1500 10W
0.15 F AC TYPE
!
Burrs formed during molding may
be left over on some parts of the
chassis. Therefore, pay attention to
such burrs in the case of
preforming repair of this system.
In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the
parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the " "
mark nearby are critical for safety.
(This regulation does not correspond to J and C version.)

RX-7020VBK
1-3
Caution: For continued protection against risk of
fire, replace only with same type 6.3A/125V for
F201, 2A/125V for F202 and F203.
This symbol specifies type of fast operating fuse.
Precaution: Pour eviter risques de feux, remplacez
le fusible de surete de F201 comme le meme type
que 6.3A/125V, et 2A/125V pour F202 et F203.
Ce sont des fusibles suretes qui functionnes rapide.
^
Importance administering point on the safety
Secondary parts
Primary part
FC211
FC212 R1
EP1
B106
B105
B104
TA201
TA202
PW104
PW102
PW105
PW103
PW101
B103
B102
B101
B108
B107
B109
B110
CN251
D205
FC221
FC222
FC231
FC232
R201
RY201
110
111 112113 114120 121
122 130131
B192
B191
B160
B159
6.3A-125V
2A-125V
2A-125V
F 201
F 203
F 202
LVA1029-C9
LVA1029-C7
6.3A-125V

RX-7020VBK
1-4
Remove the four screws A attaching the top cover on
both sides of the body.
Remove the three screws B on the back of the body.
Remove the top cover from behind in the direction of
the arrow while pulling both sides outward.
1.
2.
3.
Disassembly method
Removing the top cover (See Fig.1)
Prior to performing the following procedure, remove
the top cover.
Remove the power cord stopper from the rear panel
by moving it in the direction of the arrow.
Remove the thirty-two screws E attaching the each
boards to the rear panel on the back of the body.
Remove the four screws F attaching the rear panel
on the back of the body.
1.
2.
3.
Removing the rear panel (See Fig.4)
Prior to performing the following procedure, remove
the top cover.
Disconnect the card wire from connector CN402 on
the audio board and CN201 on the power supply
board in the front panel assembly.
Cut off the tie band fixing the harness.
Remove the three screws C attaching the front panel
assembly.
Remove the four screws D attaching the front panel
assembly on the bottom of the body. Detach the front
panel assembly toward the front.
1.
2.
3.
4.
Removing the front panel assembly
(See Fig.2 and 3)
Fig.1
Fig.2
Fig.3
Fig.4
A 2A 2
B
Top cover
C
Power supply
board
Audio board
CN402
Main
board
Tie band
D
E
E
FE
FF
Cord stopper
C
Front panel assembly
Front panel assembly
D
Rear panel
CN201
E
E
EEE

RX-7020VBK
1-5
Prior to performing the following procedure, remove
the top cover and the rear panel.
Cut off the tie band fixing the harness.
Disconnect the DSP board from connector CN481 on
the audio board.
Disconnect the audio input board, DVD board Video
board and the S video board from connector CN421,
CN431, CN441 and CN461 on the audio board.
Disconnect the
Component video board from
connector CN511 on the S video board.
Disconnect the tuner board from connector CN411
on the audio board.
1.
2.
3.
4.
5.
Removing each board connected to the
rear side of the audio board
(See Fig.5 to 9)
Fig.5
Fig.6
Fig.7
Fig.8
CN411
Tie band
DSP
board
DVD
board Video board
Tuner
board
Audio
input
board
DSP board
CN481
CN441
CN431
CN421
CN481
CN421
CN431 CN441
CN411
Tie band
CN421
CN431 CN441
Audio
input
board DVD
board Video
board
Tuner board
Audio
board
CN461
S Video
board
CN461 S Video
board
Component
video board
CN511
Fig.9
Component
video board
CN511

RX-7020VBK
1-6
Prior to performing the following procedure, remove
the top cover and the rear panel.
Removing the audio board (See Fig.10)
Disconnect the card wire from connector CN402 on
the audio board.
Disconnect the relay board from the audio board and
the power supply board. (CN291, CN491)
Disconnect the harness from connector CN471,
CN472, CN473.
Remove the three screws G attaching the audio
board assembly.
Remove the screw H attaching the audio board
assembly.
1.
2.
3.
4.
5.
Removing the Heat sink
(See Fig.12 to 14)
Prior to performing the following procedure, remove
the top cover, the rear panel and audio board.
Disconnect the harness from connector CN241 and
CN203 on the power supply board respectively.
Disconnect the harness from connector CN251 on
the power transformer board .
Remove the four screws I and the two screws J
attaching the main board.
1.
2.
3.
Removing the main board (See Fig.11)
Prior to performing the following procedure, remove
the top cover and main board.
Remove the two screws Kattaching the heat sink to
the reverse side of main board.
Disconnect the for connectors with each amp. board,
and remove the main board.
Remove the four screws M and ten screws L
attaching the heat sink.
1.
2.
3.
Fig.10
Fig.13
Fig.11
Fig.12
power
supply
board
Power / Fuse
board
Relay board
CN473
Audio board
Main board
rear side
Main
board
Heat sink
CN291
CN203
CN491 H
G
CN471
CN402
CN472
Power
transformer
G
G
CN241
I
I
I
I
JJ
LL
KK
MM
CN251
L
Fig.14
Main board
Rear Rch amp. board
Front Lch amp. board
Front Rch amp. board
Center amp. board
Rear Lch amp. board Heat sink
CN802CN801
CN302 CN301 CN901

RX-7020VBK
1-7
Prior to performing the following procedure, remove
the top cover and the rear panel.
Remove the screw O attaching the power / fuse
board.
Unsolder the power cord and other harnesses
connected to the power / fuse board.
1.
2.
Removing the power / fuse board
(See Fig.15)
Prior to performing the following procedures, remove
the top cover.
Cut off the tie band fixing the harness.
Unsolder the two harnesses connected to the power
transformer.
Unsolder the harness connected to the FW201 on
the power transformer board.
Remove the four screws N attaching the power
transformer.
1.
2.
3.
4.
Removing the power transformer
(See Fig.15)
Prior to performing the following procedure, remove
the top cover and the front panel.
Remove the one nut attaching the headphone jack of
the power supply board on the front side of the body.
Disconnect the harness connected to connector
CN241, CN201, CN203, and CN291 on the power
supply board (If necessary, cut off the band fixing the
harness on the side of the base chassis).
Remove the three screws P attaching the power
supply board and pull out the power supply board
from the front bracket backward.
Unsolder the three harnesses connected to the
power supply board.
1.
2.
3.
4.
Removing the power supply board
(See Fig.16 , 17)
Fig.15
Fig.16
Fig.17
Power
supply
board
Power
transformer
N
CN241
Solder
points
N
Solder
points
Solder
points
O
Power / fuse board
Power cord
Power
supply
board
Nut
Headphone jack
Headphone jack
Tie band
Solder points
P
P
P
Solder
points
CN201
CN291
Hook
Power
transformer
board
FW201
CN203

RX-7020VBK
1-8
Prior to performing the following procedure, remove
the top cover and the front panel assembly.
Pull out the volume knob on the front side of the front
panel and remove the nut attaching the system
control board.
Remove the two screws Q attaching the power
switch board.
Disconnect the harness from connector CN714 on
the power switch board.
Remove the six screws R attaching the system
control board on the back of the front panel.
On the back of the front panel, release the six joints
by pushing the joint tabs inward.
Remove the operation switch panel toward the front.
Release the two hook attaching the system control
board.
1.
2.
3.
4.
5.
6.
Removing the system control board /
power switch board (See Fig.18 to 20)
Fig.18
Fig.19
Fig.20
Front panel assembly
Nut
Volume knob
System control board
Power switch
board
RR
CN714
Q
Joint
Joint
Joint Joint Joint Joint
Hook Hook
Operation switch panel

RX-7020VBK
1-9
Adjustment method
<Adjustment method>
1. Set the volume control to minimum during this adjustment. (No signal & No load)
2. Set the surround mode OFF.
3. Turn VR301 and VR302 fully counterclockwise to warm up before adjustment.
If the heat sink is already warm from previous use the correct adjustment can not be made.
4. For L-ch, connect a DC voltmeter between TP301's B216 and B217 (Lch)
and, connect it between TP302's B218 and B219 (Rch).
5. Adjust the VR301 (Lch) and VR302 (Rch) so that the DC voltmeter indicates 2.0mV
immediately after turning the power on.
1. Tuner range
FM 87.5MHz~108.0MHz
AM (MW) 530kHz~1710kHz
Tuner section
Power amplifier section
TP302 (Rch)
VR301 (Lch)
VR302 (Rch)
Heat sink
Adjustment of idling current
Measurement location TP301 (Lch) , TP302 (Rch)
Adjustment part VR301 (Lch) , VR302 (Rch)
Attention
This adjustment does not obtain a correct adjustment value immediately after the amplifier is
used (state that an internal temperature has risen).
Please adjust immediately after using the amplifier after turning off the power supply of the
amplifier and falling an internal temperature.
* It is not abnormal though the idling current might not become 0mA even if it is finished to turn variable
resistance (VR301, VR302) in the direction of counterclockwise.
TP301 (Lch)

RX-7020VBK
1-10
1
2
3
4
5
6
7
8
9
10
11
33
32
31
30
29
28
27
26
25
24
23
12 13 14 15 16 17 18 19 20 21 22
44 43 42 41 40 39 38 37 36 35 34
1.Pin layout
AK4527BVQP (IC601) : A/D,D/A converter
Top View
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Symbol
SDOS
OSKS
MIS
BICK
LRCK
SDTI1
SDTI2
SDTI3
SDTO
D,AUX
DFS
DEMI
DEMO
MCKO
DVDD
DVSS
PD
XTS
SDTO Source Select Pin (Note 1)
"L" : Internal ADC output, "H" : DAUX input
Control Mode Select Pin
"L" : 3-wire Serial, "H" : I
2 C Bus
Soft Mute Pin (Note 1), Connect to GND
When this pin goes to "H", soft mute cycle is initialized.
When returning to "L", the output mute releases.
Audio Serial Data Clock Pin
Input Channel Clock Pin
DAC1 Audio Serial Data Input Pin
DAC2 Audio Serial Data Input Pin
DAC3 Audio Serial Data Input Pin
Audio Serial Data Output Pin
Sub Audio Serial Data Input Pin, Connect to GND
Double Speed Sampling Mode Pin (Note 1)
"L" : Normal Speed, "H" : Double Speed
Connect to GND
No internal bonding.
Zero Input Detect Enable Pin, Connect to GND
"L" : mode 7 (disable) at parallel mode,
zero detect mode is selectable by DZFM2-0 bits at serial mode.
"H" : mode 0 (DZF is AND of all six channels)
Output Buffer Power supply Pin, 2.7V~5.5V
Digital Power Supply Pin, 4.5V~5.5V
De-emphasis Pin, 0V
Power-Down & Reset Pin
When "L", the AK4527B is powered-down and the control registers are reset to default
state.If the state of P/S or CAD0-1 changes, then the AK4527B must be reset by PDN.
Test Pin, Connect to GND
This pin should be connected to DVSS.
Function
I/O
I
I
-
I
I/O
I
I
I
O
-
-
-
-
-
-
-
I
-
I
-
2. Pin function (1/2)
Description of major ICs

RX-7020VBK
1-11
No.
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
Symbol
ICKS
ADIF
CAD1
CAD0
LOUT3
ROUT3
LOUT2
ROUT2
LOUT1
ROUT1
LIN-
LIN+
RIN-
RIN+
VREFL
OVF
VCOM
VREFH
AVDD
AVSS
XTI
XTO
P1S
CS
CSN
DIF1
SCL/CCLK
LOOP0
SAD/CDTI
CDTD
Connect to GND
No internal bonding.
Analog Input Format Select Pin, Digital Power Supply
"H" : Full-differential input, "L" :Single-ended input
Chip Address 1 Pin, Connect to GND
Chip Address 0 Pin, Connect to GND
DAC3 Lch Analog Output Pin
DAC3 Rch Analog Output Pin
DAC2 Lch Analog Output Pin
DAC2 Rch Analog Output Pin
DAC1 Lch Analog Output Pin
DAC1 Rch Analog Output Pin
Lch Analog Negative Input Pin
Lch Analog Positive Input Pin
Rch Analog Negative Input Pin
Rch Analog Positive Input Pin
Zero Input Detect 2 Pin (Note 2), Non Connect
When the input data of the group 1 follow total 8192LRCK cycles with "0"
input data, this pin goes to "H".
Analog Input Overflow Detect Pin (Note 3)
This pin goes to "H" if the analog input of Lch or Rch is overflows.
Common Voltage Output Pin,AVDD/2
Large external capacitor around 2.2uF is used to reduce power-supply noise.
Positive Voltage Reference Input Pin,AVDD
Analog Power Supply Pin,4.5V~5.5V
Analog Ground Pin,0V
Zero Input Detect 1 Pin (Note 2), Non connect
When the input data of the group 1 follow total 8192 LRCK cycles with "0"
input data, this pin goes to "H".
Master Clock Input Pin
Parallel / Serial Select Pin
"L" : Serial control mode, "H" : Parallel control mode
Audio Data Interface Format 0 Pin in parallel mode
Chip select pin in 3-wire serial control mode
This pin should be connected to DVDD at I2C bus control mode
Audio Data Interface Format 1 Pin in parallel mode
Control Data Clock Pin in serial control mode
I2C = "L" : CCLK(3-wire Serial), I2C = "H" : SCL(I2CBus)
Loopback Mode 0 Pin in parallel control mode
Enables digital loop-back from ADC to 3 DACs.
Control Data Input Pin in serial control mode
I2C = "L" : CDTI(3-wire Serial), I2C = "H" : SDA(I2CBus)
Loopback Mode 1 Pin (Note 1)
Enable all 3 DAC channels to be input from SDTII.
Function
AK4527
I/O
-
-
-
-
O
O
O
O
O
O
I
I
I
I
-
O
O
-
-
-
-
I
-
I
I
I
I
I
I/O
I
Pin function (2/2)
Notes : 1. SDOS, SMUTE, DFS, and LOOP1 pins are ORed with register data if P/S = "L".
2.The group 1 and 2 can be selected by DZFM2-0 bit if P/S = "L" and DZFME = "L".
3.This pin becomes OVF pin if OVFE bit is set to "1" at serial control mode.
4. All input pins should not be left floating.

RX-7020VBK
1-12
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
OUT4
OUT3
OUT2
OUT1
AVDD
SWIN
GNDS
SRin
SLin
GNDC
Cin
GNDR
Rin
GNDL
Lin
BYPASSR
BYPASSL
LTRE
LBASS3
LBASS2
LBASS1
DVDD
CLK
DATA
LATCH
DGND
AGND
SWout
SRout
SLout
Cout
Rout
Lout
AVSS
CL1
CL2
CR1
CR2
RTRE
RBASS3
RBASS2
RBASS1
OUT-
PUT
PORT volume
volume
volume
volume
volume
volume
MCU
I/F
tone tone
1.Block Diagram
M62446FP (IC428) : 6ch master volume

RX-7020VBK
1-13
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
OUT4
OUT3
OUT2
OUT1
AVDD
SW IN
A.GND
RR IN
RL IN
A.GND
C IN
A.GND
R IN
A.GND
L IN
LTRE
LBASS3
LBASS2
KBASS1
CR2
RBASS2
RBASS3
RTRE
RBASS1
CR1
LL2
CL1
AVSS
L OUT
R OUT
C OUT
RL OUT
RR OUT
SW OUT
A.GND
D.GND
VOL LACH
VOL DATA
VOL CLK
DVDD
O
O
O
O
-
I
-
I
I
-
I
-
I
-
I
-
-
-
-
-
-
O
-
-
-
-
I
O
I
-
O
O
O
O
O
O
-
-
I
I
I
-
BASS BOOST control terminal
SURROUND control terminal
VIDEO 2 control terminal
VIDEO 1 control terminal
Analog positive power supply terminal
SUB Woofer volume signal input terminal
Analog ground terminal
R ch volume signal input terminal for rear speaker
L ch volume signal input terminal for rear speaker
Analog ground terminal
Center volume signal input terminal
Analog ground terminal
R ch volume signal input terminal
Analog ground terminal
L ch volume signal input terminal
Non connect
Non connect
Frequency adjustment terminal tone/treble
Frequency adjustment terminal tone/bass
Frequency adjustment terminal tone/bass
Frequency adjustment terminal tone/bass
Tone output terminal
Frequency adjustment terminal tone/bass
Frequency adjustment terminal tone/bass
Frequency adjustment terminal tone/treble
Frequency adjustment terminal tone/bass
L/R volume input terminal
Tone output terminal
L/R volume input terminal
Analog negative power supply terminal
L ch output
R ch output
Center volume signal output terminal
L ch volume signal output terminal for rear speaker
R ch volume signal output terminal for rear speaker
SUB Woofer volume signal output terminal
Analog ground terminal
Digital ground terminal
Latch input terminal
Volume data input terminal
Clock input terminal for data transfer
Digital power supply terminal
Pin No. Symbol I/O Function
2.Pin Function M62446FP

RX-7020VBK
1-14
Pin No. Symbol I/O Function
MN101C35DJW (IC701) : System controller
2. Pin function (1/2)
75
51
100 76
26 50
1
25
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
I
I
I/O
O
O
I
I
-
I/O
I/O
-
-
-
-
-
I
I
I
I
I
I
I
I
-
I
I
O
I
O
I
O
I/O
I
I
I
I
I
I
O
I
VOL.JOG IN_1
VOL.JOG IN_2
DATA (PLL)
CLK (PLL)
DE (PLL)
VIDEO S/C DVD
VIDEO S/C VCR
VDD
OSC2
OSC1
VSS
NC
KEY IN 1
KEY IN 2
KEY IN 3
KEY IN 4
KEY IN 5
INH IN
CS 1
CS 2
VREF+
VIDEO S/C DBS
RESET
CLK (RDS)
DCS IN
DCS OUT
VCR IN
VCR OUT
DATA (RDS)
PROTECTOR IN
RM IN
TUNED IN
STEREO IN
DAVN (RDS)
SELF DET
COMMAND (DSP)
STATUS (DSP)
1. Pin layout
VOL.JOG IN_1
VOL.JOG IN_2
DATA (PLL)
CLK (PLL)
DE (PLL)
VIDEO S/C DVD
VIDEO S/C VCR
Power supply +5V
Connecting the crystal oscillator for system clock (8MHz)
Connecting the crystal oscillator for system clock (8MHz)
Connect to GND
Connect to GND
Non connect
Connect to GND
Connect to GND
KEY INPUT 1
KEY INPUT 2
KEY INPUT 3
KEY INPUT 4
KEY INPUT 5
INH IN
CHIP SELECT 1
CHIP SELECT 2
Power supply +5V
VIDEO S/C DBS
RESET INPUT
RDS CLK OUT (RDS)
DCS INPUT
DCS OUTPUT
AVLINK VCR IN
AVLINK VCR OUT
RDS DATA (RDS)
PROTECTOR IN
REMOCON INPUT
TUNED IN (TUNER)
STEREO IN (TUNER)
RDS DAVN (RDS)
SELF DET INPUT
COMMAND (DSP)
STATUS (DSP)

RX-7020VBK
1-15
Pin No. Symbol I/O Function
Pin function (2/2)
41
42
43
44
45
46
47
48
49 ~ 64
65 ~ 80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
CLK DSP
READY
RESET
RY S
RY C
RY L/R1
RY L/R2
RY HP
GRID16~GRID1
SEG1~SEG16
NC
NC
NC
NC
NC
NC
NC
POWER
S MUTE
SW MUTE
TU MUTE
STB LED
SURROUND
DATA
CLK
STB
LATCH
DATA
CLK
VPP
O
O
O
O
O
O
O
O
O
O
-
-
-
-
-
-
-
-
O
O
O
O
O
O
O
O
O
O
O
-
CLK (DSP)
READY (DSP)
RESET (DSP)
RELAY SURRUND
RELAY CENTER
RELAY FRONT 1
RELAY FRONT 2
RELAY HEADPHONE
FL GRID SIGNAL CONTROL OUT
FL SEGMENT SIGNAL CONTROL OUT
Non connect
Non connect
Non connect
Non connect
Non connect
Non connect
Non connect
POWER ON Relay Control
SOUSE MUTE
SUBWOOFER MUTE
TUNER MUTE
STANDBY LED
SURROUND
AUDIO SW DATA
CLK (AUDIO SW)
STB (AUDIO SW)
LATCH (VOLUME)
VOLUME DATA
CLK (VOLUME)
VPP
MN101C35DJW

RX-7020VBK
1-16
Pin No.
Symbol I/O Function
UPD784215AGC167 (IC671) : Dital signal controller
1
25
75
51
100 76
26 50
~
~
~
~
1.Pin layout
2.Pin function (1/2)
VDD
X2
X1
VSS
XT2
XT1
RESET
AUTODATA
LOCK
DIGITAL0
FORMAT
CHANNEL
ERR
REST IN
AVDD
AVREF0
AVSS
AV REF1
RX
TX
DSPCOM
DSPSTS
DSPCLK
DSPRDY
MIDIO IN
MIDIO OUT
MICK
MICS
Non connect
Power supply terminal
Connecting the crystal oscillator for system main clock
Connecting the crystal oscillator for system main clock
Connect to GND
Connecting the crystal oscillator for system sub clock
Connecting the crystal oscillator for system sub clock
System reset signal input
Output of DSP to general-purpose port
Output of DSP to general-purpose port
Output of DSP to general-purpose port
Output of DSP to general-purpose port
Output of DSP to general-purpose port
Output of DSP to general-purpose port
Reset signal input
Power supply terminal
Connect to GND
Connect to GND
Connect to GND
Connect to GND
Connect to GND
Connect to GND
Connect to GND
Connect to GND
Connect to GND
Connect to GND
Non connect
Power supply terminal
Not use
Not use
Non connect
Communication port from IC701
Status communication port to IC701
Clock input from IC701
Ready signal input from IC701
Non connect
Interface I/O terminal with microcomputer
Interface I/O terminal with microcomputer
Interface I/O terminal with microcomputer of clock signal
Interface I/O terminal with microcomputer of chip select
1~8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34,35
36
37
38
39
40
41
42
43
44
45
46
47
48
-
-
O
I
-
O
I
I
I
I
I
I
I
I
I
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
I
O
I
I
-
I/O
I/O
O
O

RX-7020VBK
1-17
UPD784215AGC167
Pin No.
Symbol I/O Function
49
50
51
52
53
54~63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
MILP
MIACK
DSPRST
CODEC OUT
CODEC IN
CODEC CLK
CODEC CS
CODEC XTS
PD
GND
VDD
ANA/T-TONE
LEF-MIX
D.MUTE
S.MUTE
ASW1
ASW2
ASW3
ASW4
TEST
O
O
-
-
O
-
I/O
I/O
O
O
-
-
-
O
-
-
-
-
-
-
-
-
-
-
-
-
O
O
-
O
O
-
O
O
O
O
-
-
-
-
-
-
-
Interface I/O terminal with microcomputer
Interface I/O terminal with microcomputer
Non connect
Non connect
Reset signal output of DSP
Non connect
Interface I/O terminal with microcomputer
Interface I/O terminal with microcomputer
Interface I/O terminal with microcomputer of clock signal
Interface I/O terminal with microcomputer of chip select
Non connect
Non connect
Non connect
Reset signal output
Connect to GND
Non connect
Non connect
Non connect
Non connect
Non connect
Non connect
Non connect
Non connect
Power supply
Non connect
Non connect
Test tone control
Control at output destination of LFE channel
Non connect
Mute of the digital out terminal is controlled
Mute of the audio signal is controlled
Non connect
Selection of digital input selector
Selection of digital input selector
Selection of digital input selector
Selection of digital input selector
Test terminal
Non connect
Non connect
Non connect
Non connect
Non connect
Non connect
Pin function (2/2)

RX-7020VBK
1-18
2. Pin Function
Pin
No. Symbol I/O Function Function
I/O
Symbol
Pin
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
FM IN
AM MIX
FM IF
AM IF
GND
TUNED
STEREO
VCC
FM DET
AM SD
FM VSM
AM VSM
MUTE
FM/AM
MONO/ST O
I
I/O
O
O
I
O
I
I
I
O
O
III
II
This is an input terminal of FM IF
signal.
This is an out put terminal for AM
mixer.
Bypass of FM IF
Input of AM IF Signal.
This is the device ground terminal.
When the set is tunning,this terminal
becomes "L".
Stereo indicator output. Stereo "L",
Mono: "H"
This is the power supply terminal.
FM detect transformer.
This is a terminal of AM ceramic filter.
Adjust FM SD sensitivity.
Adjust AM SD sensitivity.
When the signal of IF REQ of IC121(
LC72131) appear, the signal of FM/AM
IF output. //Muting control input.
Change over the FM/AM input.
"H" :FM, "L" : AM
Stereo : "H", Mono: "L"
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30 OSC BUFFER
AM OSC
REG
AM RF
AFC
AM AGC
O
I
O
I
I
I
AM Local oscillation Signal output.
This is a terminal of AM Local
oscillation circuit.
Register value between pin 26 and pin28
besides the frequency width of the
input signal.
AM RF signal input.
This is an output terminal of voltage
for FM-AFC.
This is an AGC voltage input terminal
for AM
O
O
I
O
AM detection output.
FM detection output.
Mpx input terminal
O
O
I
Left channel signal output.
Right channel signal output.
Input terminal of the Left channel post
AMP.
Input terminal of the Right channel
post AMP.
I
O
Mpx Left channel signal output.
Mpx Right channel signal output.
L OUT
R OUT
L IN
R IN
RO
LO
MPX IN
FM OUT
AM DET
1. Block Diagram
ALC
BUFF
AM
OSC
REG
AM
MIX FM
RF.AMP
AGC
AM IF DET
SD
COMP AM
S-METER
FM
S-METER
FM IF PM
DET
S-CLRVE AM/FM
IF-BUFF TUNING
DRIVE
GND VCC
STEREO
DRIVE
MUTE
DECODER
ANIT-BIRDIE
STEREO
5N
SW
P-DET
PILOT
DET
FF
19k
FF
19k
FF
38k
VCO
384KHz /
2/
LS
30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
1234678910 11 12 13 14 15
5
LA1838 (IC102) : FM AM IF amp. & Detector, FM MPX decoder

RX-7020VBK
1-19
1. Pin layout
1
2
3
4
5
6
7
8
9
10
11
22
21
20
19
18
17
16
15
14
13
12
XT
FM/AM
CE
DI
CLOCK
DO
FM/ST/VCO
AM/FM
SDIN
XT
GND
LPFOUT
LPFIN
PD
VCC
FMIN
AMIN
IFCONT
IFIN
Pin
No.
1
2
3
4
5
6
7
8
9
10
11
Pin
No.
12
13
14
15
16
17
18
19
20
21
22
Symbol
XT
FM/AM
CE
DI
CLOCK
DO
FM/ST/VCO
AM/FM
LW
MW
SDIN
Symbol
IFIN
IFCONT
AMIN
FMIN
VCC
PD
LPFIN
LPFOUT
GND
XT
Function
X'tal oscillator connect (75kHz)
LOW:FM mode
When data output/input for 4pin(input) and
6pin(output): H
Input for receive the serial data from
controller
Sync signal input use
Data output for Controller
Output port
"Low": MW mode
Open state after the power on reset
Input/output port
Input/output port
Data input/output
Function
IF counter signal input
IF signal output
Not use
AM Local OSC signal output
FM Local OSC signal input
Power suplly(VDD=4.5-5.5V)
When power ON:Reset circuit move
PLL charge pump output(H: Local OSC
frequency Height than Reference frequency.
L: Low Agreement: Height impedance)
Input for active lowpassfilter of PLL
Output for active lowpassfilter of PLL
Connected to GND
X'tal oscillator(75KHz)
I/O
I
O
I
I
I
O
O
O
I/O
I/O
I/O
I/O
I
O
-
I
I
-
O
I
O
-
I
Reference
Driver Phase
Detector
Charge Pump
Unlock
Detector
Universal
Counter
Swallow Counter
1/16,1/17 4bit
12bit
Programmable
DriverS
Swallow Counter
1/16,1/17 4bit
Data Shift Register & Latch
Power
on
Reset
C
2 B
I/F
1/2
78211 13
21
17
6
5
4
3
15
16
22
118
19
20
12
2. Block diagram
3. Pin function
LC72136N (IC121) : PLL frequency synthesizer

RX-7020VBK
1-20
DLCKS terminal
L
L
H
H
DLONterminal
L
H
L
H
DLL clock setting
SCKI input (DLL circuit OFF)
Four times XI clock
Three times XI clock
Six times XI clock
1
2
3
4
5
6
7
8~11
12
13
14
15
16~18
19
20
21
22
23
24
25
26
27,28
29~30
31
32,33
34
35
36
37
38,39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54~61
62
63~70
71
72~80
81
82~89
90
91
92,93
94
95
96
97
98,99
100
Pin No. Symbol I/O Function
RST
MIMD
MICS
MILP
MIDIO
MICK
MIACK
FI0~3
IRQ
VSS
LRCKA
BCKA
SDO0~2
SD03
LRCKB
BCKB
SDT0
SDT1
VDD
LRCKOA
BCKOA
TEST0,1
LRCKOB,BCKOB
TXO
TEST2,3
RX
VSS
TSTSUB0
FCONT
TSTSUB1,TSTSUB2
PDO
VDDA
PLON
AMPI
AMPO
CKI
VSSA
CKO
LOCK
VSS
WR
OE
CE
VDD
IO7~0
VSS
AD0~7
VDD
AD8~16
VSS
PO0~7
VDDDL
LPFO
DLON,DLCKS
SCKO
VSSDL
SCKI
VSSX
XO,XI
VDDX
I
I
I
I
I/O
I
O
I
I
-
I
I
O
-
I
I
I
I
-
O
O
I
-
O
I
I
-
I
O
I
O
-
I
I
O
I
-
O
O
-
O
O
O
-
I/O
-
O
-
O
-
O
-
O
I
-
-
I
-
I/O
-
Reset signal input terminal (L:reset H: normal operation)
Microcomputer interface mode selection input terminal (L:serial H:IC bus)
Microcomputer interface chip select input terminal
Microcomputer interface latch pulse input
Microcomputer interface data I/O terminal
Microcomputer interface clock input terminal
Microcomputer interface acknowledge output terminal
Flag input terminal 0~3
Interrupt input terminal
Digital ground terminal
Audio interface LR clock input terminal A
Audio interface bit clock input terminal A
Audio interface data output terminal 0
Non connect
Audio interface LR clock input terminal B
Audio interface bit clock input terminal B
Audio interface data input terminal 0
Audio interface data input terminal 1
Power supply for digital circuit
Audio interface LR clock output terminal A
Audio interface bit clock output terminal A
Test input terminal 0/1 (L:test H: normal operation)
Non connect
SPDIF Output
Test input terminal (L:test H: normal operation)
SPDIF input terminal
Ground terminal for digital circuit
Test sub input terminal 0 (L:test H: normal operation)
VCO Frequency control output terminal
Test sub input terminal 1,2 (L:test H: normal operation)
Phase detect signal output terminal
Power supply for analog circuit
Clock selection input terminal (L:external clock H:VCO clock)
amplifier input terminal for LPF
amplifier output terminal for LPF
External clock input terminal
Ground terminal for analog circuit
DIR Clock output terminal
VCO Lock output terminal
Ground terminal for digital circuit
External SRAM writing signal output terminal
External SRAM output enable signal output terminal
External SRAM chip enable signal output terminal
Power supply terminal for digital circuit
External SRAM data I/O terminal 7~0
Ground terminal for digital circuit
External SRAM address output terminal 0~7
Power supply terminal for digital circuit
External SRAM address output terminal 8~16
Ground terminal for digital circuit
General purpose output terminal 0~7
Power supply terminal for DLL
LPF output terminal for DLL
Refer to the undermentioned table
Non connect
Ground terminal for DLL
External system clock input terminal
Ground termonal for oscillation circuit
Oscillation I/O terminal
Power supply terminal for oscillation circuit
TC9446F-025 (IC631) : Digital signal processor for dolby digital (AC-3)
/ DTS audio decode