Jvc RX-7720-VBK Service Manual

SERVICE MANUAL

AUDIO/VIDEO CONTROL RECEIVER

RX-7520VBK

Area suffix

RX-7520VBK

FM MODE

FM/AM TUNING

STANDBY

STANDBY/ON

SURROUND ON/OFF

SURROUND MODE

PHONES

Contents

FM/AM PRESET FM MODE

INPUT

ANALOG/DIGITAL

INPUT ATT

SPEAKERS ON/OFF

12

C ------------------- Canada

RX-7520V

AUDIO/VIDEO CONTROL RECEIVER

COMPULINK

MEMORY

BASS BOOST

DVD MULTI

DVD VCR

TAPE/CDR

SOURCE NAME

FM

CD

TV SOUND

ADJUST

CONTROL

DOWN UP

AM

MASTER VOLUME

SETTING

Remote

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

No.21097

Apr. 2002

RX-7520VBK

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 circuitr y 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 fur ther 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 par ts 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.).

0.15 F AC TYPE

1500 10W

Good earth ground

AC VOLTMETER (Having 1000 ohms/volts, or more sensitivity)

Place this probe on each exposed metal part.

!

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 m ust 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.

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 pr inted 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.)

1-2

Importance administering point on the safety

LVA1029-C9

B110

Primary part

PW105

PW104

B109

B108

B106

B105

PW102

B107

TA201

TA202

RX-7520VBK

Secondary parts

PW103

PW101

R201

B104

B103

B102

B101

FC232

F 203

FC231

FC211

6.3A-125V

F 201

6.3A-125V

FC212

122

FC222

F 202

2A-125V

FC221

R1

121

2A-125V

CN251

EP1

110

111 112113

B191

B159

RY201

114120

130131

B192

B160

D205

LVA1029-C7

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.

^

1-3

RX-7520VBK

y.

g

.

d

)

.

g

.

y.

3.

)

.

y

y.

.

y.

y

.

3.

g

)

1

2

Top cover

y

d

Audio board

02

n

d

r

y

Disassembly metho

Removing the top cover (See Fig.1

Remove the four screws A attaching the top cover on both sides of the bod

Remove the three screws B on the back of the bod

3

Remove the top cover from behind in the direction of the arrow while pullin

both sides outward

A

B

2

A

2

Fig.

C

Removing the front panel assembly

(See Fi

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 suppl board in the front panel assembl

Cut off the tie band fixing the harness Remove the three screws C attaching the front panel

assembl Remove the four screws D attaching the front panel

assembl panel assembl

on the bottom of the body. Detach the front

toward the front

.2 and 3

Tie ban

Mai

boar

N4

CN201

ower suppl

oar

Fig.

Front panel assembl

Removing the rear panel (See Fig.4

Prior to performing the following procedure, remove the top cover

Remove the power cord stopper from the rear panel by movin

Remove the twenty-six screws E attaching the each boards to the rear panel on the back of the bod

Remove the four screws F attaching the rear panel on the back of the bod

1-4

Fig.3

it in the direction of the arrow

E

Cord stoppe

E

F

Rear panel

F

Fig.4

E

F

.

e aud

d.

e

d

CN5

.

,

.

e aud

d.

3.

5.

Removing each board connected to the

ear side o

audio board

)

SP

d

board

T

r

d

o

t

board

d

81

1

31

1

udio

t

board

d

Tuner board

o

d

61

d

61

d

1

r

f the

(See Fig.5 to 9

Prior to performing the following procedure, remove the top cover and the rear panel

Cut off the tie band fixing the harness

Audi

boar

RX-7520VBK

CN411

Disconnect the DSP board from connector CN481 on th

Disconnect th connector

io boar

Component video boar

11 on the S video board

from

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 tuner board from connector CN411 on th

io boar

Component video board

N51

D

boar

N4 N42

Audi

inpu

board

N4

boar

Video

N44

boar

Fig.5

N4

N51

Tie band

une

boar

Component

video board

DSP boar

CN421

CN431

Tie band

Fig.8

Fig.9

CN441

N4

Video

boar

CN411

CN481

CN421

A

inpu

board

CN431

Fig.6

boar

Fig.7

Video boar

CN441

1-5

RX-7520VBK

.

)

aud

d.

)

,

.

y.

3.

5.

g

)

.

y.

.

J

.

3.

)

.

e reverse side

d.

s

.

3.

r

supply

d

y

e

d

3

Audio board

board

91

02

e

ans

er

d

Removing the audio board (See Fig.10

Prior to performing the following procedure, remove the top cover and the rear panel

Disconnect the card wire from connector CN402 on the

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 assembl

Remove the screw H attaching the audio board assembl

io boar

Removing the main board (See Fig.11

Prior to performing the following procedure, remove the top cover, the rear panel and audio board

N47

N4

G

CN471

I

J

CN472

G

CN491

Fig.10

I

Relay board

H

CN241

powe

supply

oar

board

N2

Pow

r

form

tr

Power / Fus

oar

J

CN251

Disconnect the harness from connector CN241 and CN203 on the power supply board respectivel

Disconnect the harness from connector CN251 on the power transformer board

Remove the four screws I and the two screws attaching the main board

Removing the Heat sink (See Fi

Prior to performing the following procedure, remove the top cover and main board

Remove the two screws attaching the heat sink to th

Disconnect the for connectors with each amp. board,

nd remove the main boar

Remove the four screw attaching the heat sink

of main boar

.12 to 14

nd ten screw

I

Main

I

K

ear Lch amp. boar

Rear Rch amp. boar

Fig.11

Fig.12

Heat sink

CN203

K

Main board

rear side

Front Rch amp. board

Front Lch amp. board

Center amp. board

1-6

Heat sink

M

L

Main board

M

CN802

CN801

CN302

Fig.14

Fig.13

CN301

CN901

.

d.

.

d

)

.

ans

.

ans

.

3.

Removing the power transforme

r

)

.

y

y.

ess c

g

).

y

e

backward.

y

.

3.

g

)

5

6

er

supply

d

y

er

1

r

s

r

s

r

d

y

d

k

d

s

r

s

91

ook

ans

er

d

01

03

(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

former

tr

nsolder the harness connected to the FW201 on

the power transformer board Remove the four screws N attaching the power

former

tr

Removing the power / fuse boar

(See Fig.15

Prior to performing the following procedure, remove the top cover and the rear panel

Remove the screw O attaching the power / fuse

oar

Power tr

oar

form

olde

point

Power cor

Fig.1

RX-7520VBK

Pow

oar

board

FW2

olde

point

ower

ransform

olde

Unsolder the power cord and other harnesses connected to the power / fuse board

Removing the power supply board

(See Fi

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 suppl

Disconnect the harn CN241, CN201, CN203, and CN291 on the power supply board (If necessary, cut off the band fixin harness on the side of the base chassis

Remove the three screws P attaching the power

board and pull out the power supply board

suppl from th

front bracket

nsolder the three harnesses connected to the

power suppl

board on the front side of the bod

onnected to connector

board

.16 , 17

the

Power

suppl

oar

CN201

P

N24

N2 N2

H

hone jack

Fig.1

Headphone jac

P

olde

point

Tie ban

Solder point

Fig.17

1-7

RX-7520VBK

y.

c

d.

s

d.

.

d.

3.

5.

g

)

8

0

b

d

ch

d

4

J

t

J

t

J

t

J

t

J

t

J

t

ook

l

Removing the system control board / power switch board (See Fi

Prior to performing the following procedure, remove the top cover and the front panel assembl

Pull out the volume knob on the front side of the front panel and remove the nut attaching the system

ontrol boar

Remove the two screws Q attaching the power

witch boar

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

oar

.18 to 20

Operation switch pane

Fig.1

oin

Volume kno

Power swit

boar

oin

Fig.19

System control boar

H

ig.2

oin

H

N71

1-8

Adjustment method

Tuner section

1. Tuner range FM 87.5MHz~108.0MHz AM (MW) 530kHz~1710kHz

Power amplifier section

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.

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. 30 seconds later after power on, adjust VR301 for L-ch, or VR302 for R-ch so that the DC voltmeter value has 2.0mV.

RX-7520VBK

* 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.

TP302 (Rch)

VR302 (Rch)

VR301 (Lch)

TP301 (Lch)

Heat sink

1-9

RX-7520VBK

Description of major ICs

AK4527BVQP (IC601) : A/D,D/A converter

1.Pin layout

2. Pin function (1/2) 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

4443424140393837363534

1 2 3 4 5 6 7 8 9 10 11

1213141516171819202122

I/O

I

SDTO Source Select Pin (Note 1)

T op Vie w

Function

33 32 31 30 29 28 27 26 25 24 23

"L" : Internal ADC output, "H" : DAUX input

I

Control Mode Select Pin "L" : 3-wire Serial, "H" : I

-

Soft Mute Pin (Note 1), Connect to GND

2C Bus

When this pin goes to "H", soft mute cycle is initialized. When returning to "L", the output mute releases.

I

Audio Serial Data Clock Pin

I/O

Input Channel Clock Pin

I

DAC1 Audio Serial Data Input Pin

I

DAC2 Audio Serial Data Input Pin

I

DAC3 Audio Serial Data Input Pin

O

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

I

Digital Power Supply Pin, 4.5V~5.5V

-

De-emphasis Pin, 0V

I

Power-Down & Reset Pin When "L", the AK4527B is powered-do wn and the control registers are reset to def ault state. If the state of P/S or CAD0-1 changes, then the AK4527B m ust be reset b y PDN.

-

Test Pin, Connect to GND This pin should be connected to DVSS.

1-10

RX-7520VBK

Pin function (2/2)

Symbol

No.

ICKS

19

ADIF

20

CAD1

21

CAD0

22

LOUT3

23

ROUT3

24

LOUT2

25

ROUT2

26

LOUT1

27

ROUT1

28

LIN-

29

LIN+

30

RIN-

31

RIN+

32

VREFL

33

OVF

VCOM

34

VREFH

35

AVDD

36

AVSS

37

XTI

38

XTO

39

P1S

40

CS

41

CSN

DIF1

42

SCL/CCLK

LOOP0

43

SAD/CDTI

CDTD

44

I/O

Connect to GND

-

Function

No internal bonding. Analog Input Format Select Pin, Digital Power Supply

"H" : Full-differential input, "L" : Single-ended input

Chip Address 1 Pin,

Chip Address 0 Pin,

DAC3 Lch Analog Output Pin

O

DAC3 Rch Analog Output Pin

O

DAC2 Lch Analog Output Pin

O

DAC2 Rch Analog Output Pin

O

DAC1 Lch Analog Output Pin

O

DAC1 Rch Analog Output Pin

O

Lch Analog Negative Input Pin

I

Lch Analog Positive Input Pin

I

Rch Analog Negative Input Pin

I

Rch Analog Positive Input Pin

I

Zero Input Detect 2 Pin (Note 2), Non

-

Connect to GND Connect to GND

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)

O

This pin goes to "H" if the analog input of Lch or Rch is overflows. Common V oltage Output Pin,A VDD/2

O

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

I

Parallel / Serial Select Pin

"L" : Serial control mode, "H" : Parallel control mode

Audio Data Interface Format 0 Pin in parallel mode

I

Chip select pin in 3-wire serial control mode

I

This pin should be connected to DVDD at I2C bus control mode Audio Data Interface Format 1 Pin in parallel mode

I

Control Data Clock Pin in serial control mode

I

I2C = "L" : CCLK(3-wire Serial), I2C = "H" : SCL(I2CBus) Loopback Mode 0 Pin in parallel control mode

I

Enables digital loop-back from ADC to 3 DACs. Control Data Input Pin in serial control mode

I/O

I2C = "L" : CDTI(3-wire Serial), I2C = "H" : SDA(I2CBus) Loopback Mode 1 Pin (Note 1)

I

Enable all 3 DAC channels to be input from SDTII.

AK4527

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.

1-11

RX-7520VBK

M62446FP (IC428) : 6ch master volume

1.Block Diagram

OUT4 OUT3 OUT2 OUT1

AVDD

SWIN

GNDS

SRin

SLin

GNDC

Cin

GNDR

Rin

GNDL

1 2 3 4 5 6 7 8

9 10 11 12 13 14

OUTPUT PORT

volume

MCU I/F

42 41 40 39 38 37 36 35 34 33 32 31 30 29

DVDD CLK DA TA LATCH DGND AGND SWout SRout SLout Cout Rout Lout AVSS CL1

Lin

BYPASSR

BYPASSL

LTRE LBASS3 LBASS2 LBASS1

15 16 17 18 19 20 21

tone

volume

tone

28 27 26 25 24 23 22

CL2 CR1 CR2 RTRE RBASS3 RBASS2 RBASS1

1-12

RX-7520VBK

2.Pin Function Pin No.

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

Symbol I/O

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

M62446FP

Function

O O O O

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

1-13

RX-7520VBK

MN101C35DJW (IC701) : System controller

1. Pin layout 100 76

1

75

2. Pin function (1/2) Pin No.

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

VOL.JOG IN_1 VOL.JOG IN_2

DATA (PLL) CLK (PLL) DE (PLL)

VIDEO S/C DVD VIDEO S/C VCR

VIDEO S/C DBS

DATA (RDS)

PROTECTOR IN

STEREO IN

DAVN (RDS)

COMMAND (DSP)

STATUS (DSP)

Symbol

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+

RESET

CLK (RDS)

DCS IN

DCS OUT

VCR IN

VCR OUT

RM IN

TUNED IN

SELF DET

25

I/O

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

51

26 50

Function

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 Connecting the crystal oscillator for system clock Connect to Connect to Non connect Connect to Connect to 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 A VLINK VCR IN A VLINK 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)

GND GND

(8MHz) (8MHz)

1-14

RX-7520VBK

Pin function (2/2)

Pin No.

41 42 43 44 45 46 47 48

49 ~ 64

GRID16~GRID1

65 ~ 80

81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99

100

Symbol

CLK DSP

READY RESET

RY S

RY C RY L/R1 RY L/R2

RY HP

SEG1~SEG16

NC NC NC NC NC NC

NC POWER S MUTE

SW MUTE

TU MUTE

STB LED

SURROUND

DATA

CLK STB

LATCH

DA TA

CLK

VPP

I/O

O O O O O O O O O O

-

O O O O O O O O O O O

-

MN101C35DJW

Function

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

1-15

RX-7520VBK

UPD784215AGC167 (IC671) : Dital signal controller

1.Pin layout ~

100 76

2.Pin function (1/2) Pin No.

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

AUTODAT A

CHANNEL

MIDIO OUT

Symbol

VDD

X2 X1

VSS

XT2 XT1

RESET

LOCK

DIGITAL0

FORMAT

ERR

REST IN

AVDD

AVREF0

AVSS

AV REF1

RX

TX

DSPCOM

DSPSTS DSPCLK DSPRDY

MIDIO IN

MICK MICS

1

~

25

~

26 50

I/O

-

Non connect

-

Power supply terminal

O

Connecting the crystal oscillator for system main clock

I

Connecting the crystal oscillator for system main clock

-

Connect to GND

O

Connecting the crystal oscillator for system sub clock

I

Connecting the crystal oscillator for system sub clock

I

System reset signal input

I