Kenwood RXD-790, RXDV-860, RXDV-890 Service manual

MINI HiFi COMPONENT SYSTEM

3

¡

7

2

1

O.T.E.

DUBBINGREC/ARM

DOLBY NRREV. MODE

A/B

0

PUSH
OPEN

0

PUSH
OPEN

0

6

¢

7

4

DISC
SKIP

DISC SELECTOR

TIME DISP.

OPEN/CLOSE

DISC

1

DISC2DISC

3

D

O

W

N

U

P

C

L

A

S

S

I

C

E

Q

.

O

F

F

EX.BASS

STEREO

SRS 3D

PRO LOGIC

DOLBY

3 STEREO

MODE

INPUT

DISPLAY BEST HITS

DEMO

AUTO POWER

SAVE

MIC MIX.

MIN. MAX.

MIC1 MIC2

PHONES

ON/STANDBY

AUTO ENTERBAND

POPROCK M/R

RESET

∞

MINI HiFi COMPONENT SYSTEM

MULTI CONTROL

/

VOLUME

TUNING

RXD-790/V860/V890

SERVICE MANUAL

(XD-790/V860/V890)

© 1997-9/B51-5357-00 (K/K) 1586

Knob*
(K29-)

Knob
(K29-6759-12)

Front glass
(B10-2282-12)

Cassette lid
(A53-2019-12)

Knob
(K29-6866-02)

Lighting board
(B19-1563-13)

Front glass
(B10-2391-02)

Panel
(A60-1245-11)

Knob
(K29-6864-03)

Knob
(K29-6863-03)

Knob
(K29-6861-04)

Phone jack
(E11-0280-05)

Knob
(K29-6832-13)

Front glass
(B10-2283-12)

Cassette lid
(A53-2020-12)

Knob
(K29-6832-13)

Knob
(K29-6865-02)

Knob
(K29-6865-02)

In compliance with Federal Regulations, following are reproduc­tions of labels on, or inside the product relating to laser product
safety.

Illustration is RXD-790.

* Refer to parts list on page 62.

KENWOOD-Corp. certifies this equipment conforms to DHHS Reg­ulations No. 21 CFR 1040. 10, Chapter 1, Subchapter J.

DANGER : Laser radiation when open and interlock defeated.
AVOID DIRECT EXPOSURE TO BEAM.

Knob
(K29-6832-13)

RXD-790/V860/V890

REMOTE CONTROL UNIT

N.B.

SLEEP

INPUT

DISC SKIP

O.T.E.

REPEATRANDOMEDITP. MODE

BAND

P. CALL

CD

TUNING

PTY

TAPEA/B

TA/NEWS

/INFO.

RDS

DISPLAY

EX.BASSSRS 3D

AUTO

VOLUME

EQ.

PTY

SEARCH

1 2 3

4 5 6

7 8 9

0 +10

MUTE

CONTENTS / ACCESSORIES

Contents

CONTENTS / ACCESSORIES .................................. 2

EXTERNAL VIEW.......................................................3

DISASSEMBLY FOR REPAIR....................................4

BLOCK DIAGRAM......................................................5

CIRCUIT DESCRIPTION ...........................................6

ADJUSTMENT..........................................................13

Accessories

Please confirm that the following accessories are present.

FM indoor antenna ............(1)

(T90-0801-05)

Speaker cords ................... (2)

(E30-5120-08)

Remote control unit ..........(1)

(A70-1160-05) : RXD-790..........RC-790

(A70-1161-05) : RXD-V860........RC-V860

(A70-1162-05) : RXD-V890........RC-V890

Loop antenna ....................(1) (T90-0820-05)

AC plug adapter................. (1)

(E03-0115-05)

Speaker stabilizer..............(8)

(G11-2345-04)

WIRING DIAGRAM...................................................17

PC BOARD ............................................................. 19

SCHEMATIC DIAGRAM.......................................... 31

EXPLODED VIEW ................................................... 59

PARTS LIST..............................................................62

SPECIFICATIONS....................................................75

AM loop antenna stand .....(1)

(J19-3645-05)

Batteries (R6/AA) ..............(2)

Battery cover (A09-0380-08)

Remocon configuration System configuration

PART NAME MODEL NAME

A70-1160-05 RXD-790
A70-1161-05 RXD-V860
A70-1162-05 RXD-V890

SYSTEM MAIN UNIT SPEAKER SPEAKER

XD-790 RXD-790 LS-N850 CRS-N850
XD-V860 RXD-V860 LS-N850 –
XD-V890 RXD-V890 LS-N850 CRS-N850

2

ANTENNA

AM

FM

300Ω

FM

75Ω

GND

R L

AUX

INPUT

R L

AUX

OUTPUT

SUPER
WOOFER
PRE OUT

FRONT

SPEAKERS

(6-16Ω)

SURROUND

SPEAKERS

(8-16Ω)

CENTER

SPEAKER

(8-16Ω)

+

-

AC220­240V

~

AC110­120V

~

R L

+

- -

+

R L

+

- -

+

Metallic cabinet
(A01-3532-01)

RXD-790/V860/V890

EXTERNAL VIEW

Lock terminal board
(E70-0057-05)

Lock terminal board
(E70-0054-05)

Lock terminal board *
(E70-0057-05)

Lock terminal board
(E20-0476-05)

Phono jack
(E63-1001-05)

Phono jack
(E63-0200-05)

Power cord bushing
(J42-0083-05)

AC power cord *
(E30-)

Slide switch
(S62-0001-05)

Illustration is RXD-790.

* Refer to parts list on page 62.

3

RXD-790/V860/V890

1

1

1

A

2

2

2

2

2

x2

x4

x3

1

2

2

2

2

2

x2

4

5

3

x2

3

3

DISASSEMBLY FOR REPAIR

★ Remove main PCB's, then connect between

PCB GND and chassis with alligator clip.

1. How to remove the main PCB.

(1) Remove the 4 screws 1.
(2) Remove the 9 screws 2.
(3) Lay the rear panel with left side downward on the

small box .

2. How to remove the front panel.

(1) Remove the 3 screws 1.
(2) Remove the 5 screws 2.
★ Remove the deck mechanism only with the fixed

frame on the panel.

A

3. How to remove CD mechanism
(After remove the front panel)

(3) Remove the 5 screws 3, then remove CD mecha-

nism(4) with the laid set.

(4) Assemble the front panel then check (+) position.

★ Connect between video out terminal GND and unit

chassis with alligator clip.

4

(X08)

(X09)

RXD-790/V860/V890

(X32)

(X09)

(X14)

T25-0050

(CDM-27)

MECHA. A,B

(X28)

(X05-466) (K,M,X)
(X05-475) (V)

SUR.

20V/8C ch

S ch 20V/8

(X05) (X08)

AUDIO OUT

OTHER CH

24.5V/6

17.2V/6FRONT

2ch

5V

9V

RF

D.P.S.S

HIGH SPEED
REC SIGNAL

XLON

MDP

SPOB

L,R

LED A,B

SOL-

MOTOR-

MOTOR B

MOTOR A

P.H A,B

VR5,6

A PB

B R/P

IC DATA1

E STB

IC DATA

IC CLK

RM:ON/OFF

P/R

NR:ON/OFF

BIAS:ON/OFF

B:120/70

A:120/70

A/B

BIAS SW

580mV

0dBS

PB OUT

REC IN

PASS

DCL

REC

PB

VR3,4

REC OUT

BIAS TRAP

B PB AMP

LEVEL
VR7,8

A
PB

IC2
A PB AMP

-22dBS
60mV

B ERASE

SRC

OFF

ON

TAPE

TUNER

CD

AUX

AM:180mV/3.3k

FM:600mV/3.3k

TUNER OUTPUT

IC4
BA3126N

70u

120u

B

A

B
PB
LEVEL
VR1,2

IC3

Ω

Ω

Ω

Ω
Ω
Ω
Ω

RXD-790/V890

PRE OUT

RXD-790/V890

RXD-790/V890

RXD-V860/V890

Rch

SEL

/75

1Vp-p

2V/1k

C

S

S

IC10

IC7

SUR. 2ch

200mV/1.1k

AUX OUT

AUX OUT

MUTEATT

ATT MUTE

PAL/NTSC

EHPASIS

MECHA.A,B

MUTEATT

IC3(1/2)

IC6(1/2)

IC6(2/2)IC3(2/2)

OUT

VIDEO

IC5

IC4

IC8

(AC10V)

Q13,14

D12

AVR

(W02)

CD

VIDEO

IC7

P/C

EXPANDER
SERE PARA.

IC9

DAC
PCM

IC14

IC10

u-COM

VIDEO-CD

IC5

IC2

IC1

DOLBY

LOGIC

PRO

E-VOL

Q1Q9

Q2Q10

-

+

CENTER SP

Q1,2Q3,4

IC3

EXPANDER

AVR

Q61

AVR

Q60,63Q56

AVRAVR

MUTE

Q7-10

Q10,11

IC1 HA12209F

MS

IC2IC1

MAIN
u-COM

A1 ED1

SENSOR

REMOTE

FL DISPLAY

SPEANA

POWER SUPPLY

FINAL

TR-12V

D28D25,26D20

-30V12V5.6V

IC9

AC

AMP

MAIN

Q5-16

SP.OUTPUT

WOOFER

SUPER

PHONES

SURROUND
SP.

+

+

-

-

R

L

SP.

MAIN

R

L

+

-

-

+

IC5

N.B

GE.

CANCEL

VOICE

VOL.

ELECTRIC

IC2-4

SRS

5V

u-COM

MOTOR
12V

DSP

5.6V

SW1-SW5

P/C

IC6

CONTROL

DSP POWER

DRIVER MUTE

RESET

IC2

CXD2500BQ

DSP/DAC

IC1

RF AMP/SERVO
CXA1782BQ

LA6537

IC9

LD SW

CONTROL

NJU3713D

S/P

ROTARY MOTOR SPEED CONTROL

L.M

DRIVER

LOADING

ROTARY
DRIVER

R.M

TRAVERSE UNIT

D40-1500

START

LIMIT SW

FOCUS

TRACKING

CONTROL

DRIVER GAIN

IC3

4ch BTL DRIVER

D.M

DRIVER

DISC MOTOR

DRIVER

FEED MOTOR

F.M

COIL

DRIVER

TRACKING COIL

COIL

FOCUS COIL
DRIVER

LD
SW

Q5

LD

F

E

C

B

A

IC5
BA10393

Q3,4

Q1,2

IC6

NJU3714D

MS MAIN

+5V

OUT

L1

MPX

L.P.F.

CHANNEL

OTHER

DOLBY

Q5

CONTROL

BIAS

BEAT CANCEL

Q7,8

OSC

BIAS

AUX IN

AUX IN
200mV/47k

MIC1,2

1.6mV/2.2k

MIC

INPUT
SEL.

IC1

VR1

IC8

IC7

MIC
ECHO

MIXING

IC6
(2/2)

MIC AMP

IC6
(1/2)

BLOCK

TUNER

RXD-790 (X32) : Refer on page5 (X32) of RXD-500/700 servi manual (B51-5300-05)
RXD-V860 (X092) : Refer on page5 (X09) of RXD-500/700 servi manual (B51-5300-05)

(X08) : Except RXD-V860

Ω
Ω

Ω

Ω

RXD-790/V860/V890

BLOCK DIAGRAM

5

RXD-790/V860/V890

CIRCUIT DESCRIPTION

1. Initialization

1-1 Setting of initial conditions

While pressing the [ENTER] key, plug the AC cord into the AC power outlet.

1-2 Initializing operation

• A microcomputer is initialized for start when the AC power is turned on while pressing the [ENTER] key. At that time, CD

mechanism are also initialized.

• During the initial operation, the display shows “INITIALIZE” and after that the clock blinks up on display.

1-3 Initial items and back up data

ITEMS

★ POWER OFF
★ VOLUME 15
★ BALANCE CENTER

MUTING OFF

★ EQ OFF
★ EQ. MANU FLAT

AMP ★ EX. BASS ON

★ SRS 3D OFF
★ INPUT SEL TUNER
★ AUX INPUT 0 (-6dB)
★ REC LEVEL -17

N. B. OFF
ECHO NONE OFF

★ 3D LEVEL 0
★ REF/MANU REF
★ DEMO ON
★ D-SURROUND OFF NONE
★ D-3STEREO OFF NONE
★ CENTER NORMAL NONE
★ CEN LEVEL 0 (-10dB) NONE
★ SUR LEVEL 0 (-10dB) NONE

★ back up data

VIDEO-CD AUTO PBC NONE ON

ITEMS

★ BAND FM
★ LAST f LIMIT

TUNER ★ LAST Pch — —

★ AUTO/MONO AUTO
★ Pch TEST f
★ CLOCK AM 12 : 00
★ PROG ON AM 12 : 00

CLOCK ★ PROG OFF AM 12 : 00

TIMER ★ PRO MODE PLAY

★ SOURCE TUNER
★ Pch 1
★ EXE OFF
★ OTT OFF

SLEEP OFF

★ DIRECTION FORWARD
★ RVS MODE p

DECK ★ DOLBY NR OFF

A/B B
ACTIVE MODE STOP
PLAY MODE TRACK
REPEAT OFF

CD RANDOM OFF

PLAY MODE STOP
TIME SINGLE

★ A/NTSC/PAL NONE AUTO

DIGEST NONE OFF
MEM STOP NONE OFF

1-4 Mechanism initialization

1-4-1 CD mechanism

• Disc unclamps (traverse down)

• Rotary tray rotates (1/3 rotation)

• If a mechanism error occurs, “C” is indicated on the display.

1-4-2 DECK mechanism

• When initial condition becomes NG for the third time, decide the error.

The error condition is displayed as "X" on the display.

1-4-3 Error display

C ERR or X ERR

6

RXD-790/V860/V890

CIRCUIT DESCRIPTION

2. KEY MATRIX

KR0 KR1 KR2 KR3

41 42 43 44

KEY1 97 PIN B PACK B PLAY STEREO F REC

KEY2 96 PIN A PACK A PLAY SD R REC
KEY3 95 PIN POWER A/B/BEATC INPUT POP
KEY4 94 PIN EQ. OFF MANU/REF CLASSIC ROCK
KEY5 93 PIN DSW3 DSW2 DSW1 DSW0
KEY6 92 PIN TEST (RDS) DSW6 DSW5 DSW4
KEY7 90 PIN ¢ (CD) DISC SKIP 6 (CD) OPEN/CLOSW
KEY8 89 PIN TIME DISP 4 (CD) 7 (CD) DISC3
KEY9 88 PIN 7 (DECK) £ (DECK) ¡ (DECK) ™ (DECK)
KEY10 87 PIN OTE (DECK) DUBBING REC/ARM 1 (DECK)
KEY11 86 PIN DISC1 REV MODE DOLBY NR DISC2
KEY12 85 PIN TUNING UP BAND AUTO BEST/ECHO/A
KEY13 84 PIN SRS 3D 3 STEREO ENTER MODE/OTT
KEY14 83 PIN RESET EX.BASS/PRG DISPLAY STEREO/BEST
KEY15 82 PIN TUNING DOWN PRO LOGIC

No. of : Port No. of (X14)IC1 u-COM.

3. TUNER preset frequency

Refer to RXD-500/700 service manual (B51-5300-00), if need TUNER preset frequency K1 and K2.

4. Destination list of tuner

Desti- DSW Receiving frequency Channel PORT

nation 3(D23) 2(D22) 1(D21) 0(D20)

K1 0 0 0 0 FM 87.5MHz~108.0MHz 100kHz +10.7MHz 25kHz 0

K2 0 0 0 1 FM 87.5MHz~108.0MHz 100kHz +10.7MHz 25kHz 1

E1 0 0 1 1 FM 87.5MHz~108.0MHz 50kHz +10.7MHz 25kHz 0

DIODE SW : 0 = Without diode (When static, input low)

I = With diode (When static, input high)

Band

AM 530kHz~1700kHz 10kHz +450kHz 10kHz 0

AM 530kHz~1610kHz 10kHz +450kHz 10kHz 0

AM 531kHz~1602kHz 9kHz +450kHz 9kHz 0

range space

IF RF

47

5. Test mode

5-1 Test mode of the receiver

5-1-1 Setting of the test mode

While pressing the [INPUT] key or [Band] key, plug the
AC power cord in AC outlet.

5-1-2 Canceling of the test mode

Unplug the AC power cord.

5-1-3 Condition in test mode

POWER • • • • • • ON
SELECTOR • • • AUX (in case of [INPUT] key)

TUNER (in case of [BAND] key)

FL, LED • • • • • All the fluorescent display indicators

and LEDs light. (The all illuminated
state is cleared by pressing any main

unit key or remocon key.
EX. BASS • • • • • OFF
REC LEVEL • • • All position 0dB (REC 80)

5-1-4 Sub clock osculation diagnosis

Sub clock oscillation be diagnosed OK and NG before

input test mode.

ERR1 : OSC non active
ERR2 : Frequency NG.

5-1-5 All RAM clear

While pressing [3STEREO] key or [HIT MASTER] key,
plug the AC power cord into AC power output, the all
RAM cleared.

5-1-6 Basic operation in test mode.

(1) The muting during mode selection is not controlled in

the test mode.
(2) The REC out level is fixed to 0dB (MAX).
(3) The test mode is cancelled when the AC power is

turned OFF.
(4) The operation of the keys in the test mode, as follows.

5-1-7 The operation of the keys in the test mode.

(1) DISP/DEMO key

When this key is pressed in the test mode, all the flu-

orescent light off and normal display are indicated

cyclically.
(2) DISC 1~3 keys

With the selector on AUX, when the DISC 1~3 keys

are operated, the 3D level settings can be made as

follows.

1 DISC 1 • • • • • • 3D ON level -10 (Min)
2 DISC 2 • • • • • • 3D ON level 0 (Center)
3 DISC 3 • • • • • • 3D ON level +10 (Max)

7

RXD-790/V860/V890

PLL
LC72131

EXPANDER IC
NJU3711

EXPANDER IC
NJU3714D

CD

MECHANISM
UNIT
CDM-27

DECK
MECHANISM
GT-E5000

SYSTEM IC
HA12209F

PARALLEL-SERIAL
TC74HC166AP

SELECTOR
NJU7313

SYSTEM IC
LC75393E

KEY
MATRIX
13SCAN 4RETURN

SPEANA
BA3834S

STB

RECEIVER SECTION IC_CLK/DATA

CE

PH

GRID (10)

(X14) IC1

(X14) IC2

(X32) IC2

(X32) IC6

(X28) IC1

(X28)
IC6

(X32)
IC5

(X14) ED1

(X09) IC1

(X09) IC5

(X05) IC2

SEGMENT (42)

POWER
MUTE

ST. CLEAR

M38199MF-069FP

M38198MCA-807FP

FIP10HMW6R

CD DSP
CXD2509Q

FL

MAIN

u-COM

CD

DECK

EXPANDER

SERI PARA

EXPANDER

SERI PARA

PRO LOGIC

DOLBY

C,S VOL.

SEL.

ST P.LOG.

VIDEO CD

µ-COM

VIDEO CD

(W02-)

CD

MECHANISM

(CDM-27)

DAC

4ch BTL

RF SERVO

DSP

(X32) IC2

(X32) IC1

(X32) IC2

4ch BTL

(X32) IC3

RF SERVO

(X32) IC1

(X32) IC14

(X32) IC10

(X32) IC6,7,9,

CD/VIDEO CD

(X08) IC7

(X08) IC4

(X08) IC2

(X08) IC1

DOLBY PROLOGIC

(X14) IC5

TAPE

KEY

INDICATION

OF VOL.

VALUE

Press mode key in the AUX mode

1 time

2 times

BALANCE

INPUT LEVEL

RVS MODE1L

-13

DOLBY NR

44 (MID)

CENTER

-4

A/B

86 (MAX)R+2

DUBBING

-8

O.T.E

-3

CIRCUIT DESCRIPTION

(3) CD STOP key

With the selector on TUNER, when the [CD STOP]
key operated, the preset memory can be changed
as 10 steps.

î10

– –

î 20

– –

î 30

– –

î 40

– –

î 00 (

– –

)ì

(6) CD OPEN/CLOSE keys

With the selector on TUNER, the channel space
(emphasis) settings can be mad cyclically by press­ing the OPEN/CLOSE keys with E1 and K2 version.

(7) Other keys

During the test mode, it can be operated in a special

(4) AUTO, TUNING UP/DOWN

With the selector on something other than TUNER,
the E.Q (Flat, Min, Max) settings can be made by

manner that is different from an ordinary operation
by using the keys on the main body, specifically as

shown in the following table.
pressing the [AUTO] key and the tuning [UP]
[DOWN] keys.

[AUTO] key E.Q Flat
TUNING [DOWN] key E.Q Min
TUNING [UP] key E.Q Max

(5) CD SKIP UP/DOWN keys

With the selector on TUNER, the P. CALL is operat­ed by pressing the skip UP/DOWN keys.

SKIP [UP] key P.CALL up
SKIP [DOWN] key P. CALL down

RXD-790/V890

OPERATION KEY DISCRIPTION

CD ¢ CENTER LEVEL UP

CD 4 CENTER LEVEL DOWN
TAPE ¡ REAR LEVEL UP
TAPE 1 REAR LEVEL DOWN

6. Main microprocessor M38198MCA-807FP (X14: IC1) : RXD-790
M38199MF-069FP (X14: IC1) : RXD-V860/V890

6-1 Microprocessor periphery block diagram

8

CD O
CD/VIDEO CD O O
DOLBY PROLOGIC O O

RXD-790 RXD-V860 RXD-V890

RXD-790/V860/V890

CIRCUIT DESCRIPTION

6-2 Pin description

Pin No. I/O Name Description

1 I BP-IN Speana input (A/D convertor input)
2 I CW Rotary encoder input B
3 I CCW Rotary encoder input A
4 I A-PH A photo sensor input
5 I B-PH B photo sensor input
6 I HEAD PHONE Head phone sw input H : ON L : OFF
7 O DOLBY ST Surround IC(LV1016/LA2786) strobe
8 I/O SEL ST Selector IC(NJU7313) strobe

9 O IC-DATA Selector/PLL/E. Volume/Expander IC (data)
10 O IC-CLK Selector/PLL/E. Volume/Expander IC (Clock)
11 O E ST Expander IC (NJU3711/NJU3713/NJU3714) strobe
12 O SANYO CE System IC(LC75393(/PLL(LC72131)/E. vol(LC7536) CE
13 I PLL DO PLL data input
14 O DAC ST DAC(PCM1717E) strobe
15 O C BUSY VCD busy output
16 O VCD CLOCK VCD clock
17 O C DATA VCD data output
18 I M DATA VCD data input
19 O CD-CLK CD DSP clock (CXD2509Q)
20 O SQCK Sub cord clock(CXA 1782BQ, CXD2509Q)
21 O CD-DATA CD IC DATA
22 I SUBQ Sub code data
23 O CD-XLAT CD latch output (CXA1782BQ, CXD2509Q)
24 I SENSE CD sense input (CXA1782BQ, CXD2509Q)
25 O PS-LOAD Parallel serial IC load H : Shift L : Load
26 I PS-SIN Parallel serial IC data
27 O E. VOL ATT E. Vol attenuation H : ON L : OFF
28 O IC-CLR Expander IC reset H : Normal L : Reset
29 I CE Power failure input H : AC ON L : AC OFF
30 I SCOR Sub code synchronism signal (CXD2509Q)
31 O A MUTE Mute control H : OFF L : ON
32 I REM Remote control input
33 I PROTECT Protection input H : Protect L : Normal
34 I M BUSY VCD board u-COM busy input
35 I RESET Reset H : Normal L : Reset
36 I Xcin
37 O Xcout
38 I Xin
39 O Xout
40 Vss (GND)

41~44 I KR0~KR3 Key return 0~3 H : ON
45~54 O 1G~10G FL grid 1G~10G
55~73 O SEG41~SEG23 FL segment SEG41~SEG23
74~76 O SEG22/BP OUT3~SEG20/BP OUT1 FL segment SEG22~SEG20/band pass control 3~1
77~81 O SEG19~SEG15 FL segment SEG19~SEG15

82 ~90 O SEG14 / KEY15/~SEG6/KEY7 FL segment SEG14~SEG6/Key scan KEY15~KEY7

91 Vcc u-com power supply

92 ~ 97 O SEG5/KEY6/~SEG0/KEY1 FL segment SEG5~SEG0/Key scan KEY6~KEY1

98 Vee Pull down power supply
99 AVss A/D GND

100 Vref A/D reference voltage

Timer clock input/output(32.768kHz)

Main clock input/output(8.38MHz)

9

RXD-790/V860/V890

EMPHASICE
ECHO A
ECHO B
POWER
SRS LED
3ST LED
PRO LED
H.TAP
DC OFF
DOLBY
SP RELAY
CS RELAY

A SOL
A CPM
B SOL
B CPM
BEAT CANCEL
R/P
RMUTE
A/B
BIAS
NR
D-R/P
LMUTE

LDC
PMON
CD VMUTE
NTSC/PAL
BRKM
LMF
RMR
LMR
RMF
CD MUTE
AUTO/MANUAL
CD RST

UNLOAD

LOAD

NC

MUTE

+3.3C

UP SW

DN SW

LMT SW

EMPHA
DPSS
NC
NC
PAL/NT
PS SW
ST SW
NC

SIN LOAD CLK LOAD CLK

AM
LW/SW
MONO
FM
ATT
IF ON

P1
P2
P3
P4
P5
P6
P7
P8

P9
P10
P11
P12

P1
P2
P3
P4
P5
P6
P7
P8

P9
P10
P11
P12

P1

P2

P3

P4

P5

P6

P7

P8

P9
P10
P11
P12

A
B
C
D
E
F
G
H

A
B
C
D
E

F
G
H

B01
B02
B03
B04

101

102

(X05) IC2

(X09) IC5

(X08) IC1,2

(X08) IC4

(X09) IC1

(X32) IC14

SI

(X32) IC6

(X32) IC7

QH

(X32) IC5
(X32) IC9

(X28) IC6

(X14) IC5

EX ST

SEL ST
DOLBY ST
DAC ST
SANYOU CE

RXD-V860/V890

RXD-790
/V890

IC CLK

IC DATA

CLR

SYSTEM IC

LC75393E

DOLBY IC

LV1016
LA2786

C.S VOL IC

LC7536

INPUT SEL IC

NJU7536

DAC IC

PCM1717E

PARALLEL

SERIAL

PARALLEL

SERIAL

TC74HC166

TC74HC166

NJU3713

NJU3714

NJU3714

PLL IC

LC72131

DO

CIRCUIT DESCRIPTION

7. Expander IC

7-1 Expander port connection

10

RXD-790/V860/V890

CIRCUIT DESCRIPTION

7-2 Expander IC port description

7-2-1 Display section NJU7314(X14 : IC5)

Pin No. Name I/O Description

1 SRS_LED O SRS LED H=ON L=OFF
2 3ST_LED O 3STEREO LED H=ON L=OFF
3 PRO_LED O PRO LOGIC LED H=ON L=OFF
4 H.TAP O HIGH TAP control H=ON L=OFF
5 VSS GND
6 DC_OFF O CD DSP power supply H=OFF L=ON
7 DOLBY O DOLBY ON/OFF (LOW TAP) H=ON L=OFF
8 SP RELAY O SP relay control H=ON L=OFF

9 CS RELAY O CS SP relay control H=ON L=OFF
10 SO O Shift resister data output
11 DATA I Data input
12 CLK I Lock
13 STB I Strobe
14 CLR I Data clear
15 VSS GND
16 EMPHASIS O FM emphasis changeover H=100k L=50kHz
17 ECHO A O ECHO Control H=ON L=OFF
18 ECHO B O ECHO Control H=ON L=OFF
19 POWER O Power supply control H=ON L=OFF
20 VDD Power supply (5V)

7-2-2 DECK section NJU7314(X28:IC6)

Pin No. Name I/O Description

1 BEAT-C O Beat cancel H=ON L=OFF

2 R/P O REC/PLAY changeover H=REC L=PLAY

3 RMUTE O REC MUTE H=OFF L=ON

4 A/B O A/B play changeover H=B L=A

5 VSS GND

6 BIAS O BIAS changeover H=ON L=OFF

7 NR O Noise redaction changeover (DOLBY) H=ON L=OFF

8 D-R/P O Dolby REC/PLAY changeover H=REC L=PLAY

9 LMUTE O LINE MUTE H=OFF L=ON
10 SO O Shift resister data output
11 DATA I Data input
12 CLK I Clock
13 STB I Strobe
14 CLR I Data clear
15 VSS GND
16 A-SOL O A deck solenoid control H=ON L=OFF
17 A-CPM O A deck motor control H=ON L=OFF
18 B-SOL O B deck solenoid control H=ON L=OFF
19 B-CPM O B deck motor control H=ON L=OFF
20 VDD Power supply(5V)

11

RXD-790/V860/V890

CIRCUIT DESCRIPTION

7-2-3 CD section (RXD-V860/V890) NJU7313D (X32 : IC9)

Pin No. Name I/O Description

1 BRKM O Rotary motor control brake H=BRAKE L=NORMAL
2 LMF O Loading motor control(CW) H=ON L=OFF
3 RMR O Rotary motor control(CCW) H=ON L=OFF
4 LMR O Loading motor control (CCW) H=ON L=OFF
5 VSS GND
6 RMF O Rotary motor control (CW) H=ON L=OFF
7 CD MUTE O CD analog mute H=OFF L=ON
8 MANU/AUTO O TV changeover control H=MANUAL L=AUTO

9 CD _RST O CS DSP reset control H=NORMAL L=RESET
10 DATA I Data input
11 CLK I Clock
12 STB I Strobe
13 CLR I Data clear
14 LDC O CD LD control H=OFF L=ON
15 PMON O PMON control H=ON L=OFF
16 VMUTE O Visual mute control H=ON L=OFF
17 PAL/NTSC O PAL/NTSC changeover H=PAL L=NTSC
18 VDD Power supply(5V)

7-2-4 CD Section (RXD-V860/V890)

Input expander IC (parallel-serial) TC74HC166(X32 : IC6,7)

• IC 6
Pin No. Name I/O Description

2 UNLOAD I CD unloading sw H=ON L=OFF
3 LDSW I CD loading sw H=OFF L=ON
4 NC I GND

5 MUTE I CD zero mute detect H=MUTE OFF L=MUTE ON
10 +3.3C I VCD power supply detect H=3.3V OFF L=3.3V ON
11 UPSW I CD up sw H=OFF L=ON
12 DNSW I CD down sw H=OFF L=ON
14 LMTSW I CD limit sw H=OFF L=ON

•IC 7
Pin No. Name I/O Description

2 EMPHASIS I VCD emphasis H=EMPHA ON L=OFF
3 DPSS I DECK non music (black) cletect H=MUSIC L=NON MUSIC
4 NC I GND

5 NC I GND
10 PAL/NTSC I VCD board visual mode H=PAL L=NTSC
11 PSSW I CDM-27 MECHA position sw H=OFF L=ON
12 STSW I CDM-27 MECHA stop sw H=OFF L=ON
14 NC I GND

★ CD section (RXD-790) : refer to RXD-500/700 service manual (B51-5300-00) on page11.

12

ANTENNA

AM

FM

300Ω

FM

75Ω

GND

R L

AUX

INPUT

R L

AUX

OUTPUT

SUPER
WOOFER
PRE OUT

FRONT

SPEAKERS

(6-16Ω)

SURROUND

SPEAKERS

(8-16Ω)

CENTER

SPEAKER

(8-16Ω)

+

-

AC220­240V

~

AC110­120V

~

R L

+

- -

+

R L

+

- -

+

(A)

(B)

(C)

(E)

(D)

AG

AG

AG

FM-SG

FM-MPX

POLAR SG

FM-SG

FM-SG

AM-SG

AC voltmeter

Oscilloscope

Distortion meter

Dummy antenna

Fig (a)

NO.

ITEM

INPUT

SETTINGS

OUTPUT

SETTINGS

TUNER

SETTINGS

ALIGNMENT

POINTS

ALIGN FOR

FIG.

1

DISTORTION

(STEREO)

(A)

98 MHz,

60dBµ (ANT INPUT)

1 kHz, ±67.5 kHz DEV

PILOT: ±7.5 kHz DEV

(B)

AUTO

98.0 MHz

IFT (A1)

Minimum

distortion.

(a)

1. Tuner adjustment

RXD-790/V860/V890

ADJUSTMENT

TO X05 CN1

9PIN (Lch)

11PIN (Rch)

10PIN (GND)

13

RXD-790/V860/V890

KEY

DISPLAY

OPERATION

PLAY/PAUSE

6 +AC IN

5 01

SETTING OF THE TEST MODE
CANCEL THE CLAMP
TRAY 1 ROTATION
TRAY OPENS AUTOMATICALLY

STOP 7

5 01

TRAY CLOSE
CANCEL THE CLAMP

PLAY/PAUSE

6

5 05

PLAY MARK

ON 3

TRAY CLOSE/DISC CLAMP
05 MODE

DISC 3

5 03

PAUSE MARK

0N 8

TRAY CLOSE/DISC CLAMP
03 MODE
(TRACKING SERVO OFF)

DISC 1

5 16

DISC 1 STOP
PLAY DISC2 TRACK NO.16

DOWN

(SKIP DOWN)

4

5 32

DISC 2 STOP
PLAY DISC 1 TRACK NO.32

DISC 2

5 – –

CANCEL THE CLAMP
DISC STOPS IN THE DISC 3
POSITION

KEY

DISPLAY

OPERATION

TIME DISP.

+ AC IN

CD 00

SETTING OF THE TEST MODE
CANCEL THE CLAMP
TRAY1/3 ROTATION
TRAY OPENS AUTOMATICALLY

STOP 7

CD 00

TRAY CLOSE
CANCEL THE CLAMP

PLAY/PAUSE

6

CD 03
CD 05

TRAY CLOSE/DISC CLAMP
T-SERVO OFF(03) OR ON(05)

DISC SKIP

TRAY 1/3ROTATION

DISC 2

MECHA OK

CANCEL THE CLAMP
TRAY1/3 ROTATION

DISC 1

CD 01

CANCEL THE TEST MODE

ADJUSTMENT

2. Test mode of CD player

2-1 Mechanism

(1) Setting of the test mode

While pressing the [PLAY/PAUSE] key, plug the AC
power cord in AC outlet.

(2) Canceling of the test mode unplug the AC power

code.

(3)Operation

•

2-2 Main unit (X32)

(1)Setting of the test mode

While pressing the [TIME DISP] key, plug the AC
power cord in AC outlet.

(2)Canceling of the test mode press the [DISC 1] key or

unplug the AC power code.

(3)Operation

•

14

CN2

GND

+

_

L.P.F.

+

+

L.P.F.

VTVM

VTVM

1
2
3
4
5
6
7

3. Adjustment of CD player

RXD-790/V860/V890

ADJUSTMENT

No.

ITEM

INPUT

SETTING

OUTPUT

SETTING

PLAYER

SETTING

ALIGNMENT

POINT

Step 1~4 are in TEST MODE
TEST MODE : While pressing the (TIME DISP.) key, plug the AC power cord into the AC outlet.

1

LASER

POWER

Set the senor sec-

–

tion of the optical

power meter on the

pickup lens.

Press the"PLAY"key

to check that the dis-

play is "03".

–

Connect an oscillo-

2

TRACKING

ERROR

BALANCE

Test disc Type 4

scope as follows.
CH1 : RF (CN2-1)
CH2 : TE (CN2-6)

Press the "PLAY"

key. Confirm the

display is"03".

TE

BALANCE

VR2

GND : VC (CN2-4)

Connect an oscillo-

3

FOCUS
ERROR

BALANCE

Test disc Type 4

scope as follows.

CH1 : RF(CN2-1)

CH2 : FE(CN2-2)

Press the "PLAY"

key. Confirm that
the display is”05”

FE

BALANCE

VR1

GND : VC (CN2-4)

Connect a LPF to

CN2 pin 5-6 to

which connect an

oscilloscope or AC

voltmeters.

Press the "PLAY"

key. Confirm that

the displays”05"

TRACKING

GAIN

VR3

4

TRACKING

GAIN

Test disc Type 4

Apply signal of

1.2kHz, 50mVrms
to CN2 pin5-6.

Note:
Type 4disc :SONY YEDS-18 Test Disc or equivalent.
LPF : Around 47kΩ + 390pF or so.

ALIGN FOR

On the power

from.0.05 to

0.15mw. when the

diffraction grating is

correctly aligned

with the RF level of

0.8Vp-p or more

Symmetry between

upper and lower or

DC=0±25mV

Optimum eye pattern

Two VTVMs should

read the same

value.

FIG.

(a)

(c)

(d)

(b)

(a) Laser Power

0.05~0.15 mW

Pickup

Optical power meter

(c)

CH1
RF signal

¶ RF signal and TE signal in test mode (Focusing servo

ON / Tracking servo OFF). (Disc Type 4)

¶ Adjust TE signal so that the waveform is symmetrical

in relation to VC. VR 2 (TE BALANCE)

15

VC

VC

CH2
TE signal

(b) Tracking Gain Adj.

1.2 kHz
50 mVrms

(d)

¶ RF signal in test mode (PLAY).
¶ Perform the tangential and focusing offset are focused

into one point on the display. The crossing points
above and below the center shall also be looked clear­ly.

RF signal : AC coupled

RXD-790/V860/V890

{

(A) (B)

X28, CN6

R IN

R OUT

L OUT

L IN

GND

1

5

AC voltmeter AG

Oscilloscope

AC voltmeter

Frequency counter

ADJUSTMENT

4. Cassette Deck adjustment

No

Unless otherwise specified, set the respective switches as follows: 0dBs=0.775V

TAPE : NORMAL DOLBY : OFF PLAY OUT : Lch (X28,CN6 4pin), Rch (X28,CN6 1pin)

ø. Cassette mechanism unit (Adjustment of the REC / PLAY head)

<1>

<2>

¿. PC BOARD ADJUSTMENT

<1>

ITEM

Demagnetization

and cleaning

Azimuth of the

REC/PLAY head

TAPE

SPEED(NORMAL)

INPUT

SETTING

–

TCC−153
MTT−114

10kHz, − 10dB

TCC−110
MTT−111

SCC−1727

3kHz

OUTPUT

SETTING

–

(B)

(B)

DECK

SETTING

Power : OFF

Demagnetiza-

tion,cleaning,

PLAY

PLAY

PLAY

ALIGNMENT

POINT

Recording

head, erase

head,capstan

pinch roller

FWD RVS

A DECK

VR 5

B DECK

VR 6

ALIGN FOR

Demagnetize the

REC / PLAY head

with the head eras-

er.Clean the REC /

PLAY head, erase
head,capstan and

pinch roller using a

cotton swab slightly

damped with alcohol.

Adjust the output to

maximum and adjust

the azimuth adjust-

ment screw for the
Lissajours waveform
pattern of the oscillo-

scope to become

close to a 45°

straight line.

Adjust the tape

speed so that 3kHz

is obtained at the

center of the tape.

FIG.

¡. PC BOARD ADJUSTMENT

<1>

<2>

PLAYBACK

LEVEL

BIAS CURRENT

MTT− 130

400Hz

(A)

Adjust the AG

for the output of

the DECK to

become 1kHz

-30dBs.

400Hz/10kHz

(B)

(B)

PLAY

REC

↕

PLAY

A DECK

VR 7 (L)
VR 8 (R)

B DECK

VR 1 (L)
VR 2 (R)

VR 3 (L)

VR 4 (R)

Adjust the playback

output to -2.0dBs

Record 1kHz and

10kHz alternately,
and adjust the bias
current adjustment

potentiometer for the

playback levels to

become the same.

16

(X09- ) (D/5)

PRIMARY UNIT

PRIMARY UNIT
(X09- ) (D/5)

RXD-V890

USED RXD-790/

USED RXD-V860

SECONDARY UNIT

(X09- ) (B/5)

CONSTANT VOLTAGE UNIT

(X09- ) (E/5)

SWITCH UNIT

(X09- ) (D/5)

PRIMARY UNIT

RXD-790/V860/V890

(X09- ) (C/5)

(X32- ) (B/2)

SECONDARY UNIT

SURROUND UNIT
(X08-28XX-XX)

(X28-2880-20)

CASSETTE DECK UNIT

CASSETTE MECHA.
(D40-1510-X5)

NOT USED RXD-V860

USED RXD-V860/RXD-V890

AUDIO UNIT
(X09-4XXX-XX) (A/5)

USED RXD-V860/RXD-V890USED RXD-790

TUNER UNIT
(X05-46XX-XX)

(X14- ) (B/2)

DISPLAY UNIT (DECK, CD)

CD CHANGER

CD UNIT

(D40-1562-X5)

(D40-1542-X5)

(X32-3270-20)

CD UNIT

MECHA. : CDM-27

CD CHANGER

V-CD BOARD

(X32-3XXX-XX) (A/2)

MECHA. : CDM-27

(W02-2618-X5)

DISPLAY UNIT (AMP)
(X14-4XXX-XX) (A/2)

X09-4724-11(H) :

X05-4752-10

X14-4652-10

X32-3532-10

CN7

CN7

J6

FRONT
SPEAKERS

PHONES

MIC 1

J5

J3

J6

SPEAKERS

FRONT

SPEAKERS

SURROUND

E2

S1

SW

WH1

E1

MATRIX

E5

WH2

J4

E4

MIC 2

S2

CN7

POWER
TRANSFORMER

E6

CN4

WH3

E1

CN1

WH1

E3

J2

J1

CN18

E2

WH2

CN3

E1

WH1

(M,I) :

(K,M,I,X,H) :

RXD-V890

RXD-790

(V) :

CN5

X08-2800-20
X08-2800-20

X08-2832-10

WH2

J1

SUPER
WOOFER
(PRE OUT)

AUX INPUT

X09-4720-20
X09-4720-71

X09-4880-20

X09-4720-20
X09-4822-10

X09-4832-10

RXD-V860

RXD-790

RXD-V890

(X) :

(M,I) :

(V) :

(M,I) :

(V) :

(M,I) :

J2

AUX OUTPUT

(M,I) :

(K,H) : X05-4660-11

X05-4660-20

CN2CN1

(M,I) :

(M,I) :

(V) :

(V) :

X05-4660-20

X05-4660-20
X05-4752-10

(X) : X05-4660-71

(K) : X09-4720-11

FM

FM 75 Ω

J1

AM ANT

GND

300

RXD-V890

RXD-V860

RXD-790

CN19

E7

WH7

CN6

E4

WH4

E35-1760-05

CN1

(K) :

(X,H) :

(M,I) :

(V) :

(M,I) :

(V) :

(M,I) :

X14-4490-11
X14-4490-21
X14-4490-71

X14-4490-20

X14-4490-22
X14-4652-11

FL

CN5

CN1

E3

WH3

E1

X32-3440-20

X32-3440-20
X32-3532-10

E1

E8

WH5

E6

E2

WH2

E5

(V) :

(M,I) :

(M,I) :

RXD-V890

RXD-V860

E1

J2

WH1

CN7

VIDEO
OUT

(V) :

CN9

WH1WH1

WH1

CN7

WH8

CN13

RXD-V890

RXD-V860

RXD-790

Ω

V

V

V

V

(H)
AC220V 60Hz

(K) TYPE

V

V

AC120V
60Hz

(V)

V

V

(X)

AC220V 50Hz

AC240V 50Hz

(X,H,V) TYPE

1
2

F5

2

1

+

Lch

-

­Rch

+

+

-

Lch

-

+

Rch

+

Lch

-

­Rch

+

1

ON

OFF

1

1

7

1

7

(M,I) TYPE

50/60Hz

220-240V

AC220-

240V

V

V

1
2

WH8

WH7

AC110-120V/

F4

F5

AC110-

120V

WH6
WH5

F8

12

F1

F2

F3

1

F9

12

11

1

11

6

3

1

F6

6

CENTER

-

+

+

-

+

1 SURROUND Lch

2 SURROUND Rch

19114

91114

1

1

1

13

-

Lch

Rch

1

Lch

Rch

1

15

1

15

11

51

1

15

111

11 1 13

13

13

1

11

1

1

11

1

14

1

12

1

8

1

8

31

30

30

11

1

-CN1

-E1

14

X14-A/2

1

1

X09-A/5

14

1

12

V

V

VV

V

V

VV

V

V

V

V

V

V

V

V

V
V

V

V

V

RXD-790/V860/V890 RXD-790/V860/V890

WIRING DIAGRAM

17

18

A BDFHJCEGI

PC BOARD(Component side view)

1

CASSETTE MECHANISM UNIT
(X28-2880-20)

2

3

TUNER UNIT (X05-4660-11) : KH

(X05-4660-20) : MI
(X05-4660-71) : X
(X05-4752-10) : V

4

5

6

7

19 20

Refer to the schematic diagram for the value of resistors and capacitors.