KENWOOD XD-501 User Manual

3

¡

2

1

PLAY

0

PUSH
OPEN

0

PUSH
OPEN

6

¢

7

7

4

DISC SKIP

DISC

1

DISC

2

REV.MODE DOLBY NR

DISC

3

VOLUME
CONTROL

UP

DOWN

SRS 3D

TIMER

DISPLAY

EX. BASS

MODE

/DEMO

ENTER

AUTO

PHONES

SET

MAXMIN

SOUND

MULTI
CONTROL

ON/STANDBY

INPUT

MIC
VOL.

1± MIC ±2

DUBBING

TUNING

BAND

CD PGM

MINI HiFi COMPONENT SYSTEM

REC

/PLAY

A/B

REC/ARM

0

SRS ( )

MINI HiFi COMPONENT SYSTEM

RXD-501/501E/501W/551/551E/551W/571S/A5/

RXD-701/701E/701W/751/751E/751W/771S/A8

SERVICE MANUAL

(XD-501~A8)**

Phono jack

Phone jack
(E11-0169-05)

(E11-0169-05)
Cassette lid (L)*

(A53-)
Front glass

(B10-2446-13)

Front glass*
(B10-)

Lighting board
(B19-1589-04)

Lighting board
(B19-1586-04)

© 1998-3/B51-5420-00 (K/K) 3661

Panel assy*
(A60-)

Knob*
(K29-)

Phone jack
(E11-0280-05)

Cassette lid (R)*
(A53-)

Front glass
(B10-2447-13)

Lighting board
(B19-1587-03)

**Refer to page 2 if you want to know system configuration.

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

Refer to RXD-500/700 (B51-5300-00), If you require
TUNER preset frequency in detail.

Panel (CD)*
(A29-)

* Refer to parts list on page 58.

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

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

RXD-501/551/571/A5/701/751/771/A8

VOLUME

TAPE

SET

ENTER

A/B

CD

TUNING P.CALL

MUTE

MENU

RC-701R

REMOTE CONTROL UNIT

1 2 304 5 6

+10

7 8 9

DISC SKIP

EX.BASS

SRS 3D

TIME RANDOM REPEAT BAND

EQ ON/OFF

INPUT

RDS DISP. PTY

TA/NEWS

/INFO.

POWER

MULTI CONTROL

VOLUME

TAPE

SET

ENTER

A/B

CD

TUNING P.CALL

MUTE

MENU

RC-701

REMOTE CONTROL UNIT

1 2 304 5 6

+10

7 8 9

DISC SKIP

EX.BASS

SRS 3D

TIME RANDOM REPEAT BAND

EQ ON/OFF

INPUT

POWER

MULTI CONTROL

CONTENTS / ACCESSORIES

Contents

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

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

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

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

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

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

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

Accessories

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

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

SCHEMATIC DIAGRAM............................................27

EXPLODED VIEW .....................................................55

PARTS LIST...............................................................58

SPECIFICATIONS .......................................Back cover

FM Indoor antenna
(T90-0801-05): KPXYMM2
(T90-0836-05): TEQE2

Speaker cords (4)

XD-A8/XD-7....Series

Speaker cords (2)

XD-A5/XD-5....Series

Attached with to
speaker unit

Batteries (R6/AA)

Speaker cushion (8)

AM Loop antenna (T90-0833-05)

Remote control unit (1)
(A70-1201-05) :KPMXYM2

Remote control unit (1)
(A70-1202-05) : QETE2

AC plug adaptor (1)
(E03-0115-05)

AM Loop antenna stand
(J19-3645-05)

Use to adapt the plug on the
power cord to the shape of the
wall outlet.
(Accessory only for regions
where use is necessary.)

Battery cover (A09-0399-08)

Battery cover (A09-0399-08)

System configuration

SYSTEM MAIN UNIT SPEAKER

XD-501 RXD-501 LS-501 E30-5474-08 TE
XD-501 RXD-501 LS-501 E30-5475-05 X

XD-501W RXD-501W LS-501 E30-5474-08 Q

XD-501E RXD-501E LS-501 E30-5474-08 E2

XD-551 RXD-551 LS-551 E30-5475-05 MXY
XD-551 RXD-551 LS-551 E30-5474-08 TE

XD-551W RXD-551W LS-551 E30-5474-08 Q

XD-551E RXD-551E LS-551 E30-5474-08 E2
XD-571S RXD-571S LS-551 E30-5475-05 M2

2

SP CORD DESTI-

PARTS NO. NATION

SYSTEM MAIN UNIT SPEAKER

SP CORD DESTI-

PARTS NO. NATION

XD-A5 RXD-A5 LS-451 E30-5120-08 KP

XD-701 RXD-701 LS-701 E30-5471-05 TEX

XD-701W RXD-701W LS-701 E30-5471-05 Q

XD-701E RXD-701E LS-701 E30-5471-05 E2

XD-751 RXD-751 LS-751 E30-5471-05 MXYTE

XD-751W RXD-751W LS-751 E30-5471-05 Q

XD-751E RXD-751E LS-751 E30-5471-05 E2
XD-771S RXD-771S LS-751 E30-5471-05 M2

XD-A8 RXD-A8 LS-751 E30-5471-05 KP

-490X

-489X

X05-471X

(X09)

-551 M,X

-571 M

RXD-501 X

A,B

X04-1313-80
Q TYPE ONLY

RXD-501/701

(X32)

(X14)

(X14)

T25-0050

(CDM-27)

MECHA.

(X28)

TRDR

OUT

NC
DECK

K12

LD ON

SRDR
MDP

FFDR
FRDR

DOLBY ON/OFF
DOLBY R/P

A,B PLAY

R.REC

F.REC

A,B PACK

A/B

AUDIO OUT

OFF

ON

RF

SFDR

TFDR

SSTP

L,R

LED A,B

SOL-

MOTOR-

MOTOR B

MOTOR A

P.H A,B

VR5,6

DPSS

PS LOAD

PS IN

IC CLK

RM:ON/OFF

BIAS:ON/OFF

B:120/70

A:120/70

BIAS SW

580mV

0dBS

PB OUT

REC IN

PASS

DCL

REC

PB

REC OUT

70u

120u

B

A

AUX OUT

IN

CD

DECK

K2

K1

+-~

~

+-~

~

TUNER

AUX

FAN

FROM
OTHER CH

HEAD

FAN DRIVER

Q21-23

SUB

ONLY

RXD-701 SERIES

(M,T,X,E,Q, TYPE)

RXD-701

RXD-501(M,X TYPE)

S.P OUTPUT

17.3V/6Ω

SERIES

RXD-A5/RXD-5XX

SERIES

RXD-A8/RXD-7XX

20.49V/6Ω

24.49V/6Ω

RXD-501
SERIES ONLY

1.8V/3.3KΩ

J2

J2

+B +

L

-

+

­R

WOOFER
SP.

RELAY

+B

K11

FRONT S.P

+B

H.P RELAY

MUTE

POWER
AMP

K13

VR1

AUX LEVEL

IC19

X09,IC9
SPEANA

IC2

X1

ST SW, PS SW

LD/UNLD SW, UP/DOWN SW

RMR/BRKM/RMF/LMF/LMR

X09,IC10

M38199MF-075FP

MAIN u-COM

+5V

+5V

TC74HC166AP

POLAR
UNIT

MUTE

Q3,4

Q10,11

IC1 HA12209F

MS

AMP

REC

IC3

IC1

FL DRIVER
u-COM

A1 ED1

SENSOR

REMOTE

FL DISPLAY

IC21

OTHER CH

SURROUND

J4

WOOFER

SUB

PHONES

SURROUND
SP.

+

+

-

-

R

L

SP.

FRONT

R

L

+

-

-

+

IC4

SURROUND

SRS

VOL.

ELECTRIC

ZERO MUTE

16.9344MHz

DRIVER MUTE

IC2
CXD2587Q

DSP/DAC

IC1
RF AMP/SERVO
CXA1571M

BA5979S

IC4,5 MOTOR
DRIVER
TA8409S

L.M

DRIVER

LOADING

ROTARY
DRIVER

R.M

TRAVERSE UNIT

D40-1500

START

LIMIT SW

FOCUS

TRACKING

IC3
4ch BTL DRIVER

D.M

DRIVER

DISC MOTOR

DRIVER

FEED MOTOR

F.M

COIL

DRIVER

TRACKING COIL

COIL

FOCUS COIL
DRIVER

LD
SW

Q1

LD

F

E

C

B

A

IC5
BA10393

Q3,4

Q1,2

A PB

B R/P

IC6
EXPANDER IC

+5V

OUT

L1

MPX

L.P.F.

CHANNEL

OTHER

DOLBY

Q5

CONTROL

BIAS

VR3,4

BIAS TRAP

IC4
BA3126N

B
PB
LEVEL
VR1,2

IC3
B PB AMP

BEAT CANCEL

Q7,8

LEVEL
VR7,8

A
PB

IC2
A PB AMP

22.2dBS
60mV

OSC

BIAS

B ERASE

AUX OUT

AUX OUT

0.5V/3.3kΩ

AUX IN

AUX IN
400mV/47kΩ

MIC1,2

2.5mV/2.2kΩ

MIC

INPUT

SEL.

IC1

AM:180mV/3.3kΩ

FM:600mV/3.3kΩ

TUNER OUTPUT

BLOCK

TUNER

AC

~

D24
D26

SW

SURROUND

MATRIX

RELAY

S.W. SPEAKER

RELAY

FRONT S.P

TUNER

(IC2)

DSP

DRIVER

(IC4.5)

MOTOR

H.P RELAY

TUNER

ANALOG

MECHA.

DECK

Q19

IC13

AVR

+5V

+9V

BIAS

AVR

FL DRIVER

u-COM

MIAN u-COM

SUB u-COM

IC21

IC

IC15

AVR

POWER

+12V

IC12

AVR

-12V

Q14

AVR

-30V

Q15

AVR

+5.6V

IC21

POWER
IC

D23

D22

D24
D26

D18

D17

VR1

MIXING

IC101
(2/2)

MIC AMP

IC101
(1/2)

BLOCK DIAGRAM

RXD-501/551/571/A5/701/751/771/A8

5

RXD-501/551/571/A5/701/751/771/A8

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 and
nism are also initialized.

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

CASSETTE mecha-

1-3 Initial items and back up data

ITEMS

✣ POWER OFF
✣ VOLUME 45
✣ BALANCE CENTER

MUTING OFF
EQ OFF (ROCK)

✣ EQ. MANU FLAT

AMP EX. BASS ON

✣ SRS 3D OFF
✣ S.W. LEVEL 3 (RXD-

701/751 ONLY)

✣ INPUT SEL TUNER
✣ 3D LEVEL LEVEL +5
✣ DEMO ON
✣ BAND FM
✣ LAST f LOWEST

FREQUENCY

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 TIMER 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

✣ back up data

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

CD X ERR

6

RXD-501/551/571/A5/701/751/771/A8

CIRCUIT DESCRIPTION

2. Destination list of tuner

Desti- DSW Receiving frequency Channel PORT
nation 3(83pin) 2(84pin) 1(85pin) (86pin)

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

K3 1 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

E3 1 0 1 1 FM 87.5MHz~108.0MHz 50kHz +10.7MHz 25kHz 0

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

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

E2 0 1 1 0 FM 87.5MHz~108.0MHz 50kHz +10.7MHz 25kHz 0

RDS MW 531kHz~1602kHz 9kHz +450kHz 9kHz 0

Q 0 1 1 1 FML 65.0MHz~74.0MHz 10kHz +10.7MHz 5kHz 1

Band

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

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

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

SW 5.9MHz~17.9MHz 5kHz +450kHz 5kHz 0

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

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

SW 5.9MHz~17.9MHz 5kHz +450kHz 5kHz 0

LW 153kHz~279kHz 9kHz +450kHz 9kHz 0

FMH 87.5MHz~108.0MHz 50kHz +10.7MHz 5kHz 0

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

LW 153kHz~279kHz 9kHz +450kHz 9kHz 0

range space

IF RF

47

3. Test mode

3-1 Test mode of the receiver

3-1-1 Setting of the test mode

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

3-1-2 Canceling of the test mode

Unplug the AC power cord.

3-1-3 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
S.W. • • • • • • • • • OFF

3-1-4 Basic operation in test mode.

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

the test mode.

(2) The test mode is cancelled when the AC power is

turned OFF.

(3) The operation of the keys in the test mode, as follows.

3-1-5 The operation of the keys in the test mode.

(1) MODE / DEMO key

When this key is pressed in the test mode, all the flu­orescent 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 -8 (Min)
2 DISC 2 • • • • 3D ON level 0 (Center)
3 DISC 3 • • • • 3D ON level +8 (Max)

(3) DISC SKIP key (S level display)

With the selector on TUNER, the fluorescent changes
cyclically as follows by pressing the [DISC SKIP] key.

1 ATT is switched OFF. “ATT OFF XX”
2 ATT is switched ON. “ATT ON XX”
3 ATT is switched OFF. Normal display

XX means A/D value (HEX) of S.

(4) CD STOP key

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

î10

ì ì

î20

ì ì

î30

ì ì

î40

ì ì

î00 (

ì ì

(5) AUTO, TUNING UP/DOWN

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

)

7

RXD-501/551/571/A5/701/751/771/A8

CD MECH

CDM-27

X14, IC1

FL DRIVER uCOM

uPD780204

X09, IC10

X09, IC11

RDS IC

SAA6579

X09, IC1

SELECTOR IC

NJU7313AL

X09, IC4

SYSTEM IC

M62430FP

X09, IC9

SPEANA IC

BA3834SK

X05, IC2

PLL IC

LC72131

M38199MF-075FP

u-COM

X32, IC2

DSP

CXD2587Q

X28, IC6

EXPANDER IC

TC74HC166AP

DECK MECH

CIRCUIT DESCRIPTION

(6) 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

4. Main microprocessor

4-1 Microprocessor periphery block diagram

(7) CD OPEN/CLOSE keys

With the selector on TUNER, the channel space set­tings can be mad cyclically by pressing the
OPEN/CLOSE keys with M version.

(8) REC/ARM

Whenever the REC/ARM key is pressed, the indica­tion of S.W. (ON/OFF) is available.

8

RXD-501/551/571/A5/701/751/771/A8

CIRCUIT DESCRIPTION

4-2 Pin description

Microprocessor : M38199MF-075FP (X09, IC10)

No Name I/O Description

1 PS IN I Parallel serial IC input data
2 PS LOAD O Parallel serial IC load H : SHIFT L : LOAD
3 A MUTE O Audio mute control H : OFF L : ON
4 BP IN I Speana input (A/D converter input)
5 JOG CW I Jog input B
6 JOG CCW I Jog input A
7 ENC CW I Rotary encoder input B
8 ENC CCW I Rotary encoder input A

9 H.P. I Headphones switch input H : ON L : OFF
10 NC I/O No used
11 CD RST O CD DSP IC reset control (CXD2587Q) H : NORMAL L : RESET
12 DRV CLK O FL driver u-COM control clock
13 DRV SI O FL driver u-COM control data output
14 DRV SO I FL driver u-COM control data input
15 S LEVEL I RDS S Level input
16 RDS DATA I RDS data input

17,18 NC I No used

19 CD CK O CD DSP IC clock (CXD2587Q)
20 SQCK O CD Sub code clock (CXD2587Q)
21 CDDT O CD DSP IC data (CXD2587Q)
22 SQSO I CD Sub code input (CXD2587Q)
23 CDXL O CD latch output (CXD2587Q)
24 SENS I CD sense input (CXD2587Q)
25 CDSCK O Sense data reading clock output (CXD2587Q)
26 LD ON O CD laser output H : OFF L : ON
27 DATA O SELECTOR/SYSTEM/DAC/DOLBY IC data output
28 CLK O SELECTOR/SYSTEM/DAC/DOLBY IC clock output
29 PROT I Protection input H : PROTECTION ON L : NORMAL
30 SCOR I Sub code synchronism signal (CXD2587Q)
31 E DATA O E. vol data output (M62430FP)
32 E CLK O E. vol clock output (M62430FP)
33 NC I/O No used
34 RDS CLK I RDS clock input
35 RESET I Reset signal input H : NORMAL L : RESET
36 X CIN I Timer clock input (32.768kHz)
37 X COUT O Timer clock output (32.768kHz)
38 X IN I Main clock input (8.38MHz)
39 X OUT O Main clock output (8.38MHz)
40 VSS – GND
41 PLL DO I PLL data input
42 STEREO I Stereo detector input
43 SD I SD detector input
44 CE I Power failure input H : AC ON L : AC OFF
45 PLL CE O PLL IC chip enable (LC72131)
46 TU EMP O FM emphasis change-over (M type only) H : 100kHz L : 50kHz

Polar/Pilot change-over (Q type only) H : POLAR L : PILOT

47 FL RST O FL driver reset control output

9

RXD-501/551/571/A5/701/751/771/A8

CIRCUIT DESCRIPTION

No Name I/O Description

48 T MUTE O TUNER mute control output
49 DRV ST O FL driver u-COM control strobe output
50 HP RLY O Headphones relay control
51 SEL ST O Selector IC strobe output (NJU7313AL)
52 ATT O E. vol attenuation H : ON L : OFF
53 SYS ST O System IC strobe output (M62430FP)
54 CS RELAY O CS speaker relay control H : ON L : OFF
55 SP RELAY O Speaker relay control H : ON L : OFF
56 DOL ST O Dolby IC strobe output
57 MON O PMON control H : ON L : OFF

58~61 NC O No used

62 P RLY O Power relay control H : ON L : OFF
63 LMR O Loading motor control (reverse)
64 LMF O Loading motor control (forward) H : ON L : OFF
65 RMF O Rotary motor control (forward) H : ON L : OFF
66 BRKM O Rotary motor control (brake) H : NORMAL L : BRAKE
67 RMR O Rotary motor control (reverse) H : ON L : OFF
68 DC OFF O CD DSP IC power control (CXD2587Q) H : ON L : OFF
69 BEAT CANCEL O Beat cancel H : ON L : OFF
70 A/B O A/B Playback change-over H : B L : A
71 BIAS O Bias change-over H : ON L : OFF
72 R MUTE O Deck rec mute control H : OFF L : ON
73 NR O Dolby noise reduction change-over H : ON L : OFF
74 D-R/P O Dolby rec/play change-over H : REC L : PLAY
75 R/P O Rec/play change-over H : REC L : PLAY
76 B CPM O B deck motor control H : ON L : OFF
77 B SOL O B deck solenoid control H : ON L : OFF
78 A CPM O A deck motor control H : ON L : OFF
79 A SOL O A deck solenoid control H : ON L : OFF
80 SPE3 O Speana out 3
81 TU/SPE2 O TUNER destination (scan)/speana out 2
82 TYP/SPE1 O Model discrimination (scan)/speana out1

83~86 RET4~RET1 I

87 A-PH I A deck photo sensor input
88 B-PH I B deck photo sensor input
89 UNL SW I CD unload switch H : ON L : OFF
90 LO SW I CD load switch H : OFF L : ON
91 VCC – u-COM power supply (+5V)
92 ST SW I CD mechanism stop switch H : OFF L : ON
93 UP SW I CD mechanism up switch H : OFF L : ON
94 DN SW I CD mechanism down switch H : OFF L : ON
95 PS SW I CD mechanism position switch H : OFF L : ON
96 CD MUT O CD analog mute H : OFF L : ON
97 ZERO I CD zero mute detection H : MUTE OFF L : MUTE ON
98 VEE – GND
99 AVSS – A/D GND

100 VREF – A/D reference voltage

Model discrimination input 4~1
Discrimination of TUNER destination (DSW3~DSW0)

10

RXD-501/551/571/A5/701/751/771/A8

5. FL driver Microprocessor : uPD780204-038 (X14, IC1)

5-1Pin description

No Name I/O Description

1 VDD – u-COM power supply (+5V)
2 LED DISC1 O Disc LED 1~3 control

3, 4 NC – No used

5~9 LED A~E O CD running indicator control (D33~D37)

10 RESET I System reset
11 X2 – Main system clock (5MHz)
12 X1 I Main system clock (5MHz)
13 VSS – GND
14 NC – No used
15 NC – GND
16 VDD – u-COM power supply (+5V)
17 DRIVER CLK I Serial clock
18 DRIVER SOUT O Serial data output
19 SIN I Serial data input

20,21 NC – No used

22 LED SRS O LED control terminal (SRS)
23 LED 3 STEREO – No used
24 LED PROLOGIC – No used
25 AVSS – GND
26 A/D7 – GND

27~33 A/D6~A/D0 I Key return signal (6~0)

34 AVDD – A/D power supply
35 AVREF – A/D reference voltage

36,37 NC – GND

38 REM IN I Remocon signal input
39 DRIVER ST I Strobe signal input
40 VSS – GND
41 LED EQ O LED control terminal (SOUND)

42~44 ECHO 3~1 – No used

45 ECHO MUTE – No used
46 VDD – u-COM power supply (+5V)

47 NC – No used
48~63 SEG16~SEG1 O FL segment control (SEG16~SEG1)
64~70 SEG17~SEG23 O FL segment control (SEG17~SEG23)
71~78 SEG24~SEG31 O FL segment control (SEG24~SEG31)

79 VLOAD – Vload (-30V)
80~88 SEG32~SEG40 O FL segment control (SEG32~SEG40)

89~100 1G~12G O FL grid control (1G~12G)

11

RXD-501/551/571/A5/701/751/771/A8

CIRCUIT DESCRIPTION

6. Input expander IC (parallel-serial)

• X28, IC6 (TC74HC166AP)
Pin No. Name I/O Description

1 – I +5V
2 – I N. C.
3 DPSS I DECK DPSS DETECTION H = MUSIC L = NO MUSIC
4 A-PLAY I A DECK PLAY SW H = NOT PLAY L = PLAY
5 A-PACK I A DECK PACK DETECTION H = PACK OUT L = PACK IN
6 – I GND
7 CD CLK I CD CLOCK INPUT
8 GND I GND

9 – I + 5V
10 B-PACK I B DECK PACK DETECTION H = PACK OUT L = PACK IN
11 B-PLAY I B DECK PLAY SW H = NOT PLAY L = PLAY
12 R REC I REVERSE REC DETECTION H = REC PROHIBITION L = REC PERMITTED
13 PS IN I PS IN
14 F REC I FORWARD REC DETECTION H = REC PROHIBITION L = REC PERMITTED
15 PS LOAD I PS LOAD
16 Vcc I +5V

7. Key matrix

FL driver u-COM (uPD780204-038)

• X14, IC1
VOLTAGE (V) AD0 (33pin) AD1 (32pin) AD2 (31pin) AD3 (30pin)

0 ~ 0. 82 POWER EX. BASS CD PGM TUNING UP

0. 84 ~ 1. 64 – – DUBBING TUNING DOWN

1. 66 ~ 2. 52 – DISPLAY SRS BAND

2. 54 ~ 3. 38 – INPUT SOUND AUTO

3. 40 ~ 4. 18 – MODE / DEMO SET ENTER

4. 20 ~ 4. 78 – TIMER – –

VOLTAGE (V) AD4 (29pin) AD5 (28pin) AD6 (27pin)

0 ~ 0. 82 CD 4 A / B DOLBY NR

0. 84 ~ 1. 64 CD ¢ TAPE ¡ REV MODE

1. 66 ~ 2. 52 CD 7 TAPE £ DISC 1

2. 54 ~ 3. 38 CD 6 TAPE 7 DISC SKIP

3. 40 ~ 4. 18 CD 0 TAPE ™ DISC 2

4. 20 ~ 4. 78 TAPE ¶ TAPE 1 DISC 3

12

X05-4710

X04-1313 Q TYPE (65MHz~74MHz BAND)

X05-4890

X05-490x

NO.

ITEM

INPUT

SETTINGS

OUTPUT

SETTINGS

TUNER

SETTINGS

ALIGNMENT

POINTS

ALIGN FOR

FIG.1DISCRIMINATOR

(A)

98 MHZ,
70dBf (ANT INPUT)
1 kHz, ±40 kHz DEV

Connect a DC voltmeter

between pin 1 and pin2 of

CN2.

MONO

98.0 MHz
L31

0V

(a)

DISTORTION

L32

(EXCEPT K/P)

Minimum
distortion.

2

DISTORTION

(STEREO)

(C)

98 MHz,
70dBf (ANT INPUT)
1 kHz, ±40 kHz DEV

(B)

AUTO

98.0 MHz

IFT (A1)

Minimum
distortion.

(a)

N0.

ITEM

INPUT

SETTINGS

OUTPUT

SETTINGS

TUNER

SETTINGS

ALIGNMENT

POINTS

ALIGN FOR

FIG.

1

VCO

(E)

69 MHz,

70 dBf (ANT INPUT)

1 kHz, 0 kHz DEV

SUB, 0 kHz DEV

Connect a frequency

counter to VCO monitor

(CN2).

AUTO

69 MHz

VR 2

Adjust it the

frequency counter

reads 31.25 kHz

±100 Hz.

(a)

2

RESONANCE

POINT

(E)

69 MHz,

70 dBf (ANT INPUT)

1 kHz, 40 kHz DEV

SUB, 10 kHz DEV

Select : L or R

Connect a oscilloscope

to TUNER OUT(CN6).

AUTO

69 MHz

TC 1

Minimum
crosstalk.

(a)

3

SEPARATION

(E)

SAME AS ABOVE

Connect a oscilloscope

to TUNER OUT(CN6).

AUTO

69 MHz

VR 1

Minimum
crosstalk.

(a)

NO.

ITEM

INPUT

SETTINGS

OUTPUT

SETTINGS

TUNER

SETTINGS

ALIGNMENT

POINTS

ALIGN FOR

FIG.

1

TUNED LEVEL

(A)

98 MHz,

31.2dBf (ANT INPUT)
1 kHz, ±40 kHz DEV

MONO

98.0 MHz

VR1

Adjust VR1 and stop

at the point where

ED1 (TUNED) goes

ON.

(a)

2

DISTORTION

(STEREO)

(A)

98 MHz,

70dBf (ANT INPUT)

1 kHz, ±40 kHz DEV

PILOT: ±6 kHz DEV

(B)

AUTO

98.0 MHz

IFT (A1)

Minimum
distortion.

(a)

No.

ITEM

INPUT SETTING

OUTPUT

SETTING

TUNER

MODE

ALIGNMENT

POINTS

ALIGN FOR

FIG.

1

DISCRIMINATOR

(A)

98MHz

1kHz, ±40kHzdev

70dBf (ANT input)

Connect a DC

voltmeter to CN2

MONO

98.0MHz

L5

0V

(a)

2

DISTORTION

(STEREO)

(C)

98MHz

1kHz, ±40kHzdev

Pilot, ±6kHzdev

70dBf (ANT input)

(B)

AUTO

98.0MHz

IFT (A1)

Minimum distortion

(a)

3

SENSITIVITY

(SW)

(D)

6.5MHz

400Hz 30%mod

40dBf (ANT input)

(B)

6.5MHz

L2

Maximum output

(a)

1. Tuner adjustment

RXD-501/551/571/A5/701/751/771/A8

ADJUSTMENT

13

RXD-501/551/571/A5/701/751/771/A8

GND

L

R

L

R

FRONT

SPEAKERS

(6-16Ω)

SUPER
WOOFER
PRE OUT

AUX

OUTPUT

ANTENNA

FM
300Ω

AUX

INPUT

AUX
INPUT
LEVEL

MIN. MAX.

L

R

SURROUND

–

–

+

+

% ON

fi OFF

R

SURROUND

SPEAKERS

(6-16

Ω)

L

+–

FM

75Ω

AM

(A)

(B)

(C)

(D)

AM-SG

FM-MPX-SG

FM-MPX-SG

POLAR SG

AC voltmeter

Oscilloscope

Distortion meter

Dummy antenna

Fig (a)

KEY

DISPLAY

OPERATION

PLAY/PAUSE

+ 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 1

07 EF/FB

•

MECHANISM STOPS WHEN THE
AUTOMATIC ADJUSTMENT IS
FINISHED.

08 TG•FG

09 TE/RF
10 TE/VC

••DISPLAY CHANGES CYCLICALLY
IF NG, DISPLAY BLINKS UP

ADJUSTMENT

TO X05 CN1

9pin (Lch)

11pin (Rch)

10pin (GND)

2. Test mode of CD player

2-1 Main unit

(1) Setting of the test mode

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

(2) Canceling of the test mode

Press the [STOP] key on stop mode or unplug the
AC power code from AC wall outlet.

(3) Operation

14

3. Adjustment of CD player

RXD-501/551/571/A5/701/751/771/A8

ADJUSTMENT

No.
Step 1,2 are in TEST MODE

TEST MODE : While pressing the [PALY/PAUSE] key, plug the AC power cord into the AC outlet.

Note:
Type 4disc :SONY YEDS-18 Test Disc or equivalent. (KTD-02)
LPF : Around 47kΩ + 390pF or so.

1

2

ITEM

LASER

POWER

FOCUS
ERROR

BALANCE

INPUT

SETTING

–

Test disc

Type 4

(a) Laser Power

OUTPUT

SETTING

Set the senor section

of the optical power

meter on the pickup

lens.

Connect an oscillo-

scope as follows.
CH1 : RF(CN7 pin1)
CH2 : FE(CN7 pin6)

GND : VC(CN7 pin4)

0.05~0.15 mW

PLAYER
SETTING

Press the"PLAY"key

to check that the dis-

play is "03".

Press the "PLAY"

key. Confirm that the

display is”05”

(d)

ALIGNMENT

POINT

–

FE

BALANCE

VR1

RF signal : AC coupled

from.0.05 to 0.15mw.

when the diffraction

grating is correctly

aligned with the RF

level of 0.8Vp-p or

Optimum eye pattern

ALIGN FOR

On the power

more

FIG.

(a)

(d)

Pickup

Optical power meter

4. Test mode of DECK section

(1) Setting

While pressing the PLAY key(DECK), plug the AC
power cord into an AC power outlet.

(2) Resetting

• Disconnect the AC power cord from an AC power out­let or press the [ON/STANDBY] key.

(3) Operation in TEST mode
(a) Initial condition

Item Condition

Power ON
Selector TAPE
Main VOL. -45dB(VOL45)
EX. bass OFF
FL, LED, LCD All the FLs are turned

on for 10 seconds

¶ 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.

(b) 4-sec REC

If the REC key is pushed, the system record for 4sec.
Then, it rewinds to the REC starting position and
plays back automatically.
If the REC key is pushed during the 4-sec REC oper­ation, the system records further for 4-sec, then
returns to the starting position of the first 4-sec REC
operation and plays back.

(c) Mechanism SW detection

SW Display

B FWD REC Inhibit SW CD Calendar (1)
B RVS REC Inhibit SW CD Calendar (2)
A Pack SW CD Calendar (3)
B Pack SW CD Calendar (4)

(d) Indication of A/B deck

A/B key Display

A deck ECHO
B deck SLEEP

15

RXD-501/551/571/A5/701/751/771/A8

{

(A) (B)

X28, CN6

L IN

L OUT

R OUT

R IN

GND

1

5

AC voltmeter AG

Oscilloscope

AC voltmeter

Frequency counter

ADJUSTMENT

5. 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 1pin), Rch (X28,CN6 4pin)

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

< 1 >

< 2 >

¿. PC BOARD ADJUSTMENT

ITEM

Demagnetization

and cleaning

Azimuth of the

REC/PLAY head

INPUT

SETTING

–

TCC−153
MTT−114

10kHz, − 10dB

OUTPUT

SETTING

–

(B)

DECK

SETTING

Power : OFF

Demagnetiza-

tion,cleaning,

PLAY

PLAY

ALIGNMENT

POINT

Recording

head, erase

head,capstan

pinch roller

FWD RVS

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 adjust­ment screw for the

Lissajours waveform

pattern of the oscillo-

scope to become

close to a 45°

straight line.

FIG.

< 1 >

¡. PC BOARD ADJUSTMENT

< 1 >

< 2 >

TAPE

SPEED(NORMAL)

PLAYBACK

LEVEL

Adjust the AG

for the output of

BIAS CURRENT

become 400Hz

(-20dB)/12.5kHz

TCC−110
MTT−111

SCC−1727

3kHz

MTT− 150

400Hz

(A)

the DECK to

(-20dB)

(B)

(B)

(B)

PLAY

PLAY

REC

↕

PLAY

A DECK

VR 5

B DECK

VR 6

A DECK

VR 7 (L)
VR 8 (R)

B DECK

VR 1 (L)
VR 2 (R)

VR 3 (L)

VR 4 (R)

Adjust the tape

speed so that 3kHz

is obtained at the

center of the tape.

Adjust the playback

output to -2.5dBs

Record 400Hz and

12.5kHz alternately,
and adjust the bias
current adjustment

potentiometer for the

playback levels to

become the same.

16