Kenwood RXD-981md Schematic

3DISC

QUICK MOVE

TITLE

INPUT

TITLE

MULTI JOG

DOWN

DELETE

PUSH OPEN

TWIN

REC

O.T.E.

3D / O.T.T.

ON/STANDBY

PHONES

DISC

changer

EQUALIZER

DOLBY NR

DISPLAY

/DEMO

REC

1¡

7¶

REPEAT

BEST HITS

O.T.E. TRACK EDIT

DISC LOADING MECHANISM

INPUT

SELECT

REV.MODE

REC INPUT

SELECT

CYBER TITLER

TUNER/BAND

EX.BASS

MODE

EQUALIZER

DOLBY NR

MULTI CONTROL

/VOLUME

OPEN/CLOSE

DIGITAL AUDIO

COMPACT

MINI HiFi COMPONENT SYSTEM

TEXT

AUTO REVERSE



MINI HIFI COMPONENT SYSTEM

RXD-981MD

SERVICE MANUAL

(XD-981MD)

Knob (K29-6811-13)

Front glass (B10-2398-12)

Knob (K29-6808-12)

Knob (K29-6809-13)

Knob (K29-6808-12)

Panel (A60-1342-11)

Panel (CD) (A29-0887-12)

Front glass (CD) (B10-2399-03)

Knob (K29-6813-13)

Knob (K29-6810-12)

Knob (K29-6823-04)

Knob (K29-6811-13)

Knob (K29-6810-12)

Cassette holder (A53-2017-12)

• Refer to DM-3090 service manual(B51-5396-00), if require the following items in detail.

1) MD mechanism(MDM-97) disassembly for repair (page5,6)

2) Semiconductor description IC1101:RF signal control(page9) IC1201:ENDEC/ATRAC(page10,11) IC1401:system microcomputer(page 12,13)

3) Trouble shooting(page19~23)

• Refer to RXD-980MD service manual(B51-5299-00), if require the MD error message in detail.(page14)

Front glass (B10-2400-03)

* Refer to parts list on page 65.

Caution : No connection of ground line if disassemble the

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

unit. Please connect the ground line on rear panel, PCBs, Chassis and some others.

Knob (K29-6813-13)

Knob (K29-6810-12)

Batteries (R6/AA) (2)

Other countries

Remote

Battery cover (A09-0384-08)

control unit (1)

AM loop antenna stand (1)

Speaker cords (2)

Loop antenna (1) (T90-0833-05)

Please confirm that the following accessories are present.

FM indoor antenna (1)

Europe and U.K.

AC plug adapter (1)

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

N.B.

456

REPEAT

789

RANDOM

+10 0

PGM

CLEAR

O.T.E.

TAPE

O.T.E.

AUX

MUTE

ENTER

DISC

SELECTOR

¡

4¢

2 3

ﬁ

TITLE

TUNER

BAND

VOLUME

CONTROL

DOT

DISPLAY

TIME

DISPLAY



SLEEP

REMOTE CONTROL UNIT

RC-M1MD

TAPE MD C D

P.CALL

PTY

TA/

NEWS/INFO

REMOTE CONTROL UNIT

RC-981MD

(T90-0810-05): TE

(E03-0115-05)

(E30-5474-08)

(A70-1178-05) : RC-M1MD.......MH

(A70-1179-05) : RC-981MD.......TE

(T90-0801-05): MH

(J19-3645-05))

RXD-981MD

CONTENTS / ACCESSORIES

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

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

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

CD MECHANISM DESCRIPTION ...............................5

CIRCUIT DESCRIPTION...........................................12

ADJUSTMENT.......................................................... 26

WIRING DIAGRAM....................................................29

Accessories

PC BOARD ................................................................30

SCHEMATIC DIAGRAM............................................39

EXPLODED VIEW .....................................................61

PARTS LIST...............................................................65

PARTS DESCRIPTIONS...........................................77

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

System configuration

SYSTEM MAIN UNIT SPEAKER

XD-981MD RXD-981MD LS-N651

EXTERNAL VIEW

ANTENNA

AM FM

300Ω

75Ω

GND

SUPER WOOFER PRE OUT

SPEAKERS

i6-16‰ j

RR LL

AUX INPUT

DIGITAL

INPUT

OPTICAL

RXD-981MD

Lock terminal board * (E70-)

Power cord bushing

(J42-0083-05)

Phono jack (E63-0164-05)

Lock terminal board (E70-0057-05)

Optic receiving module (W02-1181-05)

Phono jack (E63-1024-05)

AC power cord *

(E30-)

* Refer to parts list on page 65.

RXD-981MD

TOP

(Fig: a) (Fig: b)

TOP

DISASSEMBLY FOR REPAIR

How to Assemble the Slider Ass'y in the CD Mechanism

1. Mount the black lever1to the tray slider2 and assemble them3.

2. Mount the white lever4 to the load slider5 and the open slider6, and assemble them7.

3. Insert the gear9 to the groove of the holder8.

4. Insert the L shaped part of the load slider5 to the groove of the holder8 and assemble them0.

5. Slide the load slider5 with lifting the edge of it rightwards. Next insert the hook of the load slider5 and the boss of the white lever4 to the groove of holder8. Then slide the load slider5 to the fully leftward!.

6. Mount the tray slider 2 to the holder8 and assemble them @.(note:Mount the tray slider2 to the wall of the holder8)

7. Mount the slit of the center slider# to the boss of the white lever4 and assemble them$.

How to Check the Slider Ass'y After Assembly

Stand upright the slider ass'y before check

8. Slide the center slider# leftwards and position the right edge of the gear9 to the right edge of center slider#. Refer to %.

9. Position the boss of the open slider6 to the square hole of the holder8 and slide the open slider6 fully rightwards. Mount the boss of the white lever4 assembled with the open slider6 to the groove of the center slider#. Refer to ^.

10. Slide the center slider6 fully rightwards and slide the boss of the center slider#. Refer to &.

11. Mount the boss of the SW pcb to the slit of the holder8 and do holder* to the holder8. Then fix with screw).

Fig a: Turn the gear9 upwards and the tray

slider goes downwards smoothly. The tray slider drops on the way.

Fig b: Turn the gear9 upwards and the open

slider goes downwards smoothly.

CD MECHANISM DESCRIPTION

START

Pickup moves

inwards

Pickup

position is at the

full inside?

Yes

Close ok

Open

position?

Top

position of

the holder?

Motor works

for close

Close ok?

Motor works

for open

Open ok?

Key pressed?

Motor works for load and

load the holder

Top

position of

the holder

Clamp?

Meet with the

height of t.u

ass'y and

the holder

Motor works

for store and

return to

close position

Clamp with no disc

Load or close

position?

Reset home position

of holder from bottom

In clamping?

position?

t.u. ass'y

moves full

bottom

Reset home

position of holder

from bottom

Initial end

Slider position is poor

Clamp hoder

at top holder

position?

Motor works for open and

set timer

to detect

"open error".

Open

position?

Motor start

time is over?

CD INITIALIZE FLOWCHART

RXD-981MD

DOWN

LIFT

1 2 3

a b b c

b a c b

CLOSE OPEN LOAD UNLOAD(STORE)

OPEN WAIT

(RIGHT SIDE VIEW)

(TOP VIEW)

(FRONT VIEW)

CLAMP UNCLAMP

(RIGHT SIDE VIEW)

(SIDE VIEW of TU ass'y)

LOAD

Slider ASS'Y

PLAY

Hook of slider

TRAY

TRAY NO.

TRAVERSE UNIT ASS'Y (T.U. ass'y)

CD MECHANISM DESCRIPTION

1. CD BANK MECHANISM

1-1 Function of Item Word

Function word is available in the figure.

1-2 Function of Parts

Tray... .........Each tray works in load mode only

Slider ass'y ... Lift mode(7 steps linked height). Hook of the slider ass'y in the load mode

T.U. ass'y.......Lift mode(3-steps linked the tray)

1-3 Clamp/Unclamp

1 2 3

Hook of OPEN @

TRAVELING

AREA of OPEN hook

TRAVELING

AREA of LOAD hook

Hook of LOAD !

TRAY NO

(FRONT VIEW) (RIGHT SIDE VIEW)

FRONT REAR

LIFT MOTOR LOADING MOTOR

(TOP VIEW)

< PARTS LOCATION >

RXD-981MD

CD MECHANISM DESCRIPTION

1-4 Function of Lift and Load Mode

Ex: Disc-2 Playback from The Tray Open.

• Close the tray-2(loading)

• Lift the slider ass'y(lifting)--- To lift the T.U.

• Lift the T.U.ass'y(lifting)

• Move the slider ass'y downwards(lifting)----To meet the height of the slider ass'y with the tray-2.

• Load the tray-2.

• Clamp the CD disc on the tray-2(loading)

• Lift the holder ass'y up(lifting)----- To return in home position(HP)

• Move the slider ass'y from playback to waiting position.

• End.

1-5 Home Position(HP)

• Figure shows parts location at the home position.

• Each part in the home position

• Tray ---- Waiting

• Slider ass'y ----- Top

• Hook of sliders ------ Center

• T.U. ass'y ------ Bottom(Tray-3),unclamp

2. Motor Function

RXD-981MD

< LOAD FUNCTION >

< LIFT FUNCTION >

Hook of OPEN

Hook of LOAD

TRAY 1

H.P. (no disc) (7th step)

< 7STEPS VS SLIDER ASS'Y >

1 LOAD/UNLOAD (6th step)

1 OPEN/CLOSE (5th step)

2 LOAD/UNLOAD (4th step)

3 LOAD/UNLOAD (2nd step)

2 OPEN/CLOSE (3rd step)

3 OPEN/CLOSE (1st step)

TRAY 2

TRAY 3

CD MECHANISM DESCRIPTION

• The lift motor turns counterclockwise a and the friction arm¤ moves leftwards. The arm meet with the J shaped rack gear of the lift-L slider. The slider moves backwards The slider has 7 steps cam and it makes up or down mode.

• The lift motor turns clockwise b and the slider2 moves frontwards. The slider ass'y moves upwards.

• The gear§ separates from the J shaped rack gear and gears into the gear∞. The gear∞ linked with the gear) turn counterclockwise and T.U. ass'y move upwards.

• Namely up and down modes repeat.

• The friction arm¤ is the free position in the home position. T.U.ass'y moves upwards if the lift motor turns counterclockwise.

Slider ass'y vs Height(7 steps)

2-1 Load Function

2-1-1 The slider of the slider ass'y backwards if the loading

motor turns counterclockwise(UNLOAD,OPEN MODE)

2-1-2 The slider of the slider ass'y frontwards if the loading

motor turns clockwise(LOAD,CLOSE MODE)

CD MECHANISM DESCRIPTION

4 5

OPEN

LOAD

CLAMP

Home

position

Slider (tray) ass'y

OPEN

Slider (open)

Slider (load)

Slider (center)

stops

continue to move

< CLAMP, UNCLAMP >

2-2 Each Slider Function in Slider Ass'y

RXD-981MD

The sliders(‹,$,ﬂ) moves to LOAD if turn the gear¡ counterclockwise in the home position. The sliders separates and the sliders($ and ‹) moves more rightwards and the clamp mode starts after LOAD is over.

2-3 Clamp/Unclamp Function

The slider$ kicks the cross part of the gearº by load mode. The gearª turns and moves the slider lack gear# to LOAD by the door of the tray. Then the slider# pushes the lever^ and T.U. ass'y moves upwards. The clamp function starts by lifting the T.U.ass'y.

The slider‹ moves to leftwards if the gear¡ turns clockwise in the home position. Then the open mode straits by the sliders%,‹.

full counter

clock wise

like time 8:27

TU Gear

(Ribs make a right angle)

Right angle is NG.

(out of 1 tooth)

zeneba gear

RXD-981MD

slider (CLAMP)

out of 1tooth

Boss of LEVER

(CLAMP)

< GOOD >

< NO GOOD >

CD MECHANISM DESCRIPTION

How to Assemble the Gear (zeneba)

The zeneba gearº has to meet the timing.

The T.U. ass'y doesn't work the clamp if the zeneba gear is 1 tooth out of the right position.

FUNCTION of SWITCH and MOTOR

Ref No. Parts Name Description

LM tray motor The motor for the slider(open,close load store) LFTM lift motor The motor for the lift(holder up/down, T.U.height) S1 open sw The switch for the position detector in the slider-open(Low active) S2 close sw The switch for the position detector in the slider-close(Low active) S3 load clamp sw The switch for the position detector in the slider-load(Low active) S4 unclamp sw The switch for the position detector in the disc unclamp of the T.U.(Low active) S5 tu height a sw The switch A for the height detector in the T.U.(Low active) S6 tu height b sw The switch B for the height detector in the T.U.(Low active) S7 home position sw The switch for the home position detector in the slider(Low active) S8 count sw The switch for the height detector in the holder(Low active) S9 center boss sw The switch for the disc position detector in the stocker(Low active) PTR1 disc sensor The switch for the disc detector in the close mode(Low active) SLT.SW start limit sw The switch for the most inner position detector of the pickup. IC208(X09) LM speed control To control the speed of the tray motor.(L:speed down)

RXD-981MD

CD MECHANISM DESCRIPTION

ACTUAL OPERATIONS (Refer page 8)

EX 1: Playback the Disc-1 in the All Discs Load

Load the disc-1 The slider ass'y moves

down by 2 steps (the 5th step)

The tray-1 opens

ó ....................Load the disc

The tray-1 closes

The slider ass'y moves up by 2 steps (the H.P.)

Load the disc-2 The slider ass'y moves

down by 4 steps(the 3rd step)

The tray-2 opens

ó ....................Load the disc

The tray-2 closes

The slider ass'y moves up by 4 steps(the H.P.)

Load the disc-3 The slider ass'y moves

down by 6 steps(the 1st step)

The tray-3 opens

ó ....................Load the disc

The tray-3 closes

The slider ass'y moves up by 6 steps (the H.P.)

Playback the disc-1 The T.U. ass'y moves

up by 2 steps (tray-1 height)

The slider ass'y moves down by 1 step(the 6th step)

Clamp the disc-1

The slider ass'y moves down by 1 step(the H.P.)

Load the tray-1 of the no disc.

Playback the disc

EX 2: Change to the Disc-3 in Playbacking the Disc-1(There are discs on the tray1 and 2)

Unload the tray-1 Load the tray-1 of the no disc.

The slider ass'y moves down by 1 step(the 6th steps)

Unclamp the tray-1

The slider ass'y moves up by 1 step(the H.P.)

Playback the tray-3 The T.U. ass'y moves

down by 2 steps(tray-3 height)

The slider ass'y moves down by 5 steps(the 2nd steps)

Load the tray-3 and clamp the disc-3

The slider ass'y moves up by 5 steps(the H.P.)

Load the tray-3 of the no disc.

Playback the disc-3

EX 3: Change to the Disc-2 and Playback it in Playbacking the Disc-1

Open the tray-2 The slider ass'y moves

down by 4 steps(the 3rd steps)

Open the tray-2

ó ....................Change the disc

Close the tray-2

The slider ass'y moves up by 4 steps(the H.P.)

Unload the tray-1 ó

Load the tray-1 of the no disc.

The slider ass'y moves down by 1 step(the 6th steps)

Unclamp the tray-3

The slider ass'y moves up by 1 step(the H.P.)

Playback the tray-2 ó

Change the height of the T.U. ass'y (3î1î2/down-up*) ...*1skip the 2nd

step if down

ó mode. The slider ass'y moves down by 5 steps(the 2nd step)

Clamp the disc-3

The slider ass'y moves down by 5 step(the H.P.)

Load the tray-2 of the no disc.

Playback the disc-2

RXD-981MD

CIRCUIT DESCRIPTION

1. Initialization

1-1 Setting of initial conditions

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

into an 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, MD mechanism and CASSETTE 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

✣ SURROUND OFF

✣ INPUT SEL TUNER ✣ AUX INPUT 0 (-6dB)

✣ N. B. OFF

✣ DEMO OFF ✣ 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 PLAY MODE TRACK REPEAT OFF

CD RANDOM OFF

PLAY MODE STOP TIME SINGLE ✣ DIRECTION FORWARD

DECK ✣ RVS MODE p

✣ DOLBY NR OFF OPERATION MODE STOP

✣ back up data

1-4 Mechanism initialization

1-4-1 CD mechanism

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

1-4-2 MD mechanism

• The MD ON code is input within 4 seconds after turned the power port on, the MD initial code (D122H) is output. If the MD on code is not input, the error indication is displayed as "M" on the display.

1-4-3 CASSETTE mechanism

• If a mechanism error occurs, "X" is indicated on the display.

1-5 All RAM clear

While pressing [SET] key, plug the AC power cord into an AC power outlet, the all RAM cleared.

2. TUNER preset frequency

1 FM 97.50MHz FM 97.50MHz 2 FM 108.00MHz FM 108.00MHz 3 AM 630kHz AM 630kHz 4 AM 1000kHz AM 999kHz 5 AM 1440kHz AM 1440kHz 6 AM 1610kHz AM 1602kHz 7 FM 87.50MHz FM 87.50MHz 8 FM 87.50MHz FM 87.50MHz

9 FM 87.50MHz FM 87.50MHz 10 FM 89.10MHz FM 89.10MHz 11 FM 87.50MHz FM 87.50MHz 12 FM 90.00MHz FM 90.00MHz 13 FM 106.00MHz FM 106.00MHz 14 AM 530kHz AM 531kHz 15 FM 87.50MHz FM 87.50MHz 16 FM 98.00MHz FM 98.00MHz 17 FM 98.50MHz FM 98.50MHz 18 FM 87.50MHz FM 87.50MHz 19 AM 990kHz AM 990kHz 20 FM 97.40MHz FM 97.40MHz 21 FM 87.50MHz FM 87.50MHz 22 FM 87.50MHz FM 87.50MHz 23 FM 87.50MHz FM 87.50MHz 24 FM 87.50MHz FM 87.50MHz 25 FM 87.50MHz FM 87.50MHz 26 FM 87.50MHz FM 87.50MHz 27 FM 87.50MHz FM 87.50MHz 28 FM 87.50MHz FM 87.50MHz 29 FM 87.50MHz FM 87.50MHz 30 FM 87.50MHz FM 87.50MHz 31 FM 87.50MHz FM 87.50MHz 32 FM 87.50MHz FM 87.50MHz 33 FM 87.50MHz FM 87.50MHz 34 FM 87.50MHz FM 87.50MHz 35 FM 87.50MHz FM 87.50MHz 36 FM 87.50MHz FM 87.50MHz 37 FM 87.50MHz FM 87.50MHz 38 FM 87.50MHz FM 87.50MHz 39 FM 87.50MHz FM 87.50MHz 40 FM 87.50MHz FM 87.50MHz

K2 E1/E2/H

Destination

RXD-981MD

GC-E6003

X09, IC2

X14, IC1

X14, IC2

X09 IC61

X09 IC203

X09

IC402

X09

IC403

X14

IC3

E TYPE ONLY

X09, IC7

CD mechanism

Mechanism control circuit

Auto reverse

cassette

mechanism

Head amp dolby B

HA12209F

CXD2587Q

TUNER

PLL IC LC72131

AUDIO

AMP SYSTEM IC (LC75396)

MDM-97A

LCD

LED

X14 ED1

FL BJ573GK

Key matrix encoder remocon

RDS

demodulator

DOT driver LC75710NE

E ONLY BU2090

LED ariver BU2090

M30612MA-306 FP

u-COM

CIRCUIT DESCRIPTION

3. Destination list of TUNER

Desti- U-COM Discrimination Receiving frequency Channel PORT

nation Desti- DSW1 DSW0 Band range space IF RF 92

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

H, X H 1 0 FM 87.5MHz~108.0MHz 50kHz +10.7MHz 25kHz 0

Y, M, I E1 0 1 FM 87.5MHz~108.0MHz 50kHz +10.7MHz 25kHz 0

C, V AM 531kHz~1602kHz 9kHz +450kHz 9kHz 0

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

4. Composition

4-1 Microprocessor periphery block diagram

nation (65pin) (66pin)

AM 530kHz~1610kHz 10kHz +450kHz 10kHz 0 AM 531kHz~1602kHz 9kHz +450kHz 9kHz 0

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

0=(input low) 1=(input high)

4-2 Key matrix

REFERENCE VOLTAGE (5V) Voltage 0.45 < 0.96 < 1.41< 1.85 < 2.29 < 2.74 < 3.20 < 3.64 < 4.10 <

0.96

KEY0 MODE EQ./ TAPE DOLBY TAPE TAPE TWIN TAPE KEY 94PIN BEATC. REC NR STOP PLAY REC O.T.E. OFF

KEY1 REW FF POWER MD MD MD QUICK T.EDIT/ KEY 93PIN 1¡ STOP 6 DELETE MOVE ADJ. OFF

KEY2 REPEAT SURRO- MD OTE TITLE TITLE MD SET ENTER KEY

1.41

1.85

2.29

2.74

3.20

3.64

4.10 210 <

92PIN /PROG. UND/OTT /EXE. INPUT SEARCH EJECT OFF KEY3 DISPLAY RVS INPUT BEST REC MD EXBASS TUNER KEY

91PIN MODE SELECT HITS INPUT REC /A.P.S BAND OFF KEY4 CD CD CD_3 CD_2 CD_1 CD_1 CD_2 CD_3 KEY

90PIN STOP 6 OPEN OPEN OPEN OFF

RXD-981MD

CIRCUIT DESCRIPTION

4-3 Pin description of main microprocessor: M30612MA-306FP(X09: IC7)

Pin No. Name I/O Description

1 CE O PLL/system IC(chip enable) 2 PLL-DO I PLL(LC 72131)data input 3 SD I Tuner SD detector input H: NO tuned L: tuned 4 STEREO I Stereo(tuner) detector input H: MONO L: STEREO 5 EMPHASIS O Emphasis change-over(M type only) H: 100K L: 50K 6 RDS-DATA I RDS data signal input(E type only) 7 CE I Power failure input H: AC ON L: AC OFF

8,9 BYTE,CNVSS I No used

10 XCIN I 11 XCOUT O 12 RESET I Reset H: Normal L: Reset 13 XOUT O Main clock output(10MHz) 14 VSS – GND 15 XIN I Main clock input(10MHz) 16 VCC – u-com power supply 17 NMI I +5V(VCC terminal) 18 REMOCON I Remote control input 19 RDS-CLK I RDS IC clock 20 SCOR I Sub code synchronism signal(CXD2587Q) 21 CD SW3 I CD mecha. SW3 H: OFF L: ON 22 LCD DATA/CLOCK O LCD DATA/CLOCK 23 CD SW1 I CD mecha. SW1 H: OFF L: ON 24 CD SW2 I CD mecha. SW H: OFF L: ON

25~27 CD SW5~CD SW7 I CD mecha. SW5~7 H: OFF L: ON

28 SQCK O Sub code clock(CXD2587Q) 29 SUBQ I Sub code data 30 N.C. – No used 31 FL DATA O FL driver data output(LC75710NE) 32 SW8 I CD mecha. SW8 H: OFF L: ON 33 FL CLK O Clock output for FL driver(LC75710NE) 34 FL CE O Chip enable output for FL driver(LC75710NE) 35 MD TX O TX data output to MD 36 MD RX I RX data input from MD 37 FL RST O Reset output for FL driver(LC75710NE) H: normal L: reset 38 LDC O CD laser control output H: OFF L: ON 39 CD MUTE I CD zero mute input H: OFF L: ON 40 SLCK O CD sense data read clock(CXD2587Q) 41 SENSE I CD sense input(CXD2587Q) 42 CD-CLK O CD DSP clock(CXD2587Q) 43 XLAT O CD latch output(CXD2587Q) 44 CD-DATA O CD DSP data(CXD2587Q) 45 XRST O CD DSP reset output(CXD2587Q) H: normal L: reset 46 DC OFF O CD DSP power supply H: ON L: OFF 47 DREC SEL O MD digital input selector H: digital in L: others 48 SENSOR I CD mecha. sensor H: OFF L: ON 49 M UP O CD mecha. up H: ON L: OFF 50 M OPEN O CD mecha. open H: ON L: OFF 51 TMC O CD mecha. speed control H: slow L: fast 52 M CLOSE O CD mecha. close H: ON L: OFF 53 M DOWN O CD mecha. down H: ON L: OFF 54 CD SW4 I CD mecha. SW4 input(unclamp) H: OFF L: ON 55 CD BOS I CD mecha. bos sensor input H: OFF L: ON 56 ENC4 I Rotary encoder4/Vol. input A 57 ENC3 I Rotary encoder3/Vol. input B 58 ENC2 I Rotary encoder2/Jog input A 59 ENC1 I Rotary encoder1/Jog input B 60 LED CLK O Clock output for LED driver

Timer clock input/output(32.768kHz)

RXD-981MD

CIRCUIT DESCRIPTION

Pin No. Name I/O Description

61 RES/FL DATA O Reset for FL driver 62 VCC – +5V(VCC terminal) 63 LED DATA O LED driver DATA output (BU2090) 64 VSS – GND

65,66 DSW1, DSW0 I Model discrimination

67 CD SW11 I CD mecha. load on sensor input H: OFF L: ON 68 REC/PLAY O Deck REC/PLAY change-over H: REC L: PLAY 69 BEAT C O Deck beat cancel H: ON L: OFF 70 SOL O Deck solenoid control H: ON L: OFF 71 CPM O Deck motor control H: ON L: OFF 72 REC MUTE O Deck rec mute control H: OFF L: ON 73 BIAS O Deck bias control H: ON L: OFF 74 DOLBY O Deck dolby control H: ON L: OFF 75 DPSS I Deck DPSS detection input L: ON music signal 76 REC R SW I Reverse rec detection SW L: inhibited 77 REC F SW I Forward rec detection SW L: inhibited 78 PACK SW I Deck pack SW input H: OFF L: ON 79 PLAY SW I Deck play SW input H: OFF L: ON 80 CLK O Clock output to LC75396/LC72131 81 A-MUTE O Mute control H: ON L: OFF 82 VOL ATT O Vol attenuation H: ON L: OFF 83 POWER O Power control H: ON L: OFF 84 PROTECT I Protection input H: Protect L: Normal 85 SP RELAY O Speaker relay control

86~88 SSELA~SSELC O Speana band selection(A,B,C)

89 BP IN I Speana input

90~94 KEY4~KEY0 O A/D input for keys(KEY4~KEY0)

95 RDS S LEVEL I RDS signal level 96 AVSS – A/D GND 97 PHOTO O Reel pulse input 98 VREF – A/D reference voltage 99 AVCC – +5V(VCC terminal)

100 DATA O Data for LC75396E/LC72131

4-4 Pin description of expander IC: BU2090 (X14, IC2)

Pin No. Name I/O Description

1 VSS – GND 2 DATA I DATA INPUT TERMINAL 3 CLOCK I CLOCK TERMINAL 4 TAPE_REC O TAPE REC LED H=OFF L=ON 5 TAPE_RVS O TAPE RVS LED H=OFF L=ON 6 TAPE_FWD O TAPE FWD LED H=OFF L=ON

7~9 DISC3~1 O CD DISC3~1 LED H=OFF L=ON

10 EQ O EQ LED H=OFF L=ON 11 TAPE_DOLBY O TAPE DOLBY LED H=OFF L=ON 12 MD_REC O MD REC LED H=OFF L=ON 13 POWER O STANDBY LED H=OFF L=ON 14 SURROUND O SURROUND LED H=OFF L=ON 15 MD_SLOT O MD SLOT LED H=OFF L=ON 16 VDD – POWER SUPPLY

RXD-981MD

Back up power supply (+5V)

X09, IC7

X09, IC8

MAIN u-COM

M30612MA-306FP

ENG_KANA

MD_MUTE

MUTE AND OR (MAIN u-COM)

back up sw

MD SUPPLY VOLTAGE CHANGE-OVER TERMINAL

MD_RESET

MD-ST

LOAD_IN

DSCK

K_DATA

DSTB MD_DATA

uart rxd txd

digital in analog L/R in

analog L/R out

AD / DA CONVERTER

MD CONTROL u-COM

DRIVE UNIT

MD u-DOM

RF AMP

ENDEC / ATRAC

MD mecha. unit (MDM-97A)

uPD78058GC-A59

• DISPLAY CONTROL

• RF AMP CONTROL

• SIGNAL PROCESSING IC CONTROL (TUNER)

• VOLUME, MUTE CONTROL

• INPUT SELECTOR CONTROL

back up voltage detection

5. Composition (MD section)

5-1 Microprocessor periphery block diagram

CIRCUIT DESCRIPTION

RXD-981MD

CIRCUIT DESCRIPTION

5-2 Pin description of MD u-COM: uPD78058GC-A59

Pin No Name I/O Description

1 PDOWN O MDM-97 POWER DOWN DETECTOR 2 SEARCH O CD SEARCH OUTPUT 3 LOAD IN I LOAD SWITCH INPUT 4 Avss – A/D POWER SUPPLY (CONNECTED TO GND)

5,6 – – NO USED

7 Avref1 – D/A REFERENCE VOLTAGE(+5V) 8 RXD I COMMUNICATION FROM MAIN u-COM (UART RXD)

9 TXD O COMMUNICATION TO MAIN u-COM (UART TXD) 10 – – NO USED 11 MD_DATA I MD IC IN DATA (MDM-97 IN DATA) 12 K_DATA O MD IC OUT DATA (MDM-97 OUT DATA) 13 DSCK O MD IC CK (MDM-97 CLOCK) 14 DSTB I MD IC STB (MDM-97 STB) 15 COMM_ANS I NO USED 16 COMM_DIN I NO USED 17 COMM_DOUT O NO USED 18 COMM_CLK I/O NO USED 19 COMM_REQ O NO USED

20~31 – – NO USED

32 MD VLOAD O MD LOAD VOLTAGE CHANGE-OVER DISC LOAD/EJECT : H OTHER : L 33 Vss – u-COM(CONNECTED TO GND)

34~43 – – NO USED

44 INISW I INITIAL SW (H : RXD-981MD L : J TYPE)

45~58 – – NO USED

59 SRESET O NO USED 60 RESET I u-COM RESET 61 REMOCON I REMOCON INPUT (NO USED)

62~66 – – NO USED

67 CE I u-COM CE 68 Vdd – u-COM POWER SUPPLY 69 X2 – 5MHz OSCILLATOR 70 X1 I 5MHz OSCILLATOR 71 IC – IC TERMINAL(CONNECTED TO GND) 72 XT2 – NO USED (OPEN) 73 XT1 I NO USED (CONNECTED TO GND) 74 Avdd – A/D POWER SUPPLY 75 Avref0 I A/D REFERENCE VOLTAGE

76 BACKUP I 77 AMUTE O ANALOG MUTE H : MUTE ON L : MUTE OFF

78 BACKUPSW O BACKUP DETECTOR SW H:ON(IN CASE of CE : HIGH) L:OFF(IN CASE of CE LOW) 79 MD_RESET O MD u-COM RESET H : NORMAL L : MD u-COM RESET (LOW EDGE) 80 MD_ST O MD ON/CD SYNC H : MD ON L : BACKUP MODE

BACKUP DETECTOR(A/D) BACK UP : MORE THAN2.2V NO BACKUP:LESS THAN2.2V

6. Test mode

6-1 Test mode of the receiver

(1) Setting of the test mode

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

(2) Canceling of the test mode

Unplug an AC power cord.

(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 indicate and

LEDs light. (The all illuminated state is cleared by pressing any main unit key or remocon key.

EX. BASS • • • • • OFF

(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.

(5) The operation of the keys in the test mode.

1 DISP key

When this key is pressed in the test mode, all the fluorescent light off and normal display are indicated cyclically. (FL, LED, LCD)

RXD-981MD

KEY

INDICATION

OF VOL.

VALUE Press mode key in the AUX mode

1 time

2 times

BALANCE

INPUT LEVEL

TRACK EDIT1L

-6

DELETE

44 (MID)

CENTER

QUICK MOVE

86 (MAX)R+3

CIRCUIT DESCRIPTION

2 REPEAT key

If this key is pressed when setting the test mode, the RDS indication is available on the display with the selector on TUNER.

3 DISC 1~3 keys

With the selector on AUX, when the DISC 1~3 keys are operated, the surround level settings can be made as follows.

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

4 REC INPUT key

With the selector on TUNER, the fluorescent changes cyclically as follows by pressing the REC INPUT key.

• ATT is switched OFF. “ATT OFF XX”

• ATT is switched ON. “ATT ON XX”

• ATT is switched OFF. Normal display XX means A/D value (HEX) of S.

5 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 01 ì

6 TITLE INPUT/TITLE SEARCH/TWIN REC keys

With the selector on something other than TUNER, the E.Q (Flat, Min, Max) settings can be made by pressing the TITLE INPUT/TITLE SEARCH/TWIN REC keys.

TWIN REC key E.Q Flat TITLE INPUT key E.Q Min TITLE SEARCH key E.Q Max

7 JOG DIAL key

With the selector on TUNER, the P. CALL is operated by turning the JOG DIAL key.

JOG DIAL(CW) P.CALL up JOG DIAL(CCW) P. CALL down

8 CD DISC1 OPEN/CLOSE key

With the selector on TUNER, the channel space settings can be made cyclically by pressing the DISC OPEN/CLOSE key with E1 version.

9 Other keys

During the test mode, it can be operated in a special manner that is different from an ordinary operation by using the keys on the main body, specifically as shown in the following table.

6-2 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. -63dB(VOL.17) Input level(AUX) -6dB(Input0) EX. bass OFF FL, LED, LCD All the FLs, LEDs,

and LCDs are turned on

(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.

SW Display

FWD REC Inhibit SW Calendar-1 RVS REC Inhibit SW Calendar-2

(d) O.T.E / TWIN REC indication

The LCD changes cyclically as follows.

Keys Indication of LCD

O.T.E. î TAPE, O.T.E. (light ON) î

TAPE, O.T.E. (light OFF) í

TWIN REC î TWIN REC, O.T.E. (light ON) î

TWIN REC, O.T.E. (light OFF) í

(e) AUX input level

The AUX input level settings can be made as follows by pressing keys.

Keys Input level TRACK EDIT Min (-6) DELETE Initial value (0) QUICK MOVE Max (+3)

(f) REC PAUSE

When the REV. MODE key is pressed, the REC PAUSE is entered during the REC operation.

RXD-981MD

SEL.

(PAUSE)

CD DIGITAL

SEL.

(PAUSE)

AUX IN (ANALOG)

REC IN

1. Preparation for adjustment Test disc

6-3-2 MD TEST mode for adjustment

Type Test disc

1 High reflection disc TGYS1 (SONY) 2 Low reflection disc Recording minidisc 3 Head Adjusting transparent

2. Test mode Test mode setting method

1. While pressing the [TRACK EDIT] key, plug the AC power cord into an AC power outlet. (State A is changed to state B .)

2. Insert the playback disc 1 (high reflection disc) or recording disc 2 (low reflection disc). (State C is set.) Thus, the test mode state is set.

A MD

represents version of MD microcomputer.

(When the MD (STOP) button is pressed in the C state,

is restored. To restore C again,

press

the

B EJECT

TEST

C AUTO

TEST

Entering the specific mode

Whenever the [MD REC] button is pressed, the mode is changed.

AUTO pre-adjustment AUTO adjustment RESULT SUB RESULT

EEPROM setting MANUAL adjustment MANUAL pre-adjustment

(AUTO YOBI) (AUTO AJST) (RST YOBI) (RESULT)

(EEPROM SET) (MNU AJST) (MNU YOBI)

the indication D

[MD REC] button.)

D tsm

e : TEST MODE

TEST STOP state

• Canceling the test mode

When the POWER button is pressed, the test mode is canceled, and the POWER OFF state is set.

CIRCUIT DESCRIPTION

6-3 Test mode of MD player

6-3-1 Inspection mode

Setting : While pressing the [QUICK MOVE] Key, plug the AC power cord into an AC power outlet.

The "INSPECTION" shows on the display.

Cancellation : Unplug the AC power cord from an AC power outlet.

No.

1 Digital through TITLE INPUT

2 Analog through TITLE

Contents of

TEST mode

test mode

test mode SEARCH

Keys Operation & Indication RemarKs

• The "DIGITAL1" is indicated on the display for a second. "DIGITAL1"îCD input

• The "DIGITAL 2" is indicated on the display for a second. "DIGITAL 2"îExternal digital input

• The "DIGITAL1" and "DIGITAL 2" can be changed cyclically by pressing the [TITLE INPUT] Key.

• Source indicator (MD) is blinked.

• The "ANALOG" is indicated on the display for a second.

• AUX input levelîMID

• Source indicator (AUX) is turned ON .

RXD-981MD

2. AUTO adjustment mode

Step No.

Setting Method

Remarks Display

Step 1 Testmode STOP state [ t s m e ] Step 2

Press the

MD REC button two times.

AUTO adjustment menu [ A U T O _ A J S T _ ]

Step 3 Press once the MD PLAY button. The slide moves to the innermost periphery, and automatic [ : _ _ _ _ _ _ ]

adjustment is started.

• In case of high reflection disc changes as follows. PEG→HAG

•In case of low reflection disc changes as follows. PEG→LAG→GCG→GEG→LAG

End of adjustment If adjustment is OK, Step 4.

If adjustment is NG, Step 7.

Step 4 Adjustment value output [ _ C O M P L E T E _ ]

Press the MD PLAY button. STEP 5 Press the MD STOP button. STEP 2

1. AUTO pre-adjustment mode (Low reflection disc only)

Step No.

Setting Method

Remarks Display

Step 1 Testmode STOP state [ t s m e ] Step 2 Press once the MD REC button. AUTO pre-adjustment menu [ A U T O ] Step 3 Press once the MD PLAY button. The slide moves to the innermost periphery, and automatic [ : _ _ _ _ _ _ ]

pre-adjustment is started.

• During automatic adjustment changes as follows. HAo→RFg→SAg→SBg→PTG→PCH→GTG→GCH→RCG→ SEG→RFG→SAG→HAO→HEO→TCO→LAO

End of adjustment If adjustment is OK, Step 4.

If adjustment is NG, Step 5.

Step 4 Grating adjustment, [ _ C O M P L E T E _ ]

adjustment value output Press once the MD STOP button. STEP 2

Step 5 Adjustment value output [ A U T Y O B I ]

Press once the MD STOP button. STEP 2 AUTO pre-adjustment menu

• : Adjustment name, : Address

• Test Mode

1. AUTO pre-adjustment mode • Automatic pre-adjustment is performed. (After adjustment the grating adjustment mode is set.)

• The adjustment value is output with the aid of system controller interface.

2. AUTO adjustment mode • Automatic adjustment is performed.

• The adjustment value is output with the aid of system controller interface.

• Continuous playback is performed. (Error rate indication, jump test)

3. RESULT sub-mode • The measurement value, set value and calculated value are indicated.

• The set value is changed manually (in servo OFF state).

4. RESULT mode (final adjustment) • The set value (after calculation) is indicated.

• The set value is changed manually (in servo OFF state).

5. MANUAL pre-adjustment mode • RF side manual adjustment is performed.

• Focus and tracking signal ATT manual adjustment is performed.

• Focus and tracking signal offset setting is performed.

6. MANUAL adjustment mode • Focus and tracking signal ATT manual adjustment is performed.

7. EEPROM setting mode

8. TEST-PLAY mode • Continuous playback from the specified address is performed.

• • C1 error rate measurement, This mode is not used for service.

•

This mode is not used for service.

•

This mode is not used for service.

9. TEST-REC mode • Continuous recording from the specified address is performed.

• Change of record laser output (servo gain is also changed according to laser output)

10. EJECT mode • TEMP setting (of EEPROM setting)

CIRCUIT DESCRIPTION

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