Pioneer XRA-550-MD Service manual

STEREO CD MD CASSETTE DECK RECEIVER XR-A550MD

MD

3

NR

FREQ/

ON/OFF

STATION

ASES

MD

TAPE

REC/STOP

DISP /CHARA

MENU

DELETE

MINIDISC

STEREO CASSETTE DECK

FULL LOGIC AUTO REVERSE

EJECT

REC/PLAY

COMPACT MINI COMPONENT

XR-A550MD

ORDER NO.

RRV2107

THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).

Type

KUCXJ AC120V DBDXJ AC110-127V/220-230V/240V With the voltage selector

Model

XR-A550MD the following method.

Power Requirement

The Voltage can be converted by

CONTENTS

1. SAFETY INFORMATION

......................................

2. EXPLODED VIEWS AND PARTS LIST

3. SCHEMATIC DIAGRAM

4. PCB CONNECTION DIAGRAM

5. PCB PARTS LIST

6. ADJUSTMENT

....................................................

.....................................

..........................

...............................................

................

16 42 62 70

2 3

7. GENERAL INFORMATION

7.1 PARTS

7.1.1 IC

7.1.2 DISPLAY

7.2 DIAGNOSIS

..........................................................

...........................................................

................................................

..................................................

7.2.1 DISASSEMBLY

7.2.2 DETAILS OF ERROR DISPLAY

7.2.3 TROUBLESHOOTING

7.3 BLOCK DIAGRAM

8. PANEL FACILITIES AND SPECIFICATIONS..112

................................

.....................................

........................

......................................

.........

92 92 92 94 96

96 102 104 109

PIONEER ELECTRONIC CORPORATION 4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan

PIONEER ELECTRONICS SERVICE, INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A. PIONEER ELECTRONIC (EUROPE) N.V. Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexandra Road, #04-01, Singapore 159936

c

PIONEER ELECTRONIC CORPORATION 1999

T – IZE MAR. 1999 Printed in Japan

XR-A550MD

1. SAFETY INFORMATION

This service manual is intended for qualified service technicians ; it is not meant for the casual do-ityourselfer. Qualified technicians have the necessary test equipment and tools, and have been trained to properly and safely repair complex products such as those covered by this manual. Improperly performed repairs can adversely affect the safety and reliability of the product and may void the warranty. If you are not qualified to perform the repair of this product properly and safely, you should not risk trying to do so and refer the repair to a qualified service technician.

WARNING This product contains lead in solder and certain electrical parts contain chemicals which are known to the state of California to cause cancer, birth defects or other reproductive harm.

Health & Safety Code Section 25249.6 – Proposition 65

NOTICE (FOR CANADIAN MODEL ONLY) Fuse symbols (fast operating fuse) and/or (slow operating fuse) on PCB indicate that replacement parts must be of identical designation.

REMARQUE (POUR MODÈLE CANADIEN SEULEMENT) Les symboles de fusible (fusible de type rapide) et/ou (fusible de type lent) sur CCI indiquent que les pièces de remplacement doivent avoir la même désignation.

(FOR USA MODEL ONLY)

1. SAFETY PRECAUTIONS

The following check should be performed for the continued protection of the customer and service technician.

LEAKAGE CURRENT CHECK

Measure leakage current to a known earth ground (water pipe, conduit, etc.) by connecting a leakage current tester such as Simpson Model 229-2 or equivalent between the earth ground and all exposed metal parts of the appliance (input/output terminals, screwheads, metal overlays, control shaft, etc.). Plug the AC line cord of the appliance directly into a 120V AC 60Hz outlet and turn the AC power switch on. Any current measured must not exceed 0.5mA.

Reading should not be above

0.5mA

Earth ground

Device under test

Also test with plug reversed (Using AC adapter plug as required)

Leakage current tester

Test all exposed metal surfaces

ANY MEASUREMENTS NOT WITHIN THE LIMITS OUTLINED ABOVE ARE INDICATIVE OF A POTENTIAL SHOCK HAZARD AND MUST BE CORRECTED BEFORE RETURNING THE APPLIANCE TO THE CUSTOMER.

2. PRODUCT SAFETY NOTICE

Many electrical and mechanical parts in the appliance have special safety related characteristics. These are often not evident from visual inspection nor the protection afforded by them necessarily can be obtained by using replacement components rated for voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in this Service Manual. Electrical components having such features are identified by marking with a in this Service Manual. The use of a substitute replacement component which does not have the same safety characteristics as the PIONEER recommended replacement one, shown in the parts list in this Service Manual, may create shock, fire, or other hazards. Product Safety is continuously under review and new instructions are issued from time to time. For the latest information, always consult the current PIONEER Service Manual. A subscription to, or additional copies of, PIONEER Service Manual may be obtained at a nominal charge from PIONEER.

on the schematics and on the parts list

AC Leakage Test

2

2. EXPLODED VIEWS AND PARTS LIST

XR-A550MD

NOTES:

Parts marked by "NSP" and can not be supplied.

•

The mark found on some component parts indicates the importance of the safety factor of the part.

•

Therefore, when replacing, be sure to use parts of identical designation.

Screws adjacent to mark on the product are used for disassembly.

•

2.1 PACKING

1

3

6

8(1/2)

9(1/2)

KUCXJ Type Only

12

V

K

O

A

L

R A O K

E

S

D

F

I

S

C

L

C

E E

P

P .

D

B

P

C

I

A

S

O

L

S

C

W

E

S

A

E

R

D I S

D

P

I

P

L

S

A

G

C

Y

M

A U X

R

E P E A

T R A N D

O M

S

T A T

R

I O

E M

N

O T E

C O N T

M

R O

O

L

N

U

O

N I T C U

B

-

A

X

N

R 0

D

2 5

4

5

KUCXJ Type Only

2

7

13

14

DBDXJ Type Only

15

16

9(2/2)

11

10

8(2/2)

(1) PACKING PARTS LIST

Mark No. Description Part No. Mark No. Description Part No.

1 FM Antenna ADH7004 2 Operating Instructions See Contrast table (2)

(English/French) 3 AM Loop Antenna XTB3001 4 Remote Control Unit XZN3046

(CU-XR054) 5 Battery Cover AZA7204

NSP 6 Dry Cell Battery (R6P, AA) VEM-013

7 Catalog Bag Z21-038

(0.03 × 230 × 340) 8 Front Pad XHA3003

NSP 12 Warranty Card See Contrast table (2) 13 Power Cord See Contrast table (2)

NSP 14 Polyethylene Bag AHG7033

9 Rear Pad XHA3004 10 Packing Case See Contrast table (2) 11 Packing Sheet AHG7049

15 Operating Instructions See Contrast table (2)

(Chinese/portuguese)

16 Operating Instructions See Contrast table (2)

(English/Spanish)

(2) CONTRAST TABLE

XR-A550MD/KUCXJ and DBDXJ are constructed the same except for the following :

Mark No. Symbol and Description

KUCXJ Type DBDXJ Type

2 Operating Instructions (English/French) XRE3021 Not used

10 Packing Case XHD3078 XHD3079

NSP 12 Warranty Card ARY7023 Not used

13 Power Cord ADG7022 ADG1158 15 Operating Instructions (Chinese/Portuguese) Not used XRC3011

16 Operating Instructions (English/Spanish) Not used XRE3022

Part No.

Remarks

3

XR-A550MD

2.2 EXTERIOR (1/2)

Note : Attatch on the same numbers × three

12

11

15

8

9

15

11

14

KUCXJ Type Only

11

9

2 Refer to "2.5 $M MECHA CD DIGITAL ASSY

6

20

10

12

9

19

1

4

19

5

13

3

7

4

(1) EXTERIOR (1/2) PARTS LIST

Mark No. Description Part No.

XR-A550MD

NSP 2

NSP 20 Tray Cap Assy XXG3031

1 22P F.F.C/30V XDD3018

$M MECHA CD DIGITAL Assy 3 Volume Knob XAA3005 4 FL Cover A See Contrast table (2) 5 FL Cover C XAK3071

6 Tray Cap XAK3075 7 Display Panel See Contrast table (2) 8 Bonnet Case XZN3001 9 Screw BPZ30P100FZK

10 Pioneer Badge XAM3001 11 Screw VBT30P080FZK

12 Disc Label XAX3127 13 Jog Knob Assy XXG3023 14 65 Label See Contrast table (2) 15 Screw BCZ30P080FZK

16 • • • • • 17 • • • • • 18 • • • • • 19 Cushion Rubber XEB3002

XXA3006

(2) CONTRAST TABLE

XR-A550MD/KUCXJ and DBDXJ are constructed the same except for the following :

Mark No. Symbol and Description

4 FL Cover A XAK3093 XAK3026 7 Display Panel XAK3057 XAK3064

14 65 Label ARW7050 Not used

KUCXJ Type DBDXJ Type

Part No.

Remarks

5

XR-A550MD

2.3 EXTERIOR (2/2)

20

12

18

31

19

16

18

26

19

22

25

3

2

23

9

Refer to "2.7 MD MECHANISM ASSY".

DBDXJ Type Only

33

21

19

11

19

KUCXJ Type Only

29

32

7

17

30

13

5

4

19

15

19

24

28

19

24 24

24

6

19

14

1

27

10

20

19

8

19

Refer to "2.4 FRONT PANEL SECTION".

6

XR-A550MD

(1) EXTERIOR (2/2) PARTS LIST

Mark No. Description Part No. Mark No. Description Part No.

1 AF Assy See Contrast table (2) 2 SECONDARY Assy See Contrast table (2) 3 PRIMARY Assy See Contrast table (2)

4 FM/AM TUNER MODULE AXQ7065

5 Power Transformer (T1) See Contrast table (2)

6 DC Fan Motor AXM7003

7 Fuse (FU1) See Contrast table (2) NSP 8 Chassis XNA3002

9 MD Mechanism Assy AXA7054

10 MD Bracket R XNG3011 11 PCB Bracket XNG3006

12 MD Bracket L XNG3010 13 Heat Sink XNH3003 14 Wire Clip XEC3002 15 Rear Panel See Contrast table (2)

16 MD MAIN Assy See Contrast table (2)

17 Fan Plate ANG7153 18 Push Rivet AEC7149 19 Screw VBZ30P080FZK 20 M3 Plastic Screw XBB3001

21 Screw ASZ40P060FMC 22 Cord Clamper RNH-184

23 MD SUB Assy See Contrast table (2)

24 Screw BPZ30P100FZK 25 Connector Assy 9P XDE3008

26 Connector Assy 3P XDE3024 27 Separation Sheet XEC3010 28 Screw BBZ30P300FMC

29 SUB TRANS Assy See Contrast table (2)

30 Binder ZCA-SKB90BK

NSP 31 PCB Spacer AEC7080

32 Fuse Caution Label See Contrast table (2)

33 Fuse (FU2, FU3 : T1.6A) See Contrast table (2)

(2) CONTRAST TABLE

XR-A550MD/KUCXJ and DBDXJ are constructed the same except for the following :

Mark No. Symbol and Description

1 AF Assy XWZ3172 XWZ3181 2 SECONDARY Assy XWZ3173 XWZ3182 3 PRIMARY Assy XWZ3175 XWZ3184 5 Power Transformer (T1) XTS3030 XTS3028 7 Fuse (FU1 : 4A) REK1082 Not used

KUCXJ Type DBDXJ Type

Part No.

Remarks

7 Fuse (FU1 : T3.15A) Not used AEK1059 15 Rear Panel XNC3031 XNC3032 16 MD MAIN Assy XWZ3177 XWZ3186 23 MD SUB Assy XWZ3179 XWZ3188 29 SUB TRANS Assy XWZ3176 XWZ3185

32 Fuse Caution Label XAX3132 Not used 33 Fuse (FU2, FU3 : T1.6A) Not used AEK1056

7

XR-A550MD

2.4 FRONT PANEL SECTION

17

26

40

18

13

10

22

17

15

24

34(1/2)

25

35

34(2/2)

36

29

17

6

23

7

1

17

38

2

27

17

30

4

17

19

3

16

39

21

14

32

33

11

17

37

Refer to "2.8 MECHANISM UNIT".

8

41

17

9

17

20

12

28

31

8

XR-A550MD

(1) FRONT PANEL SECTION PARTS LIST

Mark No. Description Part No. Mark No. Description Part No.

1 DISPLAY Assy See Contrast table (2) 2 MD FRONT Assy See Contrast table (2) 3 MD LED Assy See Contrast table (2)

4 Flexible Cable 11P XDD3020 5 • • • • •

6 Flexible Cable 13P XDD3021 7 Flexible Cable 11P XDD3019 8 Flexible Cable 38P XDD3004 9 Connector Assy 5P XDE3002

10 MD Lens XAK3073 11 Deck Bracket XNG3013

12 Mechanism Unit XYM3004 13 LT Conductor XAK3074 14 Door Spring R XBH3002 15 MD Flap AAN7186

16 Latch Spring R ABH7131 17 Screw BPZ30P100FZK 18 MD Spring ABH7154 19 Latch Mold R XMR3002 20 GND Plate C XNG3012

NSP 29 Jog Lens XAK3025

NSP 34 Power Button XAD3007

NSP 36 S.C. Button XAD3009 NSP 37 TIMER Button XAD3016

NSP 41 Cord with Plug DE007VE0

21 Damper Assy AXA7052 22 Flap Holder XMR3004 23 Front Panel Assy XXG3018 24 Function Button XAD3020 25 CD Button XAD3010

26 Eject Button XAD3023 27 FL Window MD XAK3070 28 Deck Lens R XZN3063

30 FL Cover MD XAK3072 31 Deck Door R XAN3009

32 Front Panel XMB3015 33 Sub Panel A XAK3046

35 Play Button XAD3022

38 FL Cover D See Contrast table (2) 39 Screw PCZ20P040FMC 40 Cushion A PED1001

(2) CONTRAST TABLE

XR-A550MD/KUCXJ and DBDXJ are constructed the same except for the following :

Mark No. Symbol and Description

1 DISPLAY Assy XWZ3174 XWZ3183

2 MD FRONT Assy XWZ3178 XWZ3187

3 MD LED Assy XWZ3180 XWZ3189 38 FL Cover D XAK3094 XAK3092

KUCXJ Type DBDXJ Type

Part No.

Remarks

9

XR-A550MD

2.5 $M MECHANISM CD

12

16

29

26

13

8

7

14

2

15

29 18

6

19

21

1

Refer to "2.6 SERVO MECHANISM ASSY".

25

22

24

23

11

5

27

28

29

10

17

29

3

30

29

9

29

10

29

XR-A550MD

2.6 SERVO MECHANISM ASSY

$M MECHANISM CD PARTS LIST

•

Mark No. Description Part No.

1 MOTOR Assy AWZ8428 NSP 2 SW Assy AWZ8429 3 CD Assy XWZ3141

4 • • • • • 5 Servo Spring ABH7126

6 Belt AEB7072 7 Clamp Magnet AMF7001 8 Yoke ANB7067 9 Mecha Base ANW7125

10 Loading Tray ANW7088 11 Servo Base ANW7089

12 Rotary Tray ANW7113 13 Clamper ANW7091 14 Clamper Holder ANW7092 15 Main Cam ANW7093

16 Gear Pully ANW7094 17 Lock Lever ANW7095 18 Planet Gear ANW7096 19 Actuater ANW7097 20 • • • • •

21 15P F.F.C/30V ADD7038 22 Connector Assy (6P) ADE7010 23 Float Rubber A AEB7063 24 Float Rubber B AEB7066 25 Servo Mechanism Assy AXA7039

1

9

8

6

7

9

4

5

26 Screw IPZ30P080FMC 27 Carriage Motor VXM1033 28 Motor Pulley PNW1634 29 Ha Narl GEM1016 30 Cushion Rubber XEB3003

3

10

2

SERVO MECHANISM ASSY PARTS LIST

•

Mark No. Description Part No.

1 Servo Mechanism AXA7039 2 SPINDLE MOTOR Assy AEA7009 3 SLEAD MOTOR Assy AEA7010 4 Gear A AEA7013 5 Gear B AEA7014

6 Screw AEA7015 7 Screw AEA7016 8 Screw AEA7017 9 Screw AEA7018

10 Leaf Switch AEA7011

11

XR-A550MD

2.7 MD MECHANISM ASSY

68

58

13

30

25

21

29

10

6

11

65

17

16

34

64

18

64

58

22

51

66

45

8

12

5

63

27

40

41

9

33

63

31

47

PWB-B

52

19

57

15

32

59 x2

B2

65

4

24

A1

26

57

14

23

48

50 59 x2

60

49

3

57

20

57

7

46

A1

38

62

1

67 x4

B1

A2

38

62

35

66

39

37

62

B2

37

62

42

43

28

PWB-A

66

12

B1

2

55

A2

53

61 x3

54

66

36

XR-A550MD

MD MECHANISM ASSY PARTS LIST

•

Mark No. Description Part No. Mark No. Description Part No.

1 Loading Gear Shaft 1242900108 2 MD Guide (B) 1242000209 3 Base Frame 1242000210 4 Flat Cable 5P (CW1901) 1245120287 5 Cartridge Holder 1242140138

36 Bottom Cover 1243230028 37 Cushion (A) 1243260020 38 Cushion (B) 1243260021 39 Cushion 1243260097 40 Magnet Head 1246100008

6 Cam Plate Lever 1242480122 7 H/A Shift Arm 1242480123 8 Holder Arm 1242480124 9 Roller Arm Lever 1242480125

10 Clamper Lever 1242480126 11 Catch 1242480127

12 Slider Lever 1242480128 13 Roller Holder Spring 1242580157 14 Spring 1242580159 15 Shift Arm Spring 1242580053

16 Holder Arm Spring 1242580054 17 Rack Spring 1242580055 18 Catch Spring 1242580094 19 Spring (A) 1242580160 20 Drive Shaft Spring 1242580161

21 Roller Arm Spring 1242580093 22 Loading Gear (B) 1242810063 23 Drive Gear 1242810064 24 Loading Gear (A) 1242810065 25 Roller Gear 1242810066

26 Rack Gear 1242810067 27 Connector 2P (CN1903) 1245120288 28 PWB-A (MD Main Assy) 1246840167 29 Roller Holder 1242860001 30 Transfer Roller 1242870014

31 Drive Shaft 1242900105 32 Pickup Guide Shaft 1242900040 33 MD Guide (A) 1242000208 34 Pickup Slide Shaft 1242900039 35 Top Cover 1243230027

41 Pickup 1246170019 42 MD Flexible Cable (24P) 1245120301 43 Connector Assy 1245120299 44 • • • • • 45 Head Guard Sheet 1244030163

46 Drive Chassis 1242070047 47 PWB-B 1245210149

(MD Mechanism Switch Assy) 48 Push Switch (SW1956) 1245300025 49 Push Switch (SW1954) 1245300026

50 Push Switch (SW1955) 1245300026 51 Push Switch (SW1952) 1245300027 52 Slide Switch (SW1953) 1305301315 53 Spindle Motor (M901) 1246300048 54 Sled Motor (M902) 1246300049

55 Loading Motor (M903) 1246300050 56 • • • • • 57 Screw 1249700161 58 Screw 1249700162 59 Screw 1249700163

60 Screw 1249700061 61 Screw 1249700065 62 Screw 1249700076 63 Screw 1249700108 64 Washer 1249900005

65 Washer 1249900006 66 Screw 1189700020 67 Screw 1249700077 68 Screw 1249700011

13

XR-A550MD

2.8 MECHANISM UNIT

2

14

12

9

10

13

1

XR-A550MD

5

6

8

11

MECHANISM UNIT PARTS LIST

•

Mark No. Description Part No.

1 Plate HD BLK F513-811 1 Plate HD BLK F513-825 2 Motor Main BLK F525-324 3 • • • • • 4 • • • • •

5 Clutch Assy BLK F522-037 6 Main Belt FF17G-31 7 • • • • • 8 Clutch Assy BLK F522-045 9 Roller Pinch BLK R F514-129

10 Roller Pinch BLK L F514-130 11 F/R Belt FF18W-12 12 Plate Base BLK F512-127 13 Plate Base BLK F512-128

15

1

XR-A550MD

3. SCHEMATIC DIAGRAM

3.1 OVERALL WIRING DIAGRAM

A

DECK I R/P HEAD

ERASE

L R

HEAD

B

A

FM/AM TUNER MODULE (AXQ7065)

23

DISPLAY ASSY

DECK MECHA

O

(KUCXJ TYPE : XWZ3174) (DBDXJ TYPE : XWZ3183)

K

K K

1/3 3/3

AF ASSY (KUCXJ TYPE : XWZ3172) (DBDXJ TYPE : XWZ3181)

4

C

SECONDARY ASSY

L

(KUCXJ TYPE : XWZ3173) (DBDXJ TYPE : XWZ3182)

CD ASSY (XWZ3141)

B

D

C

MOTOR ASSY (AWZ8428)

16

D

SW ASSY (AWZ8429)

1234

SERVO MECHANISM ASSY (AXA7039)

$M MECHA CD DIGITAL ASSY(XXA3006)

T1

POWER

TRANSFORMER

M

KUCXJ TYPE : XTS3030

DBDXJ TYPE : XTS3028

PRIMARY ASSY (KUCXJ TYPE : XWZ3175) (DBDXJ TYPE : XWZ3184)

5

678

XR-A550MD

Note : When ordering service parts, be sure to refer to "EXPLODED VIEWS and PAR TS LIST" or "PCB PARTS LIST".

MD LED ASSY

I

(KUCXJ TYPE : XWZ3180) (DBDXJ TYPE : XWZ3189)

H

MD FRONT ASSY (KUCXJ TYPE : XWZ3178) (DBDXJ TYPE : XWZ3187)

MD MECHANISM ASSY (AXA7054)

PWB-A (MD MAIN ASSY)

E

(1246840167) PWB-B (MD MECHANISM

F

SWITCH ASSY) (1245210149)

CN3331

A

B

J3651

N

SUB TRANS ASSY (KUCXJ TYPE : XWZ3176) (DBDXJ TYPE : XWZ3185)

Y2

Y1

FU1

5

J

MD SUB ASSY (KUCXJ TYPE : XWZ3179) (DBDXJ TYPE : XWZ3188)

AXM7003

NEUTRAL

AN1

LIVE

AC POWER CORD KUCXJ TYPE : ADG7022 DBDXJ TYPE : ADG1158

CN1904 CN1902

C

G

MD MAIN ASSY (KUCXJ TYPE : XWZ3177) (DBDXJ TYPE : XWZ3186)

XDE3024

D

17

6

7

8

1

XR-A550MD

3.2 FM/AM TUNER MODULE

A

23

RF AMP

1T378A

MIX AMP

4

OSC

B

C

1T378A

BUFFER

IF AMP

FM +B SW

MW RF TUNING BLOCK AXX7041

FM/AM TUNER MODULE (AXQ7065)

D

18

A

1234

5

678

XR-A550MD

A

AF AMP

B

CN3051

2/3

K

AF AMP

REGULATOR

C

PLL

D

A

5

6

7

8

19

1

23

XR-A550MD

3.3 CD, MOTOR and SW ASSEMBLIES

A

B

4

56k

R8123

C

CD ASSY

B

(XWZ3141)

MOTOR ASSY

C

(AWZ8428)

CARRIAGE MOTOR

D

J8503 D20PWW0405E

20

B C

SERVO MECHANISM ASSY (AXA7039)

1234

5

678

XR-A550MD

Note: The encircled numbers denote measuring point in the

1

2

schematic diagram.

CN8005- Pin 1 :

1

PLAY MODE (RF)

H : 500nsec/div

A

1.8Vp-p

C8308

1000p

C8307

1000p

YB

C8371

100/10

0.047

CN8005- Pin 2 :

2

TEST MODE, Tracking Open(TRER)

H : 5msec/div

VREF:CN8005- Pin3

L8371 47µH

VREF

1.0Vp-p VREF

B

CN1052

2/3K

J8502

C8257

0.1

C8256 0.1

C8255 0.1

D

SW ASSY (AWZ8429)

2SB1237X 2SB1237X

2SD1858X

C

0.047

D

B D

5

6

7

8

21

1

3

9

A4

VCC

RAA8

SYD0

S

0

E E P P

T

8

23

XR-A550MD

3.4 PWB-A (MD MAIN ASSY) and PWB-B (MD MECHANISM SWITCH ASSY)

PWB-A (MD MAIN ASSY)(1246840167)

E

A

BIN

B

R1100

27

TP1128

CN1101

Flexible PCB

SW

28272625242322212019181716151413121110

C

D

SPINDLE MOTOR

THREAD MOTOR

LOADING MOTOR

R1107

C1101

4.7

R1106

TP1127

TP1126

TP1123

+2.8VBLVVOUT

APCOUT

LDVCC

DGNG

DGND

1 2 3 4

MD LIGHT PICKUP

DILECT

LEAD IN

PLAYBACK

RECORDING

LOADING

M901

MD

M

M902

MD

M

M903

MD

M

RF1

AIN

EIN

FIN

1

10K

TP1120

TP1115

TP1116

TP1118

TP1119

LDON

LDVAR

A

COM

RF1FE

I/V

LDOUT

VCC

8

EXT.C

GND

7 6

L.DON

APC

5

LVV

L.DVAR

SW1952

SW1953

SW1954

SW1955

SW1956

PWB-B MD MECHANISM

F

SWITCH ASSY (1245210149)

+ –

RF3

TP1114

RF3

I/V

RF4

TP1113

RF4

I/V

R1902

R1901

R1904

TP1112

C1102

RF2

TP1129

TP1150

L1102

0.47µH

TP1109

TP1108

TP1111

10111213141516171819202122232425262728

VCC

AGND

MP/R

RF2

APCIN

987654321

I/V

1.8K

470

820

1

C1103

1

R1105

TP1107

DGND

LEAD IN

LOADING

R1903

820

RF2

RF1

RF4

RF3

C1104

0.027

390K

TP1106

LVVIN

HINF GND

MINF

TP1141

C1111

C1110

0.015

0.47

1

POUT

EFMAGI

EFM

ATTR

GOUT

1

2

SW

3

4

REFI

5

6

REFO RFADD

7

TCGI

8

AIN

9

BIN

10

EIN

11

FIN

12

13 14 15 16 17 18 19 20 21 22 23 24

TP

FP

FN

TP1104

TP1103

TP1102

TP1105

F-

T+F+T-

T.COOL

REC HEAD

1 2 3 4 5

CN1901

R &

BIAS

C1145

0.033

TN

TP1101

123456789

F.COOL

1 2

CN1252

CN1601 1 2 3 4 5

DIFF

IC1101 IR3R55

RF PROCESSOR

BIAS

AVCC

STBY

C1105

1

R/P

3

12

2

C1252

120P

TP1251

(CH)

Q1251

2SK2909

G

TP1252

D1251

G

LEAD IN HINF GND LOADING MINF

AGC

DISC

16

15

CN1602

SLD+

1

TP1607 TP1606

SLD–

2

CN1603

SP+

1

TP1608 TP1609

SP–

2

TP1610

CN1604

TRY+

1

TRY–

2

C1609

TP1611

1

SPN

SPP

EFMAGC

R1166

1.2K

C1251

0.027

D

S

SB0209CP

D

Q1253

S

2SK1473

TP1605 TP1604

TP1602 TP1601

C1421

0.022

SLP

SLN

SGAIN

LDVAR

LDON

AGND

D

S

D

S

AGND

LOGIC

10

R1251

D1252 SB0209CP

Q1254 2SK1473

C1422

0.022

R1612

6.8K

R1656

TRDRF TRDRR

TN TP

FP FN

FODRR FODRF

C1109

AVCC

EFMI

ADIP AGC

LPF HPF

DTEMP

DGND

DTEMP

G

Q1252 2SK2909

G

Q1601

2SA1314C

R1617

47K

56K

C1653

6.8K

R1654

T–

820P(J)

T+

F+ F–

C1651

C1650

C1652

820P(J)

C1601

820P(J)

EFMO

LATCH

C1610 R1609

1.5K

4.7

C1631

LATCH

C1254

R1652 10K

R1650 10K

10

1

10

RF2-1

CLOCK

C1255

C1605 100/10

C1107

0.0047

CLOCK

L1251

4.7

ADAGI

DATA

47uH

Vm1 IN1–

VM1–

TP1131

C1106

0.47

373839404142434445464748

ADAGC

ADLPFO

22KO

22KI

WBO

TCGO

AOUT

BOUT

EOUT

FOUT

DATA

DVCC

R1223

14 13 12 11 10

VCC

1234567

LEAD IN HINF

LOADING MINF

TP1616

C1604 56P(CH)

REG+

1

REGB

2

IN1+

3 4

VBS1

5 6

OUT1

7 8 9

VM1+

10

GND

11

VM2+

12 13

VM2–

14

OUT2

IN2–

15 16

IN2+ MUTE1

17 18

MUTE2

19

SS.GND VREF

20 21

VREFO

5ch MOTOR DRIVER

36

35

34

33

32

31

30

29

28

27

26

25

680

R1610 30K

R1611 12K

ADIPI

ADIPO

+ –

1.25V

R1155 56K

R1102

560

TP1136

TP1135

TP1134

TP1133

TP1132

EFMO

98

R1425

2.7K

IC1601

M56758FP

TP1142

TP1138

TP1260

GND

HDON

R1613

TP1137

R1154

22K

R1153

22K

R1152

22K

R1151

22K

R1150

22K

27K

TP1140

TP1139

5

IC1251

4

C1116

TP1255

74ACT02F

4.7K

R1427

R1614 18K

CH3IN

42

OUT3

41

IN3–

40 39

VBS2

38

Vm2

37

IN3+

36

VM3–

35 34

VM3+

33 32

GND

31

VM4+

30

VM4–

29

VM5+

28

VM5–

OUT5

27

IN5–

26 25

IN5+ IN4+

24 23

IN4–

22

OUT4

270P(CH)

C1115

270P(CH)

C1114

C1602

4.7 SPN SPP

270P(CH)

C1113

MINF

SLP SLN

AOUT-IN EOUT-IN

BOUT-IN FOUT-IN

WBO-I

270P(CH)

C1112

TP1130

HINF

EFMO-I

TCG

270P(CH)

L1101

LOADING

C1656

0.0056

C1657

0.0056

VREF

R1668

10µH

INNSW

C1654

6.8K

0.015

HDON

VREF

C1121 1

R1426

1K

LOADIN

C1412

10K

R1662

10K

R1664

R1658 15K

R1667 22K

R1669

6.8K

R1420

1K

680P

SPDRR

SPDRF

LD+

C1655 0.015

SLDRR

R1660 15K

SLDRF

R1666

22K

EFMO-I

AOUT-IN EOUT-IN

TCG BOUT-IN FOUT-IN

WBO-I

TP1220

R/P

R1401

1K

MINF

HINF

R1404

C1402

R1412

C1401

R1408

3.3K

100K

TP1612

0.047

R1406

C1423

100K

0.047

LDVAR

3.3K

0.022

RESET

MCCK

1K

680P

R1415

C1403

DINT DSENSE

SERCH

R1407

3.3K

CIN

0.022

C1424

J1405

10K

R/P

1

3123

2

Q1403

RN2404

L1601

1µH

1K

R1428

R1413 LD+ LD–

1K

R1409

R/P

LD–

C1661

100/10

1K

10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

R1472

47K

1 2

LDVAR

3

ADJS

4 5

LOAD IN

6

ERROR

7 8

BYTE

9

CNVSS STID OUT SEACH OUT RESET

VSS MCCK VCC

DINT DSENSE ST-ID SERCH MDRSW FSW VARI-P SW P-DOWN HDON LD+ LD– CIN INNER

Q1404 RNC1404

100

31 32

DATA

STID

99 98 97 96 95 94 93 92

AVCC

31 32

LATCH

1

22

Q1401

RN2404

TP1405

HINF

VREF

LATCH

DATA

DSTB

CLOCK

33 34 35 36 37 38 39 40 41 42 43 44

CLOCK

DSTB

33

4

1

TP1274

C1202

C1211

1

R1653

100K

FODRF FODRR

R1651 100K

TRDRF

R1657 120K

TRDRR

R1655 120K

SLDRF

R1661 82K

SLDRR

R1659 82K R1665 62K

SPDRF SPDRR

R1663

11 10

DTEMP

TP1458

R1430

10K

TP1404

10K

R1429

91 90 89 88 87 86 85 84 83 82 81

GND

MINF

AVCK2

AVCK1

DTEMP

TESTK2

TESTK1

IC1401 IX0232

MD SYSTEM

MICRO-COMPUTER

4M/16M

KDATA

DSCK

MDDATA

FOK

R/P

10K

R1471

KDATA

MDDATA

DSCK

FOK

Q1402

RNC1404

1

0.022

C1407

1

62K

R1422

R1416

VREF3.2V

10K

AVCK3

S2

10K

TP1455

TEST0

S1

TP1275

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

TP1456

TP1457

TEST1

SYRS

45 46 47 48 49 50

SYRD

SYRS

PRO

EEPD 10K

R1414

SYD6

SYD5

SYD4

SYD7

SYRS

SYRD

SYWR

100

99 98 97 96 95 94 93 92 91

SYD7

SYD5

SYD6

EFMMON AVCC EFMI

100

99 98

AGND AIN

SYRS

EIN

SYRDX

SYWRX TCG BIN FIN VBAT WBI VDD1 DGND TEST0 TEST1 TEST2

X176KO FODRF FODRR TRDRF TRDRR SLDRF

RAA1

RAA2

RAA3

SLDRR

26 27 28

SPDRF SPDRR

RAA10

RAA0

VDD2

26 27 28 29 30 31 32 33 34 35

1

C1210

A3A2A1A0A4A5A6A7A8

TP1215

C1206

A4

A5

A6

A7

A8

R1423 10K

R1424 10K

XRST

80

MUTE

TEST2

DAMUT

DIGCD

79

DOUTMT

78

DIGEX

82 81

DFS1

77

DFS0

76

EMPH

DAPON

75

ADMUT

74

ADPON

73

A/B

72

LDON

PCNT1

71

PCNT0

70 69 68

L3CLK

67

L3MODE

66 65

L3DATA

GND

64 63 62

VCC

61

EEPK EEPD

60

EPCS

59

EEPRO

58 57 56 55

SYSD5

SYSD4

54

SYSD0

49 50

53

SYSD1

52

SYSD2

51

SYSD3

SYSD7

SYSD6

SYRD

SYWR

SYD4

SYD5

SYD6

SYD7

SYWR

EEPK

IC1402

S29294A

DI

5

4

SK

DATA

6

CS

3

VCC

GND

7

2

C1405

8

1

PRTCT

0.1

E2-PROM

R1211

220

SYD3

SYD2

SYD3

SYD4

ENCOD

RAA5

RAA4

1

R141

TP1416

TP1413 TP1414 TP1415

C1406

R1476

1K

R1474

1K

SYD0 SYD1 SYD2 SYD3

EPCS

R1473 100K

SYD2

RAA6

47K

XRS

TP1454

SYD1

YD

SYD1

RAA7

1

E E E

22

E F

For details regarding schematic diagram caution items, refer to page 24.

1234

5

SYWR

678

XR-A550MD

R1211

C1208

220

0.047

XRST

SYD2

R1418

C1406

1K

SYD2

RAA6

47K

XRST

TP1454

SYD1

SYD0

SYD1

IC1201

LR37648A

RAA7

RAA8

10

VCC

A4

11

LDON

1

EEPK EEPD EPCS

PRO

TP1204

DINT

C1209

RSTX

VDD1

DGND

13

RAOEX

DGND

RACASX

A3A2A1A0A9

A1

A3

A2

IC1202

IX2474AF

4M bit D-RAM

A6

A5

A7

R1475

1K

µCON 3.2V

TP1412

SYD6

SYD5

SYD4

SYD3

SYD7

SYRS

SYRD

SYWR

275

100

99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76

SYD3

SYD4

SYD5

SYD6

SYD7

FMMON

VCC

FMI

100

99 98

GND IN

SYRS

IN

SYRDX

SYWRX

CG IN IN BAT

BI DD1 GND EST0 EST1 EST2 176KO ODRF ODRR RDRF RDRR LDRF LDRR PDRF PDRR

26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

2V

R1424 10K

85 84 83 82 81

DOUTMT

SYSD5

49 50

SYWR

46 47 48 49 50

S29294A

5 6 7 8

E2-PROM

ENCODE/DECODE/ATRAC

RAA1

RAA2

RAA3

26 27 28

RAA10

RAA0

RAA5

RAA4

VDD2

1

C1210

A3A2A1A0A4A5A6A7A8

TP1215

C1206

1

A4 A5 A6 A7 A8

R1423 10K

XRST

80

MUTE

DAMUT

DIGCD

79 78

DIGEX

82 81

DFS1

77

DFS0

76

EMPH

DAPON

75

ADMUT

74

ADPON

73

A/B

72

LDON

PCNT1

71

TP1416

PCNT0

70 69 68

TP1413

L3CLK

67

TP1414

L3MODE

66

TP1415

65

L3DATA

GND

64 63

R1476

62

VCC

61

EEPK EEPD

60

EPCS

59

R1474

58

EEPRO

57 56 55

SYD6

SYSD6

VCC

SYD5

SK CS

SYSD0 SYSD1 SYSD2 SYSD3

SYD4

SYD0

54

SYD1

53

SYD2

52

SYD3

51

EEPK

EPCS

4 3

R1473

2

100K

C1405

1

0.1

SYSD4

SYSD7

SYD7

IC1402

DI DATA GND PRTCT

DINTX

RAD2

A0

A8

MCCK

1

MCCK

14

RAD3

R1478

10K

L3CLK

L3MODE

L3DATA

RNC1407

PCNT0

CIN

DSENSE

100

R1210

COUT

RAA9

A9

OE

PCNT0

Q1821

3

Q1822

RNC1407

FOK

SENSE

48 49 50

RAWEX

RARASX

WE

RAS

CAS

I/O3

Q1820

2SA1162G

2

1

SFSY

78 77 76

SBCK

18 19 21 20 17

ACRCER

PLCK

RAD1

123456789

I/O2

I/O4

201918171615141312

R1827 270

2

3

6

SBSY

RAD0

I/O1

GND

PCNT0

SBO

TEMON

EFMO

TCRS

TP1212

FEMON DADATA ADDATA

TOTMON

CDBCLK CDLRCK CDDATA

EXPORT1 EXPORT0

X700KO

TP1214

TP1213

VREF3.2V

TP1218

DFCK BCLK LRCK

DGND

VDD3

DOUT

DGND

VDD1

TEST4 TEST3 TESO1

TP1217

DIN

XO

VPD

VXI

XI

7

75 74 73 72 71 70 69 68

67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51

R1221

220

BUCKUP

VREF3.2V

TP1216

RC120

8

L1203

4.7µH

TP1802

220

C1207

R1254

220

C1203

TP1273

C1807

TP1210

1

220/4

C1205

R1281

12P

(CH)

R1266 10K

L1201

TP1801

9

R1804

R1805

IC1906

Vcc

5

GND

R1967

47

VDD

REF

LOCK

PD VDDA AMPI AMPO VSSA

CKO

XI NC

VSS

IC1907

TC9246F

CLOCK

GENERATOR

C1992

0.1

D1990

1SS372

1

C1709

0.047

C1702

0.047

C1700

0.01

L1701 10µH

13

2

IC1802

NJM431U

AA.GND

BUCKUP

16 15 14

S2

13

S1

12

M2 M1

11 10

C1991 10

C1710

Q1701

2SC2412KR

47/4

C1701

100K

C1958

0.047

C1957 100/6.3

0.01

R1717

820

270P

C1951

0.047

R1713

R1701

DADATA ADDATA

TP1911

R1969

56

6.8K

R1964

10K

R1965

R1968

220

C1711

0.01

C1716

0.01

28 27 26 25

24 23 22 21 20

VSSO

VDDO

VOUTL

VREFD

VOUTR

UDA1340

AD/DA CONVERTER

VSSA

VDDA

VINL

VREFA

VINR

123456789

47/4

C1714

39K

1M

C1707 10/16

10/16

C1706

1

C1810

– insert circuit and measure.

6

9

23

22

R1202

1M

R1201 150

47

XL1201 C0001AW

C1204

R1269

TP1279

0.47µH

00

R1261

10K

C1952

12P(CH)

0.01

1 2 3 4 5 6 7

10K

R1262

C1954

15P (CH)

R1962

220K

R1961

100

0.47

C1953

GND

IC1990 74AC04FS INVERTER

AND GATE TC7ST08F

TP1278

1 2

R1263

34

10K

R1963

1

1.5K 2

3 4 5 6 7 89

0.047

47/6.3

C1955

C1956

Vcc

14 13 12 11 10

9

C1990

8

24

TP1701

C1743

47/4

L1702 10µH

C1703

47/4

AA.GND

TP1702

R1710

30K

R1711

39K

C1720

R1715 1K

0.01 R1716

3.3K

AA.GND

REGULATOR

Q1807

2SA1314C

R18211R1820

R1809 390

5

IC1801

XC62EP32

REGULATOR

Q1801

2SA1314C

10

C1803

C1802

1

100/10

R1802 270

R1808

223

1

27K

34

2

1

C1805

TP1803

2SA1162G

Q1806

RNC1404

C1801

2.2

1.8K

R1801

P.GND

3

Q1802 RN1406

1

R1807

Q1804

12

R1811

R1810

27K

1K

2

3

1

C1806

220K

100K

10

Q1803

RN1406

DFCK BCLK LRCK

0.001

C1964

AVDD

IC1701

VADCN

R1714 39K

R1702 680K

R1806

AVSS

VADCP

12

DADATA

TP1712

TP1713

19 18 17 16 15

TEST3

TEST2

TEST1

OVERFL

10 11 12 13 14

TP1711

TP1710

ADDATA

DATAI

VDDD

C1712

C1704 1

C1927

DATAO

VSSD

47/4

0.047

BCLK

LRCK

WS

SYSCLK

0.01

C1717

R1712

100K

L3DATA

BCK

L3DATA

L3MODE

L3CLK

L3MODE

8 9

10 11 12 13 14

DFCK

AND GATE

IC1916

74VHC08F

Vcc

C1713

PWB-B (MD MECHANISM SWITCH ASSY) SW 1952: DIRECT ON-OFF SW 1953: LEAD IN ON-OFF SW 1954: PLAYBACK ON-OFF

A

SW 1955: RECORDING ON-OFF SW 1956: LOADING ON-OFF

R1927

22

R1974

R1973

220

C1913

6.8K

DOUTO

22P

(CH)

GND

7 6 5 4 3 2 1

TP1901 TP1902

TP1904

CN1904 1 2 3 4

DIGOUT GND GND DIGIN

G

CN4101

B

: MD PLAYBACK SIGNAL : MD RECORDING SIGNAL

C1715 22/4

22/4

C

R1947

47

BUCKUP

JC121

0.047

PDOWN

R1939

R1708

1K

R1456

1K

LOADIN

Q1451

RESET

RNC1407

2

3

1

STID DSCK SERCH KDATA MDDATA DSTB

R1463

10K

C1904

0.33

C1460

LR190

1

4.7µH

R1995

2.2K

R1994

R1731

2.2K

47

R1707

R1733

R1734 47K

C1729

47

220P

CJ172

C1722

220P

100P

(CH)

4.3K R1735

4.3K

47K

R1459 10K

R1461 10K

L1950

1µH

TP1520

C1724 100P (CH)

AA.GND

R1452

3.3K

TP1518

C1425

0.047

JC196

TP1505 TP1506 TP1507 TP1508 TP1509 TP1510

D.GND

JC171 00

00

TP1502 TP1503

TP1504 R1454 1K R1458 6.8K R1460 6.8K R1462 6.8K R1464 220 R1466 220

TP1511 TP1512

TP1515

TP1516

TP1517

TP1519

TP1521

TP1522

TP1523

TP1524

JC170 00

TP1501

1 2 3 4 5 6 7 8 9

10 11 12 13 14 15 16 17 18 19 20

21

22

23 24

CN1902

PDOWN BUCKUP

LOAD SW RESET MD-ST DSCK SERCH KDATA MDDATA DSTB D.GND D.GND D.GND D.GND DVDD DVDD AVCC L IN AA.GND R IN AD.GND L OUT AA.GND R OUT

MD FLEXIBLE PCB

1

24

G

CN4002

D

– are waveform Nos. on page 25 and 26.

24

1

5

E

6

7

8

23

XR-A550MD

Voltages of PWB-A (MD MAIN ASSY)

PIN NO.

E C B

Q1801

VOLTAGE

5V 5V 43V

Q1802

VOLTAGE

0V 0V

0.15V

Q1803

VOLTAGE

0V 0V

3.1V

Q1807

VOLTAGE

3.95V

3.2V

3.3V

Q1820

VOLTAGE

3.2V

3.18V

2.4V

Q1821

VOLTAGE

0V 0V

3.08V

Q1822

VOLTAGE

0V 0V

0.1V

Q1451

VOLTAGE

0V

3.18V

0.1V

Q1401

VOLTAGE

3.2V

3.2V 0V

Q1402

VOLTAGE

0V 0V

2.3V

Q1403

VOLTAGE

3.18V 0V

3.15V

PIN NO.

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16

1

2

3

4

5

6

7

8

9 10 11 12 13 14

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18 19 20

IC1907

VOLTAGE

2.8V

2.6V

4.9V

2.6V

1.6V 0V 0V

4.9V 0V

2.2V 5V 5V 0V

3.2V

3.1V 5V

IC1990

VOLTAGE

1.45V

1.7V

1.45V

1.7V

1.45V

1.7V 0V

1.7V

1.45V

1.37V

1.7V

1.37V

1.7V

3.17V

IC1202

VOLTAGE

1.1V

1.1V 3V 2V

1.5V

1.8V

0.8V

2.4V

1.2V

3.2V

1.2V

2.5V

1.3V

1.7V

1.3V

2.2V

2.4V

1.2V

1.1V 0V

PIN NO.

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

1 2 3 4 5 6 7 8 9

E C B

IC1101

VOLTAGE

0.7V

1.6V

0.7V

1.6V

3.2V

3.2V 0V Groove:3.2V Pit:0V Low-reflectance: 0V High-reflectance:

3.2V 0V 0V

1.45V

3.2V 0V 0V

3.2V

1.78V

1.35V

1.36V

1.6V

1.6V 0V

1.6V

0.3V

1.6V

3.2V 0V 1V

1.6V

0.7V

Q1404

VOLTAGE

0V

3.15V

2.1V

Q1601

VOLTAGE

5.45V

4.4V

4.8V

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 43 44 45 46 47 48 49 50

1 2 3 4 5

VOLTAGE

1.48V 0V

1.6V 0V

1.36V

1.77V

1.6V

1.36V

1.77V

1.25V

1.6V

3.17V 0V 0V 0V 0V

1.45V

1.56V

1.62V

1.7V

1.5V

1.63V

1.53V

1.8V

1.4V

1.2V

2.5V

0.8V

1.8V

1.4V

3.2V

1.2V

2.5V

1.3V

1.7V

1.3V

2.2V 0V

2.4V

1.2V

1.1V

1.5V 2V 3V

1.1V

1.1V 0V 3V

1.56V PLAY:0V REC:1.5V

IC1801

VOLTAGE

0V 44V

3.2V

3.1V 0V

IC1901

VOLTAGE

5.5V

1.6V 0V

2.8V

5.5V

IC1201

PIN NO.

60 61 62 63 64 65 66

67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99

100

51 52 53 54 55 56 57 58 59

VOLTAGE

58V 0V 0V 58V 0V 0V

3.2V

3.17V 0V

1.3V

1.3V DIC input:1.58V Other:0V

1.58V

3.17V 0V

1.5V

1.55V

1.5V 0V 1V

1.55V

1.8V

1.56V 0V 0V

3.16V 0V 0V 0V

1.5V

3.1V

3.17V 0V

3.17V

0.5V

0.6V

0.4V

0.9V

0.7V

0.8V

3.16V

3.15V 0V

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 43 44 45 46 47 48 49 50

IC1401

VOLTAGE

0V 0V

0.2V

3.2V 0V 0V

3.1V 0V 0V 0V 0V

3.18V 144V 0V

1.5V

3.2V

3.1V 0V 0V 0V

3.15V

3.2V 0V

3.2V

3.2V 0V 0V 2V

3.2V 0V

0.8V

2.2V

0.2V

2.3V 0V PLAY:3.15V REC:0V 0V 0V 0V

3.2V 0V 0V

3.15V 0V 0V 0V 0V

PIN NO.

100

51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73

74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93

94 95 96 97 98 99

VOLTAGE

0V 0V 0V 0V 0V 0V 0V 0V

3.2V 0V

3.2V

3.2V 0V 0V

3.2V

3.2V 0V 0V

3.1V 0V

3.1V 97A:0V 97B:3.2V 0V

3.2V

3.2V 0V 0V 0V

3.15V 0V 0V

3.2V

1.7V

1.8V

1.4V Low-reflectance:

2.2V High-reflectance:

0.1V

3.2V

3.2V 0V 2V

3.2V

3.2V 0V

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

1 2 3 4 5 6 7 8

9 10 11 12 13 14

IC1601

VOLTAGE

1.25V 4V

1.5V

5.5V

1.5V 5V

2.7V

2.8V 0V 0V

2.7V

2.76V

1.6V

3.15V

3.15V 0V

1.6V

1.23V

1.6V

1.62V

2.7V

2.8V

2.7V

2.7V 0V 0V

3.0V

2.4V 0V

1.64V

5.5V

1.64V

1.68V

IC1251

VOLTAGE

2.6V

0.1V

2.6V

0.1V 0V

1.56V

0.1V

2.6V

1.56V

0.1V

2.6V

5.2V

NOTES FOR SCHEMATIC DIAGRAMS

• Resistance values unless otherwise specified are in Ω. "K" means 1000Ω, and "M" means 1000kΩ.

• Capacitors unless otherwise specified are in µF. "P" is an abbreviation for pF.

• Capacitors indicated as (CH), (RH), (TH), (UJ), (CK), etc. are ceramic tempetature compensation types. Capacitors indicated as (ML) are Mylar type.

• For electrolytic capacitors, indication is in the order of capacity and voltage resistance.

• Parts indicated with the mark ( mark) are important for safety reasons. Be sure to use the designated parts for replacement in order to ensure safety and performance.

• Voltage value indicated in each part is without signal, as measured with a digital multimeter.

• The schematic and PCB diagrams are subject to change for improved performance. Thus, they may be slightly different, depending on the set.

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

Q1251 VOLTAGE

D S G

Q1252 VOLTAGE

D S G

Q1253 VOLTAGE

D S G

Q1254 VOLTAGE

D S G

IC1701

VOLTAGE

4.4V

1.4V

2.6V

4.4V

1.4V

2.6V

15V 0V

2.6V

15V 0V

2.6V

0V

3.2V

1.4V

1.5V

1.4V 0V

3.2V 0V 0V

3.2V 0V

1.5V

3.17V

1.55V

3.17V 0V 1V 0V 0V 0V

3.2V

1.57V

3.2V

1.57V 0V

1.6V

PIN NO.

NO.

PIN NO.

1

1 2

2 3

3 4

4 5

5 6

6 7

8 9

9

10

10 11

11 12

E C B

1 2 3

1 2 3 4 5 6 7 8

IC1916

VOLTAGE

1.58V

3.2V

1.58V

3.2V DIG input:2.2V Other:0V DIG

input

Other:0V

1.55V

2.2V

3.2V

3.2V 97A:3.2V 97B:1V 97A:3.2V 97A:0.9V

Q1804

VOLTAGE

5.4V

4.8V

Q1805

VOLTAGE

0V

0.7V

3.1V

Q1701

VOLTAGE

3.2V

5.4V

3.85V

IC1802

VOLTAGE

2.46V 0V

3.85V

IC1402

VOLTAGE

0V

3.2V

3.2V 0V 0V 0V 0V

:1.58V

24

WAVEFORMS

XR-A550MD

1

2

3

TP1274

(EFMMON)

TP1103

(T+)

TP1101

(T-)

Stopped

NORM: 100M S/s

T

CH1 500mV

AC 10:1

T 1

Stopped

NORM: 2M S/s

T

CH1 500mV

AC 10:1

T 1

2

PLAY STATUS

GROOVE PLAY

CH2 500mV

AC 10:1

1997 / 08 / 04 09:30:15

500ns/div

1997 / 08 / 04 11:43:05

500us/div

Filter SMOOTH OFF BW FULL

Offset CH1 - - CH2 0.000V CH3 0.000V CH4 0.000V

Record Len Main 500 Zoom 10

Detay

0.000 000 000s

Hold Off

MIN

Trigger NORMAL EDGE CH1

Filter SMOOTH OFF BW FULL

Offset CH1 - - CH2 - - CH3 0.000V CH4 0.000V

Record Len Main 10K Zoom 100

Detay

0.000 000s

Hold Off

MIN

Trigger NORMAL EDGE CH1

1

6

(TEMON)

7

(TOTMON)

8

1

6

7

8

TP1274

TP1218

TP1217

TP1212 (TCRS)

TP1274

TP1218

TP1217

TP1212

Stopped

NORM: 1M S/s

T

CH1 2V

DC 10:1

1

T

2

3

4

Stopped

NORM: 1M S/s

T

CH1 2V

DC 10:1

1

T

2

3

4

PIT PLAY

CH3 200mV

CH2 2V

DC 10:1

AC 10:1

GROOVE PLAY

CH3 200mV

CH2 2V

AC 10:1

DC 10:1

1997 / 08 / 04 13:35:24

CH4 5V

DC 10:1

1994 / 08 / 04 13:37:11

CH4 5V

DC 10:1

1ms/div

Filter SMOOTH OFF BW FULL

Offset CH1 0.000V CH2 0.000V CH3 - - CH4 0.000V

Record Len Main 10K Zoom 100

Detay

0.000 00s

Hold Off

MIN

Trigger AUTO EDGE CH2

Filter SMOOTH OFF BW FULL

Offset CH1 0.000V CH2 0.000V CH3 - - CH4 0.000V

Record Len Main 10K Zoom 100

Detay

0.000 00s

Hold Off

MIN

Trigger AUTO EDGE CH2

4

5

4

5

TP1138

(ADLPFO)

TP1137

(WBO)

TP1138

TP1137

Stopped

NORM: 50M S/s

T

CH1 1V

DC 10:1

T

1

2

Stopped

NORM: 50M S/s

T

CH1 1V

DC 10:1

T

1

2

PIT PLAY

CH2 2V

DC 10:1

GROOVE PLAY

CH2 2V

DC 10:1

1997 / 08 / 04 11:56:15

20us/div

1997 / 08 / 04 11:55:38

20us/div

Filter SMOOTH OFF BW FULL

Offset CH1 0.000V CH2 0.000V CH3 0.000V CH4 0.000V

Record Len Main 10K Zoom 100

Detay

0.000 000 0s

Hold Off

MIN

Trigger NORMAL EDGE CH1

Filter SMOOTH OFF BW FULL

Offset CH1 0.000V CH2 0.000V CH3 0.000V CH4 0.000V

Record Len Main 10K Zoom 100

Detay

0.000 000 0s

Hold Off

MIN

Trigger

NORMAL EDGE CH1

9 6

10

11

12

13

14

9

TP1216

(FEMON)

TP1218

SPDRR

SPDRF

TP1216

TP1102

(F+)

DSENSE

FOK

Stopped

T 1

2

3

4

POWER OFF STANDBY

NORM: 500 S/s

T

CH1 2V

DC 10:1

CH2 2V

DC 10:1

POWER ON

POWER OFF STANDBY

Stopped

NORM: 1k S/s

T

CH1 2V

1

T

2

3

4

AC 10:1

CH2 2V

AC 10:1

POWER ON

CH3 2V

DC 10:1

CH3 5V

AC 10:1

1997 / 08 / 04 12:58:01

CH4 2V

DC 10:1

CH4 5V

DC 10:1

2s/div

1997 / 08 / 04 13:57:22

1s/div

Filter SMOOTH OFF BW FULL

Offset CH1 0.000V CH2 0.000V CH3 0.000V CH4 0.000V

Record Len Main 10K Zoom 100

Detay

0.00s

Hold Off

MIN

Trigger AUTO EDGE CH1

Filter SMOOTH OFF BW FULL

Offset CH1 - - CH2 - - CH3 - - CH4 0.000V

Record Len Main 10K Zoom 100

Detay

0.00s

Hold Off

MIN

Trigger AUTO EDGE CH2

25

XR-A550MD

CH2 5V

DC 10:1

CH2 2V

DC 10:1

PLAY

CH3 52V

DC 10:1

PLAY

1997 / 08 / 04 11:23:12

2us/div

1997 / 08 / 04 10:35:14

500ns/div

Filter SMOOTH OFF BW FULL

Offset CH1 0.000V CH2 0.000V CH3 0.000V CH4 0.000V

Record Len Main 2K Zoom 20

Detay

0.000 000 00s

Hold Off

MIN

Trigger NORMAL EDGE CH1

Filter SMOOTH OFF BW FULL

Offset CH1 0.000V CH2 0.000V CH3 0.000V CH4 0.000V

Record Len Main 500 Zoom 10

Detay

0.000 000 000s

Hold Off

MIN

Trigger NORMAL EDGE CH1

Stopped

NORM: 1k S/s

T

CH1 2V

DC 10:1

TP1216

9

6

15

16

6

15

16

TP1218

TP1607

(SLD+)

TP1606

(SLD-)

TP1218

TP1607

TP1606

1

T

2

3

4

Stopped

NORM: 200 S/s

T

2

3

4

CH2 2V

DC 10:1

CH2 1V

DC 10:1

CH3 5V

DC 10:1

CH3 200mV

AC 10:1

1997 / 08 / 04 14:19:52

CH4 5V

CH4 200mV

1s/div

DC 10:1

1997 / 08 / 04 14:44:01

5s/div

DC 10:1

Filter SMOOTH OFF BW FULL

Offset CH1 0.000V CH2 0.000V CH3 0.000V CH4 0.000V

Record Len Main 10K Zoom 100

Detay

0.00s

Hold Off

MIN

Trigger AUTO EDGE CH2

Filter SMOOTH ON BW FULL

Offset CH1 0.000V CH2 0.000V CH3 - - CH4 25.000V

Record Len Main 10K Zoom 20

Detay

0.00s

Hold Off

MIN

Trigger AUTO EDGE CH2

18

20

17

21

20

DADATA

BCLK

LRCK

DFCK

BCLK

Stopped

NORM: 100M S/s

T

CH1 5V

DC 10:1

T

1

2

3

Stopped

NORM: 100M S/s

T

CH1 2V

DC 10:1

T

1

2

18

17

19

D/A CONVERSION PLAY

NORM: 100M S/s

T

CH1 2V

DC 10:1

CH2 2V

DC 10:1

LRCK

Stopped

T

1

DADATA

2

A/D CONVERSION

while ANALOG REC (no signal) is in progress

Stopped

NORM: 100M S/s

T

LRCK

ADDATA

CH1 2V

T

1

2

DC 10:1

CH2 2V

DC 10:1

1997 / 08 / 04 10:03:45

5us/div

1997 / 08 / 04 10:12:30

5us/div

Filter SMOOTH OFF BW FULL

Offset CH1 0.000V CH2 0.000V CH3 0.000V CH4 0.000V

Record Len Main 5K Zoom 50

Detay

0.000 000 00s

Hold Off

MIN

Trigger NORMAL EDGE CH1

Filter SMOOTH OFF BW FULL

Offset CH1 0.000V CH2 0.000V CH3 0.000V CH4 0.000V

Record Len Main 5K Zoom 50

Detay

0.000 000 00s

Hold Off

MIN

Trigger NORMAL EDGE CH1

Stopped

NORM: 100M S/s

T

CH1 2V

DC 10:1

DiN

DOUT

T

1

2

22

23

DIGITAL REC

CH2 2V

DC 10:1

1997 / 08 / 04 16:59:39

500ns/div

Filter SMOOTH OFF BW FULL

Offset CH1 0.000V CH2 0.000V CH3 0.000V CH4 0.000V

Record Len Main 500 Zoom 50

Detay

0.000 000 000s

Hold Off

MIN

Trigger NORMAL EDGE CH1

1 kHz 0dB Sine Wave PLAY

Stopped

NORM: 5M S/s

T

CH1 500mV

DC 10:1

T

VOUTL

24

VOUTR

1

1997 / 08 / 04 09:47:21

200us/div

Filter SMOOTH OFF BW FULL

Offset CH1 0.0000V CH2 0.000V CH3 0.000V CH4 0.000V

Record Len Main 10k Zoom 100

Detay

0.000 000 s

Hold Off

MIN

Trigger NORMAL EDGE CH1

26

XR-A550MD

27

1

XR-A550MD

3.5 MD MAIN ASSY

A

B

23

G

MD MAIN ASSY (KUCXJ TYPE : XWZ3177) (DBDXJ TYPE : XWZ3186)

4

CN4506

H

RSS1042

2/3

K

C

CN1054

CN1904

E

R4599

MTZJ5.1B

33

PWB-A(MD MAIN ASSY)

D

CN1902

28

G

1234

(MD)

5

678

XR-A550MD

: MD or DECK PB SIGNAL ROUTE

(MD)

: MD PB SIGNAL ROUTE : MD REC SIGNAL ROUTE

(PB)

J

: DECK PB SIGNAL ROUTE

A

CN4001

CN5502

O

B

(MD)

C

(PB)

2/3

K

CN3002

(MD) (MD)

2/3

K

NJM4558MD

(MD)

(PB)

G

5

6

7

8

CN3001

D

29

1

23

XR-A550MD

3.6 MD FRONT, MD LED and MD SUB ASSEMBLIES

A

B

4

H

MD FRONT ASSY (KUCXJ TYPE : XWZ3178) (DBDXJ TYPE : XWZ3187)

MD FRONT ASSY S4501 : MD EJECT S4502 : DELETE

MSM9202-01

C

S4503 : MENU S4504 : DISPLAY/CHARA

CN4503

G

D

MD LED ASSY

I

(KUCXJ TYPE : XWZ3180) (DBDXJ TYPE : XWZ3189)

30

H I

1234