Pioneer XRA-770 Service manual

STEREO CD CASSETTE DECK RECEIVER

XR-A770

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

Type

MYXJ AC220-230V NVXJ AC230V

Model

XR-A770

Power Requirement Remarks

ORDER NO.

RRV2054

CONTENTS

1. SAFETY INFORMATION ...................................... 2

2. EXPLODED VIEWS AND PARTS LIST................ 3

3. SCHEMATIC DIAGRAM ..................................... 14

4. PCB CONNECTION DIAGRAM.......................... 31

5. PCB PARTS LIST ............................................... 44

6. ADJUSTMENT .................................................... 49

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

PIONEER ELECTRONIC CORPORATION 1998

7. GENERAL INFORMATION ............................... 55

7.1 PARTS ......................................................... 55

7.1.1 IC ......................................................... 55

7.1.2 DISPLAY.............................................. 61

7.2 DISASSEMBLY ........................................... 63

7.3 BLOCK DIAGRAM....................................... 66

8. PANEL FACILITIES AND SPECIFICATIONS.... 68

T – ZZK NOV. 1998 Printed in Japan

XR-A770

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.

LABEL CHECK

NVXJ Type

THIS PIONEER APPARATUS CONTAINS

IMPORTANT

LASER OF CLASS 1. SERVICING OPERATION OF THE APPARATUS SHOULD BE DONE BY A SPECIALLY INSTRUCTED PERSON.

LASER DIODE CHARACTERISTICS MAXIMUM OUTPUT POWER: 1.3 mW WAVELENGTH: 790 nm ± 25 nm

MYXJ Type

Additional Laser Caution

1.Laser Interlock Mechanism The position of the switch (S8501) for detecting loading state is detected by the system microprocessor, and the design prevents laser diode oscillation when the switch (S8501) is pressed physically. Thus, the interlock will no longer function if the switch (S8501) is released physically and deliberatery.

The interlock also does not function in the test mode ∗.

Printed on the Rear Panel

Laser diode oscillation will continue, if pin 62 of LA9240ML (IC8101) on the CD ASSY mounted on the $M Loading Mechanism assembly is connected to GND, or else the terminals of Q8101 are shorted to each other (fault condition).

2.When the cover is opened, close viewing of the objective lens with the naked eye will cause exposure to a Class 1 laser beam.

∗

: Refer to page 54.

2

2. EXPLODED VIEWS AND PARTS LIST

XR-A770

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)

16

4

13

NVXJ Type Only

17

2

15

18

VOL

K A

R A O K

E

S

DISC DISC DISC

F

S

C L E E

13

14

P

P .B

POWER

A S

S D IS P

L A Y

A

U

X

O M

CLEAR

PGM

R E P E A T

R A N D

S TATIO

REMOTE CONTROL UNIT CU-XR025

N

MONOBAND

5

MYXJ Type Only

12

9

MYXJ

9(1/2)

Type Only

7

19

9(2/2)

MYXJ

11

Type Only

MYXJ Type Only

8(2/2)

(1) PACKING PARTS LIST

Mark No. Description Part No.

1 FM Antenna ADH7005 2 Operating Instructions XRE3014

(English/French) 3 AM Loop Antenna XTB3001 4 Remote Control Unit XZN3007

(CU-XR049) 5 Battery Cover AZA7204

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

7 Polyethylene Bag Z21-038

(0.03 × 230 × 340) 8 Front Pad See Contrast table (2)

9 Rear Pad See Contrast table (2)

Mark No. Description Part No.

10 Packing Case See Contrast table (2)

11 Packing Sheet AHG7049 12 Fuse (T5A) See Contrast table (2) 13 Power Cord See Contrast table (2) NSP 14 Polyethylene Bag See Contrast table (2)

15 Operating Instructions XRE3016

(English/French/German/Italian/Dutch/

Swedish/Spanish/Portuguese/Chinese) NSP 16 Door Spacer XHG3002 NSP 17 Warranty Card ARY7022

18 Operating Instructions See Contrast table (2) 19 Operating Instructions See Contrast table (2)

(2) CONTRAST TABLE

XR-A770/MYXJ and NVXJ are constructed the same except for the following :

Part No.

Mark No. Symbol and Description

8 Front Pad XHA3005 XHA3009

9 Rear Pad XHA3006 XHA3010 10 Packing Case XHD3050 XHD3070 12 Fuse (T5A) Not used AEK1016 13 Power Cord ADG1154 ADG1156

XR-A770 XR-A770

/MYXJ /NVXJ

10

Remarks

NSP 14 Polyethylene Bag AHG7033 Not used

18 Operating Instructions (Italian/German/Dutch) XRC3003 Not used 19 Operating Instructions XRC3004 Not used

(Portuguese/Swedish/Spanish)

3

XR-A770

2.2 EXTERIOR (1/2)

15

8

9

11

15

Note : Hook Tray cap on top of loading tray and then insert the bottom three hooks.

Note : Attatch on the same numbers × three.

Refer to "2.5 $M MECHANISM CD".

2

6

10

12

16 17

18

11

9

12

11

9

1

4

5

13

7

14

3

18

4

EXTERIOR (1/2) PARTS LIST

•

Mark No. Description Part No.

XR-A770

NSP 2 $M Mechanism CD XXA3006

NSP 16 Cord Stopper DNF1128

1 22P F.F.C/30V XDD3018 3 Volume Knob XAA3005

4 FL Cover A XAK3026 5 FL Cover B XAK3036

6 Tray Cap XZN3047 7 Display Panel XAK3049 8 Bonnet Case XZN3040 9 Screw BPZ30P100FZK

10 Pioneer Badge XZN3049 11 Screw VBT30P080FZK

12 Disc Label XAX3127 13 Jog Knob Assy XXG3023 14 Bass Knob XAB3005 15 Screw BCZ30P080FZK

17 Push Rivet AEC7138 18 Cushion Rubber XEB3002

5

XR-A770

2.3 EXTERIOR (2/2)

19

27

18

1

20

13

35

16

19

d

c

b

c

a

19

36

b

3

2

21

b

c

a

b

a

b

c

a

38

28

aa

40

30

34

b

28

33

19

12

23

39

22

4

MYXJ Type only

41

43

NVXJ Type only

19

24

11

29

25

19

Refer to "2.4 FRONT PANEL SECTION".

7

11

24 24

24

5

22

9

24

10

19

14

19

17

MYXJ Type only

42

15

NVXJ Type only

19

8

26

6

(1) EXTERIOR (2/2) PARTS LIST

XR-A770

Mark No. Description Part No.

1 AF Assy XWZ3120 2 SECONDARY Assy XWZ3121 3 PRIMARY Assy XWZ3152

4 FM/AM TUNER MODULE AXQ7068

5 Power Transformer (T1) XTS3018

6 • • • • • 7 Fuse (FU1 : T4A) AEK1060 NSP 8 Chassis XNA3001

9 DC Fan Motor AXM7003

10 Fan Plate ANG7153 11 PCB Bracket XNG3006

12 Ceramic Capacitor CKPUYB102K50 13 Heat Sink XNH3004 14 Wire Clip A XEC3003 15 Rear Panel XNC3012

16 Cord Stopper DNF1128

NSP 17 SUPPORT Assy XNP3009

18 Screw BBZ30P140FMC 19 Screw VBZ30P080FZK

NSP 20 Tweeter Cover XAK3069

Mark No. Description Part No.

21 Screw ASZ40P060FMC 22 Binder ZCA-SKB90BK 23 Earth Plate XNG3015 24 Screw BPZ30P100FZK 25 Screw BBZ30P300FMC

NSP 26 Name Label See Contrast table (2)

27 Screw BBZ30P060FMC

28 Screw IBZ30P135FMC 29 SUB TRANS Assy XWZ3139 30 REAR AMP Assy XWZ3122

31 • • • • •

32 • • • • •

33 H.S.Bracket XNG3007

34 FET Bracket XNG3009

35 H.S.Support XNG3014

36 Wire Clip B XEC3004

37 • • • • •

38 Mica Sheet XEE3002

39 Locking Spacer XEC3009

40 Card Spacer XEC3008

41 Caution Label HE See Contrast table (2) 42 Caution Label See Contrast table (2) 43 Caution Label See Contrast table (2)

(2) CONTRAST TABLE

XR-A770/MYXJ and NVXJ are constructed the same except for the following :

Part No.

Mark No. Symbol and Description

NSP 26 Name Label Not used XAL3012

Caution Label HE

41

Caution Label

42

Caution Label

43

XR-A770 XR-A770

/MYXJ /NVXJ

PRW1233 Not used VRW1094 Not used

Not used PRW1018

Remarks

7

XR-A770

2.4 FRONT PANEL SECTION

30

18

21

33

15

13

23

32

26

24

6

34(1/2)

17

2

34(2/2)

17

5

7

37

A

46

1

25

35

20

19

16

21

17

A

8

36

10

9

27

28

31

44

45

14

12

Refer to

17

6

17

43

"2.7 MECHANISM UNIT".

38

40

42

3

8

XR-A770

FRONT PANEL SECTION PARTS LIST

•

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

1 DISPLAY Assy XWZ3123 2 CD SW LED Assy XWZ3131 3 SUB DISPLAY Assy XWZ3112

4 • • • • •

NSP 5 Cord With Plug DE007VE0

6 Flexible Cable 14P XDD3011 7 Flexible Cable 19P XDD3009 8 Flexible Cable 38P XDD3004 9 Connector Assy 3P XDE3013

10 Connector Assy 5P XDE3014 11 • • • • •

12 Mechanism Unit XYM3003 13 Door Spring L XBH3001 14 Door Spring R XBH3002 15 Latch Spring L ABH7130

16 Latch Spring R ABH7131 17 Screw BPZ30P100FZK 18 Latch Mold L XMR3001 19 Latch Mold R XMR3002

NSP 20 Jog Lens XAK3025

21 Damper Assy AXA7052 22 • • • • •

NSP 23 Front Panel Assy XXG3016

24 Function Button XZN3020 25 CD Button XZN3018

26 CD Lens XZN3037

27 Deck Lens L XZN3035

28 Deck Lens R XZN3036

29 • • • • •

30 Door Pocket L XZN3013

31 Door Pocket R XZN3015

32 Front Panel A XZN3011

33 Sub Panel A XZN3041

34 Power Button XZN3022

35 Play Button XZN3024

36 S.C. Button XZN3025

37 TIMER Button XZN3029

38 Sub Buttun XAD3012

39 • • • • •

40 Diffusion Sheet XAK3035

41 • • • • •

42 Button Lens XAK3043 NSP 43 Front Panel Assy B XXG3026

44 Sub Panel B XZN3052

45 Front Panel B XZN3050

46 Binder ZCA-SKB90BK

9

XR-A770

2.5 $M MECHANISM CD

13

8

21

7

14

1

Refer to "2.6 SERVO MECHANISM ASSY".

25

22

24

23

11

12

10

30

16

29

26

17

15

29

18

2

19

6

27 28

3

5

10

29

9

29

XR-A770

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-A770

2.7 MECHANISM UNIT

Mech. Ι Only

Mech. ΙΙ

4

Mech. ΙΙ Only

7

3

12

Mech. Ι

13

Mech. Ι

9

Mech. ΙΙ Only

10

1

2

Mech. ΙΙ

12

XR-A770

5

8

11

6

MECHANISM UNIT PARTS LIST

•

Mark No. Description Part No.

1 Plate HD BLK (Mech. Ι) F513-819 2 Plate HD BLK (Mech. ΙΙ) F513-811 3 Motor Main BLK (Mech. ΙΙ only) F525-324 4 PCB Control BLK F567-621 5 Clutch Assy BLK F522-037

6 Main Belt FF17G-31 7 Joint Belt 113 (Mech. ΙΙ only) FF19D-21 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

13

1

23

XR-A770

3. SCHEMATIC DIAGRAM

3.1 OVERALL WIRING DIAGRAM

4

A

FM/AM TUNER MODULE (AXQ7068)

B

SERVO MECHANISM ASSY (AXA7039)

CN8001 CN8002

B

CD ASSY(XWZ3141)

E

AF ASSY (XWZ3120)

C

E

1/3

E

3/3

I

DISPLAY ASSY (XWZ3123)

D

DECK MECHA

14

SUB DISPLAY ASSY

K

(XWZ3112)

1234

5

678

XR-A770

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

C

MOTOR ASSY (AWZ8428)

SW ASSY

D

(AWZ8429)

CN8003

REAR AMP ASSY

L

(XWZ3122)

A

B

CD SW LED

J

ASSY (XWZ3131)

F

SECONDARY ASSY (XWZ3121)

SUB TRANS

H

ASSY (XWZ3139)

G

PRIMARY ASSY (XWZ3152)

C

D

15

5

6

7

8

1

23

XR-A770

3.2 FM/AM TUNER MODULE

4

A

RF AMP

OSC

B

MIX AMP

BUFFER

IF AMP

FM +B SW

C

AM RF TUNING BLOCK

PLL

D

FM/AM TUNER MODULE

A

(AXQ7068)

16

A

1234

5

678

XR-A770

A

AF AMP

B

CN3051

2/3

E

AF AMP

REGULATOR

C

D

A

5

6

7

8

17

1

23

XR-A770

3.3 CD, MOTOR and SW ASSEMBLIES

A

B

4

56k

R8123

C

CD ASSY

B

(XWZ3141)

MOTOR ASSY

C

(AWZ8428)

CARRIAGE MOTOR

D

18

B C

J8502

SERVO MECHANISM ASSY AXA7039

1234

D20PWW0405E

5

678

XR-A770

Note: The encircled numbers denote measuring point in the

1

2

schematic diagram.

CN8005- Pin 1 :

1

PLAY MODE (RF)

H : 500nsec/div

1.8Vp-p

A

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

2/3E

J8502

C8257

0.1

C8256 0.1

D

C8255 0.1

2SB1237X 2SB1237X

2SD1858X

0.047

2SD1858X

C

D

SW ASSY (AWZ8429)

B D

5

6

7

8

19

1

XR-A770

3.4 AF ASSY (1/3)

A

E

1/3

AF ASSY (XWZ3120)

B

(PB)

: DECK PB SIGNAL ROUTE

(REC)

: DECK REC SIGNAL ROUTE

23

(REC) (REC)

22k 22k

(PB)

(REC)

4

(PB)

(REC)

(PB)

(REC)

(PB)

(REC)

(PB)

47p

0.022

C2323

0.022

C

220k

33k

220k

D

0.01

20

E

1/3

1234

5

678

XR-A770

IC2101(2/2)

BA4558F–HT

A

(PB)

(REC)

IC2101(1/2)

BA4558F–HT

(REC)

(PB)

(PB) (PB)

(PB)

(REC)

22k

(REC)

(PB)

(REC)

E

2/3

B

2/3

E

2/3

E

1/3

E

5

6

7

8

21

C

D

1

XR-A770

3.5 AF ASSY (2/3)

23

CN8004

B

4

A

(TA)

(CD)

XKB3002

(TA)

(PB)

(CD)

(CD)(CD)

(TA)

R3019,R3020 XR-A880 : 1.8k XR-A770 : 3.9k

(S/T)

(F/W)

(C) (B)

3/3

E

(S/T)(S/T)

BA4558F-HT

(B)

(TA)

(C)

(B)(B)

(B)

B

(CD)

(PB)

(C)

(C) (C)

(F/W)

(S/T)

(B)

(S/T)

(C)

(B) (B)

(T)

(B) (B)

(B)

C

BA4558F-HT

(F/W)

(F/W) (F/W)

(T)

(PB)(PB)

(PB) (PB)

(PB)

1.8k

680k

BA4558F-HT

22p

1

150k

(T)

D

22

CN5501

I

CN83

H

2/3

E

1234