Pioneer PDM-427 Service manual

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MULTI COMPACT DISC PLAYER

STANDBY/ON

-DISC

MULTI CD

6



'

EJECT REPEAT PROGRAM DISC

0

DISC TRACK MIN SEC

TRACK/MANUAL

41 ¢¡

RANDOM

1-BIT¥DLC

STOP PLAY/PAUSE

7

DIRECT LINEAR CONVERSION

HI—LITE

6

MULTI COMPACT DISC PLAYER

PD-M427

PD-M407

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

ORDER NO.

RRV2122

Type Power Requirement

Model

PD-M427 PD-M407

WPWXJ ‡ ‡ AC220–240V –––––––

RDXJ ‡ ‡ AC110–127V/220–240V With the voltage selector

The voltage can be converted by
the following method.

CONTENTS

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

2. EXPLODED VIEWS AND PARTS LIST .............4

3. SCHEMATIC DIAGRAM................................... 10

4. PCB CONNECTION DIAGRAM .......................14

5. PCB PARTS LIST.............................................18

6. ADJUSTMENT.................................................. 21

7. GENERAL INFORMATION .............................. 29

7.1 DISPLAY ....................................................29

7.2 BLOCK DIAGRAM...................................... 30

8. PANEL FACILITIES AND SPECIFICATIONS

...................................................................31

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 1999

T–ZZR APR. 1999 Printed in Japan

PD-M427, PD-M407

1. SAFETY INFORMATION

This service manual is intended for qualified service technicians; it is not meant for the casual
do-it-yourselfer. 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.

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

LASER DIODE CHARACTERISTICS
MAXIMUM OUTPUT POWER: 5 mw
WAVELENGTH: 780 – 785 nm

LABEL CHECK

IMPORTANT

REAR

Additional Laser Caution

1. Laser Interlock Mechanism
The ON/OFF (ON: low level, OFF: high level)
status of S601 (LPS1) and S602 (LPS2)
switches for detecting the loading state is
detected by the system microprocessor, and
the design prevents laser diode oscillation
except when both switches S601 and S602
are ON (low level or clamped state).
Thus, interlock will no longer function if
switches S601 (LPS1) and S602 (LPS2) are
deliberatery shorted (low level). The interlock
also does not function in the test mode

∗.

Laser diode oscillation will continue, if pin 33
of CXA1782CQ (IC151) on the MOTHER
BOARD ASSY is connected to GND, or pin
50 of IC351 (LDON) is connected to low level
(ON), or else the terminals of Q151 are shorted
to each other (fault condition).

WPWXJ type Only

2. When the cover is opened with the servo
mechanism block removed to be turned over,
close viewing of the objective lens with the
naked eye will cause exposure to a Class 1
laser beam.

∗ Refer to page 22.

2

PD-M427, PD-M407

3

PD-M427, PD-407

2. EXPLODED VIEWS AND PARTS LIST

NOTES : ÷ Parts marked by “ NSP ” are generally unavailable because they are not in our Master Spare Parts List.

÷ The

÷ Screw adjacent to ∞ mark on the product are used for disassembly.

2.1 PACKING

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.

1

2

7

10

REAR

12

6

3

4

11

8

5

9

4

(1) PACKING PARTS LIST

Mark No. Description Parts No.

1 Control Cable (for SR) (L=1 m) See Contrast table (2)
2 Output Cable (L=1 m) PDE1248

(for AUDIO)

3 Remote Control Unit See Contrast table (2)

(CU-PD104)
4 Battery Cover See Contrast table (2)
5 6-Compact Disc Magazine PXA1617

6 Operating Instructions See Contrast table (2)
7 Styrol Protector (F) PHA1276
8 Styrol Protector (R) PHA1277
9 CD Packing Case See Contrast table (2)

10 Mirror Mat Sheet Z23–007

(750X600X0.5)

NSP 11 Dry Cell Battery (AAA/R03) See Contrast table (2)

12 Caution 220V Label See Contrast table (2)

PD-M427, PD-M407

(2) CONTRAST TABLE

PD-M427/WPWXJ, RDXJ, PD-M407/WPWXJ and RDXJ are constructed the same except for the following:

Part No.

Mark Remarks

No. PD-M427 PD-M407

Symbol and Description

WPWXJ RDXJ WPWXJ RDXJ

1 Control Cable (for SR) (L=1 m) Not used PDE1247 PDE1247 PDE1247
3 Remote Control Unit (CU-PD104) PWW1149 PWW1149 Not used Not used
4 Battery Cover PZN1010 PZN1010 Not used Not used
6 Operating Instructions (English) PRB1288 Not used PRB1288 Not used
6 Operating Instructions Not used PRE1281 Not used PRE1281

(English/Spanish/Chinese)

9 CD Packing Case PHG2373 PHG2373 PHG2371 PHG2371

NSP 11 Dry Cell Battery (AAA/R03) VEM-022 VEM-022 Not used Not used

12 Caution 220V Label Not used ARR1003 Not used ARR1003

5

PD-M427, PD-407

2.2 EXTERIOR

24

22

5

(Refer to "2.3 MULTI

MECHANISM ASSY".)

28

7

21

24

7

17

25

F

29

7

34

34

20

27

3

21

22

25
17

21

32

WPWXJ
type only

1

4

22

11

22

23

30

12

9

31

2

22

16

18

14

F

8

15

8

23

33

6

19

10

22

26

6

6

(1) EXTERIOR PARTS LIST

Mark No. Description Parts No.

1 Strain Relief CM–22B
2 F.F.C/30V See Contrast table (2)
3 Power Transformer See Contrast table (2)
4 AC Power Cord See Contrast table (2)
5 Bonnet PYY1149

PD-M427, PD-M407

Mark No. Description Parts No.

21 Screw BBZ30P060FMC
22 Screw BBZ30P080FZK
23 Screw PPZ30P120FMC
24 Screw FBT40P080FZK
25 Screw PDZ30P050FMC

6 Foot Assy AEC1531
7 Screw IBZ30P080FCC
8 Rubber Sheet AEB1111
9 Function Panel See Contrast table (2)

10 Play Button PAC1766

11 Name Plate PAM1776
12 Power Button PAC1719
13 …………………
14 Track Button PAC1765
15 Display Window See Contrast table (2)

16 Spring (Door) PBH1022

NSP 17 Earth Lead Unit DE007VF0

18 Door PNW2598
19 FUNCTION BOARD Assy See Contrast table (2)
20 MOTHER BOARD Assy See Contrast table (2)

NSP 26 Under Base PNA1751

27 Rear Base See Contrast table (2)

NSP 28 Multi Mechanism Assy PXA1592

29 Flat Cable (6P) D20PYY0615E

NSP 30 SW BOARD Assy PWZ2805

31 LED Lens PNW2019
32 Caution Label See Contrast table (2)

NSP 33 Locking Card Spacer PEC1036

34 Binder ZCA-SKB90BK

(2) CONTRAST TABLE

PD-M427/WPWXJ, RDXJ, PD-M407/WPWXJ and RDXJ are constructed the same except for the following:

Part No.

Mark

No. PD-M427 PD-M407

Symbol and Description

WPWXJ RDXJ WPWXJ RDXJ

2 32P F · F · C/30V PDD1041 PDD1041 Not used Not used
2 30P F · F · C/30V Not used Not used PDD1049 PDD1049
3 Power Transformer PTT1236 PTT1238 PTT1236 PTT1238
4 AC Power Cord ADG1123 PDG1013 ADG1123 PDG1013
9 Function Panel PNW2913 PNW2913 PNW2912 PNW2912

Remarks

15 Display Window PAM1798 PAM1798 PAM1797 PAM1797
19 FUNCTION BOARD ASSY PWZ2769 PWZ2769 PWZ2768 PWZ2768
20 MOTHER BOARD ASSY PWM2156 PNW2155 PNW2153 PNW2152
27 Rear Base PNA2501 PNA2500 PNA2499 PNA2498
32 Caution Label PRW1018 Not used PRW1018 Not used

7

PD-M427, PD-407

2.3 MULTI MECHANISM ASSY

38

75

59

1

37

9

7

5

35

40

38

26

25

17

40

4

40

63

∗1 Label

Fix the motor (No. 59)
on the gear holder (No.

2) so that the label
attached on the motor
faces the direction

39

illustrated.

2

18

21

16

19

42

20

41

13

17

24
23

24
22

14

79

Red Mark

57

49

38

85

56

73

82

39

54

53

Red

Mark

72

74

87

50
80

84

78

51

69

68

70

83
43

61

58

52

62

24
22

24
23

71

55

83

3

48

86

66

38

28

30

29

47

46

47

60

38

12

11

38

6

45

44

38

10

67

36

59
1

7

37

5

40

31

15

∗2 Label

8

9

38

33

27

32

76

77

64

47

46

47

*2: Fix the motor (No. 59)
on the top guide N (No. 6)
so that the label attached on
the motor faces the direction
illustrated.

8

65

34

PD-M427, PD-M407

Spacer

Spacer

FFC Holder M

(Pressure of about 9 kg)

Disc Table

1.2mm

6.9mm

0.9mm
±0.05mm

Yoke M

Spindle Motor

Carriage Base

Stopper

Spacer Setting
Position

2

1

1 Use nipper or other tool to cut the three sections marked

A in figure 1. Then remove the spacer

2 While supporting the spindle motor shaft with the

stopper, put spacer on top of the yoke M, and stick the
disc table on top (takes about 9kg pressure). Detach the
spacer.

¶

How to Install the Disc Table

A

A

MULTI MECHANISM ASSY PARTS LIST

Mark No. Description Parts No. Mark No. Description Parts No.

1 Motor Pulley PNW1634
2 Gear Holder PNW1929
3 PU PWB (POLYIMDE) PNP1442
4 Cam Gear PNW1923
5 Belt PEB1138

6 Top Guide N PNW2441
7 Gear Pulley PNW1918
8 Gear S PNW1919
9 Gear L PNW1920

10 Eject Spring PBH1107
11 SW Lever PNW1927

12 Seven Bar PNW1931
13 Sub Revolving Lever PNW1933
14 Sub Revolving Lever Spring PBH1111
15 Revolving Lever PNW1932

16 Drive Plate PNW1930
17 Motor Screw PBA–112
18 Holder Lever Spring PBH1110
19 Disc Holder PNW1924
20 Cushion A PED1001

21 Holder Lever PNW1925
22 Float Rubber PEB1014
23 Float Rubber PEB1132
24 Float Screw PBA1073
25 Release Lever PNW1934

26 Release Spring PBH1106
27 Clamper Cam PNW1922
28 Clamper Holder PNW1921
29 Centering Spring PBH1109
30 Clamper PNW2774

31 Lock Lever PNW1917
32 Lock Spring PBH1108
33 Stair NL PNW2443
34 Stair NR PNW2444
35 Synchronize Lever PNW1926

56 Carriage Base PNW2699
57 D.C. Motor Assy PEA1235

(Spindle with oil)
58 Pickup Assy PEA1335
59 Carriage Motor VXM1033
60 Eject Lever PNB1306

61 Upper Chassis PNB1267

NSP 62 Servo Mechanism Assy M PXA1595
NSP 63 LOADING BOARD Assy PWZ2038

64 Sub Chassis N PNW2440
65 Main Chassis PNW2074

NSP 66 SELECT BOARD Assy PWZ2533
NSP 67 MOTOR BOARD Assy PWZ2040

68 Disc Table Assy PEA1035
69 Screw BBZ26P060FMC
70 Screw BPZ20P060FMC

71 Screw BPZ26P100FMC
72 Screw JFZ17P025FZK
73 Screw JFZ20P040FMC
74 Washer WT12D032D025
75 Connector Assy PDE1241

76 Stopper Spring PBH1131
77 Stopper PNW2069
78 D.C. Motor Assy (CARRIAGE) PEA1246

NSP 79 MECHANISM BOARD Assy PWX1192

80 Clamp Magnet PMF1014
81 …………………

82 Connector Assy PDE1240

NSP 83 Earth Lead Unit PDF1118

84 Gear Stopper PNB1303
85 Yoke M PNB1312

86 Rack Holder PNW2056
87 Carriage DC Motor PXM1027

36 Motor Assy PEA1130

(LOADING, DISC SELECT)
37 Screw PMZ26P040FMC
38 Screw PPZ30P080FMC
39 Screw BBZ30P060FMC
40 Washer WT26D047D025

41 Washer WA31D054D025
42 E Ring Z39–010
43 Screw IPZ30P080FMC
44 Spacer (Rubber) PEB1238
45 Spacer (Rubber) PEB1179

46 Silent Ring PBK1093
47 Washer WA62D130D025
48 Rack Spring PBH1128
49 Guide Bar PLA1094
50 Disc Table PNW1067

51 Gear 1 PNW2052
52 Gear 2 PNW2053
53 Gear 3 PNW2054
54 Pinion Gear PNW2055
55 FFC Holder M PNW2746

9