Pioneer PD-M423 User manual

d) PIONEER’
The Art of Entertainment
Service
anual
MULTI-PLAY COMPACT DISC PLAYER
PD-M423
PD-M403
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
Type Power Requirement
ORDER NO.
RRV1062
CONTENTS
1. SAFETY INFORMATION -oescccsssccceeeeseeseetsseeeeeeees 2
2. PACKING AND PARTS LIST -ecccccrcessereeeeeeetrereeees 3
3. EXPLODED VIEWS AND PARTS LIST ----------+--++-- 4
4. BLOCK DIAGRAM ceccecceeecececetseessttaeeceeeneeeseneens 10
5. SCHEMATIC DIAGRAMGccrsrccereessesrrreeceeeeeeeeesenes 1
6. PCB CONNECTION DIAGRAM -:+-sseseceececeeeeeeeeees 17
7. PCBPARTS LIST --:::s::ccccccccceteeeeeeeeeeseesseeseeeeees 23
8. ADJUSTMENTS cvrvcrsccercrsesteeccsecttennseteeeeeeesoesens 25
9. IC INFORMATION eee ee eee eee rere rere ree ee eee rere 34
10. FL INFORMATION «++:-::seseeeeessereeeeeeeessssseessnenees 39
11, FOR PD-M423/KCXJ, PD-M403/KUXJ
AND KOXJ stcccsessscceceeeeteceeseetsensessssnerseeeeeeereenens 40
12. PANEL FACILITIES +--:::::::sssccesececesessesssnseeenseeees a4
13. SPECIFICATIONS r--:eeeeeeeeseeeeeeeeeeeessnseseeneeeeees 42
PIONEER ELECTRONIC CORPORATION 4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153, Japan
PIONEER ELECTRONICS SERVICE INC. P.O. Box 1760, Long Beach, California 90801 U.S.A.
PIONEER ELECTRONICS OF CANADA, INC. 300 Allstate Parkway Markham, Ontario L3R OP2 Canada
PIONEER ELECTRONIC [EUROPE] N.V. Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS AUSTRALIA PTY. LTD. 178-184 Boundary Road, Braeside, Victoria 3195, Australia TEL: [03] 580-9911
© PIONEER ELECTRONIC CORPORATION 1994
T - SSF FEB. 1994 Printed in Japan®

PD-M423, PD-M403
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.
WARNING
Lead in solder used in this product is listed by the California Health and Welfare agency as a known reproductive toxicant which
may cause birth defects or other reproductive harm (California Health & Safety Code, Section 25249.5).
When servicing or handling circuit boards and other components which contain lead in solder, avoid unprotected skin contact with
the solder. Also, when soldering do not inhale any smoke or fumes produced.
NOTICE
(FOR CANADIAN MODEL ONLY)
Fuse symbols -§&—1 (fast operating fuse) and/or -§—— (slow operating fuse) on PCB indicate that replacement parts
must be of identical designation.
REMARQUE
(POUR MODELE CANADIEN SEULEMENT)
Les symboles de fusible -§—H (fusible de type rapide) et/ou -§£— (fusible de type lent) sur CCI indiquent que les
piéces de remplacement doivent avoir la méme 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
ANY MEASUREMENTS NOT WITHIN THE LIMITS
OUTLINED ABOVE ARE INDICATIVE OF A PO-
TENTIAL SHOCK HAZARD AND MUST BE COR-
RECTED BEFORE RETURNING THE APPLIANCE TO
THE CUSTOMER.
2.PRODUCT SAFETY NOTICE
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, contro! 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
Leakage | Ot be above
current | 0.5mA
tester
Sd
Test all
exposed metal
surfaces
Also test with
plug reversed
(Using AC adapter
plug as required)
Earth
ground
AC Leakage Test
Many electrical and mechanical parts in the appli-
ance have special safety related characteristics. These
are often not evident from visual inspection nor the
protection afforded by them necessarily can be ob-
tained by using replacement components rated for vol-
tage, 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 A on the schematics and
on the parts list in this Service Manual.
The use of a substitute replacement component which
dose 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
PItONEER Service Manual. A subscription to, or ad-
ditional copies of, PIONEER Service Manuai may be
obtained at a nominal charge from PIONEER.

PD-M423, PD-M403
2. PACKING AND PARTS LIST
NOTES:
e Parts marked by “NSP” are generally unavailable because they are not in our Master Spare Parts List.
e The A\ 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.
Parts marked by “@” are not always kept in stock. Their delivery time may be longer than usual or they may be unavailable.
Parts List
Mark No. Description Part No. Mark No. Description Part No.
1 Connection Cord with PDE — 319 9 CD Packing Case PHG1999
Mini Plug (for SR cord) 10 Mirror Mat Sheet Z23 — 007
2 Connection Cord with PDE1109
Pin Plug (for Audio) NSP 101. Dry Cell Battery VEM — 022
3 Remote Control Unit PWW1089 (RO3, AAA)
4 Battery Cover PZN1010
5 Magazine Assy PXA1523
6 Operating Instructions PRB1205
(English)
7 Styrol Protector (F) PHA1276
8 Styrol Protector (R) PHA1277 2

PD-M423, PD-M403
3. EXPLODED VIEWS AND PARTS LIST
NOTES:
e Parts marked by “NSP” are generally unavailable because they are not in our Master Spare Parts List.
¢ The A\ 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.
Parts marked by “©” are not always kept in stock. Their delivery time may be longer than usual or they may be unavailable.
3.1 EXTERIOR
Parts List
Mark No. Description
A Strain Relief
2 32P F.F.C/30V
A 3 Power Transformer
A 4 Power Cord with Plug
5 Bonnet
6 Foot Assy
7 Screw
8 Rubber Sheet
9 Function Panel
10 Play Button
11 Name Plate
12 Power Button
13 65 Label
14 Track Button
15 Display Window
16 Spring (Door)
17 Earth Lead Unit
18 Door
19 Function Board Assy
A 20 Mother Board Assy
21 Screw
22 Screw
23 «Screw
24 Screw
25 earees
96) osevade
27 Screw
28 Screw
Part No.
CM — 22C
PDD1041
PTT1237
PDG1015
PYY1149
AEC1531
IBZ30PO080FCC
AEBI111
PNW2387
PAC1766
PAM1608
PAC1719
ORW 1069
PAC1765
PAM1635
PBH1022
XDF — 502
PNW2264
PWZ2769
PWM1858
BBZ30P060F MC
BBZ30P080FZK
PPZ30P120FMC
FBT40P080FZK
IBZ30P180FMC
PDZ30P050F MC
Mark No.
NSP 101
NSP 102
NSP 103
NSP 104
NSP 105
NSP 106
Description Part No.
PCB Mould AMR1525
Under Base PNA1751
Rear Base PNA2068
Multi Mechanism Assy PXA1532
Flat Cable (6P) D20PY YO615E
Switch Board Assy PWZ2804

PD-M423, PD-M403
Exterior
NOTE:
Screws
adjacent
to
V
mark
on
the
product
are
used
for
disassembly.
Multi Mechanism Assy
(= See section 3.2)

PD-M423, PD-M403 | ° ° ‘ : : °
3.2
MULTI
MECHANISM
ASSY
2
*1: Fix the motor 101 on the loading board assembly 105 so that
the label attached on the motor faces the direction illustrated. _~°
2
*1 Label
A
=
*2: Fix the motor 101 on the motor board
10 assembly 110 so that the label
attached on the motor faces the
direction illustrated.
B
=
C
=
© How to install the disc table
(0) Usenippers or other tool tocut the three sections
marked ® and the three sections marked ® in
figure. Then remove the spacer.
[2] While supporting the spindle motor shaft with
the stopper, put spacer on top of yoke M, and
stick the disc table on top (takes about 9kg press-
ure). Detach the spacer.
D

PD-M423, PD-M403
Parts List
Mark No. Description Part No. Mark No. Description Part No.
1 Motor Pulley PNW 1634 49 Guide Bar PLA1094
2 Gear Holder PNW1929 50 __ Disc Table PNW 1067
3 PU Frexible Cable PNP1343 51 Gearl PNW2052
4 Cam Gear PNW1923 52 Gear2 PNW2053
5 Belt PEB1138 53 Gear3 PNW2054
6 Top Guide N PNW 2441 54 Pinion Gear PNW2055
7 ~~ Gear Pulley PNW1918 55 PWB Holder PNW2057
8 GearS PNW1919 56 Carriage Base PNW2445
9 GearL PNW1920 57 D.C. Motor Assy PEA1235
10 Eject Spring PBH1107 (spindle with oil)
11 Switch Lever PNW1927 58 Pickup Assy PEA1291
12 Seven Bar PNW1931 59 Disc Table Assy PEA1035
13. Sub Rotary Lever PNW 1933 60 Screw BBZ26P060FMC
14 Sub Rotary Lever Spring PBH1111 61 Screw BPZ20PO60FMC
15 Rotary Lever PNW1932 62 Screw BPZ26P100FMC
16 Drive Plate PNW1930 63 Screw JFZ17P025FZK
17. Motor Screw PBA- 112 64 Screw JFZ20P040FMC
18 Holder Lever Spring PBH1110 65 Washer WT12D032D025
19 Disc Holder PNW1924 66 Connector Assy PDE1241
20 Cushion A PED1001 67 Stopper Spring PBH1131
21 ~Holder Lever PNW1925 68 Stopper PNW2069
22 Float Rubber PEB1014 69 D.C. Motor Assy PEA1246
23 + Float Rubber PEB1132 (CARRIAGE)
24 ~~ ‘Float Screw PBA1073 70 Upper Chassis PNB1267
25 Release Lever PNW1934 71 Sub Chassis PNW2440
72 Connector Assy PDE1240
26 Release Spring PBH1106
27. ~=Clamper Cam PNW1922
28 Clamper Holder PNW1921
29 ~Clamper Spring PBH1109
30 Clamper PNW1857
NSP 101 Motor VXM1033
31 Lock Lever PNW1917 NSP 102 Eject Lever PNB1306
32 Lock Spring PBH1108 103 eee
33 Stair NL PNW2443 NSP 104 Servomechanism Assy M PXA1512
34 Stair NR PNW2444
35 Synchronize Lever PNW1926 NSP 105 Loading Board Assy PWZ2038
106 eovovee
36 Motor Assy PEA1130 107 «eee8
(LOADING, DISC SELECT) NSP 108 Main Chassis PNW2074
37. Screw PMZ26P040FMC NSP 109 Select Board Assy PWZ2533
38 Screw PPZ30PO080FMC
39 Screw BBZ30P060FMC NSP 110 Motor Board Assy PWZ2040
NSP 111 Mechanism Board Assy PWX1192
40 Washer WT26D047D025 NSP 112 Earth Lead Unit PDF1074
41 Washer WA31D054D025 NSP 113 Clamp Magnet PMF1014
42 ERing Z39-010 NSP 114 Gear Stopper PNB1303
43 Screw IPZ30PO80FMC
NSP 1t1S YokeM PNB1312
44 Rubber Spacer PEB1238 NSP 116 AVAngle PNB1405
45 Rubber Spacer PEB1179 NSP 117 Carriage DC Motor/0.3W PXMI1027
46 Silent Ring PBK1093
47 Washer WA62D130D025
48 Earth Spring PBH1132

PD-M423, PD-M403
BLOCK DIAGRAM 4.
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5. SCHEMATIC DIAGRAM
5.1 Waveforms
*1 SOT- JUMP:After switching to the pause mode, press the
Note: The encircled numbers denote measuring points in the
schematic diagram.
TP1- Pin 1:PLAY MODE
(2) (RF)
500mVidiv SO0Onsec/div
TP1- Pin 1: TRACK SEARCH MODE
(RF)
500mV/div 200 yu sec/div
2.600028 88)
TP1- Pin 6:PLAY MODE
(3) (FOER)
100mV/div 1Omsec/div
TP1-Pin 2:PLAY MODE
(TRER)
WVidiv 10msec/div
TP1- Pin 2:50T- JUMP (*1) MODE
(TRER)
1Vidiv 1msec/div
manual search key.
*2 FOCUS - IN:Press the key without loading a disc.
IC202- Pin 3 :FOCUS - IN (*2) MODE
(FODR)
1Vidiv 200msec/div
IC202- Pin 3 :PLAY MODE
(FODR)
1Vidiv 1msec/div
IC202- Pin 4:PLAY MODE
6) (TRDR)
500mVidiv
1msec/div
1C202- Pin 4:50T - JUMP (*1) MODE
(TRDR)
500mVidiv 1msec/div
IC201- Pin 9:PLAY MODE
7) (SPDR)
1Vidiv 50Omsec/div
IC201 - Pin 8: TRACK SEARCH MODE
(SPDR)
2Vidiv 50msec/div
IC202- Ping :PLAY MODE
(CADR)
0.5Vidiv 2sec/div
1C202- Ping : TRACK SEARCH MODE
(CADR)
2V/div 200msec/div
1C151-Pin 32:PLAY MODE
(EFM)
2Vidiv 500nsec/div
1C401-Pin 7 :PLAY MODE (1kHz)
(LO ) (D/A DATA OUT)
1V/div 200 psec/div
1C401-Pin 8 :PLAY MODE (1kHz)
(1) (LO ) (D/A DATA OUT)
div 200 i 1V sec/div
1C301-Pin 22 :PLAY MODE (1kHz)
(BCLK)
2V/div 500nsec/div
(aa al ol eel cael a coe el oo
ey
1C301-Pin 20 :PLAY MODE (1kHz)
(LRCK)
2Vidiv 10 usec/div
1C301-Pin 21 :-PLAY MODE (1kHz)
(PCMD)
2V/idiv 5O0Onsec/div
Pin- OUTPUT:PLAY MODE(1kHz)
1Vidiv 200 usec/div
STRACK SEARCH MODE
Upper: TP1- Pin 1 (RF) 1V/div
Lower: IC 151- Pin 29 (MIRR)
2Vidiv 200 usec/div
eee tee eee
t
:PLAY MODE
Upper: TP1- Pin 1 (RF) 1V/div
Lower: 1C151- Pin 30 (DFCT)
SVidiv 200 usec/div
1C301-Pin 3 :PLAY MODE
3) (MDP)
2Vidiv 2 usec/div
(Upper)
— GND
~— GND
(Lower)
!1C301-Pin 9 ;:PLAY MODE
(PCO)
2Vidiv 10 usec/div
NOTE FOR SCHEMATIC DIAGRAMS (Type 4A)
1.
When ordering service parts, be sure to refer to
“PARTS LIST of EXPLODED VIEWS” or “PCB
PARTS LIST”.
. Since these are basic circuits, some parts of them or the
values of some components may be changed for improve-
ment.
. RESISTORS:
Unit: k:kQ, M:MQ, or 9 unless otherwise noted.
Rated power: 1/4W, 1/6W, 1/8W, 1/10W unless otherwise
noted.
Tolerance: (F): +1%, (G): +2%, (K): +10%, (M): +20% or +5% un-
less otherwise noted.
. CAPACITORS:
Unit: p:pF or wF unless otherwise noted.
Ratings: capacitor (uF)/ voltage (V) unless otherwise noted.
Rated voltage: 50V except for electrolytic capacitors.
. COILS:
Unit: m:mH or wH unless otherwise noted.
. VOLTAGE AND CURRENT:
LoJor-v:
DC voitage (V) in PLAY mode unless otherwise noted.
© mA or+ mA:
DC current in PLAY mode unless otherwise noted.
Value in( ) is DC current in STOP mode.
OTHERS:
© @or®@ : Adjusting point.
© <<]: Measurement point.
© The A mark found on some component parts indicates the im-
portance of the safety factor of the parts. Therefore, when re-
placing, be sure to use parts of identical designation.
- SCH—O ON THE SCHEMATIC DIAGRAM:
e SCH—D indicates the drawing number of the schematic dia-
gram. (SCH stands for schematic diagram.)
- SWITCHES (Underline indicates switch position):
FUNCTION BOARD ASSY
S701: EJECT
S702 : REPEAT
S703. : PROGRAM
S704: DISC
S705: kKKI- <j
S706: b> - Dot
S707 : STOP
s7os : >/(0
S709 : RANDOM
S710 : HI-LITE SCAN
SWITCH BOARD ASSY
S80t : POWER
PD-M423, PD-M403
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