Pioneer PD-S904 User manual

Y PIONEER’
The Art of Entertainment
Service
Manual
COMPACT DISC PLAYER
PD-S904
PD-S904-G
THIS
MANUAL
IS
APPLICABLE
TO
THE
FOLLOWING
MODEL(S)
AND
TYPE(S).
Type
ae
Power
Requirement
The
voltage
can
be
converted
by
following
method.
Se
oe
Trew
[Oo
|
0
[acem=zov
ican
awe
a
SO
|
,
ee
eee
ORDER NO.
RRV1284
AC220 — 230V/230 — 240V With the voltage selector
AC110V/120 ~ 127V/220V/240V With the voltage selector
*
:
Alter
the
wiring
of
the
Power-supply
block
at
the
primary
winding
of
power
transformer
referring
to
the
“Line
Voltage
Selection”
described
in
Service
Manual.
CONTENTS
1. SAFETY INFORMATION .....0000 cee teeters 2
2. EXPLODED VIEWS, PACKING AND PARTS LIST ..4
3, DISASSEMBLY te.sceciec ccc ccietee ie neetiensvedind 10
4. SCHEMATIC AND PCB CONNECTION
DIAGRAMS esccs.cs ven ti Nasa tthe pains 11
5: “PCB PARTSUST 2.25030. cei eli ate. 25
6. IC INFORMATION ..0000. cee eeteetetees 28
7. FLINFORMATION 0.0000... reecntees 30
8. ADJUSTMENTS ...00000.0.0.c cece cececete ete ceeneeeesees 31
9. FOR PD-S904/HEM, HL, SD
AND PD-S904-G/HEM ........ eee ce tereeeeee 36
10. PANEL FACILITIES oo... ee eet ereeterteeee 38
11. -SPECIFICATIONS : 25013 ci dae ees 39
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
Keetbergiaan
1,
9120
Melsele,
Belgium
PIONEER
ELECTRONICS
AUSTRALIA
PTY. LTD.
178-184
Boundary
Road,
Braeside,
Victoria
3195,
Australia
TEL
:
103]
580-9911
©
PIONEER
ELECTRONIC
CORPORATION
1995
asteit
T-SSG
ARP.
1995
Princ
in
Japan

PD-S904, PD-S904-G
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 -§—# (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 -E—B (fusible de type rapide) eVou -$E=8 (fusible de type lent) sur CCI indiquent que les
piaces 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
current tester such as Simpson Model 229-2 or
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
Leakage | NOt be above
0.5mA
current
tester
Device
under
test
Test all
exposed metal
surfaces
Also test with
plug reversed
(Using AC adapter
plug as required)
Earth
ground
AC Leakage Test
equivalent between the earth ground and all exposed.
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
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
PIONEER Service Manual. A subscription to, or ad-
ditional copies of, PIONEER Service Manual may be
obtained at a nominal charge from PIONEER.

(FOR EUROPEAN MODEL ONLY)
VARO!
AVATTAESSA JA SUOJALUKITUS
OHITETTAESSA OLET ALTTIINA
NAKYMATTOMALLE LASERSATEILYLLE.
ALA KATSO SATEESEEN.
r—-ADVERSEL:
USYNLIG LASERSTRALING VED ABNING
NAR SIKKERHEDSAFBRYDERE ER UDE AF
FUNKTION UNDGA UDSAETTELSE FOR
STRALING.
r- VARNING!
OSYNLIG LASERSTRALNING NAR DENNA
DEL AR OPPNAD OCH SPARREN
AR URKOPPLAD. BETRAKTA EJ STRALEN.
LABEL CHECK
HBW, HL and HEM types
CLASS 1
LASER PRODUCT
VRW-328
LASER
Kuva 1
Lasersateilyn
varoitusmerkki
PD-S904, PD-S904-G
WARNING!
DEVICE INCLUDES LASER DIODE WHICH
EMITS INVISIBLE INFRARED RADIATION
WHICH IS DANGEROUS TO EYES. THERE IS
A WARNING SIGN ACCORDING TO PICTURE
1 INSIDE THE DEVICE CLOSE TO THE LASER LASER
DIODE. Picture 1
Warning sign for
laser radiation
IMPORTANT
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
HEM type
VARO!
Avattaessa ja suojalukitus ohitetta-
essa olet alttiina n&dkynattondlie
lasersateilylle. Al& katso séteeseen.
VARNING!
Osynlig laserstrdlning nar denna del
&r Oppnad och sparren dc urkopplad.
Betrakta oj strélen.
rip in anna nabs cig aoe
PRWA233
Additional Laser Caution
1. Laser Interlock Mechanism
The position of the switch (S601) for detecting loading
completion is detected by the system microprocessor, and
the design prevents laser diode oscillation when the
switch (S601) is not CLMP terminal side (wher CLMP
signal is OFF, that is, high level).
Thus, the interlock will no longer function if the switch
(S601) is deliberately set to CLMP terminal side if <CLMP
signal is low level).
In the test mode *, the interlock mechanism will not
function.
Laser diode oscillation will continue, if pin 1 of MS1593FP
( [C101 ) on the preamplifier board loaded on pickup
assembly are connected to GND, or pin 19 is contected to
low level ( ON ), or else the terminals of Q101 aresfnorted
to each other ( fault condition ).
REAR VIEW
ADVARSEL
USYNUIG LASERSTRALING VED ABNING NAR SIKKERHED SAF-
SRYDERE ER UDE AF FUNKTION.
UNOGA UOSATIELSE FOR STRALING.
VORSICHT!
CAUTION
INVISIBLE LASER
When the cover is opened with the servo meh anism
block removed to be turned over. close viewin, of the
objective lens with the naked eye will cause expouwre toa
Ciass 1 laser beam.
RADIATION WHEN OPEN,
AVOID EXPOSURE
TO BEAM PRW1018
HBW and HL types
UNSICHTBARE LASER-STRAHLUMG TRITT AUS, WENN DECKEL
(ODER KLAPPE GEOFFNET SST! NICHT DEM STRAHL AUSSE IZEN?
vRW 1054
HEM type
* : Refer to page 32.

oe ee ——n ————-
PD-S904, PD-S904-G
2. EXPLODED VIEWS, PACKING AND PARTS LIST
NOTES:
+ 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 parts. 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.
2.1 EXTERIOR SECTION AND PACKING (For PD-S904/HBW)
Parts List
Mark No. Description Parts No. Mark No. Description Parts No.
1 Front panel 9 PAN1320 46 «+e ee
2 Name plate VAM1032 47 «ees
3 Function panel 9 PNW2586 48. ++--s
4 Display window PAM1668 49 Cord clamper RNH-184
5 LED lens PNW2019 50 = Mirror mat sheet Z23-007
6 Power button 9 PAC1810 51 “*Viny! bag 221-013
7 AUDIO TRANS PW2Z2993 52 ~~ Cord with plug PDE1248
BOARD ASSY 53 Operating instructions PRB1228
8 Function button 78 PAC1744 (English)
NSP 9 SW BOARD ASSY PWZ3007 54 Remote control unit PWW1093
10 Screw PPZ30P150FMC 55 ‘Battery cover PZN1012
NSP 11 FUNCTION BOARD ASSY PWZ3003 56 —~ Protector F PHA1243
12 ‘Tray panel PAN1321 57 ‘Protector R PHA1253
13. Screw IBZ30P060FCC 58 CD packing case E9 PHG2136
14. Screw BBT30P080FCC NSP 59 Battery (R03, AAA) VEM-022
15 Caution label PRW1018 60 Earth spring A PBH1213
16 SERVO TRANS PW2Z2921 61 Earth spring B PBK1138
BOARD ASSY 62 Name plate holder PNW2591
17 Screw IBZ30P080FCC 63 Tray holder PNW2592
18 Insulator PNW2020 64 FL sheet white 9 PAM1682
19 Screw IBZ30P150FCC 65 Display panel PAN1309
20 Screw IBZ30P060FCC
NSP 66 Under cover PNB1536
NSP 21 LOADING MECHANISM PXA1521 67 Getter label PRW1410
ASSY TT 68 Binder ZCA-SKB90BK
22 Output button PAC1661 69 Earth plate PBK1090
23 = =Screw BBZ30P080FCC 70 ~—- Rivet RBM-003
24 Indicator lens PEA1206
25 0 verses 71 Cushion VEC1013
72 Caution label VRW-329
NSP 26 Under base PNA1973
Cy eee
NSP 28 COAXIAL OUTPUT PWZ2986
BOARD ASSY
29 =Screw FBT40P080FZK
80.0 wee eee
31 Bonnet PYY1175
NSP 32 Audio angle PNA1968
A 33 Fuse (T5A) PEK1003
A 34 Power transformer (AC220-230V) PTT 1242
A 35 Power transformer (AC220-230V) PTT 1245
36 Stopper PNM1134
37 PCB spacer PNY-404
38 MAIN BOARD ASSY PWZ2964
NSP 39 Cushion (3.5) PEB1110
NSP 40 PCB holder PNW2100
41 AUDIO BOARD ASSY PWZ2917
A 42 AC power cord PDG1055
A 43 Cord stopper CM-22B
44 Rear base B9 PNA2222
AB? 6 Saw 2

e Packing 52 e Exterior Section
Cord With Mini Plug. /
(SD and HL Types only) f 53
NOTE: Screws adjacent to W mark on the product
are
used
for
disassembly.
21
Loading
mechanism
assy
TT
(See
section
2.2)
PD-S904, PD-S904-G.
Wot te ee a ea HT]
i( Fuse holder i
; i A
I! ot il
! ‘
" Fuse(FU1) !
rer
HBW type only
VOLTAGE SW PCB assy
|
rs
|
Opt. angle |
38
20 C
ig
¢
Note : Tne stopper consist of the big ring
part and the small ring part.
If you stick the stopper to the leg, D
stick the big ring part to the front
lag, and the small ring part to the Be
tear leg.
GS) @e
(For the (For the
front leg) rear leg)

PD-S904, PD-S904-G
3

e
Packing
52
e
Exterior
Section
pains
tare
einer
a
|
Cord
With
Mini
Plug,
PONCE
OE
(aspen
ae
.
(SD
and
HL
Types
omy)
53
(
Fuse
holder
;
rau
i
!
NOTE: Screws adjacent to W mark on the product
are used for disassembly. by “tessomesencaasyit i i
(Seesecton2.2) 4.0 ER EE GE TTS =
Opt. angle
Note : The stopper consist of the big ring
D part and the small ring part.
If you stick the stopper to the leg, D
stick the big ring part to the front
leg, and the small ring part to the lee ie
tear leg.
{For the (For the
front feg) rear jeg)

PD-S904,
PD-S904-G
D
3

2.2 LOADING MECHANISM ASSY TT
PD-S904, PD-S904-G
Parts List
Mark
No.
Description
Parts
No.
Mark
No.
Description
Parts
No.
1
Lever
switch
(S601)
DSK1003
51
Binder
PEC-107
2
Float
screw
PBA1027
NSP
52
Servo
mechanism
PXA1479
3
Rubber
belt
PEB1186
assy
TT92
4
Motor
pulley
PNW1634
53
Stop
ring
YE20S
5
Driving
gear
PNW1196
54
Shaft
holder
PNB1382
eee
6 Synchronized lever PNW2168
7
~~
Gear
pulley
PNW1198
56
Screw
BPZ26PO060FMC
8
SW
head
PNW1999
57
Screw
BBZ26P060FMC
9
Float
base
PNW2000
NSP
58
Earth
lead
PDF
1148
10
Left
cam
PNW2001
59
Caution
label
PRW1244
60 Connector assy 4P PDE1238
11 ~~ - Right cam PNW2002
12.‘
Float
spring
PBH1120
61
Connector
assy
5P
PDE1243
13 Lock spring PBH1121
14 Float rubber PEB1014
15 = Table rubber sheet PEB1181
16 Tray PNW2003
17. =‘ Table guide PNW2004
18 Lock plate PNW2005
19 D.C. motor PXMi010
(0.75W, LOADING)
20 ~=Float rubber PEB1031
21 ~=—- Float rubber PEB1170
22 Screw BMZ26P040FMC
23 Screw IPZ26P060FCU
24 Screw IPZ20P080FMC
25 Turn table assy PEA1165
26 «eee
27 ~— Loading base PNW1995
NSP
28
~~‘
Table
shaft
holder
PXA1383
j
\l
the
disc
table
NSP
29
Turn
table
(AL)
PNR1035
*
How
to
install
the
disc
380 = Carriage D.C. motor (0.3W) PXM1027 Use nippers or other tool to cut the two sections
marked (A) in figure [1]. Then remove the spacer.
31 ‘Pinion gear PNW2005
32
D.C
motor
ass
PEA1236
:
‘
2
(SPINDLE, with oil) While supporting the spindle motor shaft with
33 Carriage base PNW2445 the stopper, put the spacer on top of the carriige base
34
Disc
table
PNW1067
: :
;
35
Serew
JF20P030FNI
and
stick
the
disc
table
on
top
(takes
about
9Kg
pressure).
36
Screw
JFZ17P025FZK
Take
off
the
spacer.
37 Gear 3 PNW2054
38 Gear 2 PNW2053
39 Washer WT12D032D025
40 Pickup assy PEA1179
41
Guide
bar
PLA1094
PWB
Holder
iporete
righ
a
42
Gearl
PNW2052
Pisce
43 Gear stopper PNB1303
44 Screw BPZ20P060FMC
45 Earth spring PBH1132
NSP
46
Mechanism
base
TT
PNB1431
Siac
sett
47
Screw
BPZ26P100FMC
Pe
San
48
PWB
holder
PNW2057
rea
AQ. dieses
50 Mechanism board assy PWX1192

PD-S904, PD-S904-G |
3. DISASSEMBLY
3.1 REMOVE THE TRAY PANEL
Hold the tray panel with your hands as shown in Fig. 1, and grasp
the tray with your thumbs and then lift the tray panel up while pull-
ing it toward you with the other fingers. (Fig. 2)
Fig. 1
Fig. 2
3.2 INSTALL THE TRAY PANEL
Align the tray panel with the grooves located at both edges of the
tray. And then press it down till it stops. (Fig. 3)
Tray Panel
Tray
Fig. 3