ORDER NO.
PIONEER 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 CORPORATION 1999
c
XR-MR7
RRV2250
T ZZR DEC. 1999 Printed in Japan
1. SAFETY INFORMATION ....................................... 2
2. EXPLODED VIEWS AND PARTS LIST ................. 4
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM .. 14
4. PCB CONNECTION DIAGRAM ........................... 50
5. PCB PARTS LIST ................................................ 71
6. ADJUSTMENT ..................................................... 81
CONTENTS
7. GENERAL INFORMATION .................................. 91
7.1 DIAGNOSIS ................................................... 91
7.1.1 DISASSEMBLY ........................................ 91
7.1.2 SEQUNCE AFTER THE POWER ON ...... 96
7.2 PARTS ......................................................... 100
7.2.1 IC ........................................................... 100
7.2.2 DISPLAY ................................................ 103
8. PANEL FACILITIES AND SPECIFICATIONS..... 104
STEREO CD / CD-R RECEIVER
Component
Model
Service manual
Remarks
STEREO CD/CD-R RECEIVER
XR-MR7
RRV2250
This manual.
SPEAKER SYSTEM
S-MR7
RRV2248
Type
Model
Power Requirement
Remarks
XR-MR7
KU/CA
AC120V
MY
AC220-230V
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
FOR U.S. MODELS
NECESSARY INFORMATION FOR DHHS
RULES MARKED ON THE REAR BASE AND ON
THE TOP OF CD MECHANISM AS BELOW.
DANGER LASER RADIATION WHEN OPEN.
AVOID DIRECT EXPOSURE TO BEAM.
¶ This product is a system(s) component.
Be sure to connect it to the prescribed system component(s), otherwise damage may result.
CD1
CD2
CDR
CD --RW
CD3
PGM
STEREO MONO TUNED
P.BASS SKIP ON A.TRACK D.VOL A.VOL DIG ANA [ 32 44 48 ]
RDM ALL RPT-1 SFC
RECORDING
REC
FINALIZE
CD
STANDBY/ON
FINALIZE
ANALOG
DIGITAL
TRACK NO.
PHONES
LINE2 IN
LINE2 OUT
OPTICAL
DIGITAL OUT
WRITE(MANUAL)
AUTO/MANUAL
ERASE
P.BASS
REC LEVEL
REC LEVEL
REC
ALL
1 TRACK
1st TRACK
EACH
DIRECT REC SELECT
-
¶
6
7
+-
+
1
12
CD1
CDR
CDR
CDR
CD
CD
LINE
PHONO
CD 1
MULTI JOG
VOLUME
CD 2
CD 3
CDR
0
0
2
0
3
0
¡
1
6
7
DISPLAY
SPC
(DEMO)
FM/AM
TAPE
TUNING+
4
¢
S.T
.
S
.T
.+
D
O
U
N
UP
TI
M
ER
/C
LO
CK
AD
J
ENTER
ME
NU
/M
O
3COMPACTDISCMULTICHANGER
COMPACT DISC DIGITAL RECORDER
STEREO CD/CD-R RECEIVER XR-MR7
2
XR-MR7
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
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.
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
on the schematics and on the parts list
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.
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.
(FOR USA MODEL ONLY)
Leakage
current
tester
Reading should
not be above
0.5mA
Device
under
test
Test all
exposed metal
surfaces
Also test with
plug reversed
(Using AC adapter
plug as required)
Earth
ground
AC Leakage Test
3
XR-MR7
IMPORTANT
THIS PIONEER APPARATUS CONTAINS
LASER OF CLASS
b.
SERVICING OPERATION OF THE APPARATUS
SHOULD BE DONE BY A SPECIALLY
INSTRUTED PERSON.
LASER DIODE CHARACTERISTICS
MAXIMUM OUTPUT POWER: 23 mW
WAVELENGTH: 778 787 nm
1. Laser Interlock Mechanism
The position of the switch (S601) on the SERVO
MECHANISM Assy for detecting loading state is detected
by the system microprocessor, and the design prevents
laser diode oscillation when the switch (S601) is not on
CLMP terminal side (CLMP signal is OFF or high level.).
Thus, the interlock will no longer function if the switch
(S601) is deliberately set to CLMP terminal side (low
level).
The interlock also does not function in the test mode
.
Laser diode oscillation will continue, if pin 1 of M51593FP
(IC101) on the PRE-AMP BOARD ASSY mounted on the
CD-R PICKUP is connected to GND, or pin 19 is
connected to low level (ON), or else the terminals of Q101
are shorted to each other (fault condition).
2. When the cover is opened with the servo mechanism
block removed and turned over, close viewing of the
objective lens with the naked eye will cause exposure to a
Class 1 laser beam.
Additional Laser Caution
Refer to page 84.
LABEL CHECK
KU/CA Type
VRW-328
Printed on Rear Panel
MY Type
MY Type
MY Type
USYNLIG LASERSTRÅLING VED ÅBNING NÅR SIKKERHED SAF-
BRYDERE ER UDE AF FUNKTION.
UNDGÅ UDSÆTTELSE FOR STRÅLING
UNSICHTBARE LASER-STRAHLUNG TRITT AUS, WENN DECKEL
(ODER KLAPPE) GEÖFFNET IST! NICHT DEM STRAHL AUSSETZEN!
VRW1094
ADVARSEL
VORSICHT!
4
XR-MR7
1
Power Cord
ADG1127
ADG7021
2
FM Antenna
ADH7005
ADH7004
10
Packing Case
AHD7849
AHD7848
NSP
11
Warranty Card
ARY7022
ARY7033
13
Operating Instructions (E)
Not used
ARB7213
14
Operating Instructions (E/F)
ARE7238
Not used
15
Operating Instructions (G/I)
ARE7239
Not used
16
Operating Instructions (D/S)
ARC7290
Not used
17
Operating Instructions (P/Sp)
ARC7291
Not used
2.1 PACKING
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 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.
1
Power Cord
See Contrast table (2)
2
FM Antenna
See Contrast table (2)
3
AM Loop Antenna
ATB7009
4
Remote Control Unit
AXD7241
(CU-XR059)
5
Battery Cover
AZA7378
NSP
6
Dry Cell Battery (R6P, AA)
VEM-013
7
Packing Sheet
AHG7003
8
Front Pad
AHA7281
9
Rear Pad LR
AHA7282
10
Packing Case
See Contrast table (2)
NSP
11
Warranty Card
See Contrast table (2)
12
Polyethylene Bag
Z21-038
(0.03 x 230 x 340)
13
Operating Instructions
See Contrast table (2)
(English)
14
Operating Instructions
See Contrast table (2)
(English/French)
15
Operating Instructions
See Contrast table (2)
(German/Italian)
16
Operating Instructions
See Contrast table (2)
(Dutch/Swedish)
17
Operating Instructions
See Contrast table (2)
(Portuguese/Spanish)
(1) PACKING PARTS LIST
Mark No.
Description
Part No.
VO
L
KA
RA
OK
E
SF
C
DISC
DISC
DISC
C
LE
AR
ST
AT
IO
N
REMOTE
CONTROL
UNIT
CU-XR025
M
O
N
O
BA
N
D
PG
M
RE
PE
AT
RA
ND
OM
AU
X
P.B
AS
S
DIS
PL
AY
SL
EE
P
POWER
2
3
1
4
5
6
16
15
14
13
17
11
9 (1/2)
8
10
7
9(2/2)
12
12
MY:Only
Mark
MY type
KU/CA type
(2) CONTRAST TABLE
XR-MR7/MY and /KU/CA are constructed the same except for the following:
Part No.
Remarks
Symbol and Description
No.
5
XR-MR7
2.2 EXTERIOR SECTION
A
D
D
B
C
A
R
R
M
K
I
S
G
H
G
F
E
O
P
Q
E
H
F
J
K
L
M
N
N
B
Q
P
O
S
L
I
C
J
74
71
MY Type
Only
MY Type
Only
44
3
4
61
1
41
42
29
39
37
20
52
52
52
52
52
52
52
53
53
53
51
51
51
51
51
29
51
51
67
76
43
45
48
45
45
25
26
47
5
9
38
38
10
6
7
49
66
65
70
69
77
8
63
64
31
27
28
37
60
60
15
50 73
51
19
52
52
53
75
55
53
52
2
30
13
13
13
13
36
33
21
35
12
17
21
18
34
14
16
52
51
22
29
23
24
32
51
40
51
58
59
57
65
58
59
56
62
Refer to "2.6 3CD MICROCHANGER MECHA "
Refer to "2.3 FRONT PANEL SECTION"
Refer to "2.4 CD-R CORE ASSY (1/2)
2.5 CD-R CORE ASSY (2/2) "
11