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ORDER NO.
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. 501 Orchard Road, #10-00 Wheelock Place, Singapore 238880
PIONEER ELECTRONIC CORPORATION 1998
RRV2008
CONTENTS
T ­ IZK SEPT. 1998 Printed in Japan
1. SAFETY INFORMATION ...................................... 2
2. EXPLODED VIEWS AND PARTS LIST ................ 3
3. SCHEMATIC DIAGRAM ..................................... 14
4. PCB CONNECTION DIAGRAM .......................... 32
5. PCB PARTS LIST ............................................... 47
6. ADJUSTMENT .................................................... 55
7. GENERAL INFORMATION ............................... 61
7.1 PARTS ......................................................... 61
7.1.1 IC ......................................................... 61
7.1.2 DISPLAY .............................................. 67
7.2 DISASSEMBLY ........................................... 69
7.3 BLOCK DIAGRAM ....................................... 72
8. PANEL FACILITIES AND SPECIFICATIONS .... 74
STEREO CD CASSETTE DECK RECEIVER
XR-A880
XR-A770
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
Type
Model
Power Requirement
The Voltage can be converted by
XR-A880
XR-A770
the following method.
DBDXJ
AC110-127V/220-230V/240V
With the voltage selector
DXJ/NC
AC110-127V/220-230V/240V
With the voltage selector
· XR-A880


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2
XR-A880, XR-A770
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


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3
XR-A880, XR-A770
2.1 PACKING
1
FM Antenna
ADH7004
2
Operating Instructions
See Contrast table (2)
3
AM Loop Antenna
XTB3001
4
Remote Control Unit
See Contrast table (2)
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
XHA3005
9
Rear Pad
XHA3006
(1) PACKING PARTS LIST
Mark No.
Description
Part No.
2. EXPLODED VIEWS AND PARTS LIST
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.
10
Packing Case
See Contrast table (2)
11
Packing Sheet
AHG7049
12
Power-cord Plug
See Contrast table (2)
Conversion Adapter
13
Power Cord
See Contrast table (2)
NSP
14
Polyethylene Bag
AHG7033
15
Operating Instructions
See Contrast table (2)
Mark No.
Description
Part No.
(2) CONTRAST TABLE
XR-A880/DBDXJ, DXJ/NC, XR-A770/DBDXJ and DXJ/NC are constructed the same except for the following :
Mark No.
Symbol and Description
Part No.
Remarks
XR-A880
XR-A880
XR-A770
XR-A770
/DBDXJ
/DXJ/NC
/DBDXJ
/DXJ/NC
2
Operating Instructions
Not used
XRE3010
Not used
XRE3010
(English/Spanish/Portuguese)
2
Operating Instructions (English/Spanish/Chinese)
XRE3011
Not used
XRE3011
Not used
4
Remote Control Unit (CU-XR050)
XZN3008
XZN3008
Not used
Not used
4
Remote Control Unit (CU-XR049)
Not used
Not used
XZN3007
XZN3007
10
Packing Case
XHD3051
XHD3034
XHD3047
XHD3033
12
Power-cord Plug Conversion Adapter
Not used
VKX1007
Not used
VKX1007
13
Power Cord
ADG1158
ADG1154
ADG1158
ADG1154
15
Operating Instructions (English/French/German/
Not used
Not used
XRE3016
XRE3016
Italian/Dutch/Swedish/Spanish/Portuguese/Chinese)
15
Operating Instructions (English/French/Spanish/
XRE3018
XRE3018
Not used
Not used
Portuguese/Chinese)
12
VO
L
KA
RA
OK
E
SF
C
DIS
C
DIS
C
DIS
C
C
LE
AR
ST
AT
IO
N
RE
M
OT
E
CO
NT
RO
L
UN
IT
CU
-X
R0
25
M
O
N
O
BA
N
D
PG
M
RE
PE
AT
RA
ND
O
M
AU
X
P.B
AS
S
DIS
PL
AY
SL
EE
P
PO
W
ER
6
1
3
DXJ/NC Type Only
7
9(1/2)
8(1/2)
8(2/2)
9(2/2)
10
2
13
14
11
15
4
5


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4
XR-A880, XR-A770
2.2 EXTERIOR (1/2)
2
12
12
Note :
Attatch on the same numbers
× three.
Refer to
"2.5 $M MECHANISM CD".
Note :
Hook Tray cap on top of loading tray and then
insert the bottom three hooks.
9
9
11
15
11
15
11
1
6
10
4
5
7
14
13
3
3
XR-A770 Only
9
8
17
16


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5
XR-A880, XR-A770
(1) EXTERIOR (1/2) PARTS LIST
Mark No.
Description
Part No.
1
20P F.F.C/30V
XDD3017
NSP
2
$M Mechanism CD
XXA3005
3
Volume Knob
XAA3005
4
FL Cover A
XAK3026
5
FL Cover B
XAK3036
6
Tray Cap
XAK3019
7
Display Panel
See Contrast table (2)
8
Bonnet Case
XZN3040
9
Screw
BPZ30P100FZK
10
Pioneer Badge
XZN3049
11
Screw
VBZ30P080FZK
12
Disc Label
XAX3127
13
Jog Knob Assy
XXG3023
14
Bass Knob
XAB3005
15
Screw
BCZ30P080FZK
16
Cord Stopper
DNF1128
17
Push Rivet
AEC7138
(2) CONTRAST TABLE
XR-A880/DBDXJ, DXJ/NC, XR-A770/DBDXJ and DXJ/NC are constructed the same except for the following :
Mark No.
Symbol and Description
Part No.
Remarks
XR-A880
XR-A880
XR-A770
XR-A770
/DBDXJ
/DXJ/NC
/DBDXJ
/DXJ/NC
7
Display Panel
XAK3029
XAK3029
XAK3028
XAK3028