Service
Manual
1. SAFETY INFORMATION ...................................... 2
2. EXPLODED VIEWS AND PARTS LIST ................ 3
3. SCHEMATIC DIAGRAM ..................................... 10
4. PCB CONNECTION DIAGRAM .......................... 26
5. PCB PARTS LIST ............................................... 38
6. ADJUSTMENT .................................................... 43
CONTENTS
7. GENERAL INFORMATION ................................ 50
7.1 PARTS .......................................................... 50
7.1.1 IC ........................................................... 50
7.1.2 DISPLAY ................................................ 54
7.2 DIAGNOSIS .................................................. 55
7.2.1 DISASSEMBLY ..................................... 55
7.2.2 PCB LOCATIONS ................................. 58
7.3 BLOCK DIAGRAM ........................................ 59
8. PANEL FACILITIES AND SPECIFICATIONS .... 60
XC-L7
STEREO CD RECEIVER
ORDER NO.
RRV1946
T - ZZK APR. 1998 Printed in Japan
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 Lane Crawford Place, Singapore 0923
C
C
C
C
C PIONEER ELECTRONIC CORPORATION 1998
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
Type
Model
XC-L7
Power Requirement
Remarks
KUXJ/CA
AC120V
2
XC-L7
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 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
XC-L7
2.1 PACKING
1
Remote Control Unit Holder
AAH7008
2
Display Unit Cord
ADE7014
(10P Mini-DIN Cable)
3
Power Cord
ADG1152
4
FM Antenna
ADH7004
NSP
5
Vinyl Bag
AHG7031
6
Operating Instructions
ARE7169
(English/French)
NSP
7
Caution SG
ARR7013
8
· · · · ·
NSP
9
Warranty Card
ARY1051
10
AM Loop Antenna
ATB7007
11
Remote Control Unit
AXD7145
(CU-XC004)
12
Battery Case
AZE7116
· PACKING PARTS LIST
Mark No.
Description
Part No.
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.
22
18(1/4)
18(2/4)
18(3/4)
18(4/4)
21
23
19(1/2)
19(2/2)
17
16
15
20
4
3
2
13
Lithium Battery
1
10
6
11
12
15
24
5
7
9
!
Mark No.
Description
Part No.
NSP
13
Lithium Battery (CR2025)
VEM1009
14
· · · · ·
15
Polyethylene Bag
Z21-038
NSP
16
Protect Sheet
AEH7004
NSP
17
Silica Gel
AEN7001
18
Pad FCD (PS)
AHA7175
19
Pad RCD (PS)
AHA7182
20
Packing Case
AHD7622
NSP
21
Vinyl Bag
AHG7036
NSP
22
Polyethylene Bag
CEG1116
23
Mirror Mat Sheet
Z23-007
NSP
24
DISPLAY UNIT DU-L7
· · · · ·
4
XC-L7
2.2 MAIN SECTION (XC-L7)
G
36
43
36
43
43
33
33
35
29
28
43
43
37(1/2)
37(2/2)
2
11
3
5
XC-L7
A
C
B
E
D
D
F
E
C
F
A
B
G
32
10
21
39
48
48
27
4
48
31
20
7
13
15
18
50
17
34
47
23
42
41
42
42
38
38
38
40
43
43
43
46
43
45
43
43
43
8
14
22
25
9
38
49
24
6
49
24
44
30
44
44
16
Refer to
"2.4 SINGLE MECHANISM ASSY"
1
5
19
31
48
26
48
51