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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
C PIONEER ELECTRONIC CORPORATION 1998
K-ZZU. JULY 1998 Printed in Japan
ORDER NO.
CRT2223
MULTI-COMPACT DISC PLAYER
CDX-M2086ZBM
X1HWL
Service
Manual
BMW
CONTENTS
1. SAFETY INFORMATION ............................................3
2. EXPLODED VIEWS AND PARTS LIST .......................4
3. SCHEMATIC DIAGRAM ...........................................12
4. PCB CONNECTION DIAGRAM ................................24
5. ELECTRICAL PARTS LIST ........................................30
6. ADJUSTMENT..........................................................33
7. GENERAL INFORMATION .......................................40
7.1 IC .........................................................................40
7.2 DIAGNOSIS ........................................................43
7.2.1 DISASSEMBLY .........................................43
7.2.2 TEST MODE ..............................................44
7.2.3 CONNETOR FUNCTION DESCRIPTION..48
7.3 BLOCK DIAGRAM ..............................................49
8. OPERATIONS AND SPECIFICATIONS.....................50
- See the separate manual CX-652(CRT1857) for the CD mechanism description, disassembly and circuit
description.
- The CD mechanism employed in this model is one of C5 series.
VEHICLE
DESTINATION
PRODUCED AFTER
ID No.
BMW PART No. PIONEER MODEL No.
BMW 7 series WORLD
1998
65.12-8 375 537.0 CDX-M2086ZBM/X1HWL


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2
CDX-M2086ZBM
- CD Player Service Precautions
1. For pickup unit(Service)(CXX1235) handling, please
refer to"Disassembly"(CX-652 Service Manual
CRT1857).
During replacement, handling precautions shall be
taken to prevent an electrostatic discharge(protection
by a short pin).
2. During disassembly, be sure to turn the power off
since an internal IC might be destroyed when a con-
nector is plugged or unplugged.
3. Please checking the grating after changing the pickup
unit.
4. Since these screws protects the mechanism during
transport, be sure to affix it when it is transported for
repair, etc.
- Transportation of multi-CD Player
Seal
After removing the transport screw,
cover the hole with the supplied seal.
Transport screw
Attach to original position before transporting the set.
A transport screw has been attached to the set in order to protect it
during transportation. After removing the transport screw, cover the
hole with the supplied seal. Be sure to remove the transport screw
Before mounting the set. The removed transport screw should be
retained in the accessory bag for use the next time the set is transported.


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3
CDX-M2086ZBM
2. A "CLASS 1 LASER PRODUCT" label is affixed to the
rear of the player.
3. The triangular label is attached to the mechanism
unit frame.
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.
1. Safety Precautions for those who Service this Unit.
· Follow the adjustment steps (see pages 31 through 37)in the service manual when servicing this unit. When check-
ing or adjusting the emitting power of the laser diode exercise caution in order to get safe, reliable results.
Caution:
1. During repair or tests, minimum distance of 13cm from the focus lens must be kept.
2. During repair or tests, do not view laser beam for 10 seconds or longer.
4. Specifications of Laser Diode
Specifications of laser radiation fields to which human access is possible during service.
Wavelength
=
785 nanometers
Radiant power =
69.7 microwatts(Through a circular aperture stop having a diameter of 80 millimeters)
0.55 microwatts(Through a circular aperture stop having a diameter of 7 millimeters)


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4
CDX-M2086ZBM
2. EXPLODED VIEWS AND PARTS LIST
2.1 PACKING
7
6
6
7
8
5
3
9
4
1
2
NOTE:
- Parts marked by "*"are generally unavailable because they are not in our Master Spare Parts List.
- Screws adjacent to
mark on the product are used for disassembly.
*
1 Pass Card
CRY1122
*
2 Polyethylene Bag
E36-615
3 Carton
HHG3431
4 Contain Box
HHL3431
5 Polyethylene Bag
HEG0009
6 Protector
HHP1668
7 Protector
HHP1669
8 Seal
CNM4918
9 Magazine Assy
CXB2843
- PACKING SECTION PARTS LIST
Mark No. Description
Part No.


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CDX-M2086ZBM
2.2 EXTERIOR