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ORDER NO.
CRT2930
PUB. NO.
CRT2930
AUDIO SYSTEM
CD CHANGER
Manufactured for TOYOTA
by PIONEER CORPORATION
VEHICLE
DESTINATION
PRODUCED AFTER
TOYOTA PART No.
ID No.
PIONEER MODEL No.
LEXUS GX470
U.S.A., CANADA
November 2002
86270-60070
CDX-M8027ZT/E
LAND CRUISER
Any country or
September 2002
86270-60070
CDX-M8027ZT/E
PRADO
area except for
Japan
LAND CRUISER
UNITED KINGDOM, September 2002
86270-60080
CDX-M8127ZT/WL
PRADO
AUSTRALIA,
NEW ZEALAND,
SOUTH AFRICA
GX470
Service
Manual


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- CD Player Service Precautions
1. Before disassembling the unit, be sure to turn off the
power. Unplugging and plugging the connectors dur-
ing power-on mode may damage the ICs inside the
unit.
2. To protect the pickup unit from electrostatic dis-
charge during servicing, take an appropriate treat-
ment (shorting pin) by referring to "the DISASSEM-
BLY" on page 61.
3. After replacing the pickup unit, be sure to check the
grating. (See page 46.)
4. The door units CXB8261 and CXB8262 have been
engaged each other tightly. When you have to
replace the door unit CXB8261 or CXB8262, remove
both door units from the Grille to replace them at the
same time.
For details, refer to "Important symbols for good services".
CDX-M8127ZT/WL, CDX-M8027ZT/E
- This service manual should be used together with the following manual(s):
Model No.
Order No.
Mech. Module Remarks
CX-652
CRT1857
C5
CD Mech. Module:Circuit Description, Mech.Description, Disassembly


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2. A "CLASS 1 LASER PRODUCT" label is affixed to the
bottom of the player
.
3. The triangular label is attached to the mechanism
unit frame.
1. Safety Precautions for those who Service this Unit.
· Follow the adjustment steps (see pages 45 through 51)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)
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.


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[ Important symbols for good services ]
In this manual, the symbols shown-below indicate that adjustments, settings or cleaning should be made securely.
When you find the procedures bearing any of the symbols, be sure to fulfill them:
2. Adjustments
To keep the original performances of the product, optimum adjustments or specification confirmation is indispensable.
In accordance with the procedures or instructions described in this manual, adjustments should be performed.
3. Cleaning
For optical pickups, tape-deck heads, lenses and mirrors used in projection monitors, and other parts requiring cleaning,
proper cleaning should be performed to restore their performances.
5. Lubricants, glues, and replacement parts
Appropriately applying grease or glue can maintain the product performances. But improper lubrication or applying
glue may lead to failures or troubles in the product. By following the instructions in this manual, be sure to apply the
prescribed grease or glue to proper portions by the appropriate amount.For replacement parts or tools, the prescribed
ones should be used.
4. Shipping mode and shipping screws
To protect the product from damages or failures that may be caused during transit, the shipping mode should be set or
the shipping screws should be installed before shipping out in accordance with this manual, if necessary.
1. Product safety
You should conform to the regulations governing the product (safety, radio and noise, and other regulations), and
should keep the safety during servicing by following the safety instructions described in this manual.
CONTENTS
SAFETY INFORMATION ............................................3
1. SPECIFICATIONS........................................................5
2. EXPLODED VIEWS AND PARTS LIST .......................6
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM ...12
4. PCB CONNECTION DIAGRAM ................................22
5. ELECTRICAL PARTS LIST ........................................28
6. ADJUSTMENT..........................................................32
7. GENERAL INFORMATION .......................................61
7.1 DIAGNOSIS ........................................................61
7.1.1 DISASSEMBLY .........................................61
7.1.2 CONNECTOR FUNCTION DESCRIPTION .......64
7.2 IC ........................................................................65
7.3 EXPLANATION ...................................................66
7.3.1 SYSTEM BLOCK DIAGRAM.....................66
7.3.2 OPERATIONAL FLOW CHART .................67
7.4 CLEANING ..........................................................68
8. OPERATIONS............................................................68


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1. SPECIFICATIONS
General
Power source ........................................................................................ 13.2 V DC (10.5 ­ 16.0 V allowable)
Grounding system .................................................................................................................. Negative type
Backup current ........................................................................................................................ 1.0 mA or less
Dimensions (No including the brackets) .............................................. 248.2(W) x 66.0(H) x 164.5(D) mm
Weight (CDX-M8127ZT/WL) ................................................................................................................ 2.09 kg
(CDX-M8027ZT/E) .................................................................................................................... 2.05 kg
CD player
System .............................................................................................................. Compact disc audio system
Usable discs .............................................................................................................................. Compact disc
Signal format ................................................................................................ Sampling frequency: 44.1 kHz
Number of quantization bits: 16; linear
Signal-to-noise ratio ................................................................................................................ 85 dB or more
Dynamic range ........................................................................................................................ 80 dB or more
Distortion .................................................................................................................................. 0.04 % or less
Separation ................................................................................................................................ 65 dB or more
Number of channels ........................................................................................................................ 2 (stereo)