Pioneer GM-2047 Service manual

PIONEER CORPORATION 4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan

PIONEER ELECTRONICS (USA) INC. P.O.Box 1760, Long Beach, CA 90801-1760 U.S.A.
PIONEER EUROPE NV Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS ASIACENTRE PTE.LTD. 253 Alexandra Road, #04-01, Singapore 159936

C PIONEER CORPORATION 2004

K-ZZB. AUG. 2004 Printed in Japan

ORDER NO.

CRT3338

6 CHANNEL POWER AMPLIFIER

GM-2047ZG/X1R/UC

GM-2047ZG/X1R/UC

For details, refer to "Important symbols for good services".

GENERAL MOTORS

VEHICLE DESTINATION PRODUCED AFTER PART No. ID No. PIONEER MODEL No.
Chevy Cobalt North America October 2004 22699257 GM-2047ZG/X1R/UC

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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.

SAFETY INFORMATION

CAUTION

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.

W

ARNING

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

- Service Precaution

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.

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CONTENTS

SAFETY INFORMATION............................................2

1. SPECIFICATIONS .......................................................3

2. EXPLODED VIEWS AND PARTS LIST ......................4

2.1 PACKING..............................................................4

2.2 EXTERIOR............................................................5

3. SCHEMATIC DIAGRAM.............................................6

3.1 SCHEMATIC DIAGRAM (GUIDE PAGE) .............6

4. PCB CONNECTION DIAGRAM................................12

4.1 AMP UNIT..........................................................12

5. ELECTRICAL PARTS LIST........................................16

6. ADJUSTMENT.........................................................19

7. GENERAL INFORMATION.......................................19

7.1 DIAGNOSIS .......................................................19

7.1.1 DISASSEMBLY.........................................19

7.1.2

CONNECTOR FUNCTION DESCRIPTION ......20

8. OPERATIONS ...........................................................20

1. SPECIFICATIONS

Power source .................................................................. 14.4 V DC (10.5 — 16.0 V allowable)

Grounding system ............................................................................................ Negative type

Backup Current .................................................................................................. 0.5 mA or less

Dimensions .......................................................................... 195 (W) x 46 (H) x 138.4 (D) mm

Weight ............................................................................................................................ 1.18 kg

Rated power ........................................................................................................ 33 W or more

Frequency response (Front) ............................................ + 4.7 ± 3.0 dB (100 kHz / 1 kHz ref.)

Frequency response (Rear) .............................................. + 2.4 ± 3.0 dB (100 kHz / 1 kHz ref.)

Frequency response (Subwoofer)...................................... - 4.3 ± 3.0 dB (100 Hz / 80 Hz ref.)

Distortion ........................................................................................ 1.0 % or less (10 W, 1 kHz)

Separation ............................................................................................ 50 dB or more (1 kHz)

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2. EXPLODED VIEWS AND PARTS LIST

2.1 PACKING

- PACKING SECTION PARTS LIST

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.

- For the applying amount of lubricants or glue, follow the instructions in this manual.
( In the case of no amount instructions, apply as you think it appropriate.)

* 1 Protector HHP0237
* 2 Protector HHP0239
* 3 Protector HHP0240
* 4 Protector HHP0238
* 5 Contain Box HHL0423

Mark No. Description Part No.

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2.2 EXTERIOR

1 Screw BMZ26P200FTC
2 Screw BMZ30P050FTC
3 Case HNB0205
4 Heat Sink HNR0285
5 Amp Unit HWM0105

6 Connector(CN801) HKE0028
7 Connector(CN802) HKE0029
8 Holder HNC0057
9 Screw PPZ40P080SAD

10 Chassis Unit HXA0401

11 Screw IMS30P050FTC

Mark No. Description Part No. Mark No. Description Part No.

- EXTERIOR SECTION PARTS LIST

A-a A-b

A-a

A-b

A-b

A-a

Large size

SCH diagram

Guide page

Detailed page

Note: When ordering service parts, be sure to refer to " EXPLODED VIEWS AND PARTS LIST" or
"ELECTRICAL PARTS LIST".

A-a

A

Decimal points for resistor
and capacitor fixed values
are expressed as :

2.2 2R2

0.022 R022

←

←

Symbol indicates a resistor.
No differentiation is made between chip resistors and
discrete resistors.

NOTE :

Symbol indicates a capacitor.
No differentiation is made between chip capacitors and
discrete capacitors.

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3. SCHEMATIC DIAGRAM

3.1 SCHEMATIC DIAGRAM (GUIDE PAGE)