Pioneer GM-3400-T 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

PIONEER CORPORATION 2009

GM-3400T/XJUC

BRIDGEABLE TWO-CHANNEL POWER AMPLIFIER

ORDER NO.

CRT4513

GM-3400T

GM-3400T
GM-3400T

/XJEW5

/XJES

/XJUC

For details, refer to "Important Check Points for Good Servicing".

K-ZZZ. DEC. 2009 Printed in Japan

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SAFETY INFORMATION

CAUTION

Where in a manufacturer’s service documentation, for example in circuit diagrams or lists
of components, a symbol is used to indicate that a specific component shall be replaced only
by the component specified in that documentation for safety reasons, the following symbol shall
be used:

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 may contain a chemical known to the State of California to cause cancer, or birth defects or
other reproductive harm.
Health & Safety Code Section 25249.6 - Proposition 65

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[Important Check Points for Good Servicing]

In this manual, procedures that must be performed during repairs are marked with the below symbol.
Please be sure to confirm and follow these procedures.

1. Product safety

Please conform to product regulations (such as safety and radiation regulations), and maintain a safe servicing environment by
following the safety instructions described in this manual.

1 Use specified parts for repair.

Use genuine parts. Be sure to use important parts for safety.

2 Do not perform modifications without proper instructions.

Please follow the specified safety methods when modification(addition/change of parts) is required due to interferences such as
radio/TV interference and foreign noise.

3 Make sure the soldering of repaired locations is properly performed.

When you solder while repairing, please be sure that there are no cold solder and other debris.
Soldering should be finished with the proper quantity. (Refer to the example)

4 Make sure the screws are tightly fastened.

Please be sure that all screws are fastened, and that there are no loose screws.

5 Make sure each connectors are correctly inserted.

Please be sure that all connectors are inserted, and that there are no imperfect insertion.

6 Make sure the wiring cables are set to their original state.

Please replace the wiring and cables to the original state after repairs.
In addition, be sure that there are no pinched wires, etc.

7 Make sure screws and soldering scraps do not remain inside the product.

Please check that neither solder debris nor screws remain inside the product.

8 There should be no semi-broken wires, scratches, melting, etc. on the coating of the power cord.

Damaged power cords may lead to fire accidents, so please be sure that there are no damages.
If you find a damaged power cord, please exchange it with a suitable one.

9 There should be no spark traces or similar marks on the power plug.

When spark traces or similar marks are found on the power supply plug, please check the connection and advise on secure
connections and suitable usage. Please exchange the power cord if necessary.

a Safe environment should be secured during servicing.

When you perform repairs, please pay attention to static electricity, furniture, household articles, etc. in order to prevent injuries.
Please pay attention to your surroundings and repair safely.

2. Adjustments

To keep the original performance of the products, optimum adjustments and confirmation of characteristics within specification.
Adjustments should be performed in accordance with the procedures/instructions described in this manual.

4. Cleaning

For parts that require cleaning, such as optical pickups, tape deck heads, lenses and mirrors used in projection monitors, proper
cleaning should be performed to restore their performances.

3. Lubricants, Glues, and Replacement parts

Use grease and adhesives that are equal to the specified substance.
Make sure the proper amount is applied.

5. Shipping mode and Shipping screws

To protect products from damages or failures during transit, the shipping mode should be set or the shipping screws should be
installed before shipment. Please be sure to follow this method especially if it is specified in this manual.

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CONTENTS

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

1. SERVICE PRECAUTIONS ............................................................................................................................... 5

1.1 SERVICE PRECAUTIONS......................................................................................................................... 5

1.2 NOTES ON SOLDERING .......................................................................................................................... 7

2. SPECIFICATIONS ............................................................................................................................................ 8

2.1 SPECIFICATIONS...................................................................................................................................... 8

2.2 PANEL FACILITIES .................................................................................................................................. 10

2.3 CONNECTION DIAGRAM ....................................................................................................................... 11

3. BASIC ITEMS FOR SERVICE........................................................................................................................ 12

3.1 CHECK POINTS AFTER SERVICING..................................................................................................... 12

3.2 JIGS LIST ................................................................................................................................................ 12

4. BLOCK DIAGRAM.......................................................................................................................................... 12

5. DIAGNOSIS.................................................................................................................................................... 13

5.1 CONNECTOR FUNCTION DESCRIPTION............................................................................................. 13

6. SERVICE MODE ............................................................................................................................................ 13

7. DISASSEMBLY............................................................................................................................................... 14

8. EACH SETTING AND ADJUSTMENT ........................................................................................................... 15

9. EXPLODED VIEWS AND PARTS LIST.......................................................................................................... 16

9.1 PACKING ................................................................................................................................................. 16

9.2 EXTERIOR............................................................................................................................................... 18

10. SCHEMATIC DIAGRAM ............................................................................................................................... 20

10.1 AMP UNIT(GUIDE PAGE)...................................................................................................................... 20

11. PCB CONNECTION DIAGRAM ................................................................................................................... 26

11.1 AMP UNIT.............................................................................................................................................. 26

12. ELECTRICAL PARTS LIST .......................................................................................................................... 30

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1. 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.

2. Be careful in handling ICs. Some ICs such as MOS type are so fragile that they can be damaged by electrostatic
induction.

3. When you tighten the screws No. 1 to 10, tightly hold a transistor or a diode to be fixed to prevent the part from
turning by the force of tightening the screw.
(If the part turned, a stress will be applied to the solder and may cause a failure such as a solder crack.)

4. When you replace a part fixed to the heatsink (Q515, Q516, Q517,Q518, Q519, Q520, Q803, Q804, D821 and D822),
adjust the position of the part according to the following.

Put the Amp Unit on blocks.

1. SERVICE PRECAUTIONS

1.1 SERVICE PRECAUTIONS

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Put a paper between the block and the Amp Unit,
and outline transistors and diodes.
Put a part to replace in the outline.

Align the bottom of a transistor or a diode with the
top of the PC board, and solder it.
Apply grease, GEM1057 to the back of the part.

5. Silk-prints of "L" and "R" on the Amp Unit are printed wrongly each other. ("L" should be "R", and "R" should be "L".)

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For environmental protection, lead-free solder is used on the printed circuit boards mounted in this unit.
Be sure to use lead-free solder and a soldering iron that can meet specifications for use with lead-free solders for repairs
accompanied by reworking of soldering.

Compared with conventional eutectic solders, lead-free solders have higher melting points, by approximately 40 C.
Therefore, for lead-free soldering, the tip temperature of a soldering iron must be set to around 373 C in general, although
the temperature depends on the heat capacity of the PC board on which reworking is required and the weight of the tip of
the soldering iron.

Compared with eutectic solders, lead-free solders have higher bond strengths but slower wetting times and higher melting
temperatures (hard to melt/easy to harden).

The following lead-free solders are available as service parts:
Parts numbers of lead-free solder:
GYP1006 1.0 in dia.
GYP1007 0.6 in dia.
GYP1008 0.3 in dia.

1.2 NOTES ON SOLDERING

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2. SPECIFICATIONS

Power source...........................14.4 V DC (10.8 V to 15.1 V

allowable)

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

Current consumption .......... 15 A (at continuous power,

4 ohm)

Average current drawn........ 4 A (4 ohm for two channels)

7.8 A (4 ohm for one channel)

Fuse ......................................... 25 A × 1

Dimensions (W × H × D) ...263 mm × 61 mm × 206

mm(10-3/8 in. × 2-3/8 in. ×

8-1/8 in.)

Weight ..................................... 2 kg (4.4 lbs)

(Leads for wiring not in-

cluded)

Maximum power output ...... 120 W × 2 (4 ohm)

/ 350 W × 1 (4 ohm)
Continuous power output ..60 W × 2 (at 14.4 V, 4 ohm

, 20 Hz to 20 kHz 0.2% THD)

175 W × 1 (at 14.4 V, 4 ohm

, 20 Hz to 20 kHz 0.8% THD)

85 W × 2 (at 14.4 V, 2 ohm

, 20 Hz to 20 kHz 0.8% THD)

Load impedance ................... 4 ohm (2 ohm to 8 ohm allowable)

(Bridge connection: 4 ohm to 8

ohm allowable)

Frequency response............ 10 Hz to 50 kHz (+0 d B,

–1

dB)

Signal-to-noise ratio............ 95 dB (IHF-A network)

Distortion ................................ 0.01 % (10 W, 1 kHz)

Separation .............................. 70 dB (1 kHz)

Low pass filter:

Cut off frequency......... 80 Hz

Cut off slope.................. –12 dB/oct

Gain control:

RCA ................................. 200 mV to 6.5 V

Speaker ........................... 0.8 V to 26 V

Maximum input level / impedance:

RCA .................................. 6.5 V / 22 k ohm

Speaker ............................ 26 V / 9 0 k ohm

CEA2006 Specifications

Power output .......................... 60 W RMS × 2 Channels (at

14.4 V, 4 ohm and

1 % THD
+N)
175 W RMS × 1 Channels
(at 14.4 V, 4 ohm BRIDGE and

1 % THD+N)

85 W RMS × 2 Channels (at

14.4 V, 2 ohm and

1 % THD
+N)

S/N ratio .................................. 75 dBA (reference: 1 W into

4 ohm)

Notes

• Specifications and the design are subject to
modifications without notice due to improve­ments.

• The average current drawn is nearly the maxi­mum current drawn by this unit when an
audio signal is input. Use this value when
working out total current drawn by multiple
power amplifiers.

Backup current ......................0.1 mA or less

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2.1 SPECIFICATIONS

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Power source..........................14.4 V DC (10.8 V to 15.1 V

allowable)

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

Current consumption .......... 15 A (at continuous power,

4 ohm)

Average current drawn........ 4 A (4 ohm for two channels)

7.8 A (4 ohm for one channel)

Backup current ....................... 0.1 mA or less

Fuse ......................................... 25 A × 1

Dimensions (W × H × D) ...263 mm × 61 mm × 206

mm

Weight ..................................... 2 kg (Leads forwiring not in-

cluded)

Maximum power output ....... 120 W × 2 (4 ohm)

/ 350 W × 1(4 ohm)

Continuous power output ... 60 W × 2 (at 14.4 V, 4 ohm)

, 20 Hz to 20 kHz 0.2% THD)
175 W × 1 (at 14.4 V, 4 ohm)
, 20 Hz to 20 kHz 0.8% THD)
85 W × 2 (at 14.4 V, 2 ohm)
, 20 Hz to 20 kHz 0.8% THD)

Load impedance ................... 4 ohm (2 ohm to 8 ohm allowable)

(Bridge connection: 4 ohm to 8
ohm allowable)

Frequency response............. 10 Hz to 50 kHz (+0 d B, –1

dB)

Signal-to-noise ratio............ 95 dB (IEC-A network)

Distortion ................................ 0.01 % (10 W, 1 kHz)

Separation ............................. 70 dB (1 kHz)

Low pass filter:

Cut off frequency......... 80 Hz

Cut off slope.................. –12 dB/oct

Gain control:

RCA ................................ 200 mV to 6.5 V

Speaker .......................... 0.8 V to 26 V

Maximum input level / impedance:

RCA ................................ 6.5 V / 22 k ohm

Speaker .......................... 26 V / 9 0 k ohm

Notes

• Specifications and the design are subject to
modifications without notice due to improve­ments.

• The average current drawn is nearly the maxi­mum current drawn by this unit when an
audio signal is input. Use this value when
working out total current drawn by multiple
power amplifiers.

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2.2 PANEL FACILITIES

What ’s what

Front side

Rear side

To adjust the switch, use a flathead screwdri­ver if needed.

1 Power indicator

The power indicator lights up to indicate
power ON.

2 GAIN (gain) control

If output remains low, even when the car
stereo volume is turned up, turn controls to
lower level. If distortion occurs when the car
stereo volume is turned up, turn these con­trols to higher level.

• For use with an RCA equipped car stereo
(standard output of 500 mV), set to the
NORMAL position. For use with an RCA
equipped Pioneer car stereo, with max.
output of 4 V or more, adjust level to
match that of the car stereo output.

• If you hear too much noise when using
the speaker input terminals, turn the
gain control to higher level.

3 LPF (low-pass filter) switch

Switch the settings based on the connected
speaker.

• When the Subwoofer is connected:

Select ON . This eliminates high range
frequency and outputs low range fre­quency.

• When the full range speaker is con­nected:
Select OFF . OFF outputs the entire fre­quency range.

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