Pioneer GMD-505 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 2003

K-ZZB. MAY 2003 Printed in Japan

ORDER NO.

CRT3076

5 CHANNEL POWER AMPLIFIER

GM-D505XH/EW, XR/EW

GM-D505/XH/EW

GM-D505XH/ES, XR/ES

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

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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.

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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............................................................6

3. SCHEMATIC DIAGRAM.............................................8

3.1 SCHEMATIC DIAGRAM(GUIDE PAGE)..............8

4. PCB CONNECTION DIAGRAM................................16

4.1 AMP UNIT..........................................................16

4.2 NETWORK PCB .................................................20

4.3 CONNECTOR PCB.............................................20

5. ELECTRICAL PARTS LIST........................................21

6. ADJUSTMENT.........................................................25

7. GENERAL INFORMATION.......................................26

7.1 DIAGNOSIS .......................................................26

7.1.1 DISASSEMBLY.........................................26

7.1.2 CONNECTOR FUNCTION DESCRIPTION ......27

7.2 IC ........................................................................28

7.3 CIRCUIT DESCRIPTIONS ..................................29

8. OPERATIONS...........................................................30

1. SPECIFICATIONS

Power source............................................................................................................ 14.4 V DC (10.8 — 15.1 V allowable)

Backup current ................................................................................................................................................ 3 mA or less

Grounding system .......................................................................................................................................... Negati ve type

Current consumption .................................................................................................... 43.8 A (at continuous power, 4 Ω)

Av erage current drawn* ...................................................................................................... 10.9 A (4 Ω for five channels)

Fuse ........................................................................................................................................................................ 25 A × 3

Dimensions ...................................................................................................................... 350 (W) × 52 (H) ×268 (D) mm

Weight .................................................................................................................... 3.9 kg (Leads for wiring not included)

Maximum power output .................................................................................................... Channel A/B: 100 W × 4 (4 Ω)

Channel SUB: 300 W × 1 (4 Ω) / 600 W ×1 (2 Ω)

Continuous power output ............................................................................................ 65 W × 4 (4 Ω) + 225 W ×1 (4 Ω)

(56 W × 4 (4 Ω) + 350 W ×1 (2 Ω))

(DIN45324, +B=14.4 V)

Load impedance .................................................................................................... 4 Ω (Channel A/B: 4 — 8 Ω allowable)

(Channel SUB: 2 — 8 Ω allo wable)

Frequency response .................................................................................. Channel A/B: 10 — 40,000 Hz (+0 dB, –1 dB)

Channel SUB: 5 — 240 Hz (+0.5 dB, –3 dB)

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

Distortion .................................................................................................................... Channel A/B: 0.01% (10 W, 1 kHz)

Channel SUB: 0.03% (10 W, 120 Hz)

Low pass filter (Channel SUB) ........................................................................................ Cut off frequency: 40 — 240 Hz

Cut off slope: –12 dB/oct

High pass filter (Channel A/B) ........................................................................................ Cut off frequency: 40 — 240 Hz

Cut off slope: –12 dB/oct

Bass level control (Channel SUB) .............................................................................................................. –22 — +12 dB

(125 mV — 6.5 V)

Level/gain control (Channel A/B) ............................................................................................................ 200 mV — 6.5 V

Maximum input level/impedance .......................................................................................................... RCA: 6.5 V/22 kΩ

Note:

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

*Average current drawn

• 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. EXPLODED VIEWS AND PARTS LIST

2.1 PACKING

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Part No.

GM-D505/XH/EW GM-D505/XH/ES

Mark No. Description GM-D505/XR/EW GM-D505/XR/ES

1 Screw Assy HEA0063 HEA0063
2 Screw BYC40P180FZK BYC40P180FZK
3 Polyethylene Bag HEG0011 HEG0011
4 Polyethylene Bag HEG0022 HEG0022
5 Carton HHG0359 HHG0359

6 Contain Box HHL0359 HHL0359

7 Protector HHP0180 HHP0180
8-1 Owner’s Manual HRD0231 HRD0232
8-2 Owner’s Manual Not used HRD0233

* 8-3 Warranty Card HRY1157 Not used

9 Core HTX0003 HTX0003

* 10 Polyethylene Bag HEG0025 HEG0025
* 11 Lock Tie HNV0025 HNV0025

- 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.)

- Owner's Manual

Part No. Language
HRD0231 English, Spanish, German, French, Italian, Dutch
HRD0232 English, Spanish
HRD0233 Arabic, Portuguese

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2.2 EXTERIOR

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1 Screw BBZ30P060FMC
2 Screw BBZ30P080FMC
3 Plate Unit HXA0395
4 Case HNB0204
5 Lighting Conductor HNC0128

6 Lighting Conductor HNC0129
7 Lighting Conductor HNC0130
8 Lighting Conductor HNC0139
9 Insulator HNM0112

10 Insulator HNM0144

11 Heat Sink HNR0240
12 Holder HNV0051
13 Amp Unit(EW) HWH0213

Amp Unit(ES) HWH0214

14 Screw BBZ30P050FZK

15 Screw BBZ30P060SAD
16 Screw BBZ30P080FMC
17 Screw BBZ30P100SAD
18 Screw BSZ30P160FMC
19 Terminal(CN605) CKF1059

20 Terminal(CN606) CKF1059
21 Terminal(CN607) CKF1059
22 Cushion CNM6825
23 Fuse(25A)(FU601-603) HEK0025
24 Pin Jack(CN801) HKB0022

25 Pin Jack(CN802) HKB0024
26 Terminal(CN804) HKE0045
27 Terminal(CN803) HKE0050
28 Terminal(CN601) HKE0051
29 Connector(CN103) HKS0005

30 Clip HNC0054
31 Holder HNC0143
32 Holder HNC0144
33 Spacer HNM0006
34 Insulator HNM0125

35 Insulator HNM0126
36 Bar HNR0124
37 Heat Sink HNR0201
38 Heat Sink HNR0202
39 Heat Sink HNR0203

40 Screw PPZ30P120FZK
41 Screw VBZ30P110FZK
42 Network Unit HWG0030
43 Connector(CN102) HKS0004
44 Clip HNC0054

45 Screw PBB30P140FMC
46 Screw PPZ30P120FZK
47 Light Pipe Unit HXA0383
48 IC(IC501,502,551,552) TDA7294V
49 FET(Q401,402) IRF5305

50 FET(Q403,404) IRFZ44E
51 Transistor(Q622) 2SD2395
52 Transistor(Q623) 2SB1566
53 Thermistor(TH601,602) CCX1013
54 Diode(D610) FML22R

55 Diode(D611) FML22S
56 FET(Q610-617) STP75NF75
57 LED(D910) DB3804X
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Variable Resistor(VR201,231)CCS1265

59

Variable Resistor(VR131)

CCS1266

60 Beads Core HTF0003

* 61 Badge Unit HXA0380

62 Beads Core HTF0001
63

Variable Resistor(VR101,151)

CCS1266

64

Variable Resistor(VR251)

CCS1265

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

- EXTERIOR SECTION PARTS LIST

3. SCHEMATIC DIAGRAM

3.1 SCHEMATIC DIAGRAM (GUIDE PAGE)

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 B

B HPF

SWITCH

A HPF

SWITCH

BFC SWITCH

100K(B)

10K(A)

10K(A)

20K(E)

B

NETWORK PCB(1/2)

B

NETWORK
PCB(2/2)

A Freq

A Freq

A Gain

A Gain

B Freq

B Freq

B Freq

B Freq

B Gain

B Gain

Sub Freq

Sub Freq

Sub Gain

Sub Gain

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A-b

A C

SL+
SR+

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AMP UNIT

C

CONNECTOR
PCB

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

2.2 2R2

0.022 R022

←

←

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.

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.

NETWORK UNIT
Consists of
NETWORK PCB
CONNECTOR PCB

HEK0025

HEK0025

HEK0025

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