Pioneer GM-D505 Service Manual - Page 3

Browse online or download pdf Service Manual for Amplifier Pioneer GM-D505. Pioneer GM-D505 30 pages. 5 channel power amplifier
Also for Pioneer GM-D505: Owner's Manual (6 pages)

Print Page

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

1. SPECIFICATIONS

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

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

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

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

Average 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)

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

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

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

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

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

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

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

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

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.

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

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

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

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

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

7.1.2

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

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

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

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

(56 W × 4 (4 Ω) + 350 W × 1 (2 Ω))

(DIN45324, +B=14.4 V)

(Channel SUB: 2 - 8 Ω allowable)

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

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

Cut off slope: -12 dB/oct

(125 mV - 6.5 V)

GM-D505/XH/EW

CONNECTOR FUNCTION DESCRIPTION

......27