Pioneer gm-x972 Service Manual - Page 3

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1. Overall Connection Diagram(Guide 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

OVERALL CONNECTION DIAGRAM(GUIDE PAGE)

4. PCB CONNECTION DIAGRAM ................................14

4.1 AMP UNIT...........................................................14

5. ELECTRICAL PARTS LIST ........................................18

1. SPECIFICATIONS

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

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

Current consumption ........................................................................................................ 37.5 A (at continuous power, 4 Ω)

Backup current ................................................................................................................................................. 3.0 mA or less

Average current drawn* .......................................................................................................... 12.0 A (4 Ω for two channels)

Fuse ............................................................................................................................................................................ 30 A × 2

Dimensions ...................... . ................................................................................................... 269 (W) × 50 (H) × 309 (D) mm

Weight ......................................................................................................... 3.7 kg (8.2 lbs) (Leads for wiring not included)

Maximum power output ...................... .............................................................................................. 300 W × 2 / 800 W × 1

Continuous power output ..................... .................................... 150 W × 2 (at 14.4 V, 4 Ω, 20 - 20,000 Hz, 0.08% THD)

Load impedance ............................................................................................................................ 4 Ω (2 - 8 Ω allowable)

Frequency response ............................................................................................................ 10 - 50,000 Hz (+0 dB, -1 dB)

Signal-to-noise ratio ..................... .................................................................................................. 100 dB (IHF-A network)

Distortion ...................... . ....................................................................................................................... 0.008% (10 W, 1 kHz)

Separation ......................................................................................................................................................... 65 dB (1 kHz)

Low pass filter ................................................................................................................................ Cut off frequency: 80 Hz

Maximum input level/impedance .................................................................................... RCA: 6.5 V/22 kΩ (0.2 - 6.5 V)

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.

6. ADJUSTMENT..........................................................20

7. GENERAL INFORMATION .......................................21

7.1 DIAGNOSIS ........................................................21

7.1.1 DISASSEMBLY .........................................21

7.1.2

7.2 IC ........................................................................23

....8

8. OPERATIONS............................................................24

18.5 A (4 Ω for one channel)

[10-5/8 (W) × 2 (H) × 12-1/8 (D) in]

400 W × 1 (at 14.4 V, 4 Ω, 20 - 20,000 Hz, 0.8% THD)

200 W × 2 (at 14.4 V, 2 Ω, 20 - 20,000 Hz, 0.8% THD)

(Bridge connection: 4 - 8 Ω allowable)

Cut off slope: -12 dB/oct

Speaker: 26 V/40 kΩ (0.8 - 26 V)

GM-X972/XR/UC

CONNECTOR FUNCTION DESCRIPTION

.......22