3
5
6
7
8
F
E
D
C
B
A
5
6
7
8
GM-D505/XH/EW
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 .......................................................................................................................................... Negative type
Current consumption .................................................................................................... 43.8 A (at continuous power, 4
)
Average current drawn* ...................................................................................................... 10.9 A (4
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 )
Channel SUB: 300 W
× 1 (4 ) / 600 W × 1 (2 )
Continuous power output ............................................................................................ 65 W
× 4 (4 ) + 225 W × 1 (4 )
(56 W
× 4 (4 ) + 350 W × 1 (2 ))
(DIN45324, +B=14.4 V)
Load impedance .................................................................................................... 4
(Channel A/B: 4 -- 8 allowable)
(Channel SUB: 2 -- 8
allowable)
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 k
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.
