akira AMP-300 User manual

Amplifier
Service Manual

2
Model No.: AMP-300
Version: 1.0
MODEL:
AMP-300

3
Model No.: AMP-300
Version: 1.0
CONTENTS
SPECIFICATION............................................................................................................................... 4
DISASSEMBLY INSTRUCTION ...................................................................................................... 5
FLOW CHART .................................................................................................................................. 7
PRINCIPLE CHART.......................................................................................................................... 8
PCB BOARD ..................................................................................................................................... 9
GENERAL CHART ......................................................................................................................... 11
PART LIST ...................................................................................................................................... 12

4
Model No.: AMP-300
Version: 1.0
SPECIFICATION
Power at 6 Ohm @ 1% THD
All channels driven: 70 watt per channel
Power at 6 Ohm @ 10% THD
All channels driven: 80 watt per channel
Power at 8 Ohm @ 1% THD
All channels driven: 60 watt per channel
Power at 8 Ohm @ 10% THD
All channels driven: 70 watt per channel
THD <1%
Frequency response 20Hz – 20KHz
SN Ratio >75dB
Impedance Output 8Ω
Selectivity 250mv
522KHz ~ 1611KHz AMFrequency Range
87MHz ~ 108MHz FM

A
5
Model No.: AMP-300
Version: 1.0
DISASSEMBLY INSTRUCTION
Study the cords layout carefully before any takedown. Set them as original after servicing.
1. Amplifier board;
- disassembly 3 screws A(fig.1)
- disassembly 4 screws B(fig.2)
- move away the amplifier board
2. Indicator panel;
- disassembly 9 screws C(fig.3)
- move away the indicator panel

B
Fig 2
C
Fig 3
7
PCB BOARD 6
Model No.: AMP-300
Version: 1.0

POWER
SIGNAL INPUT FRONT AMPLIFIER
DECODE AMPLIFIER
LIST /KEY CONTROL
7
Model No.: AMP-300
Version: 1.0
FLOW CHART

8
Model No.: AMP-300
Version: 1.0
PRINCIPLE CHART

9
Model No.: AMP-300
Version: 1.0
PCB BOARD

10
Model No.: AMP-300
Version: 1.0
PCB BOARD

11
Model No.: AMP-300
Version: 1.0
GENERAL CHART

12
Model No.: AMP-300
Version: 1.0
PART LIST
Type Code Description Usage
0300181 Electrolytic capacitor 50V 10000uF ± 20% Dia30x51NOVA 2
05141 IC M62446 FP SOP 1
05169 IC KA7805 1
05177 IC KA7812 1
05191 IC KA7912 1
07041 Transistor 2SA1941—0 5
07091 Transistor 2SC5198—0 5
10041 Relay JZX –18FF (Y—330) DC 12V pin 2
12032 Optical receiver TORX178B 1
13049 Fuse 250V T8A DIA 5 x 20 3C/UL 2
13062 Fuse 250V T2A DIA 5 x 20 VDE/UL/3C 3
B10121 Double decoder panel DTS/ AC –3 JT601/ VER3.0 FSA—3010R 1
Amplifier
board
B60394
Other material
05169 IC KA7805 1
05144 IC PT6311 SOP 1
090101 Tact switch 6x6 H=17m 7
12006 Receiver 1
12269 Display screen HL –D039 1
Control
panel
B60611
other material
090278 AC power switch vertical type PS5 TV—5 mono—polarizeSwitch
panel
B60307
Other material
090091 Coding switch R162EC –3D1 –24C B typeVolume
panel Other material
11472-2 Transformer
13072 Fuse
12033 Receiver
B11065-1 Remote control
Other
accessories
Other material