Toa DA-150EH-AM Service Manual
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Toa DA-150EH-AM Service Manual

Toa DA-150EH-AM Service Manual

Multichannel power amplifier
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TABLE OF CONTENTS

1. GENERALDESCRIPTION ...................................................................................................... 2
2. NOTE ON REPAIR WORK SAFETY ...................................................................................... 3-4
3. SPECIFICATIONS .................................................................................................................. 5
4. NOMENCLATURE AND FUNCTIONS ................................................................................... 6-7
MULTICHANNEL POWER AMPLIFIER
5. TROUBLE SHOOTING ........................................................................................................... 8-11
6. WIRING DIAGRAM .................................................................................................................12
7. SCHEMATIC DIAGRAMS ...................................................................................................... 13-16
8. MOUNTING DIAGRAMS AND PARTS LISTS ....................................................................... 17-19
9. EXPLODED VIEW AND PARTS LISTS ................................................................................. 20
DA-150EH-AM
Sold May 2022 onward
10. REPLACING THE REPAIR PARTS ....................................................................................... 21-27
- 1 -

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Summary of Contents for Toa DA-150EH-AM

  • Page 1: Table Of Contents

    6. WIRING DIAGRAM .........................12 7. SCHEMATIC DIAGRAMS ...................... 13-16 8. MOUNTING DIAGRAMS AND PARTS LISTS ............... 17-19 9. EXPLODED VIEW AND PARTS LISTS ................. 20 DA-150EH-AM Sold May 2022 onward 10. REPLACING THE REPAIR PARTS ..................21-27 - 1 -...

  • Page 2: Generaldescription

    1. GENERAL DESCRIPTION 2. NOTE ON REPAIR WORK SAFETY TOA's DA-150EH-AM Multichannel Power Amplifier features high power handling capabilities and Follow the instructions below, both to prevent accidents when making repairs and to ensure post-repair commercial-grade durability. It has a rated output of 150 W x 8 channels (100/70V line output). It covers product safety.

  • Page 3: Specifications

    MODEL DA-150EH-AM MODEL DA-150EH-AM 3. SPECIFICATIONS Conduct safety inspections following the completion of service. Power Source 110-120 V AC, 50/60 Hz 1.Check that all screws, parts, and wiring removed or changed during servicing have been restored to Amplification System Digital class D their original states.

  • Page 4: Nomenclature And Functions

    MODEL DA-150EH-AM MODEL DA-150EH-AM 4. NOMENCLATURE AND FUNCTIONS [Front] [Rear] CH 4 CH 3 CH 2 CH 1 SPEAKER OUT-SET INPUT 4 INPUT 3 INPUT 2 INPUT 1 100V AC INPUT: 1 2 3 4 110-120V 50/60Hz 1000W FUSE: T12AL AC250V...

  • Page 5: Trouble Shooting

    MODEL DA-150EH-AM MODEL DA-150EH-AM 5. TROUBLE SHOOTING Power indicator (green) is off low voice/no voice Is the power cord Is the input signal cable Plug in the power cord firmly. Connect as instructed in the manual. firmly connected? properly connected?
  • Page 6 MODEL DA-150EH-AM MODEL DA-150EH-AM Protect indicator (red) is on Hum noise Is the output load is within the acceptable range Return the load to normal. Is the case grounding normal? Ground the case properly. and not shorted? Make sure that the vents are not blocked...

  • Page 7: Wiring Diagram

    MODEL DA-150EH-AM 6. WIRING DIAGRAM Part Code : HE00105 CH 5 Part Code : HE00105 CH 1 INPUT 5 INPUT 6 INPUT 7 INPUT 8 INPUT 1 INPUT 2 INPUT 3 INPUT 4 AC1 1 0 V- 1 2 0V 5 0 / 6 0Hz...

  • Page 8: Schematic Diagrams

    MODEL DA-150EH-AM 7. SCHEMATIC DIAGRAMS • POWER AMP PCB +12V +12V DC-DC TC-3 +12V-1 TC-4 C106 TC-1 Vout -12V -12V -75V -VCC 120V SELECT TC-2 R206 R109 R216 CH3-OUT TC-1 CH4-OUT AVS:~100-240V TC-3 CH2-OUT D202 CH1-OUT TC-4 IC201 -VCC R213...
  • Page 9 MODEL DA-150EH-AM • PWM PCB COMP VREF OCSET GND2 GND2 R21 R25 GND2 COMP PRO2 PRO2 GND2 GND2 VREF GND2 GND2 OCSET - 14 -...
  • Page 10 MODEL DA-150EH-AM • LED PCB LED1 LED8 +12V +12V -12V PRO78-1 4148 4.7K 5.6K 4.7K SIG8 LED 5.6K PRO56-1 SIG1 L ED CLIP1 RED CLIP8 RED -12V -12V PRO34-1 LED1 0.1u BLM18RK102 0.1u 4148 BLM18RK102 U12A LED2 4580 4580 LED3...
  • Page 11 MODEL DA-150EH-AM • PF PCB C902 2200PF/250V 11mH 2200PF/250V 2200PF/250V C900 1.0uF/275V C906 C907 C901 0.47uF/305V 0.47uF/305V 2200PF/250V - 16 -...

  • Page 12: Mounting Diagrams And Parts Lists

    MODEL DA-150EH-AM 8. MOUNTING DIAGRAMS AND PARTS LISTS The repair of this machine will be the replacement of the board unit. We do not supply individual parts on the board. • PRE AMP PCB (Part Code : HK19863) - 17 -...
  • Page 13 MODEL DA-150EH-AM • POWER AMP PCB (Part Code : HK21007) - 18 -...
  • Page 14 MODEL DA-150EH-AM • LED PCB (Part Code : HK19860) • US POWER CORD (Part Code : HA00882) • PF PCB (Part Code : HK20265) • FAN (Part Code : HE00105) • FUSE (Part Code : HD00115) • REMOVABLE TERMINAL PLUG (3 PINS) (Part Code : HC01567) •...

  • Page 15: Exploded View And Parts Lists

    MODEL DA-150EH-AM 9. EXPLODED VIEW AND PARTS LISTS Part Code Description MB08879 CHASSIS MA13127 PANEL NI09353 ACRYLIC MI06874 FIXED BRACKET MG00245 COPPER PILLAR HE00105 HC01198 AC INLET MC01700 TOP COVER HK19860 PCB ASSY, LED HK22252 PCB ASSY, PRE AMP HK20265...

  • Page 16: Replacing The Repair Parts

    MODEL DA-150EH-AM 10. REPLACING THE REPAIR PARTS • REMOVAL PROCEDURE OF THE TOP PANEL OF DA-150EH-AM 1. Remove 11 screws from the top panel. 2. Remove top panel. - 21 -...
  • Page 17 MODEL DA-150EH-AM • REPLACEMENT OF FUSE (Part Code : HD00115) 1. Open the fuse box of rear side of amplifier. (Beside AC inlet) 2. Replace the fuse and close it. While using minus driver etc. - 22 -...
  • Page 18 MODEL DA-150EH-AM • REPLACEMENT OF PRE AMP PCB (Part Code : HK19863) 1. Disconnect 5 cables and remove 4 screws from top of PCB. 2. Replace the PRE AMP PCB and connect 5 cables. 3. Lock the 4 screws back.
  • Page 19 MODEL DA-150EH-AM • REPLACEMENT OF POWER AMP PCB (Part Code : HK21007) 1. Disconnect 4 cables and remove 4 nuts from the heat sink. 2. Replace the POWER AMP PCB and lock the 4 nuts back. 3. Connect 4 cables back.
  • Page 20 MODEL DA-150EH-AM • REPLACEMENT OF LED PCB (Part Code : HK19860) 1. Remove 4 screws from side panel. 2. Remove 3 screws from the bottom. 3. Disconnect 1 cable and remove 8 screws from top of PCB. 4. Replace the LED PCB and connect the cable and lock the screws back.
  • Page 21 MODEL DA-150EH-AM • REPLACEMENT OF PF PCB (Part Code : HK20265) 1. Disconnect 6 cables. 2. Remove 3 screws from top of PCB 3. Replace the PF PCB and connect all cables and lock the screws back. - 26 -...
  • Page 22 MODEL DA-150EH-AM • REPLACEMENT OF FAN (Part Code : HE00105) 1. Disconnect the cable. 2. Remove 2 screws. 3. Replace the FAN and connect cable and lock the screws back. - 27 -...

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