amplifier troubleshooting and repair pdf

Amplifier troubleshooting and repair pdf

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Electronic Equipment Repair Chapter 5 (Audio Amplifier System)

Bose Amp Replacement

Unit of competency details

There are four versions of Haas amplifiers. All four operate the same way. This decreases the risk of injury and mechanical damage. Some service procedures can be dangerous or life-threatening. DO NOT attempt a procedure that you do not fully understand.

Electronic Equipment Repair Chapter 5 (Audio Amplifier System)

There are four versions of Haas amplifiers. All four operate the same way. This decreases the risk of injury and mechanical damage.

Some service procedures can be dangerous or life-threatening. DO NOT attempt a procedure that you do not fully understand. Make sure the axis has a clear path of travel. Tools, part fixtures, or workpieces that are too large can crash into the machine enclosure.

Look at the machine's alarm history. Overload alarms followed by over current alarms are a sign of a crash. Look at the machine enclosure, spindle and tooling for damage. Damage to the tooling, fixtures and enclosure are signs of a crash. If there are no signs of a crash, inspect the ballscrew and linear guides. They must move or turn freely by hand. Check the amplifier for a short. Power off the machine. Disconnect the cables for the axis servo motor at the amplifier that generates the alarm.

The meter should show high resistance readings typically in the Kilo or Mega ohms. If the meter reads very low resistance the amplifier is damaged. If the meter does not show a voltage drop ranging from 0. Contaminated or pinched cables can cause a short. Replace the cables if necessary. Inspect the servo motor. Disconnect and inspect the power cable connector at the motor. Make sure that there is no coolant contamination.

Coolant contamination can cause this alarm and damage the amplifier. Measure the resistance from the pins labeled A, B and C at the motor connector to chassis ground.

The machine load is too high. Decrease the feeds to decrease the machine load. Examine the cutting tool for damage. Test the axis that generates the alarm. Write a program in MDI to move the axis. If any movement at any feed rate causes the alarm, then the servo amplifier is at fault. This voltage is critical to the correct operation of this amplifier. Make sure you do not short or cross your multimeter pins. If every axis amplifier in the machine generates the alarm at the same time, and the low voltage power supply is correct, then the Maincon or Mocon PCB may be at fault.

If the fan does not operate correctly, measure the voltage it receives. Disconnect the cable from the cooling fan. Measure the voltage between the leads of the cable. The correct voltage VAC. To make this site work properly, we sometimes place small data files called cookies on your device.

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Tool Management Tool Presetting Machines. Tooling Accessories Spindle Taper Cleaner. Spindle Test Bars. Haas Shop Lift. Tool Kits End Mill Kits. Indexable Milling Kits. Contact Us. My Cart. Find A Dealer. Introduction 2. Electrical Safety 3. Symptom Table 4. Mechanical Blockage 5. Amplifier Short Circuit Inspection 6. Servo Motor Short Circuit Inspection 7. Review the Part Program 8.

Low Voltage Inspection 9.

Bose Amp Replacement

Having finished your masterpiece, it is with some distress that you find that it doesn't work. Such failures range from instantaneous meltdown upon power-up remember the safety resistors I always suggest? Now you know why! It is not possible to write an article that covers every possibility, but hopefully the material presented here will get you underway with as little pain as possible. One of the points I have made in a number of places on my site is that if the project does not work, you have almost certainly made a mistake.

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FAULT. ASSUMPTION. CONFIRMED t. 7. YES. REPAIR. TEST CIRCUIT. FOR PROPER. OPERATION. DONE. Figure E Multistage amplifier troubleshooting​.


Unit of competency details

Email - Home Page. The powers that be have deemed that the Flash content on web pages is too risky to be used by the general internet user and soon, ALL of the support for it will be eliminated most Flash access was eliminated This means that no modern browser will display any of these demos, by default.

This guide also refers you to other Fix-It-Guides for more amplifier repairs. An amplifier is an electronic device that magnifies and controls audio signal sources from a built-in AM-FM receiver as well as an external CD player, tape player, or other audio home-entertainment device. The output signal is fed to audio speakers.

UW Chemistry Electronics Services

Time Required.

How Does an Amplifier Work?

Contents: 1. About the Author 2. Introduction 3. Here's the scoop 4. Four things to watch out for 5.

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Contents: 1. About the Author 2. Introduction 3. Here's the scoop 4. Four things to watch out for 5. Final Test 6.

How to Repair and Test Audio Power Amps

Unit Descriptor. This unit covers determining correct operation of basic amplifier circuits.

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