Master Electronics Repair !

Welcome to Master Electronics Repair! website.Here you will find:Service Modes, Circuit Diagrams,Service manuals, Firmware Update procedure, Disassemble procedure, Universal remote control setup codes, Troubleshooting, Diagnosing, Measuring, and more.... of many of LCD/LED TV/Displays,others various electronic apparates,trough many technical notes and tips/tricks to help repairing/fixing Troubles/ faults,for electrical technicians.This site helps you to save the Earth from electronic waste!

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!

Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Wednesday 27 March 2019

BREMSHEY-SPORT ORBIT ELLIPTICAL TRAINER SERVICE HELP

BREMSHEY-SPORT_ORBIT ELLIPTICAL TRAINER_SERVICE HELP

OPENING UP COVER FOR REPAIR & ADJUSTMENT
To access the internal components of the Orbit it is necessary to remove one or both sides of the main cover sets. In order to do this it will be necessary to disconnect the foot tube from the rear drum axle. In general, access to the transmission is gained by removing left covers and brake system requires right-hand.

MODELS WITH FOOT TUBE HEIGHT ADJUSTMENT

Unscrew adjuster and allow tube to move to lower position.
Remove cap from rear axle (if applicable). Remove locking nut, washer and spacer. Withdraw foot tube assembly away from drum. If necessary rotate the drum until the tube eases off.

MODELS WITH OUT FOOT HEIGHT ADJUSTER

Remove cap from rear axle (if applicable). Remove locking nut, washer and spacer. Withdraw complete foot tube and swing arm assembly away from drum. If necessary rotate the drum until the tube eases away.

The covers can now be removed. Depending on the model concerned there may be more than one cover to remove. There are several screws located on the perimeter of the covers. Some of these locate into the frame and some into the lugs within the cover itself. (be aware of the screw positions and types. Note: Before removing the covers from a machine powered by mains transformer it will be necessary to remove the power socket from the rear of the cover. To do this, remove all screws. Reach inside the cover and grip the power socket whilst removing the thin nut from the outside of the socket and carefully withdraw the socket and cable assembly. Reverse procedure when work complete.

SPEED SENSOR AND RESISTANCE MECHANISMS

A reed/proximity switch mounted next to the left rear drum measures the speed of rotation. One or two small magnets are mounted in the rear drum and at each pass the switch opens and closes sending a ‘pulse’ to the meter either directly or via the control circuit board in the case of electro magnetically braked units.

RESISTANCE MECHANISM

There are 3 types of brake control used. The first 2 consist of a flywheel unit with an expanding and contracting central magnetic unit activated by a cable. These are controlled mechanically by the rotation of a control knob or electro-mechanically by use of a servo-motor. The third type is electromagnetic which employs an external coil which when powered slows the rotation of the flywheel.

MANUAL RESISTANCE CONTROL

There 3 basic components to this type.

Brake control knob

Brake flywheel mechanism

Cable connection (This may be located at the top of the tube or at the lower end depending on the model).

PROBLEM: Resistance can be achieved but max and min settings incorrect.

CHECK: Brake cable requires adjusting at the flywheel brake end, or:

Brake cable requires adjusting at connection between upper and lower cable.

Resistance doesn’t change or is not smooth: Check cable is moving freely at all points. Adjust cable or change parts as necessary.

The cable adjuster can be used to set the correct positions for maximum and minimum resistance. The securing nut should be released and the adjusting nut turned to increase or decrease the tension of the cable. Observe the position of the brake slider. When it is moved towards the center of the flywheel the resistance is at its least and further away the resistance is at its greatest.

SERVO MOTOR RESISTANCE CONTROL

The servo-motor is located next to the flywheel unit. When a resistance level is selected via the display meter, either by manual key presses or via a program change, power is supplied to the motor causing it to rotate, pulling the brake cable in or out depending on the rotational direction. In order for the servo-motor to operate the electronics must receive pulses from the flywheel speed sensor (See section on speed sensor). There is a slight delay between receiving the first pulse and the servo-motor operating. Therefore, in order to test the servo-motor brake mechanism the sensor must receive constant pulses by rotating the rear drum.

OPERATION

In order to test the servo-motor unit it is necessary to simulate the product in use. In models with a ‘Manual’ program (Control, Plus & Discovery) this can be achieved by rotating the rear drum by hand. Note: It can be made easier by removing the drive belt from the rear drum.

REPLACING SERVO MOTOR UNIT

First remove the servo-motor brake cable (a) from the flywheel brake mechanism. To achieve this, the tension must be released from the cable. In order to do this the securing nut (b) should be released and the adjusting nut turned to decrease the tension of the cable. Push the flywheel slider (c) down with a screwdriver and the release the outer cable sleeve (d) from the servo-motor securing point. Now lift the cable over the motor capstan (e) and then slide out the cable end from the capstan slot. Detach the electronic cables from the servo-motor to the wiring set. Undo the 4 screws (e) that mount the servo-motor to the frame and remove the motor unit.

Refit new servo-motor by reversing the above procedure. Taking care to refit the cable around the motor capstan in the correct direction and avoiding strain on the cable which may damage the motor gearing mechanism. It will then be necessary to calibrate the new motor.