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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Note that if you don't find what you searched for, try it after a period of time; the site is a never ending job !

..............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 !

Friday, 8 March 2019

YAMAHA YST-SW005 DISASSEMBLING AND CIRCUIT DIAGRAM

YAMAHA YST-SW005 disassembling and circuit diagram

YAMAHA YST-SW005

DISASSEMBLING AND

DISASSEMBLY PROCEDURES

Remove parts in the order as numbered.
For exchanging the driver unit
1. Removal of Front Grille
The front grille is fixed to the cabinet with dowels at 6 locations.
As a screwdriver (for slotted head screw) is used for removal, use special care not to cause damage to the cabinet.
a. Apply the block to the rear panel so as to avoid damage to the Terminal of the rear panel.
b. Use the screwdriver inserted in the gap between the front grille and the cabinet (bottom side first), push up the front grille.
c. Remove the front grille by lifting it up.
2. Removal of Driver unit and Replacement of LED
a. Remove 4 screws (1) in, and remove the Driver unit.
b. Disconnect the cord connected to the Driver unit.
c. Remove 4 screws (2) and pull out the port section forward. LED can then be replaced.

For repairing P.C.B.
1. Removal of Rear Panel
Remove 14 screws (2) in , and remove the rear panel. At this time, disconnect the connector CB5 of MAIN P.C.B. (1).
* When reassembling the rear panel which has been removed from the rear panel, be sure to replace the packing to prevent the air leakage.
2. P.C.B. Operation Check
Connect the connector CB5 of MAIN P.C.B. (1).

CONFIRMATION OF AUTO STANDBY OPERATION
Setting
1) Turn off the power switch.
2) In order to shorten the time required for operation check; connect a 10kOhm resistor at both ends of R60 on the MAIN P.C.B. (1).
3) Connect the output signal from the signal generator to the INPUT 2 of the unit.
4) Set the signal generator for the sine wave of 100Hz, 8mV.
5) Turn on the power switch.
Confirmation
1) Set the AUTO STANDBY switch to the LOW position.

2) Turn on the POWER switch. The display LED lights up (green) and its color changes to red after 5 to 10 seconds.
3) Turn off the POWER switch. The display LED goes off.
4) Set the AUTO STANDBY switch to the HIGH position.

5) Turn on the POWER switch. The display LED lights up (green) and its color remains unchanged even after time have elapsed.
6) Turn off the POWER switch. The display LED goes off.
After confirmation
1) Turn off the power switch.
2) Disconnect the 10kOhm resistor connected to both ends of R60.

CIRCUIT DIAGRAM

CLICK ON THE IMAGE TO ZOOM IN