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 !

Saturday, 30 March 2019

GOLDSTAR MV1615W MICROWAVE-OVEN - SCHEMATIC

Circuit diagram for Goldstar MV 1615W - Microwave Oven

SPECIFICATIONS

Rated Power Consumption .................................... 1,500W maximum (Microwave oven+Cook top lamp+Ventilation fan)
Microwave Output .................................................. 1,000W (IEC 60705)
Adjustable 100W through 1000W, 10 steps
Frequency .............................................................. 2,450 MHz ± 50 MHz
Power Supply......................................................... 120 VAC, 60 Hz
Rated Current ........................................................ 13 Amp. (Microwave oven+Cook top lamps+Ventilation fan)
Magnetron Cooling................................................. Forced Air Cooling
Rectification ........................................................... Rectification Voltage Double Half-Wave
Door Sealing ......................................................... Choke System
Safety Devices ...................................................... Oven Cavity Thermostat:
Open at 90°C±5°C
Fuse(20A)
Primary Interlock Switch
Secondary Interlock Switch
Interlock Monitor
Magnetron ............................................................. 2M214-39F
High Voltage Capacitor ......................................... Capacitor: 1.0µF, 2.1 KV AC
High Voltage ......................................................... Diode Diode; 350mA, 9.0 KV
Cook top Lamp ...................................................... 125 V, 30 W
Cavity Lamp .......................................................... 125 V, 30 W
Timer ..................................................................... Digital, up to 99 mim. 99 sec. (in each cooking stage)
Tray ....................................................................... Tempered Safety Glass
Overall Dimensions ............................................... 29 15 /16” (W)x16 7 /16” (D)x15 3 /8” (H)
Oven Cavity Size .................................................. 19 7 /8”(W)x14 3 /16”(D)x8 15 /16”(H)
Effective Capacity of Oven Cavity ......................... 1.5 Cu.ft.
Accessories ........................................................... Owner’s Manual & Cooking Guide, Installation Manual, Exhaust Adapter, Exhaust Damper, Mounting Kit and Two Filters, Rotating Ring Assembly.

PRECAUTIONS

SINCE NEARLY 2,100 VOLTS EXISTS IN SOME CIRCUITS OF THIS UNIT REPAIRS SHOULD BE CARRIED OUT WITH GREAT CARE.
The filament leads of magnetron carry High Voltage with respect to ground. Extreme caution must be exercised. Never plug the unit into a power source to determine which component is defective in high voltage section.

> Before the power is applied; (a) Make sure the primary interlock switch, the secondary interlock switch and the interlock monitor switch operate properly by opening and closing the door several by opening and closing the door several times. (b) Make sure the perforated screen and the dielectric choke of the door are correctly and firmly mounted.
> After power is applied; (a) Make sure the interlock switch mechanism is operating properly by opening and closing the door. (b) Check microwave energy leakage must
be below the limit of 5 mW/cm2 (All service adjustments should be made for minimum microwave energy leakage readings).

> Do not operate the unit until it is completely repaired, if any of the following conditions exist. The unit must not be operated. (a) The door does not close firmly. (b) The hinge is broken. (c) The door seal is damaged. (d) The door is bent or warped, or there is any other visible damage on the unit that may cause microwave energy leakage. [NOTE: Always keep the seal clean.] (e) Make sure that there are no defective parts in the interlock mechanism. (f) Make sure that there are no detective parts in the microwave generating and transmission assembly (especially wave-guide).

> The following items should be checked after the unit is repaired.
(a) The interlock monitor switch is connected correctly and firmly.
(b) The magnetron gasket is properly positioned and mounted.
(c) The waveguide and the oven cavity are intact.(no microwave energy leakage)
(d) The door can be properly closed and the safety switches work properly.
(e) The unit must stop when the door is opened or the time is up.
The unit must not be operated with any of the above components removed or by-passed.

SCHEMATIC and PWB