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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Thursday, 28 March 2019

SONY STR-KS380 AV RECEIVER– HOW TO ENTER SERVICE MODE – ADJUSTMENTS – SMPS SECTION CIRCUIT

Power Supply Circuit Diagram – Digital Power Amplifier Circuit Diagram - Service Mode – Initialize – Version check – Key Check – SONY STR-KS380 AV Receiver.

Used ICs: STR-F6168-LF1352 or STR-F6138-LF1352 – STR-V153 – CXD9981TN (Digital Power Amplifier)

POWER OUTPUT (rated)
FRONT L + FRONT R 108 W + 108 W (at 3 ohms, 1 kHz, 1% THD)
POWER OUTPUT (reference) FRONT L/FRONT R/CENTER/SUR L/ SUR R 167 W (per channel at 3 ohms, 1 kHz)
SUBWOOFER 165 W (at 3 ohms, 60 Hz)
Inputs
Analog Sensitivity: 1 V/50kohms
Digital (Coaxial): Impedance: 75 ohms

CND : Canadian model

AR : Argentina model

EXPLODED VIEWS

HOW TO ENTER THE SERVICE MODE

> Press [POWER] button to turn the power on.
> Press the button in order of [TUNER] > [RETURN] > [ENTER] > hold [SHIFT] button ([0] > [1] > [0]) > [SOUND FIELD +]
> The message “SERVICE” appears.
> Press [ENTER] > hold [SHIFT] button ([X]*>[X]*) > [ENTER], selected test mode will activated. *[X] refer to test code.
> Press [AMP MENU] > [DISPLAY] to return to “SERVICE” menu. Repeat step 4 to re-enter test mode.
> Repeat step 2 to turn off service menu.

VERSION
* While still in the Service Mode, press [AMP MENU] > [DISPLAY] to return to “SERVICE” menu.
* Press [ENTER] > hold [SHIFT] button ([0] > [3]) > [ENTER].
* The message of model name, destination, and software version are displayed.
* Each time press [DISPLAY] button, the message “H.VER x.xx” and “SVER x.xx” appear one after another and return to model name, destination, and software version.

HISTORY MODE
> While still in the Service Mode, press [AMP MENU] > [DISPLAY] to return to “SERVICE” menu.
> Press [ENTER] > hold [SHIFT] button ([1] > [3]) > [ENTER].
> The message “HISTORY” appears.
> Each time the [▲/▼] button on the remote commander is pressed, the item is switched in order as follows.

FL CHECK
While still in the Service Mode, press [AMP MENU] > [DISPLAY] to return to “SERVICE” menu.
Press [ENTER] > hold [SHIFT] button ([0] > [4]) > [ENTER].
ALL segments light on.

KEY CHECK
While still in the Service Mode, press [AMP MENU] > [DISPLAY] to return to “SERVICE” menu.
Press [ENTER] > hold [SHIFT] button ([1] > [0]) > [ENTER].
The message “REST 03” appears. “REST 03” value decrease whenever a button on the set is pressed. However, once a button has been pressed, it is no longer taken into account. All buttons on the set is pressed, “REST 00” is displayed.

All preset contents are cleared when this mode is activated. Use this mode before returning the product to clients upon completion of repair.
While still in the Service Mode, press [AMP MENU] > [DISPLAY] to return to “SERVICE” menu.
Press [ENTER] > hold [SHIFT] button ([1] > [2]) > [ENTER]
The message “CLEARED” appears, the set turns off.

SP OUT (MIC Test)
While still in the Service Mode, press [AMP MENU] > [DISPLAY] to return to “SERVICE” menu.
Press [ENTER] > hold [SHIFT] button ([1] > [8]) > [ENTER].
The message “MIC” appears.
Repeat step 1 and 2 to toggle between “MIC” and “SOURCE”.
SOURCE : normal mode
MIC IN : mode that output audio from mic input.

INITIALIZE
> Turn off the receiver.
> Hold the [Power] for 5 seconds.
> The message “CLEARING” appears on the display.
> After a few seconds, “CLEARED” appears.

DIGITAL POWER AMPLIFIER CIRCUIT DIAGRAM