REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

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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Monday, 25 March 2019

DENON AVR-790 _ AVR-590 _ AVR-1910 _ AVR-1620 _ AVR1610 _ SERVICE ADJUSTMENTS

DENON AVR-790 _ AVR-590 _ AVR-1910 _ AVR-1620 _ AVR1610 _ SERVICE ADJUSTMENTS





INITIALIZING 

AV SURROUND RECEIVER initialization should be performed when the μcom, peripheral parts of μcom, and Digital P.W.B. are replaced.
  1. Switch off the unit.
  2. With the "SURROUND MODE 0" and "SURROUND MODE 1" buttons pressed, press the "ON/OFF" button to turn the power on.
  3. Check that the entire display is flashing with an interval of about 1 second, and release your fingers from the 2 buttons and the microprocessor will be initialized.

If step 3 does not work, start over from step 1.
All user settings will be lost and this factory setting will be recovered when this initialization mode.  So make sure to m+emorize your setting for restoring after the initialization.

ERROR CHECKING MODE

Error mode (Displaying the protection history):
When started up, the error information is displayed.
Starting up:
For all models
  • With the "STATUS" and "MULTEQ" buttons pressed, press the "ON/OFF" button to turn the power on. The error (protection history display) mode is set.
  • Now, press the "STATUS" button to turn on the FL display

About the display on the FL display
  • When the "STATUS" button is pressed after setting the error (protection history display) mode, a history like the one shown below is displayed, depending on the conditions.

Clearing the protection history

There are two ways to clear the protection history, as described below.
  1. Start up the error (protection display) mode, display the error, then press and hold in the "ENTER" button for 3 seconds.
  2. Initialize.  # If you want to save a backup. 
AUDIO SECTION ADJUSTMENT
  • Idling Current
  • Required measurement equipment: DC Voltmeter.
Avoid direct blow from an air conditioner or an electric fan, and adjust the unit at normal room temperature 15 °C ~ 30 °C (59 °F ~ 86 °F).
Presetting
POWER (Power source switch) OFF
SPEAKER (Speaker terminal) No load.  (Do not connect speaker, dummy resistor, etc.)

ADJUSTMENT
  • Remove top cover and set VR1201 FL, FR, C, SL, SR, SBL, SBR on 7CH AMP UNIT at fully counterclockwise (c) position(1910/790 model).
  • Remove top cover and set VR1201 FL, FR, C, SL, SR on 5CH AMP UNIT at fully counterclockwise (c) position(1610/1620/590 model).
  • Connect DC Voltmeter to test points (FRONT-Lch: TP1201, FRONT-Rch: TP1205, CENTER ch: TP1203, SURROUND-Lch: TP1202, SURROUND-Rch: TP1204, SURROUND-BACK Lch: TP1207(1910/790 model), SURROUNDBACK Rch: TP1206 (1910/790 model)).
  • Connect power cord to AC Line, and turn power switch "ON". 
  • Presetting.
  • MASTER VOLUME: "---" counterclockwise (min.)
  • SPEAKER (Speaker terminal) : No load
  • (Do not connect speaker, dummy resistor, etc.)
  • MODE : 7CH STEREO (5CH STEREO)
  • FUNCTION : CD
  • Within 2 minutes after the power on, turn VR1201 clockwise (x) to adjust the TEST POINT voltage to 1.5 mV ± 0.5 mVDC.
  • After 10 minutes from the preset above, turn VR1201 to set the voltage to 2.0 mV ± 0.5 mV DC.
  • Adjust the Variable Resistors of other channels in the same way.
Posted By: FRANK at 03:45
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