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

Friday, 29 March 2019

HARMAN KARDON HS200 HOME CINEMA SYSTEM – TROUBLESHOOTING – SMPS AND POWER AMPLIFIER SCHEMATIC

harman kardon HS200 HOME CINEMA SYSTEM – Troubleshooting – SMPS and Power Amplifier Schematic

SMPS _ Power Amplifier Circuit Diagram and General Troubleshooting _ harman kardon HS200 Home Cinema System [STA508_FAN7528MX_FAN7602_KTC8550 (FET)]
Power requirements: AC 230 V, 50 Hz
Max power consumption: 300 W
Idle power consumption: Less than 2 W
Dimensions (WxHxD): 350mm x 84mm x 250mm
Weight: 3.8 kg
If you experience any of the following difficulties while using the system, use this troubleshooting guide to help you remedy the problem.  Should any problem persist, consult your authorized Harman Kardon dealer.
No power.
* Is the power cord firmly plugged into the power outlet?
* One of the safety mechanisms may be operating. In this event, unplug the player from the power outlet briefly and then plug it in again.
No picture.
* Check that the system is connected correctly and securely.
* The video cable may be damaged. Replace it with a new one.
* Make sure the system is connected to a video input on the TV.
* Make sure the TV is turned on.
* Make sure the correct video input on the TV is selected for viewing with this system.
Noise (interference) appears in the picture.
* Clean the disc.
* If video from this system has to go through your VCR to get to your TV, the copy-protection applied to some DVD programs could affect picture quality. If you still experience problems after checking your connections, please try connecting your DVD system directly to your TV’s S-Video input, if your TV is equipped with this input.
The aspect ratio of the screen is wrong (picture vertically expanded) when you play a wide picture even though you set “TV DISPLAY” in the SETUP menu to "16:9".
* If you connect the system with the SCART cable, connect directly to the TV. Otherwise the auto-switch function of the aspect ratio for the TV may not work.
* If the TV is not connected with a SCART cable to the HS, or if the auto-switch function does not work you should turn the TV to "16:9" (if possible with your TV).
* Depending on the TV, you may not be able to change the aspect ratio. In that case (TV not adjustable to 16:9) do not select "16:9" in the TV Display. Then, no change of the aspect ratio is needed.
There is no sound or volume is very low.
> Check that the speakers and components are connected correctly and securely.
> Make sure that you have selected the correct source on the system.
> Press MUTE on the remote control, if the words MUTE ON are blinking on the front panel display.
> The protective circuitry has been activated because of a short circuit. Turn off the system, eliminate the short circuit problem and turn on the power again.
> The audio interconnect is damaged. Replace it with a new one.
> The system is in pause mode or in slow-motion play mode, or fast forward or fast reverse. Press ( > ) to return to normal play mode.
The left and right channels are unbalanced or reversed.
* Check that the speakers and components are connected correctly and securely.
Severe hum or noise is heard.
* Check that the speakers and components are connected securely.
* Check that the connecting cords are away from a transformer or motor and at least 3 meters away from fluorescent light.
* Move your TV away from the audio components.
* The plugs and jacks are dirty. Wipe them with a cloth slightly moistened with alcohol.
* Clean the disc.
The volume goes down automatically and cannot be increased.
The internal temperature is too high. Wait approximately one minute for the amplifier to reach normal working temperature.
Radio stations cannot be tuned in.
* Check that the antenna is connected correctly.  Adjust the antenna and connect an external antenna if necessary.
* The signal strength of the stations is too weak for automatic tuning. Use manual tuning.
* No stations have been preset.
* The tuner mode is not selected, select the Radio mode.
The remote does not function.
> Remove any obstacles between the remote control and the system.
> Move the remote control closer to the system.
> Point the remote control at the remote sensor on the front panel.
> Replace all the batteries in the remote control with new ones if they are weak.
> Check that the batteries are loaded correctly.
The disc does not play.
* There is no disc inside. (“NO DISC” appears on the front panel display and the TV screen.) * Insert a disc.
* Insert the disc correctly with the playback side facing down on the disc tray.
Clean the disc.
* DVD with wrong region code.
The system starts playing the DVD automatically.
The DVD features the auto playback function.
Playback stops automatically.
Some discs include an auto pause signal. When playing such a disc, the system stops playback at the signal.
Track Skip or direct select with numeric buttons, Search, Slow-motion play, repeat play or Program play, etc., cannot be done.
Depending on the DVD or VCD, some of the above operations may not be available.
Messages do not appear on the TV screen in the language you want.
Select the language for Display and Preferred Subtitle in the SETUP menu. For all messages from the DVD (DVD menu, subtitles) in the proper language the disc must have the language you selected, if not, another language will be selected.
The audio language cannot be changed when you play a DVD.
* Multilingual sound is not recorded on the DVD.
* Changing the language for the sound by the Audio button on the remote or the Audio line in the Player Menu is prohibited on the DVD.  In that case the audio language must be selected by the main menu on the DVD.
The subtitle language cannot be changed when you play a DVD.
> Multilingual subtitles are not recorded on the DVD.
> Changing the language for the subtitles by the Subtitle button on the remote or the Subtitle line in the Player Menu is prohibited on the DVD. In that case the subtitle language must be selected by the main menu on the DVD.
The subtitles cannot be turned off when you play a DVD.
Depending on the DVD, you may not be able to turn the subtitles off.
The angles cannot be changed when you play a DVD.
* Multi-angles are not recorded on most DVDs.
* Change the angles when the angle mark appears on the TV screen.
* Changing the angles is prohibited on some DVDs.
The system does not operate properly.
Static electricity, etc., may affect the system’s operation.  Disconnect the AC power cord, and then connect it again.
POWER AMPLIFIER SECTION CIRCUIT
SMPS CIRCUIT
CLICK ON THE PICTURES TO ZOOM IN
Posted By: FRANK at 05:07
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