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 1 February 2019

HOW TO ENTER SERVICE MODE, SMPS AND DEFLECTION SCHEMATIC - GRUNDIG CUC 2103 - DAVIO, LISSABON AND XENTIA MODELS CRT TVS

How to enter Service Mode, SMPS and deflection schematic - Grundig CUC 2103 - Davio, Lissabon and Xentia models CRT TVs

Grundig FS-STEREO CUC 2121/INL/DOLBY, Grundig TV STEREO CUC 2121/INL/DOLBY
Service Menu (Service Mode)
Call up the Service Menu with button "i" via "DIALOG CENTER" > "SERVICE" > Service Code .
Having entered the code number "8500" the dealer can change the following settings under menu guide:
* GEOMETRY
* WHITE ADJUSTMENT
* AGC
* AFC
* OSD horizontal
* OSD vertical
* Hotel
* OEM
* NTSC 3,6 (Optional)
Alignment
After any repair or replacement of NVM (IC82501) check whether the NTSC 3.58MHz quartz is fitted. If it is not, the dialog line "NTSC 3.6" in the Service Menu must be set to "off".
Button "i" > "OK" > SERVICE > "OK" > SERVICE Code "8500" > NTSC 3.6 "off" and in dialog line "End" store the setting "with mem.".
Keep the "Sub. Contrast" setting unchanged (factory setting)
Activating and deactivating the Hotel Mode
Call up the dialog line "Hotel" with button "i" via "DIALOG CENTER" > "SERVICE" > Service Code "8500".
With activated "Hotel Mode"
* it is no longer possible to call up the "DIALOG CENTER" menu with button "i".
* the last volume setting is stored as the maximum level possible.
Deactivating
Depress and hold button "i" on the remote control handset while switching the TV set on with the mains switch. 
Under the "SERVICE" menu switch the Hotel Mode off.
Deactivating the Protection Circuit
* Horizontal and vertical protection circuit:
connect the basis and emitter at CT50055.
* Horizontal protection circuit:
connect the basis and emitter at CT57113.
* Vertical protection circuit: to short out C50052.
Attention: When the repair is completed, it is absolutely necessary to activate the overload protection circuits.
Cancelling the Parental Lock Continuously
To cancel the parental lock enter the number 7038
Click on the schematics to zoom in
CRT Base card schematic
Audio output schematic
Deflection stage schematic
Processor stage schematic
SMPS schematic
Special Functions in the Dialog Center
Switching on with the last viewed program.
The channel position which has been selected when switching off is recovered when switching on again (last station memory).
Picture/Sound Options On or Off for all Programs.
Reach the "Pict./sound opt." menu via "DIALOG CENTER" > "SPECIAL FUNCTIONS" by pressing button "i". When selecting "off" the scales indicating the analog values do not appear.
Automatic Volume Control (option)
Reach the "Volume Limiter" dialog via "DIALOG CENTER" > "SPECIAL FUNCTIONS" by pressing button "i". The volume of stations with large deviation is adjusted to normal deviation when selecting "on".
Decoder Settings for Individual Program Positions
By pressing button "i" call up the "Decoder Pxx" dialog via "DIALOG CENTER" > "SPECIAL FUNCTIONS". With the < / > buttons it is possible to set an analog or digital decoder to be switched over internally or externally on a per-program basis for scrambled stations.
Forced Chroma Switching
Call up the dialog line "Color" via "DIALOG CENTER" > "SERVICE" with button "i". With the buttons < / > it is possible to force the automatic chroma standard switching function into "PAL","SECAM" or "NTSC" on a per-program basis under poor reception conditions.
Posted By: FRANK at 23:10
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