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

DAEWOO DTT3250, DTT3250MT CTV - HOW TO ENTER SERVICE MODE, ADJUSTMENTS, SMPS, DEFLECTION AND AUDIO OUTPUT CIRCUIT DIAGRAM

Daewoo DTT3250, DTT3250MT CTV - How to enter service mode, adjustments, SMPS, deflection and audio output circuit diagram


STR X6757 (SMPS control), TDA8172A (Vertical output IC), BSC29-0185F (FBT)
THE ADJUSTMENT METHOD OF CP-750 WITH USER ROMOTE CONTROLLER (R-49C05)
Service Mode
To enter the service mode, press Red button and Green button and MENU key on (Ch.91)
Service Mode 1 is displayed. 
Press MODE key.
Service Mode 2 is displayed.
CONTROL KEY
MENU -  Return to former step
OK - Exit service mode
PR ▲/▼ - Select item
VOL ▲/▼- Change value or condition
SCREEN ADJUSTMENT
Service Mode 1 > DDPC 3316_1 > Screen
Adjust Screen Volume of FBT until the horizontal line is just disappeared.
FOCUS ADJUSTMENT
Adjust with the Focus volume on the FBT until you get the most clear resolution of 350 line
and corner of screen.
Focus volume on the FBT is consisting of two parts - vertical focus and horizontal focus.
WHITE BALANCE ADJUSTMENT
(1) High-Beam Adjustment
Service Mode 1 > Tube Measurement > WD_R, WD_G
Adjust R,G bars in the high beam on the instrument may be located in the center.(B DRV is Fixed.)
(2) Low-Beam Adjustment

Service Mode 1 > Tube Measurement > CUT_R, CUT_G
Adjust R,G bars in the low beam on the instrument may be located in the center.(B BIAS is Fixed.)
[The reference coordinates are X = 288, Y = 302”] PWB bottom view, SMPS and deflection schematic




VERTICAL CENTER Adjustment
Service Mode 1 > Vertical Geometry > Ver. Center
Adjust to harmonize RETMA pattern’s upper marking with Lower marking.
VERTICL SIZE Adjustment
Service Mode 1 > Vertical Geometry > Ver. Size
Adjust so that the Upper and the Lower ‘4’ marks of the RETMA pattern may be located at the boundaries of the screen.
HORIZONTAL CENTER Adjustment
Service Mode 1 > Hor. Geometry > Hor. Center
Adjust to harmonize the position of RETMA pattern’s Left side with Right side.
HORIZONTAL WIDTH Adjustment
Service Mode 1 > Hor. Geometry > Hor. Width
Adjust so that the Left and the Right ‘5’ marks of the RETMA pattern may be located at the boundaries of the screen.
PINCUSHION Adjustment 
(1) Parabola Adjustment
Service Mode 1 > Hor. Geometry > Cushion
Adjust so that the Left and Right edge’s vertical line may be straight.
(2) Corner Top/Bottom or Top 6th/Bottom 6th
Service Mode 1 > Hor. Geometry > Corner Top/Corner Bottom or Corner Top 6th/Corner Bottom 6th
Adjust so that the Upper and the Lower corner’s vertical line may be straight.
(3) Trapeze Adjustment
Service Mode 1 > Hor. Geometry > Trapeze
(4) Angle Adjustment
Service Mode 1 > Hor. Geometry > Angle
(5) Bow Adjustment
Service Mode 1 > Hor. Geometry > Bow.
Posted By: FRANK at 10:02
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