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GRUNDIG TF725211
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English, German
Price: $4.99

Description of GRUNDIG TF725211 Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

The manual is available in languages: English, German

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Text excerpt from page 17 (click to view)
ARCANCE 37, 55, 55 FLAT, 72 FLAT

Abgleich / Alignment

Alignment
Carry out the alignment with the unit at operating temperature (about 15 min.). All adjustment controls not mentioned in this description are pre-set at the factory and must not be re-adjusted in the case of repairs. Start of the Service Mode: Via "MENU" –> Service Code "8500". End the Service Mode: Press stand by button "6". Measuring instruments: 100MHz oscilloscop with 10:1 test probe, digital voltmeter, colour video generator. Service works after replacement or repair of the following modules: - Power supply: alignment 1 - IF: alignment 2, 3 - CRT, CRT panel: alignment 5…9 - Deflection: alignment 6, 7 - N201 (IF/Video/Chroma IC), N102 (EEPROM): alignment 2…5 and 7…9 - Tuner: alignment 2, 3

Alignment 1. +B voltage

Preparations

Alignment Process

This voltage must be checked and re-adjusted if necessary Adjust +B to the values below with VR601: after every repair and before every alignment. Size Voltage Value Brightness: Minimum P 37-5211 115V Contrast: Minimum T 55-5211 110V Digital voltmeter: Cathode VD624 TF 55-5211 115V TF 72-5211 130V Colour video generator: Feed in a test patter via the aerial. With L204 set the DC level to 3.4±0.1V. Digital voltmeter: IC N201 / Pin 47

2. AFT

3. AGC

Start the Service Mode; call up the dialog line "RF AGC" via With button V- oder V+ set the value to "20". menu 4 (button "4") with button P- or P+. Start the Service Mode; call up the dialog line "OSD H With button V- or V+, move the broadest menu to the DISPLAY" via menu 3 (button "3") with button P- or P+. picture screen centre. Start the Service Mode; call up the dialog line "SC" via With "SCREEN" control (lower control at the splitter menu 5 (button "5") with button P- or P+. transformer) adjust the line so that it is just well visible. Switch on the horizontal line with button V+. Colour video generator: Feed in a convergency test pattern. Contrast: maximum Set the screen brightness so that the black background of the test pattern just starts to brighten. With "FOCUS" control (upper control at the splitter transformer) adjust the vertical lines approx. 5cm from the right and left picture edge to minimum horizontal width. The sharpness in the middle must not seem to be worse than the sharpness at the edges. If necessary, take an average.

4. OSD

5. Screen grid voltage

6. Line sharpness

7. Geometry

Feed in a geometry test pattern. Start the Service Mode; call up menu 3 (button "3"). Select "H-PHASE" with button P- or P+. Adjust according to the test pattern using button V- or V+.

7.1 Horizontal position 7.2 Vertical position 7.3 Vertical size 7.4 Vertical linearity 7.5 S-correction

Select "V.POSI" with button P- or P+.

Adjust according to the test pattern using button V- or V+.

Select "V.SIZE" with button P- or P+. Select "V.LIN" with button P- or P+.

Adjust according to the test pattern using button V- or V+. Adjust according to the test pattern using button V- or V+.

Select "V SC" with button P- or P+.

Adjust according to the test pattern using button V- or V+.

GRUNDIG Service

2-3

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