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SHARP 37GT25H
Service Manual


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

Description of SHARP 37GT25H 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.

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Text excerpt from page 9 (click to view)
37GT-25H

•GEOMETRY ADJUSTMENT PROCEDURE
1. HOR POS a) Receive Philips pattern signal. b) When ∧ button is pressed, picture moves to the left. c) When ∨ button is pressed, picture moves to the right. d) Adjust the horizontal location to obtain picture centering (Fig.1). 2. VERT POS a) Receive Philips pattern signal. b) When ∧ button is pressed, picture moves up. c) When ∨ button is pressed, picture moves down. d) Adjust the vertical location to obtain picture centering (Fig.2). 3. VERT AM a) Receive Philips pattern signal. b) When ∧ button is pressed, vertical size of picture increases. c) When ∨ button is pressed, vertical size of picture decreases. d) Adjust the vertical size to obtain picture overscan (Fig.3). 3. VERT SLOP a) Receive Philips pattern signal. b) When ∧ button is pressed, upper picture scanning decreases and lower picture scanning increases. c) When ∨ button is pressed, upper picture scanning increases and lower picture scanning decreases. d) Adjust the vertical symmetry to obtain symmetrical scanning between upper and lower picture (Fig.4).
Fig. 4 Fig. 3 Fig. 2 Fig. 1

•COLOUR ADJUSTMENT PROCEDURES
1. Y-DLY a) Receive Philips pattern signal. b) When ∧ button is pressed, luma phase delays. c) When ∨ button is pressed, chroma phase delays. d) Adjust the chroma-luma delay. 2. «B-GAIN», «G-GAIN», «R-GAIN» a) Adjust G2. b) Tune a white pattern c) Adjust colour to minimum. d) Position colourmeter in the center of screen. e) Using brightness and contrast buttons, select a luminance of ≈120 nits. f) Operate again in Service Mode and select location R-GAIN and B-GAIN to obtain colour coordinates: X = 0.290 ± 0.015 Y = 0.284 ± 0.015 g) Exit Service Mode and check colour coordinates «X» and «Y» at 20 and 120 nits. It may be necessary to repeat the same procedure or re-adjust the cuts as show the be below one.
NOTE: Locations «R» alter «X» coordinates; «G» alter «Y» coordinates; «B» alter «X» and «Y» coordinates.

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