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SHARP 14U20
Service Manual


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

Description of SHARP 14U20 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 7 (click to view)
PURITY CONVERGENCE ADJUSTMENT

No. Adjusment point Conditions/Adjusting procedure Waveform or others

PURITY ADJ. GREEN-ONLY Adjust 1 CONVERGENC 1. Receive the "Crosshatch Pattern" signal.

beam current to ~ 500 µA. ADJ. 2. Using the remote controller, call NORMAL mode. BGR

2. Maintain purity magnet at the zero magnetic ( To be done

a b B field and keep static convergence roughly after the purity STATIC CONVERGENCE
ours. through microscope. Adjust landing to the 2. Turn the 6-pole magnet to proper opening anA rank requirements. Fig. a

3. Observe points a, b, as shown Fig. 1-1 gle in order to superpose the blue and red col-

adjusted. adjustment.) 1. Turn the 4-pole magnet to a proper opening anG R

RGB 4. Orient raster rotation 0 eastward. gle in order to superpose the green colour over 5. Tighten up deflection coil screws. the blue and red colours.

Fig. 1-1

6. Make sure CRT corners landing meet the A DYNAMIC CONVERGENCE G

» Tightening torque: 108 20 N (11 ± 2 kgf) R

rank requirements. If not, stick magnet sheet 1. Adjust convergence on fringes of the B to correct it. screen in the following steps. A Note: This adjustment must be done after a) Fig. a: Drive the wedge at point "a" and swing
deflection coil upward. warming up the unit for 30 minutes or and swing the deflection coil downward. G

Fig. b

longer with a beam current over 500 µA. b) Fig. b: Drive the wedge at points "b" and "c" R G B B A = B the deflection coil rightward.
d) Fig. d: Drive the "b" wedge deeper and swing c) Fig. c: Drive the "c" wedge deeper and swing R

Fig. 1-2 the deflection coil leftward. Rank "A"
R

Fig. c 2. Fix all wedges on the CRT and apply glass tape over them. (On right of the CRT) BGR magnet unit (purity, 4-pole, 6-pole magnets) and B magnet unit lock screw. 3. Apply lacquer to the deflection yoke lock screw, G

7
A Finally received the Red-only and Blue-only sigB Wedge "a" A = B Fig. 1-3 Lacquer Rank "A" (On left of the CRT)

nals to make sure there is no other colours on the Fig. d screen.

About 100 Deg

Wedge "c" "b"

4-pole magnet 6-pole magnet CRT neck

(21") 20cm Lacquer

Purity magnet 40cm(14")

14U10/15 14U20/25

7-1 7-2

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