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SHARP 14R2MK2
Service Manual


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

Description of SHARP 14R2MK2 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 8 (click to view)
14R2MK2 21R2MK2

CONVERGENCE CRT CUT-OFF, BACKGROUND AND SUB-CONTRAST ADJUSTMENT

No. point Adjusting procedure/conditions Waveform and others

CONVERGENC Receive the "Crosshatch Pattern" signal. 1 CRT CUTOFF 1. Switch TV to VIDEO mode,BLUE BACK OFF, with
2 3.0Vdc

ADJ. 2. Using the remote controller, call NORMAL mode. BGR ADJUSTMENT NO VIDEO signal. ( To be done (I C BUS 2. Press R/C to set Picture Normal condition.
G adjustment. 1. Turn the 4-pole magnet to a proper opening anIC801.(TP851(14")/TP852(21")) R

after purity STATIC CONVERGENCE B CONTROL) 3. Connect the oscilloscope to Red OUT from

gle in order to superpose the blue and red colours. Range : 1 V/Div (DC)
RGB R

2. Turn the 6-pole magnet to a proper opening anSweep : 5 msec/Div Fig. 5-1 3.0 Vdc ± 0.1 Vdc. 2 SUB-BRIGHTCall " SUB-BRI" in service mode. (Receive Cross1. Adjust convergence on fringes of the B Fig. 5-2 2 (I C BUS line 1, 2 and 3 have the same darkness the deflection coil upward.
B
0

gle in order to superpose the green colour over 1 V blue and red colours. 4. Adjust SCREEN VR ,so that the tip of signal reach

DYNAMIC CONVERGENCE G

screen in the following steps. NESS hatch pattern with 5 black level windows) a) Fig. 5-1: Drive wedge at point "a" and swing ADJUSMENT 2. Adjust the SUB BRIGHT " bus data in order that

1 3 5 b) Fig. 5-2: Drive the wedge at points "b" and "c" RGB CONTROL) wherelse 4 is slightly brighter than line 1, 2
3 finally line 5 will be brighter than and swing the deflection coil downward. G line 4. c) Fig. 5-3: Drive the "c" wedge deeper and swing R 1, 2, 3 are in same black level.

the deflection coil rightward. Fig. 5-3 2. Fix all wedges on the CRT and apply glass 3. Apply lacquer to the deflection yoke lock screw,
R G

d) Fig. 5-4: Drive the "b" wedge deeper and swing 3 WHITE BAL1. Receive the "WHITE" Pattern with BURST signal. Refer to Page 6.

the deflection coil leftward. ANCE SERV2. Press R/C to set Picture NORMAL condition. # 18000° K X : 0.255

ICE MODE 3. Connect DC miliammeter between the TP 602 Y : 0.255

tape over them. BGR ADJ. (I2C BUS ) TP 603 ( + ).

CONTROL) 4. Check Beam current should be around ( MINOLTA COLOUR ANALYZER

magnet unit (purity, 4-pole, 6-pole magnets) and B 800µA(14")/1100µA(21") CA-100) magnet unit lock screw. 5. Set it to service mode and adjust the DRI-GS, & *NOTE: Above DATA can be UP/ DRI-BS data to have a colour temperature of DOWN by volume key.

8
Wedge "a" cd/m2 (MINOLTA CA-100) by reducing 20"/21" 10cd/m2 120cd/m2 About 7. Adjust "CUT-R" & "CUT-G" to get color temperture * 18000° K 100¡ #. Then go back NORMAL mode (HIGH DRI-GC="DRI-GS"DATA-5 Lacquer range, back to (1).

Finally received the Red-only and Blue-only sig12,300°K or 7500°K ( white ). nals to make sure there is no other colours on the Fig. 5-4 6. Receive "WHITE" pattern, WITH BURST signal, LOW HIGH screen. and set BRIGHTNESS Y by generator, to ** 10 14" 10cd/m2 200cd/m2

LUMINATE Y signal.

BRIGHT**) to check colour temperature. If out of DRI-RC=27 Note: This adjustment must be done after
Wedge

warming up the unit for 30 minutes or longer with a beam current over "b" "c" 500µA(14")/700µA(21"). * ADJUST DRI-GC/GW, DRI-BC/BW as following DATA, after finishing DRI-BS and DRI-GS DATA
6-pole magnet DRI-RW=32 (FIXED), DRI-GW="DRI-GS"-7*, CRT neck DRI-BW="DRI-BS"-7*DRI-RC=25*, DRI-

4-pole magnet ADJUSTMENT.

BC="DRI-BS", DRI-GC="DRI-GS"-7* 4 Maximum 1. Receive the "Monoscope Pattern" signal. beam check 2. Press R/C to set Picture NORMAL condition.
Lacquer 40cm (21") and TP602 (â).

3. Connect the DC miliammeter between TP603 (+)
20cm (14") Purity magnet

(Full Scale: 3 mA Range)

4. Beam current must be within 800±100 µA(14")/

1100 ± 100 µA(21").

8-1 8-2

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