SHARP 29FPA330
Manual de Servicio

PIF CHECKING CONVERGENCE ADJUSTMENT

NO POINT ADJUSTMENT CONDITION / PROCEDURE WAVEFORM OR REMARKS 1 RF-AGC (1) Receive "PAL COLOUR BAR" signal. 1 CONVERGENCE ADJ

TAKE OVER POINT Signal Strength: 54 ± 1dBµV (75 ohm termination) (1) Receive the " Crosshatch Pattern" signal. ADJUSTMENT (2) Connect the oscilloscope to TP53 (Tuner's AGC Terminal) as shown in figure 3. ( To be done after the X axis (I2C BUS CONTROL) purity adjustment.) (2) Using the remote controller, call NORMAL mode.
TP51

+ OSCILLOSCOPE

( Static convergence ) Y axis

0.1V 1.0V

-

1. Overlap blue red with open-/closing angle and rotation of the 4 pole

magnet. R B
TV SET 6 pole magnet.

+ 2. Overlap green on blue red with open-/closing angle and rotation of the

BIAS BOX

Bias Box : about 4.5V ( Dynamic convergence )

Fig. 3 1. Fix wedges in a position so that deflection york neck is at the center of Fig-1

top bottom left right. ( Straight line and without any blur horizontal / vertical Adjust by VR1

(3) Select "RF-AGC" item in Mode. Adjustment the "RF-ACG" line).

bus data to obtain Tuner output pin drop 0.1~1.0V below maximum voltage. 2. Adjust Red, Blue, upper and lower of centre y axis on the screen by using

(4) Change the antenna input signal 63~74dBµV, make sure there is no noise. (Refer to fig.1 and fig.2)

Volume (VR2, VR1)at the deflection york. R B 3. If Horizontal Red, Blue(XV) on screen centre X axisis shifted, correct the (Refer to Fig. 3) 4. After confirm that there is no problems the entire screen ,bond each wedge on Fig-2 CRT glass tape on it. Fastening the screws of DY and magnet unit Adjust by VR2 (purity , 4 6 pole ), then coat the lacquer paint on DY fastening screw and

(5) Turn up the input signal 90~95dBµ V to be sure that there is no cross modulation beat. Red, Blue (XV) by adjusting balance coil on the deflection york.

PURITY ADJUSTMENT magnet unit fastening screw.
6-Pole Magnet . CRT NECK 1 PURITY ADJ. (1) Select green monocolor screen with remote contoller, and set the beam current of VR1

NO POINT ADJUSTMENT CONDITION / PROCEDURE WAVEFORM OR REMARKS

1.7mA with the contrast control.

(2) Degauss CRT enough with the degausing coil. a b R B

(3) The purity magnet must be previously set at 0 magnetic field, and the Fig3

Note: Follow job instruction manual to adjust the magnetic field. VR2
25mm + 0.5mm

(4) Observe points a,b, as shown in Fig.1-1 through the microscope. 4-Pole Magnet Balance Coil

convergence must adjusted to be rough. 90 mm 90mm Adjust by Balance Coil With P-MAG, adjust it to the center rank A. Fig. 1 -1 Purity Magnet Lacquer

Move DY fore and aft to set landing at the point (Rank A).

(5) If a/b balance is poor, compensate it to the center "Rank AB". (note) (6) Aline it to zero, keeping raster rotation in the east direction. A In case poor convergence adjustment on top bottom and of the screen , (7) T ighten the deflection coil fastening screws. A=B adjust DY by swing rightward and leftward.

(8) Checking CRT corner area, bond magnetic sheet to set the landing at Fig 1 -2 . Rank A (On the right of CRT)

Tightening torque : 108N 20N ( 11Kgf ± 2Kgf ) B (Refer to Fig-4)

rank A for compensation.

13
B

Note: Apply adjustment after aging with the beam current 1700±50µA or more

for 30 minutes or more.

Note: Select service mode, and press the monocolor key of R/C for process, A Fig-4

and the monocolor screen (green) will be selected. A=B Adjust by Swing DY

* Every push of monocolor key, changes the screen as follows.

olor mono color GREEN BLUE RED Fig. 1 3 . Rank A (On the left of CRT). NO POINT ADJUSTMENT CONDITION / PROCEDURE WAVEFORM OR REMARKS SCREEN 1 FOCUS 1. Receive E-5CH (Monoscop pattern). *Continuously press the monocolor key

FOCUS ADJUSTMENT

Monocolor screen 1 second or more, and the monocolor mode 3. Adjust focus VR to make the character"575" on left bottom of monoscope release will be selected without the service mode. fine as possible. *Even with TEXT key or "R/G/B" key, it can be directly switched to each monocolor screen. CUT OFF, BKGD, SUB-CONT ADJUSTMENT
NO POINT ADJUSTMENT CONDITION / PROCEDURE WAVEFORM OR REMARKS

ADJUSTMENT 2. With remote controller, make the image normal.

2 UNIFORMITY Before adjustment begin,Horizontal magnetic field = 0G 1 CRT CUTOFF Note :
a) A063 CUT-RS = 32 (To perform after the Make sure to degauss it. (I2C BUS CONTROL)

Vertical = Each destination's adjustment magnetic field ADJUSTMENT 1. Before CRT cutoff adjustment, make sure following items are in INITIAL DATA.

purity and b) A064 CUT-GS = 32 convergence (North direction red uniformity) c) A114 CUT OFF = 6 adjustment) (1) Horizontal mf = Set monocolor screen red and adjust to +0.25G.

(2) Pay attention edge of CRT,if landing is poor adjust by attaching the (1) Switch TV to mode blue back off , with no video signal Mislanding (2) Go to service at adjustment mode item A115 (VG2).

compensation magnet at the back of CRT. (CRT surface) and Press R/C to set picture into normal condition (refer to Fig-1)

(South direction red uniformity) (3) Adjust screen voltage until retrace line appear, the following OSD will appear at bottom of (1) Horizontal mf = Set monocolor screen red and adjust to -0.25G. screen. (2) Pay attention to edge of CRT ,if landing is poor adjust by attaching the UNSTABLE

OUT compensation magnet at the back of CRT. ABOVE

(The same method is applied adjustment of monocolor screen blue for (4) Finally , slowly decrease the screen variable resistor until following OSD appear. blue uniformity ,and changing both the magnetic field for north and south STABLE direction.) (CRT back) IN
* The last OSD row is indication of the screen voltage value. If it show "BELOW", Make sure there is no blur or bendlines occur.

ABOVE / BELOW *

*During pasting of , use the crosshatch pattern . compensation magnet

If blur or bend are serious,adjust the location of compensation magnet Fig-1 please increase the screen voltage and vice versa until "STABLE" AND "IN" OSD appear. to make it better.

Note : No matter the indication of last row's OSD is indicate "ABOVE" or "BELOW", the important thing is OSD change to "STABLE" and "IN".

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