SHARP 15E1FRU
Manual de Servicio

PURITY ADJUSTMENT ADJUSTMENT PRECAUTION
NO. Adjustment part Adjusting procedure conditions Waveform and others 1 PURITY ADJ. 1. Receive GREEN-ONLY signal. Adjust the beam current to about 700 µA. 2. Degauss CRT enough with the degausing

Make sure TV set is in �NORMAL CONDITION� before switch to service mode for Adjustment.

PIF ADJUSTMENT
a b NO. Adjustment part Adjusting procedure conditions Waveform and others coil.
netic field and keep the static convergence (PRESET) but with no signal input. roughly adjusted. Adjust the PLL data. through microscope. Adjust the landings to the tuner antenna. (RF SWEEP) 3. Adjust the sweep generator's to 80dBuV. » Tightening torque: 108N ± 20 N the tuner's IF output terminal. (This terminal Fig. 1 to A rank requirement.

1 Tuner IFT 1. Get tuner ready to receive the E-9 signal, 3. Maintain purity magnet at the zero mag10k 1n60 1000p 4. Observe the points a, b, as shown in Fig. 1-1 2. Connect the sweep generator's output cable

Oscilloscope IF OUT

Fig. 1-1

100k 75ohm

4. Connect the response lead (use LOW IMPED5. Orient the raster rotation to 0 eastward. (11kgf ± 2 kgf) must have the probe alone connected). A

ANCE probe with wave detector; see Fig.1) to 6. Tighten up the deflection coil screws. 7. Make sure CRT corners landing meet the 5. Set the RF AGC to 0 6 V with no saturation
P C 6. Adjust tuner IF coil to obtain the waveform sheet to correct it.

E-9 CH

A rank requirements. If not, stick the magnet with the waveform.

as shown in Fig. 2. Note:This adjustment must be done after -1.5+/-0.8dB warming up the unit for 30 minutes or longer with a beam current over Note: Be sure to keep the tuner cover in 700 µA position during this adjustment. * For the following colours press R/C RGB key to Rank "A" change. (on right of the CRT)
Green-only Blue-only Red-only

B A = B

Fig. 2

Fig. 1-2

2 RF-AGC 1. Receive "PAL COLOUR BAR" signal. Note:

7
The loss of using impedance adapter Fig. 1-3 Fig. 3 in NORMAL MODE, the colour

A TAKE OVER » Signal Strength: 57 ±1 dBµV (75 open) For the 50 ohm signal strength

POINT 2. Connect the oscilloscope to TP201 (Tuner�s gauge, when not using 50/75 Signal-colour ADJUSTMENT impedance adapter, signal screen cleared AGC Terminal) as shown in Fig. 3. (I C BUS strength is 52 ±1 dBµV(75 ohm B2 CONTROL) open), instead of 57 ±1 dBµV

Oscilloscope + TP201 (75 ohm open). A = B 0.1V � Precaution:

Bias box TV Set

+

Rank "A" (on left of the CRT)

�

» Bias box: About 4.5 V

* Press R/C RGB key for 1 second will change to RGB mono colour

3. Call "AGC" mode in service mode. Adjust the mode.

4. Change the antenna input signal to colours screen.

The TEXT "R. G. Cy" Key can "AGC" bus data to obtain the Tuner output pin drop 0.1 V below maximum voltage. be directly use change to other

63~67dBµV, and make sure there is no noise.

5. Turn up the input signal 90~95 dBµV to be

sure that there is no cross modulation beat.

15E1-FRU

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