14E1-RU
bA = BA = B
ABAB
Fig. 4-1Fig. 4-2Fig. 4-3
Rank "A" Rank "A"
a
Waveform and others(on the left of the CRT)
(on the right of the CRT)
ond in NORMAL MODE, the colour will change to RGB mono colour mode.The TEXT Key "R. G. Cy" Key can be directly use to change to other colours screen.
*Press R/C RGB key for 1 sec-
AA.
m
2 kgf)
?Red-only
A.
m
Y signal. Adjust the
20 N (11 7-2
Adjust the landing to the?
T corners landing meet the Blue-only
Signal-colour screen cleared
justment must be done after
PURITY ADJUSTMENT
Adjusting procedure/conditionsjust the magnetic field.warming up the unit for 30 minutes or longer with a beam current over 500
Tightening torque: 108 change.Green-only
beam current to about 500 Note:Follow the Job Instruction Sheet to ad-field and keep the static convergence roughly adjusted.through the microscope. rank A requirements.Erank requirements. If not, stick the magnet sheet to correct it. Note:This ad*For the following colours press R/C RGB key to
1.Receive the GREEN-ONL2.Degauss the CRT enough with the degausing coil.3.Maintain the purity magnet at the zero magnetic4.Observe the points a, b as shown in Fig. 4-15.Orient the raster rotation to 0 eastward. 6.Tighten up the deflection coil screws.7.Make sure the CR
PURITY ADJ.
1
No.Adjusting point
IF OUT
1000p75ohm-1.5+/-0.8dB
V (75 ohm
m
1n60
E-9 CH1dB
?
Fig.1Fig.2
V(75 ohm open), in-
10k100km
P C
Waveform and others?1dB
strength gauge, when not using 50/75 impedance adapter, signal strength is 52stead of 57open).impedance adapter
OscilloscopeNote: For the 50 ohm signalPrecaution: The loss of using
V,
m
.
Adjust the
V to be sure
This terminalm
TP210
TV SetTuner output pin
V (75 ohm open)
mTP201(TunerOs AGC7-1
1 dB
?
Bias box: About 4.5 V
EFig. 3
+�
PIF ADJUSTMENT+�
Adjusting procedure/conditionssure to keep the tuner cover in position0.1V
Bias box
during this adjustment.Oscilloscope
Signal Strength: 57
signal,but with no signal input. Adjust the PLL data.the tuner antenna. ( RF SWEEP )ANCE probe with wave detector ; see Fig.1 ) to the tuner's IF output terminal. ( must have the probe alone connected ).the waveform.shown in Fig. 2.ETerminal) as shown in Fig. 3."AGC" bus data to obtain the drop 0.1V below maximum voltage.and make sure there is no noise.that there is no cross modulation beat.
1.Get the tuner ready to receive the CH. E - 92.Connect the sweep generator's output cable to3.Adjust the sweep generator's to 80dBuV4.Connect the response lead ( use LOW IMPED-5.Set the RF AGC to 0 - 6 V with no saturation with6.Adjust the tuner IF coil to obtain the waveform asNote:Be 1.Receive "PAL COLOUR BAR" signal.2.Connect the oscilloscope to 3.Call "AGC" mode in service mode. 4.Change the antenna input signal to 63~67dB5.Turn up the input signal to 90~95 dB
2C BUS
Tuner IFT ( PRESET )RF-AGC TAKE OVER POINT AD- JUSTMENT (ICONTROL)
12
No.Adjusting point
ADJUSTMENT PRECAUTION: Make sure TV Set is in "Normal Condition" before switch to service mode for adjust- ment.
7 |