21GT-22
V
m
IF OUT
1 dB
1000p75ohm-1.5+/-0.8dBV(75 ohm?
m
1n60
E-9 CH1 dB
?
Fig. 1Fig. 2
10k100k
P C
For the 50 ohm signal strength gauge, when not using 50/75 impedance adapter, signal strength is 52 open), instead of 57 (75 ohm open).The loss of using impedance adapter
OscilloscopeNote:Precaution:
) to
V to be
Fig.1m
.
TP201
V (75 ohm open)TV Set
mFig. 36-2
1 dB
?
.Fig. 3
Bias box: About 4.5 V
E
Fig. 2
PIF ADJUSTMENTService Mode for adjustment.+�V, and make sure there is no noise.
+�m
sure to keep the tuner cover in
position during this adjustment.0.1V
Signal Strength: 57 Bias box
signal, but with no signal input. Adjust the PLL data.to the tuner antenna. (RF SWEEP)ANCE probe with wave detector; see the tuner's IF output terminal. (This terminal must have the probe alone connected).with the waveform.as shown in E AGC Terminal) as shown in Oscilloscope"AGC" bus data to obtain the Tuner output voltage level at TP201 is drop 1 step data from maximum voltage.63~67dBsure that there is no cross modulation beat.
1.Get the tuner ready to receive the E-9 CH2.Connect the sweep generator's output cable3.Adjust the sweep generator's to 80dBuV. 4.Connect the response lead (use LOW IMPED-5.Set the RF AGC to 0 - 6 V with no saturation6.Adjust the tuner IF coil to obtain the waveformNote:Be 1.Receive "PAL COLOUR BAR" signal.2.Connect the oscilloscope to TP201 (TunerOs3.Call "AGC" mode in service mode. Adjust the4.Change the antenna input signal to5.Turn up the input signal to 90~95 dB
2C BUS
Tuner IFT (PRESET)TAKE OVER POINT ADJUSTMENT (ICONTROL)
ADJUSTMENT PRECAUTION:Make sure TV Set in "Normal Condition" before switch toNO.Adjustment partAdjusting procedure and conditionsWaveform and others12RF-AGC
PROM.
2
6-1
ITEMSDATA SETTINGDIGIT1SKIPOFF AFCONTINT0 (CENTER)
VOLUME1COLOUR0 (CENTER)
C-SYSTEMAUTO S-SYSTEMB/GCONTRAST60 (MAX)SHARPNESS0 (CENTER)ON TIMERIn-active, "--:--" OFF TIMERIn-active, "--:--"LANGUAGETHAILAST TV/AVTV
BRIGHTNESS0 (CENTER)WHITE TEMPSTANDARDLAST POWERPOWER-ONHOTEL MODEOFF
REMINDER TIMERIn-active, "--:--"BLUE BACK MUTEON0 CHANNEL SKIPON
LAST PROGRAM/CHANNEL1 FLASHBACK PROGARM/CH1
SHIPPING SETTING & CHECKING
(1)The following default data has been factory-set for the E
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