NO
ADJUSTMENT POINT
ADJUSTMENT CONDITION / PROCEDURE WAVEFORM OR OTHERS
1 RF-AGC (1) Receive "PAL COLOR BAR" signal.
* for Auto ADJ
TAKE OVER POINT
Signal Strength:
refer to *Note 1
1)Receive "PAL COLOR BAR" signal
ADJUSTMENT (2) Connect the oscilloscope to TP201 (Tuner's AGC Terminal) as shown in
signal strength :
refer to *Note 1
(I2C BUS CONTROL) figure 3-1. 1) Go to service mode.
OSCILLOSCOPE 2) Go to service data V01, press R/C to operate
(AUTO & MANUAL ADJ)
auto key (Hex C1) and confirm the 'OK'
display on the screen.
3) If appear NG, increase data some step and
pls repeat step 2.
BIAS BOX 4) Proceed step 4 & 5 in manual mode.
TV SET
Bias Box : about 4.5V
*Note 1
Fig. 3-1
(3) Call "
V01
" mode in service mode. Adjust the "
V01
" bus data to obtain the Tuner
output pin drop
0.1~1.0V
below maximum voltage.
21DXS200
63 ~ 67dBµV
(4) Change the antenna input signal to
*Note 1
, and make sure there
is no noise.
(5)Turn up the input signal to 90 ~ 95 dBµV to be sure that there is no cross
modulation beat.
FOCUS ADJUSTMENT
NO ADJUSTMENT POINT ADJUSTMENT CONDITION / PROCEDURE WAVEFORM OR REMARKS
1 FOCUS (1) Receive the "Monoscope Pattern" signal.
(2) Press RESET to set Picture NORMAL condition.
(3) Adjust the focus control to get the best focusing.
ADJUSTMENT PRECAUTION : Make sure TV Set is in "NORMAL CONDITION" before switch to Service Mode for Adjustment.
Focusing Point
(middle of center and
edge of monoscope
pattern)
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