Sharp DV-1600 Series User Manual

Step
Adjust .point
Connection
Procedure
4.
Overall waveform (1) Receive loch. signal.
(1) Check that overallwaveform is as shown
If reception of 10 ch. Signal is
in Fig. 7.
not satisfied, receive VIII band
signal instead.
(2) Connect sweep generator to
tuner’s test point. (Use an initial
stage detecting probe.)
Generator’s output level: 70 dB
1 (3) Connect response lead to TP203.
I
P-36.875MHz
(Use a 10k ohm direct probe
having been used in AFT rough
adjustment .)
(4) Voltage setting of RF AGC:
Apply DC 4V to tuner AGC.
S
RF AGC: about -20 dB
(5) Short TP601 and TP602 (to
stop sync separator circuit). Figure 7.
/ (6) Connect 120 ohm damping
resistor between pins @ and @
of IC201.
/ Note:Damping resistor leads should
’
/
I
be as short as possible.
; (7) F or adjustment of PIF AGC:
Connect DC voltage (about 5V)
/
to pin 13 of IC201 and adjust
so that waveform of TP203 is
at 1 Vp-p.
5.
AFT fine adjust:
/ (1) R
eceive
standard PAL colour bar
T203
signal.
Input intensity: Over 55 dB
i (2) Connect oscilloscope to TP203.
Oscilloscope range: O.SV/div.
Sweeing time : 20psec/div.
Sync operation: Horizontal
/ (3) Connect signal generator’s
output to TP201.
Generator’s output level:
Zero beating
About 50 dB.
Generator’s output frequency:
36.875 MHz f 5 kHz
StiDi f+
TP201
I 0201
Figure 9.
--1
r
I t--F
I
1PF
I
I
L
CF2Ol
T2b-;
i 1
’ x
To signal generator
Figure 8.
(4) Open tuning control door (lid),
then AFT switch will turn off
automatically.
(5) Adjust tuning control to’have
zero beating on oscilloscope as
shown in Fig. 9.
5

Sharp DV-1600 Series Specifications

General

Brand	Sharp
Model	DV-1600 Series
Category	TV
Language	English