Instruction manual

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PHASE DETECTOR
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INPUT
O.ZV TO 1.0VP'p T
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NOTE5
.I
C169 -
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ov
WAVEFORM AT U2.13 HAS SAME PHASE AS RF
INpUT CURRENT. OUTPUT OF U20 IS A SOUARE
WAVE.
0.9V-,-
-+....
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R32
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U3 FUP-FLOP OUTPUTS
USD OUTPUT IS LOW I
CAPACITIVE. USD OUTP,
PHASE IS INDUCTIVE.
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VOLTAGE ACROSS
THE REVERSE pOw
VOL TAGE IS APPLIE
.05
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2.2K
0.2VTOt.6VP'P:'/\/\/ ~
NOTE 5
WAVEFORM AT UI.SHAS SAME PHASEAS RF .LCISS .LC168
INPUTVOLTAGEOUTPUTOFUIDISASOUARE
1
.05
1
.05 0.9V-,
mm
- - -
WAVETHATISAPPUEDTOU3CLOCKINPUT.- -
- - -+- - - --
CHANNEL CHANGE CIRCUIT ~IT s
B
VOLTAGE ACROSS CI2
THE FORWARD POWER
PUT. VOLTAGEISAPPu/
.SV
..
'SV
CHA~~E~ I~~:~~ >BLU
PULSE APPLIED BV RADIO WHEN CHANNEL IS"
CHANGED BYCHANNEL SELECTOR SWITCH.
DURING CHANNEL CHANGE PULSE O32/S OFF.
033 IS ON. CI82 IS CHARGING; 028-030 ARE
TURNED ON APpL YING A LOGIC LOW TO U8-34
AND U/!-39TO 'NHIBIT THE START OF THE TUN.
ING SEOUENCE DURING CHANNEL CHANGE
APpROX,MA TEL Y 0.5 SEC AFTER THE FALLING
EDGE OF THE CHANNEL CHANGE PULSE CI82
IS SUFFICIENTL Y DISCHARGED TO TURN OFF
028.030.
RI20
~
10K
s.OV-~
'.3V-
ANT TUNE} vIa
0.4 V DURING TUNiNG SEQUENCE
""- 3.3 V DURING RECEpTION OF B CHANNEL
\...l. 12 V DURING RECEPTION OF A CHANNEL
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031
M9642
_C'7
1.05
VOLTAGE CONTROL AND REGULATION
SWITCHEDA+ ,.GRN
~
30
_C16'
1.01
L9
~
30
VR'
,OV
R~
IK
VRI9
TPI'
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~o~~~::s
1.05
L2 = TO
~UI-I
100 .LCT UI-IS
L3 1:.05 TO
U'-I
CIJ u,-.s
1.05
LA2 = TD
~U8-'0
1..7
'5Y =
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IGNITION A', "'HT
<NOTUSED>
RAS
--
ISO1CA'
CR. 1.05
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10.2'
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0.75 At1F'"
VRIT
S.6V
nna Tuner
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EPS-30253-A
029
'sv
M9642
tR27
'.7K
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M9642
1.001
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JRJ8
10K
10K