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.
-"'-.
PHASE
DETECTOR
Rr
{
INPUT
O.ZV
TO
1.0VP'p
T
-*- j\!\!\,
NOTE 5
.I
C169
-
.os
I
.J.U.
ov
WAVEFORM
AT U2.13 HAS
SAME
PHASE
AS RF
INpUT
CURRENT.
OUTPUT
OF U20 IS A SOUARE
WAVE.
0.9V-,-
-+....
R97
II<
R32
1.51<
R99
II<
Rl10
~
.TI<
D
U3 FUP-FLOP
OUTPUTS
USD
OUTPUT
IS LOW
I
CAPACITIVE.
USD OUTP,
PHASE
IS INDUCTIVE.
R98
II<
RIOO
tl<
VOLTAGE
ACROSS
THE REVERSE
pOw
VOL TAGE IS APPLIE
.05
RI.
2.2K
0.2VTO t.6VP'P:'/\/\/
~
NOTE 5
WAVEFORM AT UI.S HAS SAME PHASE AS RF .LCISS
.LC168
INPUTVOLTAGEOUTPUTOFUIDISASOUARE
1
.05
1
.05
0.9V-,
mm
- - -
WAVE THATISAPPUED
TOU3CLOCKINPUT.
-
-
-
-
-+- - - --
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
RI"
----..
IOK
031
M9642
_C'7
1.05
VOLTAGE
CONTROL
AND REGULATION
SWITCHEDA+ ,.GRN
~
30
_C16'
1.01
L9
~
30
VR'
,OV
R~
IK
VRI9
TPI'
.
S\A
TO
~o~~~::s
1.05
L2
=
TO
~UI-I
100
.LCT UI-IS
L3
1:
. 05 TO
U'-I
CI J u,-.s
1.05
LA2
=
TD
~U8-'0
1..7
'5Y
=
loa
IGNITION A', "'HT
<NOTUSED>
RAS
--
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1
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CR. 1.05
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7.
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""
0.75 At1F'"
VRIT
S.6V
nna Tuner
-am
EPS-30253-A
029
'sv
M9642
tR27
'.7K
030
t:-
M9642
1.001
,sv
Rl"
JRJ8
10K
10K
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