Instruction manual

DURING CAP PHASE
U6-9, 3.2 V
U6-&4.' V
DURmG IND PHASE
U6-9,4.' V
U6-8' 3.2 V
PUTS ARE APPLIED TO U6D.
ow IF RF INPUT PHASE IS
JUTPUT IS HIGH IF RF mpuT
.'"
OSS CI1 IS PROPORTIONAL TO
POWER A 7THE RF TUNER INPUT.
'PLIED VIA L7 TO U6C.
B
C12 IS PROPORTIONAL TO
WER A T THE TUNER RF IN.
'PLIED VIA R34 TO U6C.
"ANNEL CHANGE, 0 V
VSWR DETECTOR
=TZ
'SV
-c..
J.001
R.5
.31<
<::).'"
use ON TO DETECT '.5" VSWR
F
4.3 V TO DETECT2,' VSWR. 0 VOTHERWISE
G
4.3 V TO DETECT 1.5" VSWR, 0 V OTHERWISE.
M
IF AN A CHANNEL IS SELECTED, THE RADIO Ap.
PLIES A + TO THE ANT TUNE LINE. U5F APPLIES
A LOGIC LOW TO U8.3,. IF A B CHANNEL IS
SELECTED ANT TUNE LINE VOLTAGE IS LOW,
U5F A PPLIES A LOGIC HIGH TOUB.3,.
RZ7
'.71<
IFORWARDPOWER
LEVEL
RH
..
G
C.2.L ..Lc..
SW A' '510P'
~ ~
510P'
r - -- 1<2' ...!:.
c"' , : '8L H
_
1
.05' '0 \'\..J TP, U6-36VOLTAGE,
L -1- -f 0 VTOENABLE011-075
;D ;; O.BVTOENABLEO'B-OZ.
~ U8-;~-
R73 ANDazo
101< (VIA R8.
SASE VOLTAGE
'.4 V TO CLOSE RELA Y
0 no OPEN RELA Y
3.2VIFOI.'SOFF
D
DURING TUNING SEOUENCE.' IF RF INPUT
DROPS BELOW' WATT, UB-Z GOES LOW TO
TURN OFF USA, WHICH IN rURN srops THE
TUNING SEOUENCE. IF RF INPUT RISESASOVE
7 WA TTS. UB-' GOES LOW TO rURN OFF USA.
WHICH IN TURN STOPS THE TUNING SE.
OUENCE.
c
C5
8PF'
SW A' c.o..L.L c. I
IOOOPF'
~ ~
IOOOPF'
1
- -- Ki' E
-:~~ : : ~
JD
~ -1-~..J _TP5
~
R74
-w.
101<
TO
U8-24
AND 021
(VI< R85'
7.Z0 EA.VSS.PI0.PI2.PI3
TO 018 AND all '" CI20/CZ5 ZI P20 VCc'O TO L4Z
TO 019 AND alz CZ50/C50 Z2 PZI P2536
TO azo AND 013 C500/C'00 2. PZZ 'J/O C SHUNT
TO OZ I ANO alA CIOOO/CZOO Z. PZ'
TO aZ2 AND 0'5 CZOOO/CAOO .5 P24
.8 PZ7
37 PZ'
TO
U8-'5
AND azz
(VIA R8"
R7
101< OUTPUT OF U6C IS 5 V, UNTIL THE INPUT VSWR
IS THE SAME AS THE VSWR THA T THE TUNER
MICROPROCESSOR IS TUNING FOR, 4". 2". OR
'.5..1 AS DETERMINED SY U8-31. U8-32. WHEN
THE APPROPRIA TE VSWR IS ACHIEVED. ua..3IS
0 V.
\J. TUNE POWER DCTECTOR
'5V
RI28
'.71<
RZ6
'.71<
I Z DBO
13 OBI
" DBZ
15 DB'
16 DB.
11 OB5
18 OB.
!.!
VOO Z6 VDD
. RESET
. DET INF'D I TO
PDHER ACI< .. P 11
TUNED INPUT 39 T1
CHANNEL INF'D 28 PI I
TUNE 33 P 16
USA
RI27
Z71<
R58
'.3K
"',
0 V WHEN RF' INPUT POWER IS SETWEEN , AND
. WA TTS. 5 V OTHERWISE.
CAP. PHASE.. 0 V
IND. PHASE.. 5 V
..
0.2V
GROUNDING TPI1 AND TP,2 ENERGIZES ..
KB-K21 FOR SERVICING. .,
TUNE LINE CIRCUIT
-6
WHEN U8-33 GOES LOW. U7.15 GOES HIGH.
HIGH IS APPLIED TO usa. usa APPLIES A LOW
TO ANT TUNE LINE TliJACTIVA TE RADIO TUNE
MODE.
O.B V RELA Y CLOSED
13.B V RELA Y OPEN
E
H
'5V ...
R23 p
'.7K L
10
C4Z
I.05
5.8...10.I1.Z5 NOT L;
XTALI Co
U8
"I
C3
~
5:"5A5I<HZ'=
1~Pf' 1
~~I I
INT~T F'AST/SLO.
VCC27.2..30 TD '5V
XTAUI3
'5V
R25
..71<
P15[3Z
ELEMENTS
INIOUT
1.511 VSWR
p"l31
AIB
2"
VSHR
VRI
3..31<
1.3.5.9
~
U7E
K
GROUNDING TP12 ENERGIZES K,,"5. AND DE.
ENERGIZES KB-K15 AND K21 FOR SERVICING.
I
...
".
:.51<
'5V
1m
'.71<
"Z 1
.51<IC"'
; .001
R.
c.
.......
I
18.
8P,
CRZ
r
C.
C8
,.05
-if-
REVERSE
.7P,
POWER
R6
LEVEL
101<
L7
CII
100
J.001
--r
Q ..LC49J.001
R.
T
LI
IOO
, CR3
'.71<
CI
CRI
1.05
c.
HP,
TO aI 0--1l.!!.
TO a.----bJ.
TO al---'d
TO az----1d
TO a.----b1.
TO a.----hi
TO 05-----'=2.
TOO'----6.§.
TO a7--6L
TO a8-_L8