Tandy Radio Shack Realistic PRO-2004 User manual


Step Control Setting Test Instrument Adjust Remarks
Chanel Programming Conneetion
6
OFF/vOLUME
control: Connect SignaIT7 IAlignment of 455 kHz IF coil I
ON Generator to TP1 and 1) Set the SignaIGenerator frequency
SQUELCH control:Oscilloscape, AC SSVM, to 4S.5 MHz,
Fully CCW Distortion Meter, SU
AM
: 60% MOD. at 1 kHz and
Channel Programming: Laad to EXT SPKR 100
IN
output
CH6
(120
MHz
-AM)
JACK. 2) Adjust T7
to
maximum sensitivity.
(Figure S)
7Same as step 6 Same as step 6 T8 IAlignment of
455
kHz AM DET. I
coil
1) Set the Signal Generator frequency
to 48.5 MHz,
AM: 60% MOD. at 1 kHz and
100 JlV
output.
2) Adjust T8 to minimum T.H.D.
point.
Figure 8 "
Sn
"LOAD
EXT
Á
SPKR
TP1
JACK
SIGNAL
-
UNIT
~ .
'
AC
GENERATOR
UNDER TEST ;0 SSVM
1
,L
~
OSCltLOSCOPE
.:
~
DISTORTION
METER
- 13 -


••SPECIFICATIONS ••
"
•
DESCRIPTION
NaM
INAl
SPEC.
LIMIT
SPEC.
Frequency Range 25
to
"520
MHz
760 to 1300
MHz
Sensitivity
NFM:
AM:
WFM:
Selectivity
NFM/AM
WFM
20 dB SIN
at
3kHz"DEV. 1kHz
25to
520 MHz
760
to
1100
MHz
1100
to
1300 MHz
20 dB SIN
at
60%
MaD.
1kHz
25
to
520
MHz
760
to
1100 MHz
1100
to
1300 MHz
30 dB SIN
at
22.5 kHz DEV. 1kHz
25to
520 MHz
760
to
1100
MHz
1100
to
1300
MHz
-6
dB
-SOdB
•
0.5
p.V
0.5
p.V
3.0
,."V
2.0,."V
2.0p.V
3.0
p.V
3.0
p.V
3.0
,."
V
10.0
p.V
±9
kHz
±15
kHz
•2.0
p.V
2.0
p.V
10.0
p.V
5.0
p.V
5.0
p.V
10.0
p.V
10.0
IlV
10.0
p.V
20.G·IlV
±12 kHz
±18 kHz
-6
dB
-SOdB
Modulation Acceptance:
EIA
R8-204·A
Spurious Rejection
at
328 MHz (NFM)
Image Ratio
at
70
MHz
(NFM) "
70
MHz
+
(2x61
0MHz)
=
1290
MHz
±150 kHz
±300 kHz
.:!:8
kHz
40
dB
35dB
±200 kHz
±4OQ
kHz
±5'kHz
35
dB .
25 dB
IF Rejection
610
MHz
at
70
MHz (NFM)
608
MHz
at
1000
MHz (NFM)
Signal
to
Noise Ratio
NFM/AM 3
kHz
DEV.
at
1
kHz
60%
MaD.
at
1
kHz
100
p.
VINPUT
WFM
40dB
40
dB
30dB
"
35dB
2.0
p.V
2.0
p.V
10.0
p.V
15
dB
•
45dB
60dB
SOdB
40 dB
0.5
p.V
0.5,."V
3.0
p.V
25
dB
•
25
to
520
MHz
760
to
1100
MHz
1100
to
1300
MHz
(S +N/N)
Tight
22.5
kHz
DEV.
at
1kHz
Squelch Sensitivity
NFM/AM
Threshold
•WFM
Threshold
•
Tight
Scanning Rate
•
25to
520 MHz
760
to
1100
MHz
1100
to
1300
MHz
(S +N/N)
Fast
Slow
3.0
p.V
3.0
p.V
10.0
p.V
40 dB
16 channel/sec.
8channel/sec.
10.0
IlV
10.0
p.V
20.0
IlV
30dB
•
14
to
18 channel/sec.
7
to
9channellsec.
-3-

•
•
Search Rate Fast
Slow
Residual Noise (Vol.
Min.)
Priority Sampling
Scan Defay Time
Audio
Output
Power (T.H.D. 10%)
Tape
Output
MaD.
and DEV: .
NFM
3kHz DEV.
at
1kHz
AM
60%
MaD.
at
1kHz
WFM
45 kHz
DEV.
at
1kHz
LDAD: 10 k ohm
INPUT: 100
SLV
LOW
BA
TT Indicator
16 steps/sec.
8steps/sec.
3mV
2
sec.
2
sec.
1.8 W
600mV
4.5 V
14
to
18 steps/sec.
7
to
9steps/sec.
5mV
1.5 to 2.5 sec.
1.5 to 2.5 sec.
1.3 W
300mV
4.5 ±0.5 V
Power Source
Channels
of
Operation
Channet, Frequency and Mode Display
Receiving 5ystem
•
Any
300
channels
in
any band combination
(30 channels x10 banks), and 10 Monitor
channels.
Liquid crystal display
Direct
Key
Entry Digital Controlled
Synthesizer, Superheterodyne.
AC
120
V,
60
Hz,
20 Wmax.
DC
13.8
V,
12 Wmax.
Built-in
3"
·(77
mm)
8ohm Dynamic Speaker
Approx,
2-7/8"
(75 mm) x10-1/4" (275
mm)
x
9"
(230 mrn) HWD
7.0
Ibs
(3.2 kg.)
•
•
Weight
Speaker
Dimensions
NOTE: "I/omina/ Specs represent the design specs: all units shou/d
be
ab/e to approximare these -some
wi//exceed
and
same
mev
drop sJight/y be/ow thess specs: Limit Specs
rearesem
the absolute worst condition
mat
still might
be
conskiered 8CCeptab/e; in
no
C~
shou/d a
unit
periorm to less than withi"
anv
Limit
Spec.
•
•
-4-
•
- - - - - - - - - - - - - - - - - - - - - - - - - - - - --- - -
------
- -- - - -


•
•
PRINCIPLES OF OPERATION
•
The
PRO-2004
is
aPhase Locked Loop (PLL) synthesized VHF/UHF, AM/FM Receiver controlled
bya
CentraIProcessing Unit (CPU) via
the
keyboard.
Receiving
mode
and
search step
are
initially
set
to correspond with
the
frequencies entered. When a fre·
quency within
FM
broedcast band
is
keyed in, receiving
mode
is
set
to
Wideband
FM
(WFM). When a
frequency in Action radio band, Police, Fire, Ambulance, Ham radio etc.
is
keyed in,
the
mode
is
set to
Narrowband
FM
(N
FM), and when a
frequency
in
Aircraft and
CB
band
is
keyed in,
it
sets
to
AM
mode.
Also
the
mode
and
step can be changed
by
!MODEl,
!STgP) Keys.
The CPU (IC·503)
controls
receiving
frequency
range, frequency determination, scanning speed, delay time,
etc. The CPU
is
able
to
do
only
the
assigned functions, and no modification
of
the
CPU
is feasible.
The following paragraphs explain
the
operation
of
the
circuit in
terms
of
the
functional bloeks:
RF
input
circuit cernprises 10 dB
attenuator
and
Bandpass filter. A signal generated
by
VCO-l
or
VCO·2
is
applied
to
Double balanced mixer (D.S.M.) via Low-pass or High-pass filter and mixed with
the
RF signaL
The
D.S.M. is
employed
to
facilitates
25
MHz
to
1300
MHz
mixing. --
The
1st
IF
(05)
is
607.505
MHz
to
611.500
MHz, and
the
signal is mixed with VCO-3 frequency
at
the
2nd
mixer
(06)
to
produce
48.5
MHz signal,
which
is
applied
to
WFM
IF
(012)
or
AM/NFM IF
(010,
018,
019).
Corresponding with
input
from
the
keyboard,
CPU
determines which
of
VCO-,
or
VCO·2,
WFM
IF,
AM/NFM,
AM
IF, Data
of
PLL
circuit
to
be functioned, and
outputs
the
necessary
data
.
. A signal
entered
to
AM/NFM IF
is
mixed
with
X'tal oscillation frequency 48.045
MHz
at
the
3rd mixer
(JC-2)
and
converted
to
.455 kHz signa!. A signaIentered
to
WFM
IF
is
mixed with X'tal oscillation frequen-
cy
37.8
MHz
at
the
3rd
mixer
(013)
and
converted
to 10.7
MHz
signal.
The
signals are further amplified
and
detected
to
AF
signa!.
•
•
AF signa
Is
of
WFM, AM,
NFM
are
CPU
controlled
and applied
to
AF
Power Amplifier (tC-7)
via
switching
circuit. Squelch signaI is comprised
of
noise
product
trom
WFM/NFM
detector
output,
and amplified by
IC·2
to
switching signal, which
centreis
AF
mute
and
CPU.
Any unstable
supp
ly voltage
te
the
CPU can produce
CPU
malfunetions, such as wrong data processing,
wrong
data
transfer,
etc~
Ta
overcome this
C512
and R501 "initialize"
the
CPU. Initialization
is
done when
RESTART switch is pushed. Figure A
shows
initiatizing waveform.
•
•
CX501 (7.37 MHz)
is
aclock which
is
used
for
CPU
control. Figure Bshows 1/4 divided waveform
at
Pin
.31
of
1C-503. •
••
CPU
output
data
display frequency,
function,
etc. on LCD.
LCD
is
back lighted with Electra Luminescence,
which works from
70
V rms,
300
Hz
A.C.
Power
supply
comprises D.C
30
V,
8 V and
two
5Vlines.
I
•
•
11:503
28
(lSOI
CSl2
s
·v--
- - - -
-~-:;-::;-;::.:::-.=-:.-
_
0.4
•
IC503
31
tt
1IO
R:lOZ
r-
--
---,
I
1.
Dr-
I
: T T
:C~1
I I
'----
---~
5V-----~
•
•
0\1--
Figure A
ov-----
i.o
.:I<"
IFigure B

•
GENERAL OPERATION OUTLINE •
•
Turn power
SW
ON.
Automatically set to
SCAN
mode and starts
scanning when the sa
is
on.
When
battery voltage drops
"BAn"
is
y-------------------- indicated and peep-tone sounds from speaker.
Pre
ss
RESTART
SW.
+
Scan Bank 1thru 10 are displayed.
1t•
Press
ül
through
lID
key.
To
hold the channel. press IDELAYI.
Scan Bank 1thru 9 are disappeared. •
To release the delay function, press
[DELA
YI
,•
Press
~
key. •
agalO
.1-.
,
To
skip certain frequencv, press ILOCK-OUÏ\.
PfeSS
Iïlthrough
mi
key and
K3
key.
Scan Bank 1 thru 9 are displayed except 10. ,
To
release the lock out function, press
.1
I
LOCK·OUTI
again.
Pre
ss
!SPEEOI sa that Scan speed
is
set
to
•
slow
speed,
•
. To
call
loeked out channels, press
,ILOCK-oUT
REVIEWI.
Press
ISP
EE
DI
so
tnat Scan speed
is
set
to
tast
IThis
function
is
avalIabie when locked
out
speed
..
••chànnels exist.l •
.1
To priority operatien
in
Scan mode press
IPR
11.
To priority operation
in
manual mode, press
IPRII
.
••
.1
To release priority operation, press IpRII again. Ta release the priority.function, press •
IPRII
again.
j
.-
Press IMANUALl.
When
IMANUALI
is
pressed
Press
IPROGRAMl
10
set
to
program mode.
again the cahnnel advance. To select one of t
thru 300 channels, push
me
number key and ~.
-
then push
IMANUAL].
•
•
.
.1
Pre
ss
lP1"RËcl1.
Step indicator
is
displayed.
·1
"2
(Step indicator
is
nor displayed when frequency
is
OOOO.OOOO.)
To
start
DI
R
ECT
Search, press
~
or
~
key. •
•
•
••
Press MANUAL). •
•
-7-
'
•

•
•
·1
•
•
•
•
Key
in
search frequencv
as
follows.
1
Press
ILIM
IT]
lor numeral key and IU MIT
Il
and key
in
lawer frequency with numeral keys.
•·t -•
Press lENTE
Rl
.,•
Press
I
L1MITI
and key in upper frequency.
.1
-.
Press lENTERI.
•t
To change mode, ptessI
MODE}
.
The mode changes
in
the order of
AM
-
NFM
-WFM.
Ta èhange step, press
ISTEP
l.
The step cnanges 5 kHz - 12.5 kHz -
sa
kHz.
•••
Ta return to the i
ni
tial sett
ing
of mode and
step. press
IRESETI.
..
Prsss
~
to search trom lower frequency.
Press
l!l to search trom
up
per frequenev.
(squelch must be on)
,•
Press I
MONITOR
Ito store the desired frequency
(10 monitor channeJs) in the searctrmcda.
•
Press
I
ENTER
Ito store me desired frequency in
the indicated ehanne
/.
Search operat
ion
starts.
•
Key
in !he desired frequency
in
each
ehannel
as
follows:
• •
..
Key
in the desired frequency with
numeral k
ey
s. •
Pre
ss
lENTE RI
to
memorize
the
fre-
••
..
quency.
If
wrong fTequency (out of the band)
is
entered, "ERROR" is displayed.
Press
[ÇLEARI and then enter the correct
frequency.
-'-
Pr
es
s
IPROGRAMI
..
Advance
to
nsxr channel.
Key
in the frequency and press (ENTER
I.
repeat it to memorize frequencies one by
one.
t
Press IPR
II
sa that priority ehannel
is
appeared.•
+
Ta revert to the previous channel, press
[PRIj
aga
in
.
t
Press
numeral keys
(1
thru 300) and then
press
lPA
II.
Pr
iority channel is set to entered new
channe
l.
t
Ta
call
monitor ehannels, press
IM
ON
IT
OR
I.
~
Pre
ss
IMO
NI
TOR I
sa
that
next monitor
ehannel is appeared.
Ta
C<l1I
the monitor channels directlv,
press numeral keys.
t
Ta reve
rt
to
the previous ehanne
l,
press
IPROGRAMI.
•
-3
-

••
•
ALIGNMENT
•
ALIGNMENT
AND TEST POINTS
(L1NEAR
PCB)
TP4
TP3
TP5
J
LI
O.----SHIELD
CASE
•
~
(0)
-
t.55
®
~SHIELD
CASE
-
r---:--TPI
•
•
•
T6
T4
~~
113
D
T7
5
T3
CF-2
~
@
~
~~I@]c=J
IPC-I IL59
HIELD
ASE
•
•
(PLL
PCB)
•
•
SH\ELO
CASE
TP2
•
SHIELD
CASE
•
l311
L309~SHIELO
A
~
CASE
@_.
~-TP
301
"
•
'"
I
U
Q.
PLL-2
TP302
SHIELD
CASE
-9
-
PLL-I
•

•
•
ALIGNMENT
PREPARATION
Test equipment required
1.
Oscilloscope
2
ACSSVM
3.
De SSVM
4. B-ohrn
dummy
load
5. AM. FM. Signal Generator (25 to
t300
MHz)
6.
Distortion
Meter
•
•
NOTE1:
Use
non-metsttic runing tools:
The test eautoment
and
Receiver should be warmed
up
at
least
30
minutes
before
proceeding
w;th
alignment.
Input
signal
from
the Generator
should
be
kept
as
tow
as
possible
and
still
obtain
usabIe
output.
•
•
•
•
•- i
J)
-


•
Step Control Setting
Channel Programming Test Instrument
Connection Adjust Remarks
3OFF/vOLUME control:
ON
SQUELCH control:
Fully counterclockwise
Channel Programming:
CH4 (250
MHz
-NFM)
Connect Signal
Generator
to
TP1,
DC
••
SSVM
to TP2 and TP5
to ground.
(Figure
6)
•
Tl
T9
T10
Tll
T12
Alignment of
NFM/AM
2nd
IF
1)
Set the Signal Generator frequency
to 48.5
MHz,
0.3 Voutput
(NO
MOD).
2) Adjust
Tl,
T9, T10,
Tll
to maxi-
mum voltage
at
TP2. .
3) Adjust T12
to
minimum voltage at
TP2, approx.
O.2V
on the
DC
SSVM.
NOTE: Perform these adjustment
by using the
DC
SSVM
which
is
able
.to measure
to
three decimal places
because of the output voltage óf
TP2
is
low. -.
Figure 6
•
•
TP1
TP2
•
SJGNAL
UNIT
DCSSVM
GENERATOR
UNDER
TEST
",
•
cTP5
",
•
•
•
Control Setting Test Instrument Adjust RemarksStep •
Channel Programming Connection •
4OFF/vOLUME control: Connect Signal T13 Alignment of 455 kHz
NFM
ON
Generator
to
TPl and Discriminator coil
SQUELCH control:
DC
SSVM
to
TP4. Set the Signal Generator frequencv'
to
Fully
CCW
(Figure 7) 48.5
MHz,
100
p.V
output
(NO
MOD)
Channel Programming: and adjust T13 for 3.8V
(±0.1)
on.the
CH4 (250
MHz
-
NFM)
•
DC
SSVM
.•
-
Connect Signal •T6 Alignment of 10.7
MHz
WFM
.
5 OFF/VOLUME control: "
Generator
to
TPl and •Discriminator coil
ON
SQUELCH control:
DC
SSVM
to
TP3. Set the Signal Generator frequency
to
Fully
CCW
(Figure 7) 48.5
MHz,
100
p.V
output
(NO
MOD)
Channel Programming: and adjust T6 for 3.8V (±0.1) on the
•
CH5
(98
MHz
-
WFM)
DC
SSVM
.
•Figure 7
TP1
TP30rTP4
SIGNAL
UNIT
DCSSVM
•
UNDER
TEST
GENERATOR
.r
."
",
-12
-•
•

Control Setting Test Instrument Adjust RemarksStep .
Chanel Programming Connection .
6OFF/vOLUME control: Connect SignaIT7 Alignment of 455 kHz IF coil
ON
Generator
to
TPl and
1)
Set the Signal Generator frequency
SQUELCH control: Oscilloscope,
AC
SSVM,
to 48.5
MHz,
Fully
CCW
Distortion Meter,
8n
AM:
60%
MOD.
at
1 kHz and
Channel Programming:Load
to
EXT SPKR 100
p.V
output
CH6 (120
MHz
-AM) JACK. 2) Adjust T7
to
maximum sensitivity.
(Figure 8) .
7Same
as
step 6Same
as
step 6 T8 Alignment of 455 kHz
AM
DET.
.coil •
1)
Set the Signal Generator frequency
to 48.5
MHz,
AM:
60%
MOD.
at
1 kHz and
100
p.V
output.
--
2)
Adjust T8
to
minimum T.H.D.
•point.
-
Figure 8,
,
sa
'La AD ,•
•
EXT
SPKR
TPl
JACK
SIGNAL
UNIT
AC
GENERATOR
UNDER
TEST SSVM
/11
OSCIl.LOSCOPE
"
,
DISTORTION
METER
_ 1
'l
_
.
~
•

Step Control Setting Test Instrument Adjust Remarks
.Channel Programming Connection
8OFF/VOLUME control: Connect Signal
T2
Alignment of 48.5
MHz
and
ON
"Generator
to
ANT,
T3 10.7
MHz
WFM
IF
coils
SQUELCH control: connector and
T4
1)
Set the Signal Generator frequency
Fully
CCW
Oscilloscope,
AC
SSVM,
T5
to 98
MHz
•
Channel Programming:
sa
LOAD
to
EXT
FM:
22.5 kHz DEV. at 1kHz
MOD
,
CH5 (98
MHz
-
WFM)
SPKR JACK. output approx. 2
p.V.
(Figure 9)
2)
Adjust T2, T3 to maximum •
sensitivity.
NOTE
: Alignment of T4, T5 are
not
•necessary.
.
When
those core are turned, adjust
cores
so
that those tops of cores
become
as
high
as
those coil case.
SIGNAL
GENERATOR
ANT
connector
o
11
'
Figure 9
UNIT
UNDER
TEST
•
EXT
SPKR
•
",
an
LDAD
ACSSVM
•
OSCILLOSCOPE
Step •Control Setting Test Instrument Adjust Remarks
Channel Programming Connection ••
9OFF/VOLUME control:
L1
Alignment of IF TRAP coils
ON
L55
•
1)
Set the SignaIGenera
tor
frequency
SQUELCH control: Same
as
step 8to 609.505
MHz
Fully
CCW
FM:
3 kHz
DEV.
1 kHz
MOD.
Channel Programming: Output,approx. 3
mV
CH7 (300.495
MHz
-
2)
Adjust L1 and
L55
to minimum
NFM) sensitivity.
•
10 OFF/vOLUME control:
L60
Alignment of 512
MHz
TRAP coil
.ON
1)
Set the
Signa
IGenerator frequency
SQUELCH control: Same
as
step 8to 337.495
MHz
•Fully
CCW
FM:
3
kHz
DEV
. 1 kHz
MOD
,
Channel Programming: Output, approx. 3
mV
CH8 (240.495
MHz
'-
•
2)
Adjust
L60
to
minimum
NFM)
.•sensitivity.
•• ••-
14-

NOTE: Alignment
of
L59 (GR-H763, B.P.F. coil)
Do
not
adjust this coil because
of
L59
is
al
ready adjusted
at
Factory.
When
turn
the
colt
care,
perform
the
alignment as below (step 11).
B.
P.
F. characteristic
is
Figure 10.
Step
11
Control Setting
Channel Programming
OFF/VOLUME
control:
. ON
SQUELCH control:
Fully
CCW
Channel Programming:
CH9 (800.495 MHz)
CH10 (800.500 MHz)
•
Test
Instrument
Connection
Same
as
step 8
(Figure 9)
Figure
10
Adjust
L59
•
Remarks
Alignment 1st
IF
(611.5
to
607.505 MHz) S.P.F. coil
1) Select channel 7(a00.495 MHz) and
set the Signal Generator frequency
to
a00.495 MHz,
FM:3
kHz
DEV.
at
1
kHz
and
1
pV
output.
2)
Adjust
L59
to
maximum
sensitivity•-.
3) Select channel 8 (800.500 MHz) and
set the Signal Generator frequency
to
aOO.500 MHz,
FM:
3
kHz
DEV.
at
1
kHz
and
1
pV
output.
4)
Adjust
L59
to
maximum
• • •
sensrnvrtv.
NOTE:
Align the balance
of
CH9,
CH10
sensitivity
to
become
same
.
•
•
•
tst IF Center Frequency 1609.505 MHz)
4MHz
at CH9 (800.495 MHz)
_~
..
at
CH10
(800.500 MHz)
lst
IF
Frequency
~--+--_
lst
IF
Frequency
611.5
MHz
607.505 MHz
_
,I:;
_
.
~
•

•
ZEROMATIC FUN-CTION TEST PROCEDURE
-
,
-.
•ics
-I~.,.J-:::.6
5 _
S
-"'"
ICS
-
6
•
..-
•
ICS
••
•
•'.
••
Discriminator Curve
(NFM)
(WFM)
(Zeromatic functions when OUTPUT
is
in
"H"
leveL)
0<e1<e3
e3<e1
<e2
e2<e1
<VCC
•
.OUTPUT
(JC3
Pin
No. 4) LHL
(NFM
MOD.)
To adjust
e1
voltage, receive signal
in
Manual
mode,
and
set T13 to obtain 3.8 V
(±O.1
V)
at
TP4.
It
is
convenient
to
use the National Weather Service
signal
for the adjustment.
(WFM MOD.)
To adjust
e1
voltage, receive
signa
I
in
Manual
mode and set
T6
to obtain 3.8 V
(±O.1
V)
at TP3.
It
is
convenient to use the
FM.
TV. sound
signal
for the adjustment.
-
lS
-

-
KEYS ACCESS PULSE
OUTPUT
(IC-S03)
•
I
I
------------_1
I
I
--------------------r
I
•
I
I
I
10ms
I •
I
poo
IJ"
I
II-
I
"'""---
,
ll--
t
I
~------
2705'11s----
__
,
I.
I
•
201'lls
.~
.-
I.
235.51Is
.1
P06
P07
-
NOTE:
Use
asignal
at
P01
of
IC-S03 as trigger, and then observe
the
keys access.pulse when IPROGRAM I
key
is
pressed. .
•
DATA
WAVEFORM
(IC-S03)
"
I
I
I
I
-
•
•
I I
II
II
I
I
II
-1.I---OISPLAY
OATA-----------z
__
,
'PLL
DATA
I
I
I
~
OISPLAY
DATA
I
I
I
I
Jr-'--
16.7ms
-_a
I I I
III I
I I I I
I I
1--------....----1---------
III . I
I I I. I
I I I I
_
___
-+-
--.1'-------------'---------
l..
I
1-
1
- I -
,.
,
-------,.-
I
I
I
I
I •
I
----'..--------------
BUSY
(Pin
13)
LCD
CS
(Pin
15)
-
LCD
C/O
(Pin
14)
•
CLOCK
(Pin
19)
DATA
(Pin 20)
LT
1-
(Pin
17)
LT
2
(Pin
16)
•
•
••.
.,

'PLL
DATA
WAVEFORM ,
CLOCK
(Pin
191
DATA
(Pin
201
I
1
I
Inl
•
II
>k
I
I
I(
424.u5
434.us
)l
LT
1II
(Pin
17)
lI
I
II,
IE
286.us
434.us
)I
e,
LT 2 I
l
(Pin
161
NOTE: Data in Program mode when 150.000 MHz entered.
•
••
-18
-

•RECEPTION CHECK
•
Power ON
./
•
Does
NO
Displav Work
.:>
Properly?
YES
•
Does
sa
<functio" and Scan
::>
NO
When sais
ON?
YES
•
Does
NO
Kev-in
werk
.:>
.
properly? •
•
YES
Is
Power Supply circuit
OK?
.......
Doesthe
•
Unit
produce
NOISE
NO
turned
clockw
ise? Is voltage Regulator
OK?
ISO:
counter-
c1ockwise)
YES Is ICS03
clock
osclilatio" waveform
•
or
reset OK?
Is reception
.:>
NO
OK when correct .
<treueencies are
entered?
15
epu
control circuit
••OK? •
••
YES ,
Is Kevboard
and/or
Is
oe
-
oC
converter Is ICS03 OK?
-:
Does OK? associated circuit OK?
NO
Memorv function
:>
work
OK?
.........
YES .
Is
Back-up
battery
OK? Is voltage
Regulator
Is ICS03,
and
reset Is IC701 OK? •
OK? properlv?
END
Is CPU
control
circuit
Is
AF
filter select Is IC1, IC2
andlor
(which
consists
of
D49, •
IICS01,
OSOl-S07)
moeial circuit
OK?
030,
31, 34) OK? OK? -
+.
•
Is
memory
power
supply
Is MODE lAM,
NFM,
•
is
IF
Amp
or
Noise
Is
MUle circuit
tlC4
.
circuit
(which
consist
WFMI seteer OK?
023,24
,
2S1
OK?
Amp
circu
it
IIC1,
IC21
of
1C9) OK? IICS02,
027,
28,
291 OK?
•
Is VCO (VCOt , VC021 Is
Audio
Amp
(IC7)
seteet
OK?
Is ICS03 OK?
IICS02,
031S,
3161
or
Audio
Pre
Amp
(leG)
OK?
Is VCO filter
I,
2
select OK?
•IICS02.
0301,3021
•
Is
PLL
circuit (which .
consists
of
IC301 ,
302
,•
3031 OK?
•.
•
•
Is
VCO circuit OK?
•
•
•
.-•
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