Rvitc9137P - Panasonic RM-1100 Service Manual

Description
2.8JLsec
FM programmable counter input terminal.
The FM local osclll~al which is divided
into 1/30 or 1/32 by the prescaler (IC6
RVITD6104P) is inputted to this terminal.
[Example] FM 100 MHz
1.6 V
1 V
FM IN
37
Pin No.1 Symbol Description
Muting output terminal.
The muting output is delivered from the MUTE
terminal at the time of key operation and other
cases.
STO
I
Preset memory storage terminal.
Pressing the memory switch (56) brings pin 13
to "L" to ready the circuitry for storage.
Mute
A·STOP
I
Auto·search stop input terminal.
When a broadcast is detected during auto·
search operation, "H" level signal is applied
from 03 (250601, SWITCHING) to the A·STOP
terminal to stop the auto·search.
36
12
13
38
I
PSC
I
This is the terminal to deliver the frequency
14-17
I
M1-M41 Memory addressing input terminals.
II dividing ratio change over output signal to the
When the desired program switch (57, 58, 59 or pre·scaler (IC6 RVITD6104P).
510)
IS
pressed in the memory set ready
condition, the corresponding terminal (M1, M2,
ffiJUlI6V
M3 or M4) goes "L". At this time the reception
frequency data is -stored. The stored data can
be read by simply pressing the corresponding
OV
program switch (57, 58, 59 or 510).
~JLsec-1
[Example] FM 100 MHz
II
I
I
20-22
I
CK·1
I
Reception frequency data and timing signal
CK·2 output terminals.
39
AM IN AM programmable counter input terminal.
Data
A cycle of data and signal is serially delivered
The AM local oscillation signal is directly applied
only when the reception frequency is altered,
from pin 8 of IC301 (PVIUPC1215VE) to the AM
Le., when the UP/DOWN key is pressed, the
IN terminal in the AM mode.
memory is read, or the band is changed.
I ___
o.~-
The timing signals for data signal reading are
delivered from the CK·1 (pin 20) and CK·2 (pin
4V
21) terminals.
The reception frequency data is delivered from
the DATA terminal (pill 22).
OV
JlII.Il.UJLJLIl
CK·1
J"lJUl.IlJlIlJlJl.lUlJl.JUlJll
CK·1
II
I I
7JLsec
~CK.2~CK.2
[Example] AM 1000 kHz
Droa Droa
[Example] AM 1000 kHz [Example] FM 100 MHz ..
I
INH 40
I
Inhibit input terminal.
When the power is turned on, the voltage rising
time at the INH terminal (pin 40) is delayed for a
Phase comparator output terminal.
II
I
I
certain time [the time constant of R90 (100 kO)
34 I
00·1
I
and C94 (1JLF)]. The band mode selection data
When the phase of the frequency·divided output
is read during this rising time.
of the programmable counter lags behind the
reference frequency, the output at the phase
comparator output terminal goes "L" for the
period corresponding to the phase difference.
When the counter output leads, the comparator
"
42
I
VDD
I
A voltage of 5 V±0.5 V supply' to this terminal
output goes "H" for the period corresponding to
during device operation.
the phase difference.
Pin No. I Symbol
RM-1100 RM-1100
Fig. 26
Voo
psc
AM IN FM IN
,
~
,
BI
B2
EI
E2
XT
XT
STO
2) Block Diagram
Voo
TEST
INH
AM
IN
PSC
FM IN
Mute
,n---Pee
00-1
00-2
HI
H2
H3
H4
h....--.-
H5
Li
L2
L3
b----- L4
0/5
~tl----- Dote
Fig. 25
RVITC9137P (IC7): EACH TERMINAL FUNCTION &
WAVEFORM
GND--d
XT
XT
81
82
EI
E2
OSC
AIM
UP
DOWN
A-STOP
STO
Mi
M2
M3
M4 -
M5
M6
CK-I
CK-2
3) Explanation of each terminal
1) Terminal view
Pin No. Symbol
Description Pin No. Symbol
Description
1 GND Ground terminal.
8
OSC External CR connection terminal.
Externally connected C123 (10 V, 2.2 JLF) and
XT,XT
R133 (27 kO) determine the auto·search scan·
2,3
Used to connect a quartz oscillator (7.2 MHz). ning speed, automatic reset of the preset
memory storage state, and the shifting time of
manual tuning to fast scanning.
4,5
81, 82 Input terminals for FM/AM band switching and
IF fine tuning selection.
AIM Auto/manual switching input terminal.
Applying the voltages shown below effects band
9
switching and IF selection.
Selects manual or auto·search mode in the
up/down tuning mode.
"L" level ......manual mode
81 (Pin 4) B2 (Pin 5) "H" level ...... auto·search mode
"l"
'ILl!
AM (450 kHz)
Sustained pressing of the UP/DOWN tuning key
for a certain time switches from manual mode to
"HII
"H" FM (10.7 MHz)
auto·search mode, and moves the AIM terminal
from "L" to "H".
"H" Level: 5 V "L" Level: 0 V
6,7 E1, E2
Band-mode switching input terminals.
10, 11
UP, Tuning key input terminals.
Applying the voltages shown below switches the
DOWN
When the voltages shown below are applied to
band mode.
the UP and DOWN terminals, the reception
frequency is raised or lowered.
E1 (Pin 6)
I
E2 (Pin 7)
I
UP (Pin 10) DOWN (Pin 11)
"H" "H" The reception frequency is locked.
ilL"
I
"HI!
For U.S.A. BAND
"H" "L" The reception frequency lowers.
"L" "H" The reception frequency rises.
"H" Level: 5 V
"L" Level: 0 V
"H" level: 5 V, "L" level: 0 V
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