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RX-508VBK
RX-508VBK
RX-SOSVIN
RX-509VTN
@ 1C7218 (i102) : PLL Synthesizer
HE LA1266A (!C104): FM AM
IF AMP & detector
1. The main function descriptions
. egies
feat
f
by th
ol data
4
1c401
(1) Amplify and detect of FM intermodulation frequencies.
1) It makes
the local oscillation
frequency
by
the control
data from
:
;
A
:
ee
(2) Decode the control signal and transmit the signal for receiving conditions.
(2) It has local oscillator and mixer for AM, and amplify the AM-IF signal.
(3) For the best tuning, count the internal-frequency and transmit the data to 1C401.
2. Top View
3. Biock Diagram
1
r
AM
AM
AM
FM
FM
2. Terminal Layout
3. Block Diagram
Mix
iF
of
«STRQ
e
an»
Bypsss
euET
Vee
we
FM-in
AM-OSC out
bal fa} fe
sees
BYPASS
AM-OSC
1
Reference
Phase Detector
BYPASS
V.ret
'
XIN
X Out
xin 1
Driver
Charge Pump
2 1
por
GNO
enue
FM out
ce
Vsg 0 XOuT 24h
:
Foz
eas
ee
!
[a]em arc
CE
AEE
a
4
s
'
2
ee
-
ae
Yee
AMAF
i
['S]am out
x
Pot
een
Ao t e
Swallow Counter
SIG
AM Adj.
1
ee
sis
1/16, 1/17 Abits
:
FM-AFC
FM Adj.
:
;
:
FM-IF
AM out
i
sre
rhein
AMAF
NAR SM
i
TUNED
AM-
tor
FM-OUT
sTRQ
'
{8 ]tuned IND.
STOP IN
in
amin 16
i
Band width
1
No a
nal
ooo
SOWER
te
aM
AM-OSC
AM-OSCT
NAR
AGC
AM
FM
GND
asc
REQ
an
in
out
SM
Adj. Adj.
——
cE
2
VoD
MONO
FMIF
oO
3
ies
7M
rod
os '
4. Pin Function Description
ni
fk
Wrane
aeSRE Tt
nie
Pin No. Symbol
Functions and Operations
oun
1)
20039
4)
«65 «6 INO Ot
} 1
[| FMin | 1 |input terminal for FM signal.
BYPASS | ~ | Bypass of FM IF Amp.
.
-
ee
Device ground terminal.
4. Pin Functi
ription
[4 | GND | = [Device ground terminal,
Pin Function Descrptic
-
| 5.6 | FMDET | — |FM detect transformer,
Pin No.| symbol |vo!
Functions and Operations
| 7
|
Vee | — [Power supply terminal.
|_1.24
{Xin X out | VO | Crystal oscillator (7.2MHz).
——
;
;
| 8
| SiG | O [Whethesetistunning ,this terminal become "L".
[ 2
|
CE {| t |Fix the chip enable to "H" when inputting (Di) and outputting (DO) the serial data.
:
3
[DI] 1 [Receive the contro! data from the controller (IC401)
| 9 | FMAFC | O [Output terminal of voltage for FM-AFC.
Ya]
1 | this clock is used to synchronize data when transmitting the data of Di and DO.
FMiF _| © [When the signal of IF REQ of 1C102(LC7218) applied to pin17, the signal of FM IF does output.
[5
| DO | © | Transmit the data from LC7216 to the controller which is synchronized with CL.
| 11 | AMIF | © [When the signal of IF REQ of IC102(LC7218) applied to pin17, the signal of AM IF does output.
po 6 ft svc
— [Not used
| 12 [ Fmout | 0 [FM detection output.
TUNED
a
Receive
the tuned signal from 1C104 (LA1266A).
| 13 |
STRQ
Lt] The IF-signals come out from pin10 (FM-IF) or pin11 (AM-IF) while this terminal going to High".
lon connecti
re
oe
=
| 15 [| AMout | 0 [AM detection output.
[ 10 f QsC__|} — JON mode with
"H" and OFF mode with
"L*. (Non connection)
:
[11
| MONO | 0 [ft is "H" on FM-monaural, "Lon FM-Stereo.
°
| 16 | FMAdj. | — [FM stop level (or mute level) adjust.
[i2. [FM
[0
[ft is "L" on FM mode.
AM Adj. | — | AM stop level (or mute level) adjust.
[73 [wo
Tris "17 on MW mode:
[18 | Amar | 1 [AM iF Signal input.
p14
fiw
fo
tit is "tT on LW mode.
| 19 [| AM-AGC | 1 [AGC voltage input terminal for AM.
[15
| AM-iF | { | Universal counter input for AM-IF from IC104 (LA1266A).
ah MI
Sache caininal GCANLL
[16 | FM-if [1 [Universal counter input for FM-IF from 1C104(LA1266A).
|_20_|
A M - M i x
| © [Output terminal for AM mixer,
[17
| if REQ | O [Outputthe "IF-signal request" to C104 when the pin-7 (tuned in) go to "H*.
| 21 | amin" | 1 [input terminal for AM RF Signal.
[ 18 | AMin_| t [Input the local oscillator signal of AM.
V.REF
| — | 8and-width control of FM signal meter.
[19
| FMin | | Jinput the local oscillator signal of FM.
| 23 | AM-OSC | — [AM Local oscillation circuit.
BEES
BT
power supply termine!
;
7
aes
AN-OSC
AM Local Oscillation Signa! output
PLL charge pump output: When the local oscillator signal frequency is higher than
g
Put;
21
the reference frequency high level signals will output.
When it is lower than the reference frequency, low level signals will output. When
it is same as reference frequency signals, it wil! be floating.
P22)
pp?
= [Nonconnection
[| 23 |
Vss
{| — [Power supply.
1-32 (No.20376)
(No.20376) 1-33
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