Table of Contents
Advertisement
RX-504VBK/RX-504VLBK
RX-505VTN/RX-SO5VLTN
ME 1LA1266A (1C104) : FM AM IF AMP & detector
1.
The main function descriptions
(1) Amplify and detect of FM intermodulation frequencies.
(2) It has local oscillator and mixer for AM, and amplify the AM-IF signal.
2. Top View
3. Block Diagram
AM AM
AM
—M
FM
Mix
IF
IF
STRQ
IF
-in
Bypass
FM-DET
Vec
FM-in
[1
AM-OSC out
- bol rs]
aise
BYPASS | 2
AM-OSC
!
BYPASS | 3
V.ref
}
sic {8
AM Adj.
1
FM-AFC | 9
FM Adj.
FM-IF | 10
AM out
!
AM-IF | 11
NAR
SM
|
EM-ouT | 12
STRQ
'
[8 |Tuned IND.
!
NO Sig.->H
L
Sig.oL
AM-OSC
AM-OSC
NAR
-in
in
out
SM
Adj.
Adj.
4. Pin Function Description
Pin No.| symbol |1/0}
Functions and Operations
[1
| FMin | 1 {input terminal for FM signal.
| 2,3. | BYPASS
| -- [Bypass of FM IF Amp.
ee
| FMDET | ~ |
Mewes
| sig | 0 |
Pamare_[O_
Teme [0]
Tame [|
Pawout [0]
The IF-signals come out from pin10 (FM-IF) or pint1 (AM-IF) while this terminal going to "High".
Control the Band-width of signal meter.
AM detection output.
FM stop level (or mute level) adjust.
AM stop level (or mute level) adjust.
AM IF Signal input.
a
=
2 |
Sia
| AM
Adj. | ~ |
| AMF
| AM-AGC | | | AGC voltage Input terminal for AM.
| 0 |
|
eS
fi
Output terminal for AM mixer.
AM-OSC
AM-OSC
OUT
input terminal for AM RF Signal.
Band-width control of FM signal meter.
AM Local oscillation circuit.
AM Local Oscillation Signal output.
36
a
ar
pen
(No.20220) 1-27
Advertisement
Table of Contents
