Denon AVR-3801 - Page 19

19
AVR-3801
LC72131M (AC: IC507)
LA1265 (S)
(AC: IC502)
1
VOL
REG
OSC
SYM M ETRICAL
REOCTANCE
CIRCUIT
PHASE
COMPARATOR
VCO STOP
PILO T DET
FF
FF
FF
38kH z
FF
38kH z 90°
FF
19kH z 90°
MUTING
FM AM C HANG E
Ro
Rc
Rc
Rb
DECODER
M UTIN G C ONTRO L
F M A M C H A N G E O V E R
Vcc ON
MUTING
MUTING
OUTPUT
STEREO
SW ITCH
TRIGGER
LAM P
DRIVER
Rb
2
3
4
5
678
9
10
11
22
21
20
19 18
17
16
15 14
13
12
LA3401 (AC: 503)
1
20
2
19
3
18
4
17
5
16
6
15
7
14
813 9
12
10
11
XIN
CE
DI
CL
DO
BO1 BO2 BO3 BO4
IO 1
AOUT AIN PD V
DD
FM IN AM IN IO 2 IF IN Vss XOUT
1
23
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
22
1
11
FM IF
Level
Det.
Level
Det.
RF Amp Mix.
AM IF
Det.
LED
Driver
Osc.
Buffer
Reg.
AGC S meter
SD Adj
GND
Q Det
S Curve
Vcc
Post
Amp
BU2090F (EX: IC103)
1Vss
2DATA
3CLOCK
4LCK
5Q0
6Q1
7Q2
8Q3
9Q4
18
17
16
15
14
13
12
11
10
V
DD
OE
Q11
Q10
Q9
Q8
Q7
Q6
Q5
CONTROL CIRCUIT
12-bit SHIFT RESISTER
12-bit STRAGE RESISTER
OUTPUT BUFFER (OPEN DRAIN)