Denon DRA-395 Service Manual page 9

LC72131M (IC401)
XOUT
XI N 1 20
CE
2 19 V ss
DI 3 18 AOUT
CL 4 17 AI N
DO 16 PD
5
BO1
V
6 15
DD
BO2 F MI N
7 14
BO3 AMI N
8 13
BO4 I O2
9 12
I O1 I F I N
10 11
TC9184AP (IC602)
Vss 1
16 VDD
2
BASS + 15 BASS
-
BASS 3 14 BASS
CON 4
13 COM
-
TREBLE 5 12 TREBLE
TREBLE 11 TREBLE
+ 6
GND 10 STB
7
CK 8 9 DATA
BA7625 (IC501)
Monitor OUT 1
16 IN1
2
GND 15 CTL A
6dB
IN5 3 14 V OUT1
LOGIC
GND 4
13 Vcc
IN4 5 12 IN2
6dB
CTL E 11 CTL B
6
IN3 LOGIC 10 V OUT2
7
CTL D 8 9 CTL C
LA1266 (IC402)
1 24
2 23
3 22
4 21
5 20
6 19
AM - I N
7 18
8 17
9 16
10 15
11 14
12 13
LA3401 (IC403)
21
22
VOL
OSC
REG
SYMMETRICAL
REOCTANCE
CIRCUIT
FF
MUTING
FM AM CHANGE
1 2
3
1
BASS+ 2
+
-
-
BASS- 3
+
COM 4
TREBLE-
5
TREBLE+ 6
A B E MONITOR OUT
L L IN 1
*
H L IN 2
*
L H IN 3
*
H H L IN 4
H H H IN 5
Note 1: * mark means that feasible for either H or L.
Note 2: Each input terminal is provided with sink chip clamp (BA7625).
Each input terminal takes 20kohm at the end (BA7626).
AM-IF FM-IF
20 18 11 13 10
1
IF IF
FM - IF
BUFFER BUFFER
RF MIX AM-IF
21
OSC
REG OSC
BUFFER
GND
22 23 24 4
20 18
19 17 16 15
PHASE
PILOT DET
COMPARATOR
VCO STOP
FF
FF FF
FF
38kHz
38kHz 90° 19kHz 90°
MUTING CONTROL
DECODER
FM AM CHANGE OVER
Ro
Rb
Rb
Rc
Vcc ON
MUTING
Rc
4
5 6 7 8 9
9
16 7 8 10
Level shift
Code
detect
circuit
C D E V OUT 1
¾
L L
*
H L IN 2
*
L H IN 3
*
H H L IN 4
H H H IN 5
DRA-395
FM-IN
2 3 5 6 7
V cc
POST
Q.D. 12
AMP
9
DET 15
LED
NARROW
AGC
S-METER 8
S-METER DRIVER
14 19 17 16
13
14 12
LAMP
DRIVER
TRIGGER
STEREO
SWITCH
MUTING
OUTPUT
10 11
BASS+
15
14 BASS-
COM
13
12 TREBLE-
11 TREBLE+
C D E V OUT 2
L L IN 1
*
¾
H L
*
L H IN 3
*
H H L IN 4
H H H IN 5
9