Denon DRA-395, Service Manual

Page: 9 / 64

9
DRA-395
LA1266 (IC402)
10
4
1 3
8
19
15
17
18
14
21
22
GND
V cc
5
11
IF
BUFFER
IF
BUFFER
2
FM - IF
6
Q.D.
7
REG
23
OSC
OSC
BUFFER
24
NARROW
S-METER
S-METER
16
LED
DRIVER
RF MIX
12
20
AM-IF DET
AGC
POST
AMP
9
13
AM-IF FM-IF FM-IN
AM - I N
TC9184AP (IC602)
2
3
4
5
6
1 16 7 8
9
10
15
14
13
BASS+
BASS
-
COM
TREBLE
-
V
SS
V
DD
GND CK DATA STB
BASS+
BASS
-
COM
TREBLE
-
Ladder resister
Analog swi
tch
13 bit l
a
tch circuit
Level shift
20 bit Shi
ft r
egister
ci
rcui
t
Analog swi
tch
Ladder resister
Ladder resister
Analog swi
tch
13 bit l
a
tch circuit
Code
detect
circuit
Analog swi
tch
Ladder resister
20 19 18 17 16 15 14 13 12
9 8 7 5 6 1
21
LA3401 (IC403)
22
VOL
REG
OSC
SYMMETRICAL
REOCTANCE
CIRCUIT
PHASE
COMPARATOR
VCO STOP
PILOT DET
FF
FF
FF
38kHz
FF
38kHz 90°
FF
19kHz 90°
MUTING
FM AM CHANGE
Ro
Rc
Rc Rb
2 3 4
DECODER
MUTING CONTROL
FM AM CHANGE OVER
Vcc ON
MUTING
MUTING
OUTPUT
STEREO
SWITCH
TRIGGER
LAMP
DRIVER
Rb
10 11
LC72131M (IC401)
1 20
2 19
3 18
4 17
5
16
6 15
7
14
8 13
9
12
10 11
XI N
CE
DI
CL
DO
BO1
BO2
BO3
BO4
I O1
AOUT
AI N
PD
V
DD
F MI N
AMI N
I O2
I F I N
V ss
XOUT
BA7625 (IC501)
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
Monitor OUT
GND
IN5
GND
IN4
CTL E
IN3
CTL D
IN1
CTL A
V OUT1
Vcc
IN2
CTL B
V OUT2
CTL C
6dB
6dB
LOGIC
LOGIC
A B E MONITOR OUT C D E V OUT 1 C D E V OUT 2
L L
*
IN 1
L L
*
¾
L L
*
IN 1
H L
*
IN 2 H L
*
IN 2
H L
*
¾
L H
*
IN 3
L H
*
IN 3 L H
*
IN 3
H H L IN 4 H H L IN 4
H H L IN 4
H H H IN 5 H H H IN 5 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).
11
12
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
Vss
BASS +
BASS
-
CON
TREBLE
-
TREBLE +
GND
CK
VDD
BASS +
BASS
-
COM
TREBLE
-
TREBLE +
STB
DATA
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13