D Amp Assy - Pioneer S-W1EX Service Manual

1

3.3 D AMP ASSY

A
B
B6B-PH-K-S
CN301
C
+12V 1
SIGNAL
2
GNDA
3
GNDR
4
5
AC DET
6
COMP
D
E
F
E
18
1
2
E
OSC
R402
R401
5.6k
VOLTAGE CENTER
NJM4558MD
IC301
4
3
1
8
2
INPUT
0
BUFFER
NJM4558MD
R301 C301
1k STBY
C303
4 IC301
STBY
5
7
8
6
Q371
2SC4081(RS)
KN399
VNF1084
CHASSIS
Q551 C
B
STBY E
The mark found on some component parts should be replaced
with same parts (safety regulation authorized) of identical designation.
2
3
D AMP ASSY (AWU8170)
IC403
NJM78M05DL1A
IN OUT
1 3
2
22k COMPARATOR
IC401 NJM319M
4
11
R405 IC401
12 9 NJM319M
5 3 8.2k
6
10
8
R404
27k
V
9
VC
3
VC
185KHz
VC:6.6V
R382
0
STBY STBY C304
10/50
R304 R305
SYS.MUTE
LIMITTER
Q553
R553
Q372
STBY
STBY
STBY
COMPRESSOR DETECTOR
IC302
NJM4558MD
2
C372
8
10/50 R373
1
D372 3
10k
4
S-W1EX
3
4
PWM
No SIGNAL
SIGNAL
5V
D401
EP05FA20
TC74HC14AF
TC74HC14AF
14
14
R408
11 10 13
7
7
82
IC402 IC402
D402
EP05FA20
IC402
IC402
14
14 14
R409
7
9
1 2 3 4 5 6
7
7
7
82
IC402
TC74HC14AF
TC74HC14AF
TC74HC14AF
TC74HC14AF
DELAY GENERATOR
BUFFER BUFFER
TOTAL GAIN MUCHING FEED BACK ADDER
IC303
NJM4558MD
NJM4558MD
3
C307
4 IC302
10/50 3.3k
5
2
7
CEHAT R309
8
6
R308
6.8k
C305
STBY
D302
STBY
Reference Level:29Vrms/OUTPUT SIGNAL(100HzSIN WAVE)
4
R411
12
R410 1k
1k
14
8
7
IC402
4
1
8
C311
R310
0
470p
R311
4.7M
4.7k R312
D301 R313
STBY
STBY
SOFT CLIP