Denon PMA-2000 IV - Amplifier Service Manual page 8

LB1639 (IC902)
TOP VIEW
V 1 V
8
IN1 OUT1
GND 2 V
7
CC
V 3
N.C.
CONT 6
V 4 5
V
IN2 OUT2
V
 OTHERS
GP1U27X (Remote Control Sensor)
(IC103)
TOP VIEW
 TRANSISTORS
2SA933S (S)
2SA988 (E/F)
2SA1145 (O/Y)
2SA1546 (M/L)
2SB1328 (P)
2SC1740S (S)
2SC1841 (E/F)
2SC2705 (Y)
FRONT
2SC3421 (O/Y)
VIEW
2SC4001 (M/L)
2SD2004 (P)
C
E B
V V
OUT1 OUT2
8 5
V
REF
1
IN1
Head Limiter
BPF
Amp Amp
2SA1837 (Y) DTA114ES
2SC4793 (Y) DTC114ES
DTC143ES
DTC143ZS
DTC144WS
FRONT FRONT
VIEW VIEW
B C E
E
BA4558 (IC701)
NJM2082D (IC201)
V
7
CC
A OUTPUT
A –INPUT
A+INPUT
3
V
CONT
GND
2
4
V
IN2
N.C.
6
Detector & Hysteresis
Integrator
Comparator Comparator
GND Vcc Vout
DTA114ES
PNP Type
C
B
R1
DTA114ES 10kohm
PMA-2000
V
1 8
1
B OUTPUT
2 7
2
B –INPUT
3 6
B +INPUT
V
4 5
DTC114ES
DTC143ES
DTC143ZS
DTC144WS
NPN Type
R1
B
R2
R2
R1
10kohm DTC114ES 10kohm 10kohm
DTC143ES 4.7kohm 4.7kohm
DTC143ZS 4.7kohm 47kohm
DTC144WS 47kohm 22kohm
IV R
C
E
R2
8