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A
B
RX-V420/RX-V420RDS/HTR-5440/HTR-5440RDS/DSP-AX420
SCHEMATIC DIAGRAM (OPERATION)
1
4.8
~
~
~
2
3
4
5
4.8
4.8
4.8
4.8
-50.9
-50.9
6
7
8
# All voltage are measured with a 10MΩ /V DC electric volt meter.
# Components having special characteristics are marked s and must be replaced
with parts having specifications equal to those originally installed.
# Schematic diagram is subject to change without notice.
9
E-56/J-52
C
D
E
FL DISPLAY
4.8
4.8
4.8
4.8
4.8
~
~
~
~
~
~
~
~
~
~
~
~
FL DRIVER
~
-29.5
~
-29.2
~
~
~
~
~
-29.2
~
~
~
~
~
-29.2
~
~
~
-29.2
~
~
~
-29.2
-29.5
4.8
4.8
0
MAIN µ–COM
4.8
4.8
0
0
11.9
0
0
0
4.8
&5
5.2
1
4.8
0
4.8
4.8
0
2.5
2.9
4.8
4.8
0
4.8
0
0
0
MAIN L
12.0
-0.1
-0.1
0.1
0.1
-11.9
Point 1 Pin 38 of IC902
F
G
2
12.7
B
5.6
5.2
0
0.6
0
0
0
12.7
A
0
12.7
4.8
5.6
12.0
7.3
6.6
5.2
0.047F/5.5
0
0.5
0
2.7
0.5
0.3
0
0
0
0
12.0
0
0
0
0
3.3/50
0
0
0
0
3.3/50
-11.9
Point 2 emitter of Q910
and collector of Q911
Q910 E
Q911 C
POWER ON
POWER OFF
(Connect the power cord)
(Disconnect the power cord)
H
I
0.6
0.6
0
0
-48.3
-49.2
-1.1
-48.3
-48.9
-50.4
-49.2
-49.8
-49.8
-49.8
0.6
-49.3
0.6
-49.3
0
0
0
0
-48.3
-49.2
0
0
-1.1
-48.3
-48.9
MAIN L
0.6
33P/500
0.6
0
0
REAR L
-48.3
-49.2
-1.1
-48.3
CENTER
-48.9
0.6
33P/500
0.6
0
0
-49.2
-48.3
-1.1
-48.3
-48.9
0.6
13.4
39.1
0.6
13.9
0
0
-48.3
-49.2
0
-1.1
-48.3
-48.9
PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS.
NJM78L05A-T3
2SA893A
2SA933S
2SB1565
2SC4488
1SS133
2SC1890A
2SD1991A
HZS5B2TD
2SC2229
DTC144ES
HZS5C2TD
HZS6B2TD
HZS7A2TD
HZS7B2TD
Anode
HZS12C2TD
HZS222TD
3: OUT
B
C
2: GND
E
E
B C
E
C B
C B
E
Cathode
J
K
L
MAIN L
11.8
0
0
0
0
0
0
CENTER
-11.7
11.8
0
0
3.3/50
0
0
0
3.3/50
0
-11.7
11.8
0
0
0
3.3/50
18K
18K
0
0
3.3/50
0
-11.7
HZS182
HZS182
HZS182
VM97600
VM97600
VM97600
MTZJ18C
MTZJ18C
MTZJ18C
VG44150
VG44150
VG44150
HZS182
HZS222
HZS222
HZS222
VM97600
VM97620
VM97620
VM97620
MTZJ18C
MTZJ22D
MTZJ22D
MTZJ22D
VG44150
VG44230
VG44230
VG44230
x: NOT USED
O: USED / APPLICABLE
D664, 665
901, 902,905-908, 910, 912
D661
HZS182
MTZJ18C
D662
HZS222
MTZJ22D
IC902
UPD78F4218AGF-3BA
UPD78F4216A
µPC4570C
NJM2068L-D
LB1641
LC75725E
48
33
49
32
10
8
8
4
1
64
17
1: IN
1
1
1
16
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