2
A
B
C
D
E
F
G
H
I
J
1
3
4
5
7
RX-V420/RX-V420RDS/HTR-5440/HTR-5440RDS/DSP-AX420
6
PROGRAM
EFFECT
A/B/C/D/E
PRESET
/TUNING
EDIT
OPERATION (1) P. C. B.
OPERATION (2) P. C. B.
PRESET/TUNING
FM/AM
INPUT MODE
6CH INPUT
MEMORY
MAN'L/
AUTO FM
TUNING
MODE
AUTO/
MAN'L MONO
INPUT
MODE
START
PTY SEEK
RDS MODE
/FREQ
E ON
To INPUT (1)
To INPUT (1)
MTMR
MTSW
CSY
SDM
YSSCK
SO
FMUT
MTC
SCN
SDD
/ICD
VDN
SCK
PR
V2
VUP
CEL
DMT
TUNED
MG
INT928
/ST
LC2
TMT
SCKP
CEP
6CH GAIN
SW2
SDRP
SDTP
/-10dB
SW1
SDRR
SDTR
SW3
SDSE
SCKA
LC1
MG
SI0
VPP2
+5B
U
/SCK0
VPP
/RES
SD0
To MAIN (1)
ER
Y
PR
V1
VP
PRD
PRI
MR
Y
S12
PR
Y
MG
PREMT
/HP
From OPERATION (7)
+5M
PSW
From OPERATION (2)
ADKEY2
MG
ADKEY1
5M
1
30
31
50
100
81
51
80
1
16
48
33
17
32
64
49
62
1
To OPERATION (1)
MG
ADKEY2
ADKEY1
5M
To INPUT (1)
From
OPERATION (8)
F2
F1
W441 Brown
■
PRINTED CIRCUIT BOARD (Foil side)
Ref. No.
Location
D901
B3
D902
C4
D903
D4
D904
D4
D905
D4
D906
D4
D907
B3
D908
B3
D909
B4
D910
B3
D911
B3
D912
B3
IC901
E4
IC902
C3
IC903
B3
Q901
F4
Q902
F4
Q903
E4
Q904
D4
Q906
D4
Q907
D3
Q909
B3
Q910
B3
Q911
G3
Q912
F3
• Semiconductor Location
E-41/J-37
E-42/J-38
Circuit No.
J
U, C
R, T
A, B, G
J901
X
X
X
O
J902
X
X
O
X
J903
O
X
X
O
J904
O
O
X
X
J1005
X
X
O
O
R908
X
O
O
X
R909
X
X
O
O
R935
X
X
O
X
X: NOT USED
O: USED / APPLICABLE