Read Sony HS-RM436 / HS-RM439 Service Manual online
10
HS-RM436/RM439
SECTION 4
DIAGRAMS
Pin No
Pin name
I/O
Descliption
1
XOUT
O
Crystal oscillator output (75kHz)
2
TEST2
–
Not used (Ground)
3
PA3
I
Key input
4
PA2
I
Key input
5
PA1
I
Key input
6
PA0
I
Key input
7
PB3
O
Key output
8
PB2
O
Key output
9
PB1
O
Key output
10
PBO
O
Key output
11
BAND
O
Band select control
12
TV
–
Not used (OPEN)
13
SUPER BASS
O
Super bass on/off control
14
ID1
I
Distination select input
“L”
15
ID2
I
Distination select input
“H”
16
ID3
I
Distination select input
“H”
17
TAPE
I
Tape on detect input
18
BACK UP
I
Back up voltage input
19
AMP ON
O
Power ON/OFF signal output
20
BEEP
O
Beep signal output
21
BACK UP CHECK
I
Back up cancel input
22
BATT CHECK
I
A/D reference voltage input
23
REMOTE
I
Remote control A/D input
24
VSS
–
Ground terminal
25
MOTOR CTL
O
Motor control output
26
HOLD
I
Hold switch input
27
MUTE
O
Mute ON signal output
28
RADIO ON
O
Radio ON signal output
29
SD
I
Tuning signal detect input
30
PRE CTL
O
Preamplifier control output
31
DIR IN
I
Tape direction detect input (Fixed “L”)
32-44
S1-13
O
LCD segment output
45-48
COM1-4
O
LCD common output
49-52
DBR1-4
–
LCD power supply
53
RESET
I
Reset input (Fixed “H”)
54
TU VCC
–
Power booster for tuner
55
VDD
–
Power supply
56
FM IN
I
FM osc frequency input
57
AM IN
I
AM osc frequency input
58
VSS
–
Ground terminal
59
EO
O
Error (PWM) signal output
60
LPF IN
I
LPF input
61
LPF OUT
O
LPF output
62
LPF GND
–
Ground terminal
63
TEST 1
–
Not used (Ground)
64
X IN
I
Crystal oscillator input (75kHz)
4-1. EXPLANATION OF IC TERMINALS
IC801 LC72348W-9B64-E SYSTEM CONTROL
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