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Aiwa HS-RX490 Service Manual page 8

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Description
CD driver common.
Output LCD driver.
Not connected. Always output L.
Output P-SNSR-IN detected level.
H : IF 10.75, L : IF 10.7.
H : Enable dolby, L : Disable dolb.
area
area
J
L
L
E
U
L
H
H
H : No music, L : Exist music.
nput mechanism operation detection.
nput motor activate detection.
Reducing voltage mecha stop and key input control.
H : HOLD OFF, L : HOLD ON.
H : UP key on, L : OFF.
H : DOWN key on, L : OFF.
H : ENTER key on, L : OFF.
H : SW OFf, L : SW ON.
H : MOT ON, L : MOT OFF.
H : Hi-speed, L : Normal speed.
H : Clockwise, L : Counter clockwise.
H : Motor brake ON, L : OFF.
nput remote controller key.
nput main unit key.
H : FM mode, L : Except FM mode.
H : AM mode, L : Except AM mode.
H : When tunner muting, L : Except muting.
Output display data for remote controller.
nput serial clock.
Output buzzer.
Output FM MONO/ST switching.
H : Except standby mode, L : Standby mode.
H : Record mode, L : Except record mode.
Control reducing voltage detection circuit.
H : REV mode, L : FWD mode.
H : BST ON, L : BST OFF.
H : Dolby ON, L : Dolby OFF.
H : Metal mode, L : Normal mode.
13
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Pin No.
Pin Name
58
59
SCK-EEPROM
60
SDATA-EEPROM
61
EJECT-SW
62
63
TEST(NC)
64
65
TU-OUT
H
L
66
PLL-OUT
H
H
67
P-SNSR-IN
68
P-SNSR-CTL
69
70
71
72
73
74
75
76
77
78
79
80
I/O
CS
O
E
2
PROM R/W switching terminal.
2
O
Output E
PROM serial clock.
I/O
Input/output E
2
PROM.
I
H : Eject-SW OFF, L : Eject-SW ON.
MUTE
O
H : Mute OFF, L : Mute ON.
Not connected.
IF IN
I
Input IF signal.
O
H : Tuner mode, L : Except tuner mode.
O
Output phase comparator.
I
Input P-SNSR output waveform.
O
Control P-SNSR circuit power supply.
GND
Connected to ground.
FM-IN
I
Input FM programable counter.
AM-IN
I
Input AM programable counter.
VDD
Connected to VDD.
RESET
I
Input reset.
XOUT
O
Connected to crystall oscillator.
XIN
I
VXT
Power supply for crystal oscillator.
VLCD
C1
Reference voltage for LCD drive.
C2
VEE
1.5V constant voltage for LCD drive.
14
Description

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