Block Diagram; Components Description; Switch Unit (X16-2960-10) - Kenwood ez500 Service Manual

EZ500
QQ
3 7 63 1515 0
TUNER
AM+B
SW5V
A8V
AUDIO OUT
S-METER
PLL-DATA
PLL-CLK
IFC OUT
CD
MS DATA
MS CLK
SW1
SW2
SW3
SW4
M MUTE R
M MUTE L
M RST
M STOP
LO/EJ
MOSW
SERVO+B
A8V
BU5V
CD MECHA+B
CH
REQ C
CH CLK
DATA H
CH-CON
REQ H
TE
L 13942296513
DATA C
CH RST
CH MUTE
BACK UP
DAUGHTER UNIT
(X89- )

SWITCH UNIT (X16-2960-10)

Ref. No. Application / Function
IC1 LCD Driver
www
IC2 Remote Control IC
Q2 REMO ON SW
Q3 Key Illumination SW (Red)
.
Q4 Key Illumination SW (Green)
Q5 Dimmer Control
2

BLOCK DIAGRAM

Q201
BUFFER
IC1
SYSTEM
MICROPROCESSOR
BU5V
IC1
LCD DRIVER
WITH
KEY MATRIX
PANEL DET
S1
ROTARY
EJECT SW
ENCODER
DSI
LCD
EJECT ILLUMI
SWITCH UNIT (X16- )

COMPONENTS DESCRIPTION

Drives LCD
Controls the unit
x ao
y
The power supply of IC2 is turned on when base level goes "L"
Lights Red key-illumination when base level goes "H"
i
Lights Green key-illumination when base level goes "H"
Lights LCD Back Light when base level goes "H"
8
A8V
IC2
FM
FREE
AM
MP IN
E-VOL
LEVEL
&
CD
MPX
CH
AFS
FRONT
QUAL
IC6
MUTE
DRIVER
PRE MUTE
MUTE
P-MUTE
BEEP
EXT.AMP.CON
DIMMER
PHONE
ACC DET
B.U DET
PS1-0
PS1-1
PS1-2
PS2-0
PS2-2
SERVO+B
RST
CD MECHA+B
Q Q
3 6 7 1 3
IC8
RESET
IC2
REMOCON
S1
RESET SW
Q152
PANEL 5V
Operation / Condition / Compatibility
u163
.
2 9 9 4 2 8
AUX IN
Q351,352
PRE OUT
PRE MUTE
(REAR/NF)
Q355,356
PRE OUT
PRE MUTE
(FRONT)
IC4
BU5V
POWER
IC
THERMAL
BACK UP
PROTECT
SW5V
Q32
EXT AMP
Q31
DIMMER
TEL MUTE
Q3
ACC DET
Q2
B.U DET
BACK UP
Q1
SERGE DET
Q21 Q22
SERVO SW 14V
IC9
SW REG
1 5 0 5 8 2 9
BU5V
IC3
AM+B
FM+B
POWER
SUPPLY
A8V
IC
ILLUMI
BU5V
Q4
BU5V SW 5V SW5V
m
co
9 9
OUTPUT
MODE
CD,MP3
3600mV
FM 1800mV
AM 600mV
CH 3600mV
SP OUT
EXT.AMP.CON
DIMMER
MUTE
ACC
BACK UP
9 4 2 8 9 9
ANT CON
P CON