Components Description - Kenwood KDC-3023R Service Manual

Hide thumbs Also See for KDC-3023R:
Table of Contents

Advertisement

QQ
3 7 63 1515 0
SWITCH UNIT (X16-1472-7x)
Ref.No.
Application/Functions
IC1
LCD driver & key matrix
IC2
Remote Sencer
Q1
Key scan start
Q2,Q3 Key illumi SW
ELECTRIC UNIT (X25-961x-xx)
Ref.No.
Application/Functions
IC1
System control µ-com
IC4
Power amplifire
IC6
RDS decoder
IC7
Power supply (Multi AVR)
IC8
MUTE Logic
IC10
Tuner & E-Vol.
IC11
Power on reset
IC12
E2P-ROM
Q10
B.U. detector
Q20
A.C.C detector
Q40
MUTE driver
Q50
SW 5V
TE
L 13942296513
Q51
SERBO AVR control
Q55
SERBO AVR
Q70
Surge detector
Q101
DSI driver
Q102
PANEL 5V SW
Q201
Noise buffer
Q223,224 MUTE
Q252
S_METER RC & MPTH TC SW
Q253
S_METER RC & MPTH TC SW
Q501
AM RF amplifire
Q502
FM RF amplifire
Q503
MPX buffer
www
.

COMPONENTS DESCRIPTION

x
ao
u163
y
i
KDC-3023R,4024/V/Y/YV
8
Operation/Condition/Compatibility
When Q1 base goes Lo, key scan start.
When Q2 base goes Hi and Q3 base goes Lo, key illumination is Green.
When Q2 base goes Lo and Q3 base goes Hi, key illumination is Red.
Operation/Condition/Compatibility
System µ-com
E-Vol output encoder power amplification for speaker.
RDS data decode to tuner receive signals.
-
When a pin 1, 2, or 13 is "H", MUTE turns on
When a pin 3, 4, or 5 is "H", P-AMP mute turns ON.
Changer is RESET when a pin 9, 10, or 11 is "L".
FM/AM tuner & stereo decoder & E-Vol.
When B.U. 5V voltage is less than 3.5V, power reset.
Writing and read-out of adjustment data for a tuner
BU on (base "H") : Collector "H"
ACC ON (base : "H") : Collector "L"
Base "L" : Mute on (collector "L")
Q Q
Base "L" : SW5V on
3
6 7
1 3
Pin 2 "H" : Serbo on (pin 4 "H")
Base "H" : Serbo on
Base "H" : Surge detect
Base "H" : DSI on
Panel attch : PAN5V on
Tuner noise input, Emitter output
Base "H" : Mute on
Base "H" : RC&TC=Long (Base "L" at AF serch)
Emitter "H": Collector "H"
Base "H" : Gain UP
Gate "H" :Gain UP
MPX input buffer with RDS
.
2 9
9 4
2 8
1 5
0 5
8
2 9
9 4
m
co
9 9
2 8
9 9
3

Advertisement

Table of Contents
loading

This manual is also suitable for:

Kdc-4024/v/y/yv

Table of Contents