Kenwood AR-304, Service Manual

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AR-304/KRF-A4020
3
CIRCUIT DESCRIPTION
1. BACK UP DATA AND INITIAL STATE
1-1 BACK UP
(1) AMP
• POWER................................STANDBY
• INPUT SELECTOR ..............TUNER
• BALANCE ............................CENTER
• SPEAKER A RELAY ............ON
• SPEAKER B RELAY ............OFF
• VOLUME LEVEL .................-66dB
• BASS LEVEL .......................0dB
• TREBLE LEVEL ...................0dB
• INPUT LEVEL ......................0dB
• BASS BOOST ......................OFF
• SOURCE DIRECT ...............OFF
• TAPE2/MONITOR ................OFF
• SL16/XS8 .............................SL16
(2) TUNER
• BAND ...................................FM
• PRESET CHANNEL............."- - "
• FREQUENCY.......................LOWER LIMIT VALUE
K1 .................................FM:87.50MHz/AM:530kHz
E1/E3 ............................FM:87.50MHz/AM:531kHz
Q1 .................................FM:65.00MHz/AM:531kHz
• AUTO/MANUAL ...................AUTO
• DISPLAY MODE ..................FREQUENCY
• E ON THRUST RECEIVING ...........OFF
MODE
• T1 VOLUME .........................OFF(-66dB)
1-2 INITIAL SETTING
The initial setting is performed when the AC power cord
is plugged into the AC power wall out let while pressing
the power (STANDBY) key.
3. TEST MODE
3-1 SETTING
Turn the power ON while pressing the [BAND] key.
3-2 CANCELLATION
Unplug the AC power cord from an AC power wall outlet.
3-3 STARTING ACTIVE CONTENTS
1
The power on state is entered when the power is
tuned on while pressing the [BAND] key.
All functions are initialized and activated in the all
lighting mode.
2
All lighting mode is canceled when any main unit’s
keys are pressed. The normal display obtained when
the selector is set to TUNER then appears.
3
E2PROM check(E,T,Q,type only).
Check the reading data and the writing data of the
E2PROM after setting the test mode.
Display shows blank if the reading data and writing
data are the same. Display shows ”LW” if the different
data will be written to E2PROM.
3-4 ACTIVE CONTENTS
1
The mute control is not activated when the mode is
switched.
2
The test mode will be terminated by plugging it off the
power source or by initializing it when all the settings
will be initialized.
3
During the test mode, it can be operated in a special
manner that is different from an ordinary operation by
using the keys on the remote control or the main
body ,specifically as shown in the following table (3-5
CONTENTS).
4
Channel space will be no changed in the test mode.
3-5 CONTENTS
3-5-1 TUNER FUNCTION
WITH THE SELECTOR ON TUNER (E/T/Q TYPE ONLY)
D E S T I N A
TION
TUNER
T Y P E
BAND
RECEIVING
FREQUENCY
RANGE
C H A N N E L
S P A C E
I F
P L L
REFERENCE
FREQUENCY
D S W 3
( D 5 0 7 )
D S W 2
( D 5 0 5 )
D S W 1
( D 5 0 4 )
D S W O
( D 5 1 0 )
K,P K1(1700)
FM
AM
87.5MHz~108.0MHz
530kHz~1700kHz
100kHz
10kHz
+10.7MHz
+450kHz
25kHz
10kHz
0 0 0 0
M.X E1
FM
AM
87.5MHz~108.0MHz
531kHz~1602kHz
50kHz
9kHz
+10.7MHz
+450kHz
25kHz
9kHz
0 0 1 1
M K2(1600)
FM
AM
87.5MHz~108.0MHz
530kHz~1610kHz
100kHz
10kHz
+10.7MHz
+450kHz
25kHz
10kHz
0 0 0 1
E,T
E3
RDS
FM
AM
87.5MHz~108.0MHz
531kHz~1602kHz
50kHz
9kHz
+10.7MHz
+450kHz
25kHz
9kHz
0 1 0 1
Q
Q1
RDS
FML
FMH
AM
65.0MHz~74.0MHz
87.5MHz~108MHz
531kHz~1602kHz
10kHz
50kHz
9kHz
+10.7MHz
+10.7MHz
450kHz
5kHz
5kHz
9kHz
1 0 1 1
DSW0~DSW3(DIODE SW) * O: NONE DIODE,1:ADD DIODE
2. DESTINATION LIST OF TUNER
OPERATION KEY FUNCTION FL DISPLAY REMARKS
(EX.)
PTY
S LEVEL (1)(SLEVEL),(RF ATT)OFF
(1)
RF ATT (2)(SLEVEL),(RF ATT)ON
(2) (3)
(3)(NORMAL),(RF)ATT OFF
CYCLE
DISPLAY P.CALL UP
BASS BOOST P.CALL DOWN P.CALL FREQUENCY
TA/NEWS PI CODE PI 0000 PI CODE ON/OFF
Bass and treble are selected when the sound key is
pressed.
2
Tuned light
3-5-2 AMP FUNCTION
WITH THE SELECTOR ON SOMETHING OTHER THAN
TUNER
1
One touch max,min setting for Audio level.
SOUND KEY
KEY MASTER VR.
BASS TREBLE
BAND -89dB -10dB -10dB
AUTO 0dB +10dB +10dB
MEMORY -10dB 0dB 0dB
XS8 SL16
XS8/SL16 TUNED LIGHTS TUNED LIGHTS
SWITCH OFF ON
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