Kenwood RDX-652, Service Manual

Page: 5 / 54

RXD-652/702/752/772S/852/A81/A601/A701
5
CIRCUIT DESCRIPTION
1. Initialization
1-1 Setting of initial conditions
While pressing the [ENTER] key, put the plug into an AC
power outlet.
1-2 Initializing operation
• A microcomputer is initialized for start when the AC
power is turned on when pressing the [ENTER] key. At
that time, CD mechanism and CASSETTE mechanism
are also initialized.
• During the initial operation,the display shows INITIALIZE
and after that it will be returned to STANDBY condition.
1-3 Initial items and back up data
*BACKED UP DATA
1-4 Mechanism initialization
1-4-1 CD mechanism
• Disc unclamps(traverse down).
• Rotary tray rotates(1/3 rotation).
• If a mechanism error occurs, CD ERR is indicated on the
display.
1-4-2 DECK mechanism
• When initial condition becomes NG for the third time,
decide the error. The error condition is displayed as X
ERR on the display.
1-4-3 Error display
• If both mechanism (CD/DECK) error occur, the display is
indicated as follows. CD & X ERR
2. Destination list of TUNER
ITEMS
*POWER STANDBY
*VOLUME 14
*BALANCE CENTER
MUTING OFF
PROTECTION OFF
S. DIRECT OFF
SUPER WOOFER
(RXD-752/E/W) +3
DISPLAY MODE AUTO
AMP *AUTO POWER SAVE OFF
*MD/DVD INPUT LEVEL -3
*INPUT SEL. TUNER
(LISTEM MODE)
DOLBY PROLOGIC OFF
DOLBY 3STEREO OFF
DOLBY VIRTUAL
SURROUND OFF
CENTER SP. EXIST(SMALL)
SURROUND SP. EXIST
DELAY TIME 20 msec.
*BAND FM
TUNER *FREQUENCY LOWEST FREQUENCY
*AUTO/MONO AUTO
*P.CH --CH
*CLOCK 0:00 (E/T/Q) 12:00 (OTHERS)
CLOCK *PROG. RECORDING ON/OFF TIME
0:00 (E/T/Q) 12:00 (OTHERS)
*PROG. TIMER PLAY ON/OFF TIME 0:00 (E/T/Q)
12:00 (OTHERS)
*PROG. EXECUTION OFF
SLEEP TIMER OFF
O.T.T. OFF
*DIRECTION FORWARD
DECK *RVS MODE REVERSE (U MODE)
*A/B B
KEY
SELECTOR
FL INDICATION
MODE
• All the fluorescent display indicators
[EX.BASS] and LEDs light on.
+ AC ON TUNER • STANDBY and TIMER LEDs blink up.
[S.WOOFER] • The all illminated state is cleared by
+AC ON pressing any main unit keys or
remocon keys.
[INPUT] AUX • AUX TEST
+ AC ON
Destinat-
ion
Tuner
type
BAND
Receiving
frequency range
Channel
space
IF RF
K,P K1
FM 87.5MHz~108.0MHz 10.7MHz 25kHz
AM 530kHz~1700kHz 10kHz +450kHz 10kHz
M,V,X,Y
K2
FM 87.5MHz~108.0MHz 10.7MHz 25kH
AM 530kHz~1610kHz 10kHz +450kHz 10kHz
M K3
FM 87.5MHz~108.0MHz 10.7MHz 25kHz
MW 530kHz~1610kHz 10kHz +450kHz 10kHz
SW 5.9MHz~17.9MHz 5kHz +450kHz 5kHz
M,V,X,Y E1
FM 87.5MHz~108.0MHz 50kHz +10.7MHz 25kHz
AM 531kHz~1602kHz 9kHz +450kHz 9kHz
M E3
FM 87.5MHz~108.0MHz 50kHz +10.7MHz 25kHz
MW 531kHz~1602kHz 9kHz +450kHz 9kHz
SW 5.9MHz~17.9MHz 5kHz +450kHz 5kHz
E
E1 FM 87.5MHz~108.0MHz 50kHz +10.7MHz 25kHz
RDS AM 531kHz~1602kHz 9kHz +450kHz 9kHz
T
E2
FM 87.5MHz~108.0MHz 50kHz +10.7MHz 25kHz
RDS
MW 531kHz~1602kHz 9kHz +450kHz 9kHz
LW 153kHz~279kHz 9kHz +450kHz 9kHz
Q Q
FML 65.0MHz~74.0MHz 10kHz +10.7MHz 5kHz
FMH 87.5MHz~108.0MHz 50kHz +10.7MHz 5kHz
MW 531kHz~1602kHz 9kHz +450kHz 9kHz
LW 153kHz~279kHz 9kHz +450kHz 9kHz
AVdd
10
R107
k
½
X13
IC1
91pin
(TYPE)
Destina- R107 Voltage
tion [
½
] [V]
K 91k 4.51
M1 39k 3.98
M2 22k 3.44
T 13k 2.83
E 8.2k 2.25
Q 4.7k 1.60
2-1 Discrimination of TUNER destination
3. Test mode
3-1 Test mode of the receiver
3-1-1 Setting of the test mode
While pressing the [INPUT] key or [EX. BASS or S.
WOOFER] key, put the plug into an AC power outlet.
3-1-2 Canceling of the test mode
Unplug an AC power cord from an AC power outlet.
3-1-3 Selector mode or FL indication
RXD-652(K) INT 1P 99.6.9 8:02 PM y [ W 10
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