Circuit Description - Kenwood RDX-652 Service Manual

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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
*POWER
*VOLUME
*BALANCE
MUTING
PROTECTION
S. DIRECT
SUPER WOOFER
(RXD-752/E/W)
DISPLAY MODE
AMP *AUTO POWER SAVE
*MD/DVD INPUT LEVEL -3
*INPUT SEL.
(LISTEM MODE)
TE
L 13942296513
DOLBY PROLOGIC
DOLBY 3STEREO
DOLBY VIRTUAL
SURROUND
CENTER SP.
SURROUND SP.
DELAY TIME
*BAND
TUNER *FREQUENCY
*AUTO/MONO
*P.CH
*CLOCK
CLOCK *PROG. RECORDING
*PROG. TIMER PLAY
*PROG. EXECUTION
SLEEP TIMER
O.T.T.
*DIRECTION
DECK *RVS MODE
*A/B
*BACKED UP DATA
1-4 Mechanism initialization
1-4-1 CD mechanism
• Disc unclamps(traverse down).
• Rotary tray rotates(1/3 rotation).
www
• 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.
RXD-652/702/752/772S/852/A81/A601/A701

CIRCUIT DESCRIPTION

ITEMS
STANDBY
14
CENTER
OFF
OFF
OFF
+3
AUTO
OFF
TUNER
OFF
OFF
OFF
EXIST(SMALL)
EXIST
20 msec.
FM
LOWEST FREQUENCY
AUTO
--CH
0:00 (E/T/Q) 12:00 (OTHERS)
ON/OFF TIME
0:00 (E/T/Q) 12:00 (OTHERS)
ON/OFF TIME 0:00 (E/T/Q)
12:00 (OTHERS)
OFF
OFF
OFF
FORWARD
REVERSE (U MODE)
B
x ao u163
y
i
2 9
8
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
Destinat- Tuner
BAND
ion type
FM 87.5MHz~108.0MHz
K,P K1
AM
FM 87.5MHz~108.0MHz
K2
M,V,X,Y
AM
FM 87.5MHz~108.0MHz
M K3 MW
SW
FM 87.5MHz~108.0MHz
E1
M,V,X,Y
AM
FM 87.5MHz~108.0MHz
MW
M E3
SW
E1 FM 87.5MHz~108.0MHz
E
RDS AM
FM 87.5MHz~108.0MHz
E2
T MW
RDS
LW
FML
FMH 87.5MHz~108.0MHz
Q Q
MW
LW
Q Q
2-1 Discrimination of TUNER destination
3 6 7 1 3 1 5
Destina- R107
tion [½]
K 91k
M1 39k
M2 22k
T 13k
E 8.2k
Q 4.7k
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
SELECTOR
KEY
MODE
[EX.BASS]
+ AC ON TUNER
[S.WOOFER]
+AC ON
[INPUT] AUX
co
+ AC ON
.
9 4 2 8
Receiving Channel
IF
frequency range space
100kHz +10.7MHz
530kHz~1700kHz 10kHz +450kHz 10kHz
100kHz +10.7MHz
530kHz~1610kHz 10kHz +450kHz 10kHz
100kHz +10.7MHz
530kHz~1610kHz 10kHz +450kHz 10kHz
5.9MHz~17.9MHz 5kHz +450kHz
50kHz +10.7MHz
531kHz~1602kHz 9kHz +450kHz
50kHz +10.7MHz
531kHz~1602kHz 9kHz +450kHz
5.9MHz~17.9MHz 5kHz +450kHz
50kHz +10.7MHz
531kHz~1602kHz 9kHz +450kHz
50kHz +10.7MHz
531kHz~1602kHz 9kHz +450kHz
153kHz~279kHz 9kHz +450kHz
65.0MHz~74.0MHz 10kHz +10.7MHz
50kHz +10.7MHz
531kHz~1602kHz 9kHz +450kHz
153kHz~279kHz 9kHz +450kHz
0 5 8 2 9 9 4 2 8
Voltage
AVdd
[V]
10 k½
4.51
3.98
3.44
2.83
R107
2.25
1.60
FL INDICATION
• All the fluorescent display indicators
and LEDs light on.
• STANDBY and TIMER LEDs blink up.
• The all illminated state is cleared by
pressing any main unit keys or
m
remocon keys.
• AUX TEST
9 9
RF
25kHz
25kH
25kHz
5kHz
25kHz
9kHz
25kHz
9kHz
5kHz
25kHz
9kHz
25kHz
9kHz
9kHz
5kHz
5kHz
9kHz
9kHz
9 9
X13
IC1
91pin
(TYPE)
5