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This is a high quality manual with clear schematic and components layout diagrams ; with service procedure included.
 ;
This service manual for the Kenwood KT-990D was reproduced really well ,is very legible and manual is complete.Combined with the low price paid,in the future,I will be checking Owner-Manuals.com any time I need a manual.
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When I purchased this manual I had my doubts regarding the quality as the price was so reasonable as compared to other outlets.
The manual itself is of high standard the print is very clear as are the diagrams. Obviously with the diagrams one has to zoom in otherwise it is to small to be able to read.
Overall I am very pleased with the company who delivered as they said and with the manual they supplied.
I occasionally require a manual and now having registered with this company I shall order from them in the future.
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I was at first dubious about payiong for downloaded manuals but having done so, I was extremely impressed with quality of the two manual I ordered, well worth the small price I paid.
I would highly recommend these to my friends.
;
reasonable price for the schematic - the service is perfect, all as expected and pointed by instructions - good scan of the original plans - thank you!
RXD-402/452/502/552/572S/A41/A51
CIRCUIT DESCRIPTION
1. Initialization
1-1 Setting of initial conditions
While pressing the [ENTER] key, put the plug into an AC power outlet.
2. Destination list of TUNER
Destinat- Tuner ion type BAND K,P M,V,X,Y M M,V,X,Y M K1 K2 K3 E1 E3 E1 E T RDS E2 RDS FM AM FM AM FM MW SW FM AM FM MW SW FM AM FM MW LW Receiving frequency range 87.5MHz~108.0MHz 530kHz~1700kHz 87.5MHz~108.0MHz 530kHz~1610kHz 87.5MHz~108.0MHz 530kHz~1610kHz 5.9MHz~17.9MHz 87.5MHz~108.0MHz 531kHz~1602kHz 87.5MHz~108.0MHz 531kHz~1602kHz 5.9MHz~17.9MHz 87.5MHz~108.0MHz 531kHz~1602kHz 87.5MHz~108.0MHz 531kHz~1602kHz 153kHz~279kHz Channel space IF RF 25kHz 100kHz +10.7MHz
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.
10kHz +450kHz 10kHz 100kHz +10.7MHz 25kH 10kHz +450kHz 10kHz 100kHz +10.7MHz 10kHz +450kHz 5kHz +450kHz 50kHz +10.7MHz 9kHz +450kHz 50kHz +10.7MHz 9kHz +450kHz 5kHz +450kHz 50kHz +10.7MHz 9kHz +450kHz 50kHz +10.7MHz 9kHz 9kHz +450kHz +450kHz 25kHz 10kHz 5kHz 25kHz 9kHz 25kHz 9kHz 5kHz 25kHz 9kHz 25kHz 9kHz 9kHz 5kHz 5kHz 9kHz 9kHz
1-3 Initial items and back up data
ITEMS *POWER *VOLUME *BALANCE MUTING PROTECTION AMP S. DIRECT DISPLAY MODE *AUTO POWER SAVE *MD/DVD INPUT LEVEL *INPUT SEL. *BAND TUNER *FREQUENCY *AUTO/MONO *P.CH *CLOCK CLOCK *PROG. RECORDING *PROG. TIMER PLAY SLEEP TIMER O.T.T. *DIRECTION *RVS MODE *A/B STANDBY 14 CENTER OFF OFF OFF AUTO OFF -3 TUNER 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 FORWARD REVERSE B
Q
Q
FML 65.0MHz~74.0MHz FMH 87.5MHz~108.0MHz MW 531kHz~1602kHz LW 153kHz~279kHz
10kHz +10.7MHz 50kHz +10.7MHz 9kHz +450kHz 9kHz +450kHz
2-1 Discrimination of TUNER destination
Destination K M1 M2 T E Q R107 [½] 91k 39k 22k 13k 8.2k 4.7k Voltage [V] 4.51 3.98 3.44 2.83 2.25 1.60
AVdd 10 k½ X13 IC1 91pin (TYPE)
R107
3. Test mode
3-1 Test mode of the receiver
3-1-1 Setting of the test mode While pressing the [INPUT] key or [BAND] 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 Condition in test mode � Power � � � � ON � EX.BASS � � � OFF � S.W � � � � � � � OFF � Selector mode or FL indication
KEY SELECTOR MODE FL INDICATION � All the fluorescent display indicators and LEDs light on. [BAND] + AC ON TUNER � STANDBY and TIMER LEDs blink up. � The all illminated state is cleared by pressing any main unit keys or remocon keys. � AUX TEST
DECK
*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
[INPUT] + AC ON
AUX
5
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