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This is a high quality manual with clear schematic and components layout diagrams ; with service procedure included.
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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.
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reasonable price for the schematic - the service is perfect, all as expected and pointed by instructions - good scan of the original plans - thank you!
KDC-5019/519/7021/7021Y/8020/B7021
MICROCOMPUTER'S TERMINAL DESCRIPTION
Pin No. 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66-69 70 71 72 73 74 75 76 77 78 79 80 81 82 Pin Name CH-RST CH-MUTE CH-CON ILL-ON M-MUTE L M-MUTE R BVDD BVSS M-RST M-STOP N.C. LO/EJ MOSW N.C. CD-SW3 DA-SDA/NC LCE N.C. AV CONT AVDD AVSS AVREF PHONE SRM-SW3 SRM-SW1 SRM-SW2 SRM-DET NOISE S-METER R-DATA R-QUAL I/O O I O O I I O O O I/O O O I O O O O I I I Description Reset output to changers Mute request from changers Changer control Illumination AVR on/off control output Mute request (L Ch.) from CD MECHA. MI-COM. Mute request (R Ch.) from CD MECHA. MI-COM. Positive power supply connection terminal Ground connection terminal Reset output to CD mechanism MI-COM. Stop request to CD mechanism MI-COM. CD mechanism loading/Eject switching output CD mechanism loading motor control output Down & limit switch detection input Clock output to D/A converter (V-LED model) CE output to LCD driver IC Processing Operation : Reset Hi: Mute request Lo: Standby mode, Hi: Operation mode Hi: POWER ON mode except panel detached Lo: Mute request Lo: Mute request Connected to BU 5V lines. Connected to GND lines. Lo: Reset Lo: Stop mode, Hi: Operation mode Not used(N.C.) Lo: Loading, Hi: Eject, Hi-Z: Stop or Break Hi: CD loading/eject action or Break, Lo: other Not used(N.C.) Hi: Chucking, Lo: Pickup most inner position Lo: Panel detached, momentary power down detected
83 IFC-OUT 84,85 N.C. 86 SRM-B
87 88 89 90 91 92 93 94 95 96 97 98 99 100 6
R-CLK CH-REQC KEY-REQ CD-SW1 CD-SW2 SRM+B BU-DET CH-DATAC CH-DATAH CH-CLK L-DATA L L-DATA S L-CLK PAN5V
Not used(N.C.) A/D converter reference voltage control output Hi: Active, Connected to AVREF terminal A/D converter positive power supply connection terminal Connected to BU 5V lines. A/D converter ground connection terminal Connected to GND lines. A/D converter reference voltage input terminal PHONE detection input 1V or less: TEL MUTE, 2.5V or greater: NAVI MUTE Mask mechanism position SW3 input Panel: (SW1,SW2,SW3)=(Lo,Lo,Hi) Angle: (SW1,SW2,SW3)=(Hi,Hi,Lo) I Mask mechanism position SW1 input Eject: (SW1,SW2,SW3)=(Hi,Hi,Hi) I Mask mechanism position SW2 input Mask : (SW1,SW2,SW3)=(Lo,Lo,Lo) I Mask mechanism detection input Lo: Mechanism detected, Hi: mechanism not detected I FM noise detection input I S-meter input from F/E Except RDS, RBDS model: Not used(pull down to I Data input from the RDS decoder IC GND lines) Except RDS, RBDS model: Not used(pull down to I Quality input from the RDS decoder IC GND lines) I F/E IFC OUT input terminal Lo: Station detected, Hi: Not detected I Not used(pull down to GND lines) Standby: (SRM+B,SRM-B)=(Lo,Lo) Clock wise: (SRM+B,SRM-B)=(Hi,Lo) O SRM mechanism submotor control output Counter clock wise: (SRM+B,SRM-B)=(Lo,Hi) Break: (SRM+B,SRM-B)=(Hi,Hi) Except RDS, RBDS model: Not used(pull down to I Clock input from the RDS decoder IC GND lines) I Request input from changers Lo: Request I Communication request from LCD driver IC I Loading SW detection input Lo: Loading start I 12cm disc detection SW input Lo: 12cm disc detected O SRM mechanism submotor control output Hi : When momentary power down detected or BU OFF I Momentary power down detection input Lo : BU ON I Data input from changers O Data output to changers I/O Clock input/output with changers I Data input from the LCD driver IC O Data output to the LCD driver IC Clock output to the LCD driver IC I/O /Panel detaching detection input(LCD Driver) Lo: Panel attached O Panel 5V control Hi: Panel attached, Lo: Panel detached
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