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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.
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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!
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Flowchart of Failure Analysis for The Video-system Assy
A
No audio output from subwoofer SUB-W Has the sound been emitted from the SubWoofer? NO Is sound muting set? NO Is the volume set to [0]? NO Is a signal output from IC4701 ? (31) (32) 41 YES Has the signal arrived at CN4005? YES NO Check the around of IC4701 and each input signal. If there was no problem, replace IC4701. YES Raise the volume then check again. YES Cancel muting then check again.
B
NO
Check the communication between IC4701 to CN4005.
NG
Replace Main Ass'y
Is a signal output from CN9003 ? YES Is a signal output from IC9001? (1) (7) 42 YES Has the signal come to TP9051 ? YES
NO
Check the Flexible cable between CN4005 and CN9003.
NG
Replace or reconnect flexible cable
NO
Check around IC9001.
NG
Replace Main Ass'y
NO
Check the contact between the CN9003 and R9042.
NG
Replace TANSHI Ass'y
C
Check the around of pin Jack.
*100Hz input. Sound volume is fixed to 25.
� Waveforms
41
IC4701 (31)(32)AC-SUBWOO V:200mV/div H:4msec/div
Stop
42
IC4701 (31)(32)DC-SUBWOO
Stop
IC4704 (1)(7)AC-SUBWOO V:200mV/div H:4msec/div
Stop
IC4704 (1)(7)DC-SUBWOO
Stop
D
E
F
20
1 2
PDP-507XC
3 4
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