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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!
Motherboard Description
1.2 Processor
The motherboard supports a single Intel Pentium II processor. The processor�s VID pins automatically program the voltage regulator on the motherboard for the required processor voltage. In addition, the host bus speed (66 MHz and 100 MHz) is automatically selected.
CAUTION
The WS440BX motherboard supports Pentium II processors with a 100- or 66-MHz host bus. Processors with a 100-MHz host bus should be used only with 100-MHz SDRAM; the motherboard will not operate reliably if a processor with a 100-MHz host bus is paired with 66-MHz SDRAM. Processors with a 66-MHz host bus can be used with 66-MHz or 100-MHz SDRAM. The processor is packaged in a Single Edge Contact (S.E.C.) cartridge. The cartridge includes the processor core, second-level cache, thermal plate, and back cover. The processor connects to the motherboard through the 242-contact slot connector. When mounted in the 242-pin edge connector, the processor is secured by a retention mechanism attached to the motherboard. Processors with passive heatsinks are stabilized by a heatsink support that is attached to the motherboard. The motherboard supports the following processors:
Processor Type Pentium II processor Processor Speed (in MHz) 233 266 300 333 350 400 450 Host Bus Speed (in MHz) 66 66 66 66 100 100 100 Packaging Type S.E.C. cartridge
1.2.1
Second-Level Cache
The 512 KB second-level cache is located on the substrate of the S.E.C. cartridge. The cache includes pipelined burst static RAM (PBSRAM) and tag RAM. All supported onboard memory can be cached.
1.2.2
Processor Upgrades
The motherboard can be upgraded with a Pentium II processor that runs at a maximum speed of 450 MHz. When upgrading the processor, use the BIOS configure mode to change the processor speed (see Section 1.14).
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