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Thanks for offering this item at such a good price. Proved handy in identifying the part I was looking for my set.
Thanks again.
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This is the original manufacturers service manual, with detailed info on the circit boards, explosion drawings of all parts in assembly order, and tuning instructions. The only thing missing is the information on the dimensions of the various drive belts. mail me if you need them. gcrossman_at_aol.com
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Ordered service manuel for a hard to find plasma tv - your company made it easy to find and purchase - I will use you again
Thanks for your help
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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.
5 Troubleshooting
5-1-13 High Voltage Failure
No Check and replace IC401 and +12 V line.
WAVEFORMS
3 5.00 V (IC401, #28)
3
IC401 Pin 28 OSC pulse exists?
Yes No
10
Q402 Gate driving pulse exists? Yes No
Check and replace Q401.
CH1 P-P = 2.00 V CH1 RMS = 5.868 V
10 5.00 V (Q402, Gate)
11
Q402 Drain pulse exists?
Check and replace Q403 and L402.
Yes Done
CH1 P-P = 2.00 V
CH1 RMS = 7.692V
11 50.0 V (Q402, Drain)
5-1-14 ABL Failure
CH1 P-P = 50.0 V CH1 RMS = 73.7V
Input full white pattern to monitor.
IC101 Pin 22 input exists and varies with different patterns? Yes Check CN102. Yes T501 Pin 8 output exists?
No
Check and replace IC101.
No
Check and replace T501.
Yes IC201 Pin 26 output exists and varies with different patterns? Yes Done No Check and replace IC201.
PN15VT/VO PN15HT/HO
5-7
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