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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.
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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.
TROUBLE SHOOTING TABLE (Continued)
NO RASTER
CIRCUITS TO BE CHECKED: Tuner. PIF. Automatic Gain Control. Contrast, Brightness and Sound controls ?
Normal Replace the fuse.
14B2-TX/20B2-TX 21B2-TX
PICTURE, NO SOUND
Check F701. Blown out. (5V), (33V) Power Source. Does the noise level increase at max.
Noise increases but no signal is received.
(Approx. 310V at 220V AC)
No snow noise.
The fuse is blown out again.
Check T701 pin (7) voltage Abnormal
Check IC701, D701 and C707. NO YES
Normal 5V. BT must be approx. 32V D709.
Check the tuner supply voltage LB must Check R701, R707 and IC801 ? and CH preset data check.
Does signal appear at pin (40) of
Secondary Main+B Does signal Check IC801 and
Normal T701 (17) voltage appear at pin (38) its related circuit.
Check the tuner AGC NO YES at TP201. D758, IC702, IC753 Check CRT connector D1001 (Power LED Green) Check Q204 and Normal Abnormal
NO its related circuit.
D1001 (Power LED Red) Check pin (27) of IC801, Tuner and
Abnormal (Approx. 115V) Normal of IC801 ?
and R712. K1-K5 bias. turns on. YES
Abnormal Normal
Check pin (38) of on or turns ON/OFF. Check pin (1) of SF201 and IC801. Tuner's related circuit.
Checking the protector circuit.
R615 R618. Check pin (37) of IC801 and C878. IC801. related circuit.
Check ON/OFF ON
related circuit.
18
YES CIRCUITS TO BE CHECKED:
Bus error mode Does horizontal circuit See Fig.1 NO oscillate ?
Check IC801, IC751, D605 (44) of IC801. and Q601. » Sound Detector Circuit.
» Sound system pins (28) and » Sound Switch and Att. NO Does signal appear at pin (28)
NO SOUND
Control. (44) IC801 ? of IC801?
If a bus error happens, LED RED [pin (11) of IC801 LOW] indicator starts blinking and the
» Audio Output Circuit. power is turned off. YES The power key (CHANNEL button on the TV) is still effective. (Signal)
YES NO
Fig.1 EEPROM IC1003
V/C/J IC801
(6) and (8) of IC301 ? Check IC801. peripheral circuit.
NO (M24C08) Does signal appear at pins Check C356 and YES (IX3412CE)
AV Switch IC401
(M52797SP)
PLL Tuner TU201 2s 0.5s
(VTST5HD84)
P301 connector of Check Q301, pins (4) and (6) IC301 circuit. of IC801 and peripheral circuit.
18-1 18-2
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