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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!
LC-12A2E
[4] Initialization
4-1. Connect the 81 pin and 82 pin of IC2001 (microcomputer) to GND, and turn on the power. 4-2. Select the model name (A2E/A2E(K)). 4-3. Select the inch size (12). 4-4. Return the 81 pin and 82 pin of IC2001 (microcomputer) to the original state.
[5] Transmission data by model
Transmission data
Model E2PROM adress Item Write Data OSD Display
[6] Adjustment
6-1. +B adjustment 1) Receive the E-12CH (PAL color bar). 2) Adjust the voltage of the 49 pin of SC401 to 5.00V±0.02V. Note: Since 5.0V is a reference voltage of all power voltage, adjust it precisely. 6-2. 38.9-VCO adjustment 1) Set the sound system to the B/G mode. 2) Send the CW signal of 38.9MHz, 90dBµV from SG to TP3201 (IF-OUT). 3) Adjust the L3231 coil so that a voltage of 2.5±0.2V is obtained at TP3203 (AFT). Note 1: The input impedance of the digital voltmeter must be 1M� or more. Note 2: To adjust L3231, use a non-magnetic driver. Note 3: No signal must not be input from the antenna. 6-3. 33.9-L�-VCO adjustment 1) Set the sound system to the L� mode. 2) Send the CW signal of 33.9MHz, 90dBµV from SG to TP3201 (IF-OUT). 3) Adjust the R3233 volume so that a voltage of 2.5±0.2V is obtained at TP3203 (AFT). Note 1: The input impedance of the digital voltmeter must be 1M� or more. Note 2: After performing the adjustment of the item 6-2, execute this item. Note 3: No signal must not be input from the antenna. 6-4. RF-AGC cut-in adjustment 1) Set the sound system to the B/G mode, and receive the E-12CH (PAL color bar). 2) Set the antenna input level to 56dBµV (75� termination, QP value). 3) Turn the R3231 (AGC volume) clockwise so that the voltage of the TP3202 (RF-AGC terminal) becomes maximal. 4) Turn it counterclockwise, and adjust the AGC terminal voltage to the point that is lower than the maximal voltage by 0.5±0.2V. 6-5. Opposed bias adjustment 1) Receive the monoscope pattern. 2) Adjust the "COM BIAS" so that the contrast of the stairway-shaped part may become the biggest.
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