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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.
;
reasonable price for the schematic - the service is perfect, all as expected and pointed by instructions - good scan of the original plans - thank you!
7-4. Printer Pin Arrangement Diagram
Connection RD terminal Pin No. 1 Pin No. 15 Connection Character selective magnet column No.1 13
(Not used)
2
16
Character selective 3 magnet column No.1 2 4
17
14
18
15
3 4
5 6
19 20
16 17
5 6
7 8
21 22
Ribbon shift magnet Electromagnet (+)
Notes: 1. Column numbers match the physical arrangement of the columns on the print wheels. 2. Column numbers are assigned from 1 to 18 from the frame motor side. 3. Pin numbers are assigned from 1 to 27 from the frame motor side. 4. The spark arrestor diode is connected as shown below.
7
9
M
23
Motor power supply (+) Detector power supply (+) Timing signal Detector power supply (�)
8
10
24
Electromagnet (+)
Driver
9
11
25 26
10
12
(Example of compatible diode: 1S2075K or equivalent)
11
13
27
Motor power supply (�)
12
14
Motor power ON/OFF
*1
0.2ms max.
Timing signal
*2 8.0ms min.
T0
T1
T2
T3
T4
T5
T6
T7
T8
T9
T10 T11 T12
TS
T(0)
0.7ms max. 8 0.7ms max. 0.7ms max.
0.7ms max.
80.0ms min.
2.0ms min.
Character selective magnet No.n Ribbon shift magnet
(Print operation) (Normal paper feeding operation)
Typ. 285.7ms
Notes: 1. The signals in must be prepared by the user. 2. The pulse is indicated by a dot-dash line (*1) is generated for continuous printing. The next print cycle can start immediately after the leading edge of the timing signal Ts. 3. As shown by a dashed line (*2), the timing signal may go low at motor power-on or upon reception of a Print command. �9�
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