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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!
FUNCTION OF MICOM IC 9-2. PIN DESCRIPTIONS
PIN
1 80 78 77
PIN NAME
XIN XOUT EO1 EO2
DESCRIPTION
CONNECTION TO 4.5 MHz CRYSTAL
I/O
I O
OUTPUT COMPAIRED WITH PHASE IF LOCAL OSCILLATION FREQUENCY IS HIGHER THAN STANDARD FREQUENCY. OUTPUT IS HIGH, IF NOT OUTPUT IS LOW, AND IF SAME OUTPUT IS HIGH-Z. OUTPUT TERMINAL FOR AM 2ND CHANGE PUMP. (IF STANDARD FREQUENCY OF AM IS 90kHZ) --REFER TO ATTACHED PAGE. POWER TERMINAL
O O
71
EO3
O
76
VSS
73,31 VDD 75 74 72 70 69 FMIN AMIN SUBPD HCTR LCTR INPUT TERMINAL IF FM VCO(LOCAL OSCILLATION) INPUT RANGE: INPUT TERMINAL IF AM VCO(LOCAL OSCILLATION) INPUT RANGE: OUTPUT OF PLL LOCK UP SUB FOR SPEEDY PLL LOCK. REFER TO ATTACHED PAGE ABOUT CIRCUIT USED. INPUT TERMINAL OF FM IF COUNT INPUT RANGE : 107MHz + 30kHz, Vpp= INPUT TERMINAL OF AM IF COUNT INPUT RANGE : 450kHz + 1kHz (AM) : 450kHz + 0.37kHz (LW) Vpp= PART THAT CHECKS DAMAGE OF BACK-UP MEMORY AFTER COMING BACK TO (BACK-UP)MODE. REFER TO ATTACHED PAGE ABOUT CIRCUIT USED. CONTROL TERMINAL OF BACK UP MODE. IF INPUT IS HIGH, WORKING IS NORMAL. IF INPUT IS LOW, IT REVERTS TO BACK UP MODE. IF INPUT OF (ACC)IN IS LOW ACCORDING TO CLOCK OPTION CLOCK IS DISPLAYED. TEST PORT (CONNECTED TO GROUND) RECEIVING RDS DATA FROM RDS DEMODULATOR IC. REFER TO ATTACHED PAGE ABOUT DATA TIMING CHART. I I O I I
68
SNS_
I
67
HOLD_
I
79 2 12 11 55
TEST1 TEST2 PE2 PE3 INT1
I I I
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