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This is a high quality manual with clear schematic and components layout diagrams ; with service procedure included.
 ;
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.
;
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!
ADJUSTMENT
A MAIN C.B
MECHANICAL EXPLODED VIEW 1 / 1
2
SFR 2
* P HEAD
VOLUME
VR1
*
3 FWD
TP1 (L-CH)
SFR 1
*
4ZM-2 P7NC
TP2 (R-CH)
A
*
C
B
PHONES
SFR 51
J1
1
Note :
4
1
2
2
* : On the other soldering pattern side.
1. Tape Speed Adjustment Settings : � Test tape : When the tape starts running smooth, this adjustment is not necessary. If wow is conspicuous at the beginning of the tape-run, perform this adjustment following the procedures below. 1) Solder resistor pattern (A) of the MOTOR AND GOVERNOR MATCHING ADJ. resistor group. 2) Set the tape speed (using speed adjustment SFR51). 3) Restrict the motor rotation by hand (or turn PAUSE ON). 4) Remove your hand and listen to the beginning of the tape-run. 5) When the rise of tape running is smooth, no more adjustment is necessary. If wow continues for 1 to 2 seconds at the rise time, change the combined resistance according to procedure 6 and check that the tape starts running smooth. 6) Solder the resistor pattern according to the table below Pattern Step (1) Step (2) Step (3) Step (4) Step (5) Step (6) Step (7) (NOTE :
A
Method :
TTA � 100 (Tape center) � Test point : Phones Jack (J1) � Adjustment location : SFR51 � MSP : CLASSIC � Tape selector : NORM � Volume : Non � clip (MAX � 10 dB down) Play back the test tape and adjust SFR51 so that the frequency becomes 3000 Hz ± 10 Hz. Then confirm WOW is less than 0.52%.
2. Dolby Level Adjustment Settings : � Test tape : � Test point :
TTA � 200 TP1 (L � CH) TP2 (R � CH) � Adjustment location : SFR1 (LCH)
Low resistance Open Open Open Open Solder Solder Solder
A
Medium B resistance Open Open Solder Solder Open Open Solder
High resistance Open Solder Open Solder Open Solder Open
C
Method :
SFR2 (RCH) � Dolby NR : OFF � Tape selector : NORM Play back (FWD) the test tape and adjust SFRs so that the test point becomes 100mV ± 1dB.
4. Azimuth Adjustment Setting : � Test tape : � MSP : � Volume :
TTA � 330 / TTA � 420 CLASSIC MAX
Method :
� Tape selector : NORM � Adjustment location : Head azimuth adjustment screw Play back (FWD) the test tape and adjust screw so that the 8 kHz signal output is maximum.
= 2.2 ohm, B = 8.2 ohm , C = 10 ohm)
7) Finally re-check the tape speed.
3. GOVERNER Check Perform the STOP �> PLAY and REVERSE operations (or PAUSE ON �> OFF) after the motor is replaced.
Caution : Cool the patterns down to normal temperature after soldering. If the pattern remains heated, the gorvernor circuit does not operate normally.
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