18.1. Cassette Deck Section
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•
•
•
Measurement Condition
−
−
−
−
Reverse-mode selector switch:
−
−
−
−
Tape edit: NORMAL
−
−
−
−
Make sure head, capstan and press roller are clean.
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−
−
−
Judgeable room temperature 20 ± 5 °C (68 ± 9°F)
•
•
•
•
Measuring instrument
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−
−
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EVM (DC Electronic voltmeter)
−
−
−
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Digital frequency counter
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•
•
•
Test Tape
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−
−
−
Tape
speed
gain
adjustment
(3
kHz,
-10
dB);
QZZCWAT
18.1.1. Head Azimuth Adjustment (Deck
1/2)
Caution:
•
•
•
•
Please replace both azimuth adjustment screw and springs
simultaneously when readjusting the head azimuth. (shown
in Fig. 2) Even if you wish to readjust the head azimuth
without replacing the acrews and springs, a fine adjustment
to the azimuth screw and spring.
•
•
•
•
Please remove the screw-locking bond left on the head
base when replacing the azimuth screw.
•
•
•
•
If you wish to readjust the head azimuth, be sure to adjust
with adhering the cassette tape closely to the mechanism
by pushing the center of cassette tape with your finger.
(shown in Fig. 3)
1. Playback the azimuth adjustment portion (8 kHz, -20dB) of
the test tape (QZZCFM) in the forward play mode. Vary the
azimuth adjustment screw until the output of the R-CH (PB
OUT-R) are maximized.
2. Perform the same adjustment in the reverse play mode.
3. After the adjustment, apply screwlock to the azimuth
adjusting screw.
18.1.2. Tape Speed Adjustment (Deck 1/2)
1. Set the tape edit button to “NORMAL” position.
2. Insert the test tape (QZZCWAT) to DECK 2 and playback
(FWD side) the middle portion of it.
3. Adjust Motor VR (DECK 2) for the output value shown
below.
Adjustment target: 2940 ~ 3060 Hz (NORMAL speed)
4. After alignment, assure that the output frequency of the
DECK 1 FWD are within ±60 Hz of the value of the output
frequency of DECK 2 FWD.
Fig. 1
18.1.3. Bias Voltage Check
1. Set the unit “AUX” position.
2. Insert the Normal blank tape (QZZCRA) into DECK 2 and
the unit to “REC” mode (use “
l
REC/STOP” key).
3. Measure and make sure that the output is within the
standard value.
Bias voltage for Deck 2
14±4mV (Normal)
Fig. 2
Fig. 3
18 Measurements and Adjustments
63
Summary of Contents for SC-TM900DVD
Page 9: ...10 Operation Procedures 9 ...
Page 10: ...10 ...
Page 11: ...11 Disc information 11 ...
Page 12: ...12 ...
Page 15: ...15 ...
Page 35: ...Step 2 Remove DVD traverse deck by rotating to the arrow direction 35 ...
Page 39: ...39 ...
Page 40: ...16 17 3 Replacement for the traverse deck Follow the Step 1 Step 10 of item 16 17 2 40 ...
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Page 65: ...18 3 1 Cassette Deck Section 18 3 2 Adjustment Point 18 3 Alignment Points 65 ...
Page 77: ...20 Voltage Measurement This section is not available at time of issue 77 ...
Page 107: ...35 6 6 7 7 7 7 7 7 6 U 2 2 2 0 2 1 2 2 1 2 2 1 2 1 2 2 2 4 6 35 ...
Page 109: ...0 7 7 7 2 2 2 3 4 6 EW ODEL GT IC OTE ATERIAL 3IZE MODIFIED 0 4 25 ...
Page 110: ...2 0 7 2 0 5NIT MM 0ARTS NO AME PPROVED HECKED 3 ...
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Page 139: ...26 1 Deck Mechanism RAA3413 S 26 1 1 Deck Mechanism Parts Location 139 ...
Page 140: ...140 ...
Page 142: ...26 2 DVD Loading Mechanism 26 2 1 DVD Loading Mechanism Parts Location 142 ...
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Page 145: ...26 3 Cabinet 26 3 1 Cabinet Parts Location 145 ...
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Page 188: ...3 Connection of the Wiring Diagram 4 Cabinet Parts Location 5 service m speaker 11 ...
Page 192: ...3 Connection of the Wiring Diagram 9 service m speaker ...
Page 193: ...4 Cabinet Parts Location 3 10 service m speaker ...
Page 198: ...3 Connection of the Wiring Diagram 4 Cabinet Parts Location 15 service m speaker ...
Page 203: ...3 Connection of the Wiring Diagram 4 Cabinet Parts Location 20 service m speaker ...