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XR-Q150
@ Playback Adjustment
1. Head Azimuth Adjustment
* This unit is equipped with auto tape selector.
- Do not switch between forward and reverse operation with the screwdriver inserted.
[No.| Mode | Input Signal & Test Tape
Adjusting Points
Measurement Points | Adjustment
Value
TAPE TEST POINT
After adjustment, apply lock
Test tape STD-331E
Head azimuth adjustment
(L, Reh)
Max. playback
adjustment screw.
2. Playback Level Adjustment
+ Since this adjustment determines playback Dolby NR level, perform it carefully.
Input Signal & Test Tape
Adjusting Points
Adjustment Value
Remarks
TAPE TEST POINT
Test tape STD-331E
VR5401 (Lch)
(L, Reh)
Playback 315kHz, 0dB
VR5402 (Reh)
(CMPLX ASSY)
@ Recording Adjustment
1. Bias Oscillation Frequency Adjustment
If the DOLBY NR button is pressed for
T5501
2. Recording Bias Adjustment
four seconds while the power
is in
+ This adjustment affects the recording level, caution the increase of distortion factor by an under bias.
STANDBY mode, the frequency will de-
crease 2 - 3kHz when the power is on.
TAPE TEST POINT
-26 dBV
{L, Reh)
{CMPLX ASSY)
Repeat adjustment
until playback
level of the
10kHz signa! is within 0+0.5dB from
that of the
315Hz signal.
Load the STD-631 test tape
and set the recording
mode.
Between pins © and|
Oscillation frequency
@ of CN5401—
bv
to be 105.0kHz+2kHz
Input a 315Hz signal to the AUX
;
Input signal level
terminal and set to "AUX".
"
TAPE TEST POINT
(L, Reh)
(CMPLX ASSY}
Load the test tape STD-631, and
record/playback the 315Hz and 10kHz
signals. (See the nate below)
VR5501 (Lch)
VR5502 (Rch)
Note: Set the 10kHz input level to the same value as the 315Hz input signal level of step 1.
3. Recording Level Adjustment
Input Signal & Test Tape
Adjusting Points
Adjustment Value
Input a 315Hz signal to the AUX
TAPE TEST POINT
terminal and set the input selector to | Input signal level | (L, Rch)
-10 dBV
"AUX".
(CMPLX ASSY)
TAPE TEST POINT
(L, Reh)
(CMPLX ASSY)
Load the test tape STD-631 and
record/playback the 315Hz signal.
VR5301 (Lch)
VR5302 (Reh)
"Repeat recording, playback and adjustment untl
playback level of the 315Hz signal becomes -8.2dBV.
j o n a l
[inputsignallevel—_Taarcceer pony |tod8V
Confirm
that it
becomes -512.5dBV.
Input a 315Hz signal to the
AUX terminal and set the
input selector to "AUX".
Set to a level +10dB in
(L, Reh)
comparison with the input
(CMPLX ASSY)
level at step 1.
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