Recording Adjustments; Head Azimuth Adjustment; Level Meter Adjustment; Playback Frequency Response Check - Yamaha K-200 Service Manual

K-200
3. Head Azimuth Adjustment
a) Remove the cassette cover.
b) Connect two VTVMs and an oscilloscope to the
left and right channels of LINE OUT.
c) Play test tape TEAC MTT-114 (10 kHz) and turn
the R/P head azimuth adjustment screw so that
the outputs .of both left and right channels are
maximum, equal, and in phase.
d) After adjustment, apply screw lock paint.
4. Playback Frequency Response Check
a) Connect a VTVM to LINE OUT.
b) Play test tape TEAC MTT-216 (3180 + 120
/is : LH) or MTT-316 (3180 + 70/ts : Cr02) and
confirm that the 10-kHz reading is within ±3 dB
of the 315-Hz reading.
MTT-216
(MTT-316)
LINE OUT
VTVM
Recording Adjustments
1. Level Meter Adjustment
a) Connect an audio oscillator to LINE IN and a
VTVM to LINE OUT.
b) Put the deck into the record mode and apply a
1-kHz signal to LINE IN which will cause —7 dBm
(346 mV) at the LINE OUT.
c) Adjust VR 105 (left channel) and VR 106 (right
channel) so that the VU meter pointers read 0 dB
±1.5 dB.
2. Record Level Adjustment
a) Establish the same connections as for level meter
adjustment,above.
b) Put the deck into the record mode and apply a
315-Hz (1-kHz, 333-Hz) signal to LINE IN which
will read -7 dBm (346 mV) at LINE OUT.
c) Use the TDK SA C-60 Cr02 tape and record this
signal.
d) Adjust VR 103 (left channel) and VR 104 (right
channel) so that the recorded signal reads -7 dBm
(346 mV) upon playback.
VTVM
OSClLLArOH
0©fi
uoooo
oc
p
e
\ UNCOUT
* e:
-TaBm t<
3. Check of Recording Bias Current
*Set the DOLBY NR switch to OFF.
a) Connect an audio oscillator to LINE IN and a
VTVM and distortion meter to LINE OUT.
b) Apply a signal to LINE IN which will read —27
dBm (34.6 mV, -20 VU) at LINE OUT.
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