Fisher MC-715 - TAPE DECK ELECTRICAL ADJUSTMENTS; HEAD AZIMUTH ADJUSTMENT

TAPE DECK ELECTRICAL ADJUSTMENTS
EQUIPMENT REQUIRED
VTVM (2 sets)
Frequency Counter
Dummy Load (320)
Dualtrace Oscilloscope
Test Tapes
+ 3kHz Test Tape (Example: TEAC MTT-111)
Speed Adjustment
# 10OkHz Test Tape (Example: TEAC MTT-114) for Head
Azimuth Adjustment
Alignment Tool
for Tape
HEAD AZIMUTH ADJUSTMENT
Connect a dualtrace oscilloscope and a VTVM to both channel
outputs of the headphone jack as illustrated.
Oscilloscope
Then, set the dualtrace oscilloscope as follows:
$ MODE ...........ccececeeeecieeees savediensee ‘CHOP (chopped)
# SOURCE ...........cceebeeeeee .. INT (internal), CH1 or CH2
+ SWEEP MODE........... dieu eiestuch ea AUTO (automatic)
NOTE: De
Adjust the field on the oscilloscope with the VOLT. ADJ. and
TIME ADJ.
—~20-
1.
3.
Insert a 10kHz test tape (Example: TEAC MTT-1 14) into the
cassette compartment.
. While playing back the test tape, turn the azimuth adjusting
screw until the wave forms of the right and left channels are
superimposed and set to optimum at maximum reading on
the VTVM.
Adjustment
Sie
Record/Playback Head
Azimuth Adjustment Screw
After the adjustment, secure the adjusting screw with paint
or glue.