Sony SLV-E170EE - Page 94

4-1-7. ADJUSTMENTS AFTER REPLACING
THE DRUM (VIDEO HEAD)
Purpose: Co-relative height, X-value and other factors of the
drum will deviate from those of the guide roller. If the
drum is replaced properly, these deviations are
extremely small.
Precaution: Tum off the auto tracking and set the manual
tracking mode.
Playback
Alignment tape, blank tape
Measuring instrument | Oscilloscope
CH-1: Connector PB RF pin for RF PC
board check.
CH-2: Connector RF SW P pin for RF
PC board check.
Guide roller (refer to 4-1-2, 4-1-3.)
Switching position, Tracking preset, SP
delay mono-multi (Refer to the Service
Manual), X-value. (refer to 4-1-6.)
Measuring point
Adjustment locations
=A0—
[Adjustment Method]
Playback a new tape
Check it the tape
curls or wrinkles neer the
guide roller.
Perform fine adjustment
of the guide roller.
Playback the alignment
tape (Hi-Fi 400 Hz)
RF output does not
meets with the
standard se
Adjust the height of the
guide roller.
Check
the eveness of
the RF output. (Refer
to the following
section.)
RF output
meets with the standard.
Adjustment the switching
position.
RF output:
ts the RF output at
maximum when tracking
is set at the center
position
9
Yes (when Hi-Fi 400 Hz
alignment tape is used)
RF output:
Begins to drop at
the same tracking position
when the “[A]” and “fY]”
buttons are
pressed.
Adjustment the tracking
center.
Adjustment the switching
position.
Yes
Adjust the X-value
Check/adjustment
compieted.