Tape Deck Adjustments; Head Replacement - Sanyo DC-D9 Service Manual

TAPE DECK ADJUSTMENTS
Measuring Adjust Adjust
Adjustment Item
Test Tape Output connection
Note
Instrument location value
(a) HEAD AZIMUTH
VTT738 etc.
AC-voltmeter
SPEAKER TERMINAL
HEAD AZIMUTH
TAPE "8"
Max.
(l OkHz) SCREW
---
(b) HEAD AZIMUTH VTT738 etc.
AC-voltmeter
SPEAKER TERMINAL HEAD AZIMUTH
TAPE "A"
Max.
---
(lOkHz)
SCREW
(c) MOTOR SPEED
MTT-111 FREQUENCY
(NORMAL)
(3,000 Hz)
COUNTER
SPEAKER TERMINAL SVRO1
3,000 Hz
..-
a.
(a)
(1)
(2)
(3)
(4)
(b)
HEAD REPLACEMENT AND AZIMUTH ADJUSTMENT
Head replacement
After replacement, demagnetize
the heads by using a degausser.
Be sure to clean the heads
before attempting to make any
adjustments.
Be sure both channels (1 and 2)
are the same level
(Using a dual-channel oscilloscope).
All wiring should be returned to
the original position after work
is completed.
.
Head azimuth
TAPE "A"
TAPE "B"
-
E. HEAD
RIP
TAPE "A"
HEAD
PLAY HEAD
(1) Load a test tape (VTT-738, etc.: 10 kHz) for azimuth
adjustment.
(2) Press the PLAY button.
(3) Use a flat-tip ( - ) screwdriver to turn the screw for
azimuth adjustment so that the left and right outputs
are maximized at the same phase during playback.
(4) Press the STOP button.
TAPE "B"
(1)
(2)
(3)
(4)
..
Load a test tape for azimuth adjustment.
Press the PLAY button.
Azimuth screw adjustment.
Press the STOP button.
After making the adjustment,
secure the azimuth
adjustment screw by applying screw lock (TB- 1401 B).
-13-
.
.:. -