Adjustment Procedures - Sanyo DR201 Service Manual

ADJUSTMENT PROCEDURES
GENERAL REMARKS
Before the adjustments, wipe off stains on the tape
contacting surfaces of the parts, the belt and pinch roller
with a soft cloth soaked in alcohol. Trouble may occur
because of oil and grease stains.
Carefully handle the belt because grease easily attaches to
it.
Check the rubber-used parts, If the rubber has quality
deterioration or scratch marks, replace the part with a new
one.
EQUIPMENT REQUIRED
VTVM
Frequency Counter
DummyLoad(6fL)
TestTapes
*
3kHz Test Tape (Example: TEAC MTT-111) for Tape
Speed Adjustment
*
8kHz Test Tape (Example: TEAC MTT-113C) for Head
Azimuth Adjustment
Alignment Tool
1. Before performing the adjustment, set the controls and
switches as follows:
................................
*
ATTENUATOR Switch OFF
........................................
*
PHASE Switch NOR
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
*
MONITOR Switch OFF
TAPE SPEED ADJUSTMENT
1. Connect a frequency counter to the earphone jack as
illustrated and insert a 3kHz test tape (Example: TEAC
MTT-11 1
)
into the cassette compartment.
Frequency Counter
3kHz
EAR
2. While playing back the test tape, adjust the potentiometer
PT02 by turning it through the adjusting hole of the Cabinet
Bottom with an alignment tool until the counter reads 3kHz.
Potentiometer (PT02) for Tape Speed Adjustment
HEAD AZIMUTH ADJUSTMENT
1. Connect a VTVM to the earphone jack as illustrated and
insert a 8kHz test tape (Example: TEAC MTT-113C) into the
cassette compartment.
VTUM (Max.)
0
EAR
2. While playing back the test tape, turn the azimuth adjusting
screw until theVTVM reads the maximum.
Adjustment
I I
r
Record/Play back Head
1
screw
3. After the adjustment, secure the adjusting screw with paint
or glue.
OUTPUT LEVEL ADJUSTMENT
The output level of this unit is adjusted to the average level of
personal computers and program tapes produced in each
company. If an error ocurrs during the load operation, adjust the
potentiometer PTO1 for the output level adjustment.
Potentiometer (PTO1)
for the output level adjustment.