Equipment Required; Adjustment Procedure - Sanyo Jj-P5 Service Manual

ADJUSTMENT PROCEDURES
pete pide REMARKS
Before adjusting the mechanism of this unit, wipe the tape
contacting surfaces clean as well as the contacting surfaces
of the driving parts with a cotton swab or a soft cloth soaked
in alcohol. Trouble may occur because of oil and grease
stains.
Handle the belt carefully the because grease easily attaches
to it. Then check the used rubber parts. If the rubber has
deteriorated or is scratched, replace the parts with new one.
EQUIPMENT REQUIRED
Frequency Counter
Dualtrace Oscilloscope
VTVM (2 sets)
Dummy Load (162)
Test Tapes
e 3kHz test tape (Example: TEAC MTT-111)
e 10kHz test tape (Example: A-BEX TCC-153)
Alignment Tool
ADJUSTMENT PROCEDURE
Adjustment
item
Tape Speed
Dummy Measuring
Headphones | vTVM
Frequency Counter
Oscilloscope
e This model features the Auto Reverse Mechanism. Then the
tape transport direction is distinguished as follows:
8 FORWARD DIRECTION:
The tape is wound counter-clockwise.
es REVERSE DIRECTION:
The tape is wound clockwise.
e When performing the adjustment while playing back the test
tape, set the tape transport to the FORWARD DIRECTION.
NOTE: 3
Before the Adjustments, set the control and switch as follows:
w Dolby NR Switch ........00000000 eee OFF
wm EBSS/BRSS Switch .......0000000 cee cece OFF
8 Volume Control ...00.0000 0 eee eee ees As desired
= Supply the regulated DC 1.5V power to the Ext. Power Jack
| TEAC MTT-111
for the adjustment.
Measuring
Adjustment Value Test Tape
3,000Hz + 3%
Maximum
A:-BEX TCC-153 Azimuth Screw
| Maximize two
| waveforms in phase.
Azimuth Adjusting Holes
Forward Side Reverse Side