Sanyo M-G12 - Wiring Diagram; Component and Connection Layout

ADJUSTMENTS
GENERAL REMARKS
Before adjusting the mechanism of this unit, wipe the tape
contacting surfaces of the Head, Pinch Roller and Capstan,
and the surfaces of the driving parts such as the Drive Belt,
Take-up Belt, Flywheel and Pulley 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. Then, check the used rubber parts. If the rubber has dete-
riorated or is scratched, replace the parts with new ones.
NOTES ON HANDLING THE CHIP ELEMENT
Pay due caution to the following items:
1.
Chip Element
Solder
2.
Do not use the removed chip element again.
Chip Element
Solder
YU)
x O
(Incorrect) (Correct)
P.C.Board
Use a soldering iron of less than 30W.
* The soldering iron should not touch the body of the chip
element.
Complete soldering in a short time.
Apply solder to the chip element as illustrated below.
EQUIPMENT REQUIRED
VTVM
Frequency Counter
Dummy Load (330 )
Test Tapes
* 3kHz test tape (Example: TEAC MTT-111) for the Tape
Speed Adjustment
* 10kHz test tape (Example: TEAC MTT-114) for the Head
Azimuth Adjustment
Alignment Tool
NOTE:
Before the Electrical Adjustments, set the unit as follows:
<i TORE SWICD): tc2 avd Radeakntn escllcarenuddets ouiece bout ves HIGH
* Mute Switch ........... ccc cece cece ec eeccneceueeeuceuavens OFF
* Balance Control ................0ceceeeee O (Center Position)
*
Supply a regulated DC 6V power to the Ext. Power Jack.
TAPE SPEED ADJUSTMENT
1.
Remove the Battery Compartment Lid and take out the bat-
teries from the compartment, and connect the regulated DC
6V power supply to the Ext. Power Jack.
Connect a frequency counter to the Headphones Jack as il-
lustrated and insert a 3kHz test tape (Example: TEAC
MTT-111) into the Cassette Compartment.
Frequency Counter
3kHz
PHONES
©
Dummy Load 330
3. While playing back the test tape, adjust the tape speed by
Potentiometer for
Tape Speed Adjustment
turning the potentiometer (P301) on the P.C.Board with an
alignment tool until the frequency counter reads 3kHz.