SECTION 
2 
SERVICE 
MANUAL 
MODEL 
GX-F31 
TABLE 
OF 
CONTENTS 
I.  SPECIFICATIONS  . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 
2-
2 
II.  CONTROLS  . . . . . . . . . . . . . . . . . . . . . . .  . . . . . . . . . . . . . . .  . . . . . 
2-
3 
III.  PRINCIPAL PARTS LOCATION 
............................. 
2-
4 
IV. 
VOLTAGE 
AND 
CYCLE  CONVERSION 
........................ 
2-
5 
V. 
MECHANICAL ADJUSTMENT  . . . . . . . . . . . . . .  . . .  . . . . . . . . . .  . . . 
2-
6 
VI.  HEAD ADJUSTMENT  .  . . . . . . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . 
2-
9 
VII.  AMPLIFIER ADJUSTMENT  . . . . . .  . . . . . 
. . . . . . . . . . . . . . . . . . . . .  2-11 
VIII. 
DC 
RESISTANCE OF HEADS 
............................... 
2-13 
IX. 
CLASSIFICATION 
OF 
VARIOUS 
P.C 
BOARDS 
.................. 
2-13 
I. 
P.C 
BOARD  TITLES AND  IDENTIFICATION NUMBERS 
.......... 
2-13 
2. 
COMPOSITION OF VARIOUS 
P.C 
BOARDS  . . .  . . . . . . . . . . . . . . . .  2-14 
For basic adjustments, measuring methods, and operating principles, refer 
to 
GENERAL TECHNICAL 
MANUAL 
2-1