Yamaha f-20B Musical Instrument Amplifier User Manual


 
7
F-20B
HIGH MID LOW MID BASS AUX IN PHONES
POWER
to SPEAKER
to MAIN 2/2 CN4
from POWER
TRANSFORMER
to POWER
TRANSFORMER
from AC CORD
to POWER SW
A'
A
INPUT
GAIN
SELECT
VOLUME TREBLE
A'
A
MAIN1/2 CIRCUIT BOARD
CIRCUIT BOARDS
MAIN 1/2 (J, U, C): CNA-V755470
MAIN 1/2 (H, B): CNA-V755480
MAIN 2/2 (J, U, C): CNA-V755470
MAIN 2/2 (H, B): CNA-V755480
MAIN2/2 CIRCUIT BOARD
Component side
to MAIN 1/2 CN5
VERSION
FUSE
RATE
INDICATION
J, U 250V 315mAL
E, BS 250V T160mAL
Must be
erased
Must be
erased
Component side