SA-F21
2-1
2-2
SECTION 2
BLOCK DIAGRAMS
2-1. OVERALL BLOCK DIAGRAM
IC107
IC103
IC109
IC101
VOLUME,
TONE
CONTROL
IC104
IC102
HPF
IC301
POWER
AMP
IC601
HEADPHONE
AMP
+
+
IC105 (1/2)
IC105 (2/2)
SOUND
CONTROL
HPF
IC106 (2/2)
LPF
IC106 (1/2)
LIMITER
AMP
MUTE
DRIVE
L
R
INPUT
PJ101
MAIN BOARD
(SEE PAGE 3-7)
JACK BOARD
(SEE PAGE 3-8)
POWER BOARD
(SEE PAGE 3-15)
CONTROL BOARD
(SEE PAGE 3-11)
SPEAKER TERMINAL BOARD
(SEE PAGE 3-16)
SUB TRANSFORMER BOARD
(SEE PAGE 3-7)
AC IN
D810 – 813
D801
T802
T801
+VCC
RY801
HEADPHONES
J601
RY301
+
+
L
R
–
–
SPEAKER
IMP 4
Ω
RELAY
CONTROL
IC401
POWER
AMP
RY401
SP101
SUB WOOFER
IC501
IC802
IC502
SYSTEM
CONTROL
REG
+11V
+5V
–11V
+VSS
–VSS
AUTO POWER
DETECT
+5V REG
IC504
MUTE
SW DATA, SW CLK
VOL CLK,
VOL DATA, VOL CE
SW DATA, SW CLK
AUTO SW
STANDBY
VOL CLK, VOL DATA,
VOL CE
+VCC
FUNCTION
SWITCH
S501 – 504
LED
D502 – 511
RESET
+5V
05
L-CH
R-CH
SS-MS21
