4. BLOCK DIAGRAM
Isolator RCA input(AL) Buffer amp with gain LPF/HPF/Pass
Speaker
output
Bu (14.4V)
GND
System control
RCA input(SW_L)
RCA input(SW_R)
Isolator
Isolator
Buffer Amp LPF
-12/ -24dB
ATT
by
thermal
detector
Driver IC (IRS2092S)
of Power AMP
MOSFET(IRFB4227)
of output
MOSFET(IRF3205)
DC +/- 60V DC - 48V
DC - 16V
DC +/ - 15V DC +/ - 5V
Isolator RCA input(AR) Buffer amp with gain LPF/HPF/Pass
Isolator RCA input(BL) Buffer amp with gain LPF/HPF/Pass
Isolator RCA input(BR) Buffer amp with gain LPF/HPF/Pass
Gain volume
Gain volume
Invertor
Invertor
LPF
LPF
LPF
LPF
Driver IC (IRS2093M)
of Power AMP
MOSFET(IRF6775M)
of output
Speaker level input
(AL/AR/BL/BR)
ATT LPF Gain volume
Mixing Amp
Driver IC (TL494)
of DCDC
Trans former
DC +/ - 28V
DC +/- 60V, DC -48V, DC +/ -5V
DC +/- 28V, DC -16V, DC +/ -5V
DC +/- 15
Mixing Amp
Bass Boost RCU
Bass Boost
AB or SW
2CH or 4CH
Power on/off Over voltage detect
Thermal detect
Output DC detect
Output current detect
Output current detect
A
MAIN PCBA
4. BLOCK DIAGRAM