XXV-03A
3
Ref. No
Application / Function
Operation / Condition / Compatibility
IC4,5
NAND
D class section reverse wave, deadtime, generation and rectification
IC6
Comparator
Short circuit detection of SP output
IC7
Signal amplification
For SP output short-circuit detection, send the output to comparator
IC10
Element operation control
Communication, display, protection, etc. control
IC11
Reset
Reset signal is output when voltage goes below standard voltage
IC13
DC/DC converter
Voltage on secondary side, which produces the drive signal for switching
element, will be limited to below standard voltage
IC14
Signal amplification
To have
µ
com display current value, amplify potential differences of GND
IC15
Bi-directional buffer
Send/Receive data and clock between AMP
IC16
Comparator
Receive from H/U data and clock
Q1,2,5,7
Digital signal transmission
Send LX-REQ-M signal to H/U
Q3,4,6,8
Digital signal transmission
Send LX-DATA-S signal to H/U
Q9
Mute
Mute drive signal generation
Q10
Mute
Turn audio signal OFF
Q15,18,19,21,22,27,
Signal amplification, switching
D class section voltage or current amplification
Q28,37~40,42~45
Q16,17
Voltage control
Match the beginning of the fall to +15V when -15V power supply is OFF
Q20
Voltage control
5V power supply ON/OFF
Q23,24,35,36,41,83
Voltage control
Fan voltage ON/OFF and limiting over voltage
Q25,29,84
AVR
+15V
Q26,30,110
AVR
-15V
Q31,33,46,109
Voltage control
D class section predrive stage power supply ON/OFF
Q47
AVR
D class section first stage supplementary power supply
Q52-55
Voltage current converter
Over current detection when SP is shorted
Q57,58,60,61,
Switching
DC/DC converter switching
In order to have
µ
com display voltage value, send voltage to it only when 5V SW ON
Pcon detection
Pcon over voltage detection
For SP output short-circuit detection, send the output to comparator
DC detection of output
Switching FET drive current amplification
DC/DC converter power supply ON/OFF
Q81,82
Voltage control
DC/DC converter drive waveform ON/OFF
Q88,89,98,99
Voltage control
5L digital signal reception
Q95,96
Voltage control
When Comm-SW of
µ
com is ON, turn communication system power supply ON
Q97
Voltage control
Normally 15V power supply and over voltage control
Q102,111
Voltage control
When Comm-SW of
µ
com is ON, turn communication system 5V power supply ON
Q103,104
Voltage control
LCD backlight and illumination LED control
Q106-108
AVR
µ
com system 5V power supply.
COMPONENTS DESCRIPTION
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