(No.WA122<Rev.002>)5/7
D201
Diode for -26dB ATT circuit and Auto P-
Con control
D233
Diode for -26dB ATT circuit error prevention Prevents -26dB ATT circuit from turning on when P-CON is Hi
D215
Temperature protection circuit diode
5.1V Zener diode for the temperature protection circuit
D216
IC7
Temperature protection circuit
OP-AMP
Q203, Q204
Transistor for DC protection and ± 11.5V
power protection
Protection when there is abnormal DC output to SP OUT, or
when the voltage of the ± 11.5V power supply is abnormal
IC8
OP-AMP for primary overcurrent protection
circuit
Protection when the primary current is about 17A or higher.
Not latched. Automatic restoration after a few seconds.
D228
Diode for primary overcurrent protection
circuit
D208
Zener diode for BATT overvoltage detec-
tion circuit
Powers off when BATT voltage is 17V or higher.
Q215
Transistor for BATT overvoltage detection
circuit
D232
Zener diode for BATT reduced voltage de-
tection circuit
Powers off when BATT voltage is 7.8V or lower.
Q213, Q214
Transistor for BATT power ON/OFF control
D207
Zener diode for prevention of P-CON cir-
cuit error operation
Q211, Q212
Transistor for latched circuit
Latched circuit for DC protection and power protection
IC9
DC/DC converter control IC
D206
Diode for prevention of DC/DC IC error op-
eration
D214, D219
Diode for temperature protection control
Stops DC/DC converter oscillation and stops ± B supply when
temperature protection is detected.
Q210
Transistor for temperature protection control
Q205 - Q207
FET for DC/DC switching
Q208, Q209
Transistor for gate voltage drawout
D204, D205
Diode for gate voltage drawout
D224 - D227
Diode for ± B power rectification
Q216
Transistor for +11.5V power
Q217
Transistor for -11.5V power
D209, D210
Zener diode for ± 11.5V power
Q219, Q220
Transistor for reducing shock noise
Shuts down the +11.5V power faster than the -11.5V when
powering off.
Q226
Transistor for +5V power
Q227
Transistor for -5V power
D212, D213
Zener diode for ± 5V power
Q218
Transistor for -B+12V power
D211
Zener diode for -B+12V power
Q229, Q230, Q231
Transistor for use by auxiliary circuit during
reduction in the -B+12V power supply
D202, D229
Diode for use by auxiliary circuit during re-
duction in the -B+12V power supply
Q221
Transistor for D-AMP IC output ON/OFF
control
Q221 ON
→
AMP output OFF
Q222
Q222 ON
→
AMP output OFF
D217
Diode for D-AMP IC output ON/OFF control
Ref. No.
Application / Function
Operation / Condition / Compatibility
