6
KRF-V7300D/V8300D/V9300D
●
Semiconductor Working Description (X08-3502-70)
Ref. No.
Parts No.
Description
Logic
D207,208
1SS402-F
The protection for the input of IC204 from static electricity.
D301
1SS302-F
The protection for the circuit from static electricity.
D311
1SS302-F
The protection for the circuit from static electricity.
D391
UDZW4.7 (B)
The power supply for the MIC circuit.
D392,393
UDZW18 (B)
The protection for the input of IC204 from static electricity.
D401
UDZW3.9 (B)
The power supply for the protection circuit.
D402
1SS355
The protection for the protection circuit from the reverse current.
D403
UDZW5.6 (B)
The detection of over voltage for d5V.
D404
1SS355
The protection for the protection circuit from reverse current.
D405
1SS355
Adjusting voltage of protection detection voltage.
D406
1SS355
The protection for the protection circuit from reverse current.
D407
1SS355
The protection for the microprocessor power supply from reverse
current.
D408
1SS355
The protection for Q403.
D409
UDZW11 (B)
The power supply for FAN circuit.
D410
UDZW6.2 (B)
The power supply for FAN circuit.
D411
UDZW5.6 (B)
The power supply for FAN circuit.
D412
UDZW5.2 (B)
The power supply for FAN circuit.
D413
1SS355
The protection for the microprocessor power supply from reverse
current.
D414
1SS355
The level shifter for Q407.
D415,416
1SS355
The level shifter for fast-off detection circuit.
D418
1SS355
The protect the circuit from static electricity.
D419
UDZW3.3 (B)
The power supply for analog mute and REC mute.
D420,421
1SS355
The protection for the power supply of analog mute and REC mute
from reverse current.
D422
UDZW6.2 (B)
The power supply for IC204
±7.0V
D423,424
1SS355
The protection for the power supply of analog mute and REC mute
from reverse current.
D425
UDZW3.3 (B)
The power supply for analog mute and REC mute.
D426
UDZW3.3 (B)
The control video circuit (X08) on/off.
power on/off.
D427
UDZW8.2 (B)
The power supply for video circuit.
+7.5V
D428
UDZW6.2 (B)
The power supply for IC204
±7.0V
D501
1SS355
The protection for the protection circuit from reverse current.
D502
1SS355
The protection for the OR circuit of analog mute from reverse current.
D701
1SS302-F
The protection for the circuit from static electricity.
D709
1SS302-F
The protection for the circuit from static electricity.
D881
1SS302-F
The detection for video synchronizing signal.
D901
1SS302-F
The detection for video synchronizing signal.
IC111
NJM4565MD-ZB
The buffer ampli
fi
er of IC204 (OP amp)
IC131
NJM4565MD-ZB
The buffer ampli
fi
er of IC204 (OP amp)
CIRCUIT DESCRIPTION
