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KRF-V7300D/V8300D/V9300D
● Semiconductor Working Description (X08-3502-70)
Ref. No.
Parts No.
D207,208
1SS402-F
D301
1SS302-F
D311
1SS302-F
D391
UDZW4.7 (B)
D392,393
UDZW18 (B)
D401
UDZW3.9 (B)
D402
1SS355
D403
UDZW5.6 (B)
D404
1SS355
D405
1SS355
D406
1SS355
D407
1SS355
D408
1SS355
D409
UDZW11 (B)
D410
UDZW6.2 (B)
D411
UDZW5.6 (B)
D412
UDZW5.2 (B)
D413
1SS355
D414
1SS355
D415,416
1SS355
D418
1SS355
D419
UDZW3.3 (B)
D420,421
1SS355
D422
UDZW6.2 (B)
D423,424
1SS355
D425
UDZW3.3 (B)
D426
UDZW3.3 (B)
D427
UDZW8.2 (B)
D428
UDZW6.2 (B)
D501
1SS355
D502
1SS355
D701
1SS302-F
D709
1SS302-F
D881
1SS302-F
D901
1SS302-F
IC111
NJM4565MD-ZB
IC131
NJM4565MD-ZB
6
CIRCUIT DESCRIPTION
Description
The protection for the input of IC204 from static electricity.
The protection for the circuit from static electricity.
The protection for the circuit from static electricity.
The power supply for the MIC circuit.
The protection for the input of IC204 from static electricity.
The power supply for the protection circuit.
The protection for the protection circuit from the reverse current.
The detection of over voltage for digital +5V.
The protection for the protection circuit from reverse current.
Adjusting voltage of protection detection voltage.
The protection for the protection circuit from reverse current.
The protection for the microprocessor power supply from reverse
current.
The protection for Q403.
The power supply for FAN circuit.
The power supply for FAN circuit.
The power supply for FAN circuit.
The power supply for FAN circuit.
The protection for the microprocessor power supply from reverse
current.
The level shifter for Q407.
The level shifter for fast-off detection circuit.
The protect the circuit from static electricity.
The power supply for analog mute and REC mute.
The protection for the power supply of analog mute and REC mute
from reverse current.
The power supply for IC204
The protection for the power supply of analog mute and REC mute
from reverse current.
The power supply for analog mute and REC mute.
The control video circuit (X08) on/off.
The power supply for video circuit.
The power supply for IC204
The protection for the protection circuit from reverse current.
The protection for the OR circuit of analog mute from reverse current.
The protection for the circuit from static electricity.
The protection for the circuit from static electricity.
The detection for video synchronizing signal.
The detection for video synchronizing signal.
The buffer amplifi er of IC204 (OP amp)
The buffer amplifi er of IC204 (OP amp)
Logic
±7.0V
power on/off.
+7.5V
±7.0V
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