10
KRF-V7300D/V8300D/V9300D
Ref. No.
Parts No.
Description
Logic
D524
1SS355
P12V tap of the power transformer.
D525
1SS355
Protect -12V tap of the power transformer.
D526,527
1SS355
The detection of short circuit 12V taps.
D801
TS6P03G-B
The low voltage taps recti
fi
er.
D802
TS6P03G-B
The high voltage taps recti
fi
er.
D803,804
1SR139-400T64
The diode for the tap selector relay.
D805
1SS355
Protect the relay from reverse current.
IC1
STK433-330-E
3-ch power pack IC.
C-ch, S R-ch and SB R-ch
IC2
STK433-130-E
2-ch power pack IC.
S L-ch and SB L-ch
IC3
KIA7812API-UP
+12V regulator IC for analog circuit.
IC4
KIA7912API-UP
-12V regulator IC for analog circuit
Q1
DTC643TU
-6dB attenuator.
L-ch
Q2
DTC643TU
-6dB attenuator.
R-ch
Q3
2SC2878 (B) -F
For muting
L-ch
Q4
2SC2878 (B) -F
For muting
R-ch
Q5
DTC643TU
For muting
S L-ch
Q6
DTC643TU
For muting
S R-ch
Q7
DTC643TU
For muting
SB L-ch
Q8
DTC643TU
For muting
SB R-ch
Q101
DTC643TU
For muting
C-ch
Q201
2SK364F (GR,BL)
The 1st stage differential amp.
L-ch
Q202
2SK364F (GR,BL)
The 1st stage differential amp.
R-ch
Q203
2SC4081 (R,S)
The constant current for the 1st stage of amp.
L-ch
Q204
2SK364F(GR,BL)
The 1st stage differential amp.
R-ch
Q205
2SK364F(GR,BL)
The 1st stage differential amp.
L-ch
Q206
2SC4081 (R,S)
The constant current for the 1st stage of amp.
R-ch
Q207
IMX8
The 2nd stage amp.
L-ch
Q208
IMX8
The 2nd stage amp.
R-ch
Q209
2SA970-F (BL)
The 3rd stage amp.
L-ch
Q210
2SA970-F (BL)
The 3rd stage amp.
R-ch
Q211
2SA970-F (BL)
The current mirror.
L-ch
Q212
2SA970-F (BL)
The current mirror.
R-ch
Q213
2SA970-F (BL)
The current mirror.
L-ch
Q214
2SA970-F (BL)
The current mirror.
R-ch
Q215
2SA970-F (BL)
The 3rd stage amp.
L-ch
Q216
2SA970-F (BL)
The 3rd stage amp.
R-ch
Q217
TRAIT10N
The power transistor.
L-ch
Q218
TRAIT10N
The power transistor.
R-ch
Q219
TRAI1T10P
The power transistor.
L-ch
Q220
TRAIT10P
The power transistor.
R-ch
Q221
2SC2240-F (BL)
The current protection.
L-ch
CIRCUIT DESCRIPTION
