Kenwood KRF-V7300D Service Manual page 10

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