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Ref. No.
Parts No.
Q222
2SC2240-F (BL)
Q223
2SK879-F (Y,GR)
Q224
2SK879-F (Y,GR)
Q225
2SC4081 (R,S)
Q226
2SC4081 (R,S)
Q227,228
2SC4081 (R,S)
Q229,230
2SC4081 (R,S)
Q301
2SA1576A (R,S)
Q302
2SA1576A (R,S)
Q303
2SC4081 (R,S)
Q304
2SC4081 (R,S)
Q305
2SA1576A (R,S)
Q306
2SC4081 (R,S)
Q307
2SC4081 (R,S)
Q308
2SA1576A (R,S)
Q309
2SC2240-F (BL)
Q310
2SC2240-F (BL)
Q311
2SC2240-F (BL)
Q312
2SC2240-F (BL)
Q313
2SC2240-F (BL)
Q314
DTC113ZUA
Q315
DTC113ZUA
Q316
DTC113ZUA
Q317
DTC113ZUA
Q318
DTC113ZUA
Q319
DTC113ZUA
Q505
2SA1576A (R,S)
Q506
2SD2525-Q
Q507
2SB1640-Q
Q508
2SK879-F (Y,GR)
Q509
2SK879-F (Y,GR)
Q510
2SC4081 (R,S)
Q511
2SA1576A (R,S)
Q512
2SC4081 (R,S)
Q513
2SC4081 (R,S)
Q514
2SC4081 (R,S)
Q515
2SC4081 (R,S)
Q516
2SC4081 (R,S)
Q801
DTC124EUA
KRF-V7300D/V8300D/V9300D
CIRCUIT DESCRIPTION
Description
The current protection.
The constant current for the 1st stage of amp.
The constant current for the 1st stage of amp.
The constant current for the 1st stage of amp.
The constant current for the 1st stage of amp.
+9V power supply.
-9V power supply.
-6dB attenuator.
The mute control.
The protection control.
The protection control.
The protection control.
The protection control.
The protection control.
The protection control.
The current protection.
The current protection.
The current protection.
The current protection.
The current protection.
The headphone relay control.
The front speaker-A relay control.
The front speaker-B relay control.
The center speaker relay control.
The surround speaker relay control.
The surround back speaker relay control.
-B voltage limiter control for the 2nd and 3rd stages amp.
+B voltage control for the 2nd and 3rd stages amp.
-B voltage control for the 2nd and 3rd stages amp.
The constant current circuit.
The constant current circuit.
-B voltage limiter control for the 2nd and 3rd stages amp.
-B constant voltage for the 2nd and 3rd stage amp.
+B constant voltage for the 2nd and 3rd stage amp.
The Darlington connection for Q506.
The Darlington connection for Q507.
The protection works when shorted between AC (+12V) and GND.
The protection works when shorted between AC (-12V) and GND.
The power supply voltage selector (HIGH or LOW tap)
Logic
R-ch
L-ch
R-ch
L-ch
R-ch
SB R-ch
SB L-ch
C-ch
S R-ch
S L-ch
-B power supply selector
Q505
Q515-off: protection-on
Q516-off: protection-on
HIGH: Q801-on
11
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