4.2. Power AMP
No sound is output.
The protector operates.
Is the power transistor open or short-
circuited?
2SB1647/2SD2560
Is the emitter resistance of the power
transistor open?
0.47Ω
Is the base resistance of the power
transistor open?
22Ω
Is the trimmer potentiometer between the
base of the power transistor open?
1kΩ
Is other transistor trouble?
Is other resistance trouble?
Turn on the power, check that voltage of the section is normal and that idling electric current is
flowing.
Replace the power transistor.
Replace the transistor.
Replace the resistance.
Replace the emitter resistance.
Replace the base resistance.
Replace the trimmer potentiometers.
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
YES
103
Содержание IN-Command AVR-X4000
Страница 8: ...Personal notes 8...
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Страница 170: ...R5F3650KNFB DIGITAL IC231 170...
Страница 176: ...W9864G6JH 6 DIGITAL IC409 W9864G2IH Publication Release Date Aug 28 2009 4 Revision A03 4 PIN CONFIGURATION 176...
Страница 179: ...MX25L1606EM2I 12G DIGITAL IC410 IC423 MX25L1606EM2I 12G Block Diagram 8 PIN SOP 200mil 150mil BLOCK DIAGRAM 179...
Страница 181: ...AK5358BET DIGITAL IC451 AK5358BET Pin Function 181...
Страница 194: ...2 FL DISPLAY FLD 17 BT 40GINK FRONT FL601 PIN CONNECTION GRID ASSIGNMENT Y2 q 194...
Страница 195: ...ANODE CONNECTION 195...