P400 hi-fi high end audio power amplifier

 
 
 
P400 caracteristic
 
Sinus power:
382W (per chanal 8W load impedance)
Load impedance:
2-16W
Frequency ranges:
5-100000Hz
Frequency range:
10-40000Hz (-1dB)
Damping factor:
>150
Input impedance:
60KW
Power supply:
± 68V DC
Power consumption:
10-450W
Protection characteristic
 
Impendance: 2 x 47KW
DC time detection: 200ms
DC detection: 1V
Wait interval: 5s
Power supply: 24V DC

Schematic diagram of amplifier

Layout of main board

Schematic diagram of speaker protection and anticlick circuit

Layout of protection

Suitable power source for amplifier


 
 

Components
 

P400 MAIN BOARD
 
RESISTORS
0   4 R10, R11, R14, R15  
0.39 4W 4 R33, R34, R39, R40  
4.7 1/4W 3 R31, R32, RPP2  
10 1/4W 2 R41, R42  
100 (10K )* 1/4W 3 R2, R4, R5  
130 1/4W 2 R27, R29  
150 1/4W 3 R18, R24, R26  
220 1/4W 3 R28, R30, RPP1  
270 1/4W 4 R35, R36, R37, R38  
330 1/4W 2 R19, R25  
1K 1/8W 1 R22  
1K 1/8W 2 R3, R21  
1K5 1/8W 4 R8, R9, R16, R17  
2K2 1/8W 1 R20  
5K6 1/8W 1 R23  
10K 1/8W 1 R1  
33K 1/8W 2 R12, R13  
100K 1/8W 2 R6, R7  
CAPACITORS
-   2 C7, C8  
15p 160V 1 C6  
50p 160V 2 C2, C3  
200p 160V 2 C13, C14  
.04u 160V 1 C4  
0.1u 160V 1 C9  
1u 16V 1 C1  
100u 35V 1 C5  
COILS
2.2uH   1 L  
SEMICONDUCTORS
BA157   2 D1, D2  
2N5401 TO-39 3 Q3, Q4, Q5  
2N5550 TO-39 3 Q1, Q2, Q7  
BC546 TO-39 2 Q6, Q8  
BC556 TO-39 1 Q9  
TIP41C TO-220 1 Q10  
TIP42C TO-220 1 Q11  
MJ15003 TO-3 2 Q13  
MJ15004 TO-3 2 Q15  


SPEAKER PROTECTION
 
RESISTORS
-   1 R10  
-   1 RSTAB  
470   1 R8  
1k   2 R4,R9  
2k2   1 RLED  
8k2   1 R7  
10k   1 R3  
15k   1 R6  
100k   2 R1,R2  
1M2   1 R5  
CAPACITORS
10u   2 C3,C4  
220u   2 C1,C2  
SEMICONDUCTORS
BA157   4 D1,D2,D3,D4  
BC183 TO-39 4 T1,T2,T4,T5  
BC212 TO-39 1 T3  
24v TO-220 1 STAB