Power Amplifier - Panasonic SA-AKX10PH Service Manual

15.3. Power Amplifier

: AUDIO OUTPUT SIGNAL LINE
MAIN P.C.B.
FROM/TO
SERVO/SYSTEM CONTROL
D-AMP P.C.B.
CN2711 CN5902 FR IN
3 10
FROM AUDIO
CN2711 CN5902 FL IN
1 12
Q5902,Q5903,Q5905
CN2711 CN5902 MOD DA
10 3 MUTING
CIRCUIT
CN2711 CN5902 MUTE F
5 8
5V
QR5900,QR5901 Q5901
CN2711 CN5902
FHOP1
SWITCH SWITCH
6 7
5V
CN2711 CN5902
DC DET
9 4
IC5900
C1BA00000497
30V
POWER AMPLIFIER
4 20
STABI
-30V 12 STABI
DRIVER
HIGH
SWITCH1
CONTROL
IN1+ INPUT PWM
2 &
STAGE MODULATOR
RELEASE1
HANDSHAKE
DRIVER
LOW
MUTE
ENABLE1
TEMP. SENSOR
OSC
1 OSCILLATOR MANAGER CURRENT PROTECTION
VOLT. PROTECTION
ENABLE2
MODE
23 MODE
TH5900
DRIVER
HIGH
SWITCH2
CONTROL
INPUT PWM
IN2-
21 &
STAGE MODULATOR RELEASE2
HANDSHAKE
DRIVER
LOW
MUTE
6 18 17
-30V
75
30V -30V
8 11
BOOT1
9
OUT1 JK5901
+
10
1 FRONT (RIGHT)
JK5901
-
2
PROT
7 -30V
BOOT2
15
JK5901
OUT2
14 +
3
FRONT (LEFT)
JK5901
-
4
13 16
-30V 30V
DC DETECT
Q5906,Q5907
SA-AKX10PH/PN POWER AMPLIFIER BLOCK DIAGRAM