Audio Digital Amp - Panasonic SA-PT750PL Service Manual

SA-PT750PL

18.6. Audio Digital Amp

IC5000
:MAIN SIGNAL LINE
C1BA00000487
AUDIO DIGITAL POWER AMP
IN1M
3
FROM DVD (VIDEO/AUDIO)
INPUT
IN1P STAGE
CN2009 CN5050 FRONT R
2
3 15
MUTE
SGND1
5
OSC
1
OSCILLATOR
MODE
MODE
23
SGND2
19
MUTE
FRONT L IN2P
CN2009 CN5050
22
1 17
INPUT
STAGE
IN2M
21
FROM SYSTEM CONTROL Q5601,Q5602
Q5603,Q5604
CN2009 CN5050 MUTE C S
12 6
MODE 1
MUTING
CN2009 CN5050 MUTE F SW
MODE 2
CIRCUIT
13 5
CN2009 CN5050 MOD DA
17 1
FROM DVD (VIDEO/AUDIO)
CN2009 CN5050 CENTER
11 7
CN2009 CN5050 SUBWOOFER
5 13
FROM SYSTEM CONTROL
FHOP
CN2009 CN5050
14 4
TO SYSTEM CONTROL
CN2009 CN5050 DC DET
16 2
+ 30V SENSE
- 30V SENSE
12 7 16 8
BOOT1
9
RELEASE1
DRIVER
PWM
HIGH
MODULATOR SWITCH1
CONTROL
OUT1
AND
10
ENABLE1
HANDSHAKE
DRIVER
LOW
STABI
TEMPERATURE SENSOR
MANAGER
CURRENT PROTECTION
VOLTAGE PROTECTION
BOOT2
15
ENABLE2
DRIVER
HIGH
CONTROL
OUT2
SWITCH2 AND
14
HANDSHAKE
PWM
DRIVER
RELEASE2
MODULATOR
LOW
11 13
- 30V SENSE
IC5500
C0JBAB000902
INVERTER GATE (CLOCK GENERATOR)
IC5501
C0JBAF000716
D-TYPE FLIP-FLOP
1 2 3 4 11 10 9 8 3 CP1
5 D1
X5500
CD1
5 6
4
X5501
- 30V SENSE
IC5200
C1BA00000487
AUDIO DIGITAL POWER AMP
FR +
IN1M
3
INPUT PWM
STAGE MODULATOR
CENTER IN1P
2
MUTE
SGND1
5
OSC
1
OSCILLATOR
MANAGER
MODE
MODE 1
23 MODE
FL +
SGND2
19
MUTE
IN2P
22
INPUT PWM
STAGE MODULATOR
IN2M
21
- 30V SENSE
IC5300
C1BA00000487
AUDIO DIGITAL POWER AMP
IN1M
3
INPUT PWM
SUBWOOFER
STAGE MODULATOR
IN1P
2
MUTE
SGND1
5
OSC
1
OSCILLATOR
MANAGER
MODE 2 MODE
23 MODE
SGND2
19
MUTE
IN2P
22
INPUT PWM
STAGE MODULATOR
IN2M
21
Q1 1
Q1 2
SD1
6
90
+ 30V SENSE
12 7 16 8
BOOT1
9
RELEASE1
DRIVER
HIGH
SWITCH1
CONTROL
OUT1
AND
10
ENABLE1
HANDSHAKE
DRIVER
LOW
STABI
TEMPERATURE SENSOR
CURRENT PROTECTION
VOLTAGE PROTECTION
BOOT2
15
ENABLE2
DRIVER
HIGH
CONTROL
SWITCH2 OUT2
AND
14
HANDSHAKE
DRIVER
RELEASE2
LOW
C +
C -
13
11
- 30V SENSE
SW +
+ 30V SENSE
SW -
12 7 16 8
BOOT1
9
RELEASE1
DRIVER
HIGH
SWITCH1
CONTROL
OUT1
AND
10
ENABLE1
HANDSHAKE
DRIVER
LOW
STABI
TEMPERATURE SENSOR
CURRENT PROTECTION
VOLTAGE PROTECTION
BOOT2
15
ENABLE2 DRIVER
HIGH
CONTROL
SWITCH2 OUT2
AND
14
HANDSHAKE
DRIVER
RELEASE2
LOW
11 13
- 30V SENSE
Q5101,
Q5102
Q5640,
Q5642,
Q5644
FAN DC
SA-PT750PL AUDIO DIGITAL AMP BLOCK DIAGRAM
SPEAKERS
FRONT L
FL + JK5001
+
7
JK5001
-
8
FRONT R
FR + JK5001
+
5
JK5001
-
6
CENTER
JK5001
+
3
JK5001
-
4
SUBWOOFER
JK5001
+
1
JK5001
-
2
DC DETECT
FAN
Q5641
FAN LOCK FAN LOCK CN5501
DETECT 3
FAN DC OUT CN5501
1
FAN MOTOR
M
DRIVE
FAN GND CN5501
2