Audio Digital Amp - Panasonic SA-PT750PC Service Manual

SA-PT750P / SA-PT750PC

18.6. Audio Digital Amp

IC5000
:MAIN SIGNAL LINE
C1BA00000487
AUDIO DIGITAL POWER AMP
IN1M
3
FROM DVD (VIDEO/AUDIO)
INPUT
STAGE
FRONT R IN1P
CN2009 CN5050
2
3 15
MUTE
SGND1
5
OSC
1
OSCILLATOR
MODE
MODE
23
SGND2
19
MUTE
FRONT L
CN2009 CN5050 IN2P
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
FHOP
CN2009 CN5050
14 4
TO SYSTEM CONTROL
DC DET
CN2009 CN5050
16 2
+ 30V SENSE
- 30V SENSE
12 7 16 8
BOOT1
9
RELEASE1
DRIVER
PWM
HIGH
SWITCH1
MODULATOR
CONTROL
OUT1
AND
10
ENABLE1
HANDSHAKE
DRIVER
LOW
STABI
TEMPERATURE SENSOR
MANAGER
CURRENT PROTECTION
VOLTAGE PROTECTION
BOOT2
15
ENABLE2 DRIVER
HIGH
CONTROL
SWITCH2 OUT2
AND
14
HANDSHAKE
PWM
DRIVER
RELEASE2
MODULATOR
LOW
13
11
- 30V SENSE
IC5500
C0JBAB000902
INVERTER GATE (CLOCK GENERATOR)
IC5501
C0JBA000716
D-TYPE FLIP-FLOP
1 2 3 4 11 10 9 8 3 CP1
5 D1
X5500
CD1 SD1
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
STABI
OSC
1
OSCILLATOR
MANAGER
MODE
MODE 1
MODE
23
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
MODULATOR
IN1P STAGE
2
MUTE
SGND1
5
STABI
OSC
1
OSCILLATOR MANAGER
MODE 2 MODE
23 MODE
SGND2
19
MUTE
IN2P
22
INPUT PWM
STAGE MODULATOR
IN2M
21
Q1 1
Q1 2
6
96
+ 30V SENSE
FL +
12 7 16 8
BOOT1
9
RELEASE1
DRIVER
HIGH FR +
SWITCH1
CONTROL
OUT1
AND
10
ENABLE1
HANDSHAKE
DRIVER
LOW
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
TEMPERATURE SENSOR
CURRENT PROTECTION
VOLTAGE PROTECTION
BOOT2
15
ENABLE2
DRIVER
HIGH
CONTROL
OUT2
SWITCH2 AND
14
HANDSHAKE
DRIVER
RELEASE2
LOW
11 13
- 30V SENSE
Q5101,
Q5102
DC DETECT
Q5641
Q5640,
Q5642,
Q5644
FAN MOTOR
FAN DC
DRIVE
SA-PT750P/PC AUDIO DIGITAL AMP BLOCK DIAGRAM
SPEAKERS
FRONT L
JK5001
+
7
JK5001
-
8
FRONT R
JK5001
+
5
JK5001
-
6
CENTER
JK5001
+
3
JK5001
-
4
SUBWOOFER
JK5001
+
1
JK5001
-
2
FAN
FAN LOCK FAN LOCK CN5501
DETECT 3
FAN DC OUT CN5501
1
M
FAN GND CN5501
2