Audio Digital Amp - Panasonic SA-PT250GCP Service Manual

SA-PT250GCP

17.6. Audio Digital Amp

IC5000
:MAIN SIGNAL LINE
C1BA00000487
AUDIO DIGITAL POWER AMP
IN1M
3
FROM AUDIO
INPUT
IN1P STAGE
CN2009 CN5050 FRONT R
2
3 15
MUTE
SGND1
5
OSC
1
MODE
23 MODE
SGND2
19
MUTE
CN2009 CN5050 FRONT L IN2P
22
1 17
INPUT
STAGE
IN2M
21
Q2504,Q2505
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
IC5400
C1BA00000487
AUDIO DIGITAL POWER AMP
IN1M
3
FROM AUDIO
INPUT
SURROUND R STAGE
CN2009 CN5050 IN1P
2
9 9
MUTE
SGND1
5
OSC
1
MODE
MODE
23
SGND2
19
MUTE
SURROUND L IN2P
CN2009 CN5050
22
7 11
INPUT
STAGE
IN2M
21
CN2009 CN5050 CENTER
11 7
CN2009 CN5050 SUBWOOFER
5 13
TO SYSTEM CONTROL
CN2009 CN5050 DC DET
16 2
+ 30V SENSE
- 30V SENSE
12 7 16 8
RELEASE1
DRIVER
PWM
HIGH
MODULATOR SWITCH1
CONTROL
AND
ENABLE1
HANDSHAKE
DRIVER
LOW
STABI
TEMPERATURE SENSOR
OSCILLATOR MANAGER
CURRENT PROTECTION
VOLTAGE PROTECTION
ENABLE2
DRIVER
HIGH
CONTROL
SWITCH2 AND
HANDSHAKE
PWM
DRIVER
RELEASE2
MODULATOR
LOW
11 13
- 30V SENSE
+ 30V SENSE
- 30V SENSE
12 7 16 8
RELEASE1
DRIVER
PWM
HIGH
SWITCH1
MODULATOR
CONTROL
AND
ENABLE1
HANDSHAKE
DRIVER
LOW
STABI
TEMPERATURE SENSOR
OSCILLATOR
MANAGER
CURRENT PROTECTION
VOLTAGE PROTECTION
ENABLE2 DRIVER
HIGH
CONTROL
SWITCH2
AND
HANDSHAKE
PWM
DRIVER
RELEASE2
MODULATOR
LOW
11 13
- 30V SENSE
IC5500
C0JBAB000902
INVERTER GATE
(CLOCK GENERATOR)
5 6 11 10 9 8
X5500
BOOT1
9
FR +
OUT1
10
BOOT2
15
FL +
OUT2
14
IC5300
C1BA00000487
BOOT1 AUDIO DIGITAL POWER AMP
9
SR +
OUT1
IN1M
10
3
PWM
INPUT
SUBWOOFER
STAGE MODULATOR
IN1P
2
MUTE
SGND1
5
OSC
1
BOOT2
15
OSCILLATOR
MANAGER
MODE 2 MODE
23 MODE
SL +
SGND2
OUT2
14 19
MUTE
IN2P
22
INPUT PWM
CENTER
STAGE MODULATOR
IN2M
21
IC5501
C0JBAF000716
D-TYPE FLIP-FLOP
3 CP1 Q1 1
5 D1 Q1 2
SD1
CD1
4 6
72
C +
C -
SW +
+ 30V SENSE
- 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
13
11
- 30V SENSE
Q5101,
Q5102
FAN DC
SA-PT250GCP AUDIO DIGITAL AMP BLOCK DIAGRAM
SPEAKERS
FRONT L
FL + JK5001
+
7
JK5001
-
8
FRONT R
FR + JK5001
+
5
JK5001
-
6
SURROUND L
SL +
JK5001
+
11
JK5001
-
12
SURROUND R
SR +
JK5001
+
9
JK5001
-
10
CENTER
JK5001
+
3
JK5001
-
4
SUBWOOFER
JK5001
+
1
JK5001
-
2
DC DETECT
FAN
Q5641
FAN LOCK CN5501
FAN LOCK
DETECT 3
Q5640,
Q5642,
Q5644
FAN DC OUT CN5501
1
FAN MOTOR
M
DRIVE
FAN GND CN5501
2