EN 62
6.
LX7500R
Block & Wiring Diagrams
Block diagram 2 LX7500R, 221104
F1
J1
L1A
EMI FILTER
VDR1
VDR2
L1B
TH1
10
Ω
NTC
3
1
3
1
!
F2
!
!
!
!
!
!
!
!
!
!
!
!
+
+
L3A
EMI FILTER
L3B
Z8
R51
L4A
+ AMP
– AMP
-
+
+
+
+
T1
T4
L12
A
B
A
B
C
D
E
L11
Q1
Q2
ϕ
ϕ
-
!
!
T2
C
D
H
G
F
E
-
A
B
D14
D10
D20
C9
C7
+
C1
+
C27
J1
1
10
NC
+ AMP
NTC
+ 12V
+ 12V
+ 12V
+ 12V
+ 5V
+ AMP
OVER-VOLTAGE
DETECTION
VOLTAGE SENSE
PRIMARY CURRENT LIMITATION
+ 12V
+12V
6
5
4 Deadtime
Control
Oscillator
0.12V
0.7V
0.7mA
+
-
-
+
-
+
+
-
D
Q
Ck
-
+
+
-
3.5V
4.9V
13
Reference
Regulator
Q2
Q1
8
9
11
10
12
VCC
16
15
3
2
1
1
2
14
7
Feedback
PWM
Ref. Output
Ref1
Gnd
UV
Lockout
Flip-
Flop
Output Control
Error Amp 1
Error Amp 2
Deadtime
Comparator
PWM
Comparator
Q
TL494CN
U1
+ 5V
+ 33V
-5V
-28V
Ref2
Ref2
Ref1
Q15
C26
SNUBBER
NETWORK
R38/
R74
R75/
R100
R34/
R67
CURRENT
SENSE
LOW VOLTAGE
DETECTION
D17
Q9
TEMP.
HEATSINK H3
J3
J4
1
13
-28V
IP_FAIL
+33V
+12V
AMP_ON
-5V
IDE_OFF
+5V
+12V0
+5V0
SWITCHED MODE POWER SUPPLY
-
-
-
ϕ
ϕ
Internal
Bias
Vref
Good
Logic
OSC
5-V REF
Error
Amplifier
PWM
Latch
Current-
Sense
Comparator
34V nom
TL3842
U2
V
CC
GND
RT/CT
VFB
COMP
ISENSE
7
5
4
2
1
3
8
10
REF
OUT
+
–
UVLO
EN
2R
R
V1
S
R
T
†
+
–
L4B
L4D
+ 5V
+ 5V
-
-
U3
reference
regulation
PC1-A
PC1-B
PRIMARY
D7
+
+
+
C16
C38
D2
D8
C41
D36
1
2
3
POWER
FAIL
DET.
1
4
AUXILIARY SUPPLY BOARD
1301
1
13
1300
1
13
1305
1
12
AMP_ON
IDE_OFF
+5V_STBY
7301
7310
7302
7308
7300
7303
7305
7322
7306
7309
+12V_DIGI
-28V
+33V_STBY
+12V
-5V_STBY
+5V_STBY
1307
F1.0A
!
IP_FAIL
IP_FAIL_AV
IP_FAIL_COMBI
1304
1
6
IP_FAIL_COMBI
INV_ON
AMP_ON
POWER_ON
STANDBY
1303
1
12
+3V3_DIGI
+12V_DIGI
+12V_STBY
+3V3_AV
+5V_AV
-5V_AV
+5V_A
+5V_COMBI
+12V_A
-5V_A
-5V_STBY
+5V_STBY
+33V_STBY
+5V_STBY
-5V_STBY
-28V
+5V_DIGI
INV_ON
-5V_DIGI
IP_FAIL_AV
INV_ON
+3V3_COMBI
STANDBY
+12V
+12V
+12V_STBY
+12V_DIGI
INV_ON
+12V_A
+12V_A
+33V_STBY
+3V3
+3V3_COMBI
+12V_DIGI
+3V3_DIGI
+3V3_AV
DC/DC
CONVERTER
+5V_STBY
+5V_STBY
+5V_A
+12V_A
+5V_AV
+5V_DIGI
+12V_DIGI
+5V_COMBI
-5V_STBY
-5V_STBY
-5V_A
+12V_A
-5V_AV
-5V_DIGI
+12V_DIGI
1306
F2A
!
1302
7100
1
10
1306
9
1
1331
1
10
ERROR
FREQU_HOP
NTC_AMP
AMP_LEFT
SUR_ON
L/R ON
AMP_CENTRE
CLOCK
FRONT SPEAKERS
CENTRE S SUBWOOFER
SURROUND SPEAKERS
AMP_RIGHT
CSUB_ON
AMP_SR
AMP_SUB
NC
NC
NC
AMP_SL
CLOCK
CLOCK
CLOCK
CLOCK
GENERATOR
NTC
TEMPERATURE
HEATSINK
Front Left
Front Left
Front Right
Front Right
Subwoofer
Subwoofer
Centre
Centre
Surround Right
Surround Left
Surround Right
Surround Left
+
-
-
+
MODE
PWM
MODULATOR
PWM
MODULATOR
OSCILLATOR
ON / OFF
9
16
21
8
6
7
5
4
TDA8920/TDA8924
7200
+
-
-
+
MODE
PWM
MODULATOR
PWM
MODULATOR
OSCILLATOR
ON / OFF
9
16
21
8
6
7
5
4
TDA8920/TDA8924
7300
+
-
-
+
MODE
PWM
MODULATOR
PWM
MODULATOR
OSCILLATOR
ON / OFF
9
16
21
8
6
7
5
4
TDA8920/TDA8924
AMPLIFIER BOARD
LS SOCKET BOARD 2
LS SOCKET BOARD 1
1309
1
10
Vdd
Vss
NC
1308
8
1
1307
ERROR
to 1302/9
8
1
1925
9
1
1935
8
1
1936
8
1
DC
DETECTION
BE_FAN
RESETN_BE
BE_LOADN
S2B
FRONT-END I2S
DVD & RW ENGINE
TRAY CONTROL
SERVO
READ
WRITE
DISC
7
DATA
&
CONTROL
LASER
1600
1102
1500
+5V
+12V
5
DIGITAL BOARD
for details see
separate block diagram
1203
8020
from sheet 1
IEEE1394
from sheet 1
1018 COMBI board
from sheet 1
1300 COMBI board
from sheet 1
1020 COMBI board
from sheet 1, 1900 A/V board
from sheet 1
1934 A/V board
from sheet 1
1810 COMBI board
from sheet 1, 1986 uP sub- board
from sheet 1, 1947 A/V board
from sheet 1, 1946 A/V board
to 1900 Dig. board
to 1104 Dig. board
to 1904 Dig. board
to 1704 Dig. board
IN
OUT
+3V3
+12V
+33V_STBY
+12V
+12V_DIGI
+12V_DIGI
INV_ON
+5V_STBY
+5V_AV
+5V_DIGI
-5V_STBY
-5V_AV
-5V_DIGI
+12V
+12V_A
+12V_A
+5V_STBY
+5V_A
+5V_COMBI
-5V_STBY
-5V_A
+3V3
+3V3_AV
+3V3_DIGI
POWER_ON
+3V3
+3V3_COMBI
BLOCK DIAGRAM 2