EN 80
7.
LX7500R
Circuit Diagrams and PWB Layouts
VOLUME I
RIGHT
SUR.
SOURCE
SUPPLY
POWER
SELECTOR
TREBLE
LEFT
VOLUME II
LOGIC
LEFT
REC
IIC BUS
BASS ALC
BASS
LEFT
VOLUME I
LEFT
SUR.
TREBLE
RIGHT
VOLUME II
RIGHT
BASS
RIGHT
INHIB
IN
OUT
ADJ
GND
AUDIO PROCESSING 2
F313 F13
F314 F13
F315 G13
F316 G6
F317 G13
F318 H13
F319 H13
F320 H6
F321 H3
F322 I13
F323 E6
F324 I13
F325 I13
6303 H11
7300 B10
7301 C10
7302 C14
7303 B4
7304-1 D10
7304-2 D13
7306 E8
7307 E9
7308 F2
7309 H2
7310 H11
7311 I10
F310 F4
F311 F6
F312 F13
3443 H2
3444 H6
3445 H2
3446 I12
3447 F5
3448 F6
3449 H10
provision, backup for DSP bass management
3450 I9
3451 H11
3452 F11
3453 G10
3454 H10
3455 H11
4300 C12
4301 D12
4302 D7
4303 G6
4304 I13
4305 I13
6300 C11
6301 H3
6302 H11
3421 E10
3422 E11
3423 E13
3424 E2
3425 E8
3426 E7
3427 E7
1302
3428 E10
3429 E12
3430 E8
3431 E8
3432 F8
3433 F5
3434 G3
3435 G4
3436 G3
3437 G5
3438 G13
3439 G13
3440 H2
3441 H13
3442 H5
3411 C8
3412 C11
3413 D2
3414 D8
3415 D9
3416 D12
3417 D13
1331
3418 D9
3419 D14
3420 D2
2450 I2
2451 F6
2452 I10
2453 A4
3400 A2
3401 B2
3402 B7
3403 B9
3404 B8
3405 B2
3406 B11
3407 C10
3408 C13
3409 C8
3410 C11
2434 D12
2435 E4
2436 E7
2437 E2
2438 E10
2439 E13
2440 F6
provision, backup for DSP bass management
to Amplifier
1924
to Front board
2441 F6
2442 G3
2443 G1
2444 G6
2445 G6
2446 H6
2447 H1
2448 I3
2449 I3
I
A
B
C
D
E
F
2412 C8
2413 C4
2414 C8
2415 C8
2416 D1
2417 D9
2418 D10
2419 D8
2420 D2
2421 D4
2422 D11
2423 D11
2424 D6
2425 D14
2426 D7
2427 D7
2428 D7
2429 D9
2430 D10
2431 D9
2432 D9
2433 D12
1
1
2
2
3
4
5
6
7
8
9
10
11
12
13
14
A
B
C
D
E
F
G
H
COMBI BOARD
3
4
5
6
7
8
9
10
11
12
13
14
to Amplifier
G
H
I
1018 H14
1300 F14
1301 G13
1302 I14
2400 A4
2401 B2
2402 B3
2403 B6
2404 B8
2405 B4
2406 B9
2407 B1
2408 B3
2409 B3
2410 B11
2411 C2
provision, backup for DSP bass management
2434
100p
SUBWOOFER & CENTER SPEAKERS
2438
10n
D
7304-2
LM833D
5
6
7
8
4
GND_A
GND_ACS
GND_ACS
3436
180K
GND_ACS
GND_ACS
4n7
2403
GND_ACS
D
4K7
3405
6300
BC857BW
7301
BAS316
3425
4K7
F312
2447
2n2
470R
3400
2448
47u
16V
2401
470p
1K0
3411
SCN
3403
2K2
GND_ACS
D
D
10K
3446
22n
1K0
2409
GND_ACS
3402
4301
4
5
6
2424
4n7
1302
06FE-ST-VK-N
1
2
3
D
GND_ACS
GND_A
7311
BC847BW
2427
SCN
BC847BW
470n
7307
2453
470n 50V
2425
47u
16V
BC857BW
7306
1K0
3408
BC817-25
7302
10K
3449
20
1
GND_ACS
25
5
24
6
23
8
21
2
7
22
12
17
14
15
9
7303
TDA7468
16
10
19
11
18
27
13
28
3
26
4
F317
3415
33K
GND_ACS
GND_A
470n
2416
2421
470n
3407
1K0
F323
16V
100u
2446
2442
47u
16V
3438
10K
F316
3433
10R
22R
3437
3444
8K2
3442
4K7
3K3
2436
3426
470n
2417
2u2
50V
F310
4303
GND_ACS
2
3
4
5
6
7
8
9
4302
1300
FE-ST-VK-NA
1
10
2449
22n
F324
3413
4K7
GND_ALR
330n
2420
GND_A
7309
BC847B
3414
100R
100R
3404
6
2
3
8
5
1
7308
LM2931D-R
4
7
GND_ACS
120n
2418
F320
3451
1K5
3416
F311
F315
10K
3406
10K
1n0
F319
2419
1n0
2404
10K
3430
GND_A
220n
2423
3428
100K
2408
47u
16V
10K
3432
4305
2412
470n
47p
2415
2414
47p
4K7
3447
470n
2402
GND_ACS
3417
100R
2426
470n
7
8
GND_A
SCN
1018
08FE-ST-VK-N
1
2
3
4
5
6
GND_A
3453
8K2
GND_ACS
3434
27K
3443
47R
2K2
3423
2407
470n
F322
GND_ACS
F321
2K2
3419
SCN
2431
18n
3
2
1
8
4
2441
220u
25V
LM833D
7304-1
3435
1K0
2443
100n
GND_ACS
2428
56n
3410
15K
GND_A
3409
1K0
GND_ALR
16V 47u
2406
100p
2430
2400
470n
2410
4u7
50V
3
4
5
6
7
8
9
FE-ST-VK-NA
1301
1
10
2
6301
3452
1K5
BAS316
2422
220n
2411
330n
F313
2450
100u
16V
3455
10K
3431
10K
2405
47u 16V
2M2
GND_ACS
3418
10K
3401
GND_ACS
470R
3420
2451
100u
10V
GND_ACS
10u
2452
220K
3450
16V
GND_ACS
3445
220R
GND_ALR
GND_AS
SCN
4304
10K
3412
D
GND_ACS
GND_ACS
3454
10K
8K2
3448
3441 10K
SCN
2429
100p
10K
3439
F314
GND_ACS
470n
2435
SCN
GND_ACS
3422
22K
2432
15n
470p
2437
3440
470R
GND_HP
2440
22n
F318
2413
1n0
3427
5K6
4300
BC847BW
7310
10n
2439
10K
3429
7300
BC817-25
GND_ACS
GND_ACS
2444
BAS316
6303
22n
6302
BAS316
16V
100u
2445
3424
10K
F325
100p
2433
3421
2K2
GND_A
AMP_SR
AMP_SL
HP_DET
SurON
5VSTBY
5VSTBY
5VSTBY
GND_ACS
HPREF
9V_TUNER
+9V2
HP_RIGHT
HP_LEFT
IPFAIL
MUTE AMPLIFIERS
+5V
LR_CSub_on
AMP_SUB
9V_TUNER
SUB_REF
+SUB
+SUB
AMP_ERR
AMP_LEFT
AMP_RIGHT
AMP_CENTRE
from 2406
from 2425
Freq_HOP
+5V
NTC_Amp
PDN_MUTE
AMP_SUB
XMUTE_ALL
+5V_A
HighpassOFF
+12V_A
+9V2
+12V_A
+HP
+12V_A
+12V_A
SUB_REF
9V_TUNER
+SUB
AMP_CENTRE
to 1300
to 1301
AF_I2C_SCL2
AF_I2C_SDA
DAC_Center
DAC_SUB
5VSTBY
MuteCentre
SEL_L
SEL_R
Combi board LX7500R, 181004
# for provision only
MUTE
MUTE
#
EVM
V
DC voltages measured in Stop mode
with no audio output.
...V
4,6V
4,6V
4,6V
4,6V
4,6V
4,6V
0V
0,7V
5V
5V
4,3V
4,3V
4,9V
1,5V
0/0,7V[MUTE]
0V
4,6V
4,6V
4,6V
4,6V
4,6V
4,6V
4,6V
4,6V
4,6V
4,6V
4,6V
4,6V
4,6V
4,6V
4,6V
4,6V
9,1V
5V
5V
0V
9,2V
5,8V
12,3V
12,4V
12,4V
7,8V
9,2V
9,2V
9,2V
9,2V
12,4V
12,4V
9,9V
0,6V
0V
4,4V
4,4V
4,4V
4,4V
3,8V
4,4V
5V
3,8V
0,9V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
4,4V
2,4V(25
°
C)
5V
6,2V