EN 79
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
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
F218 E13
F219 F2
F220 F2
F221 G13
F222 G13
F223 G13
F224 G1
F225 G1
F226 G2
F227 G2
F228 H1
F229 H1
3307 I5
6200 A13
7206 C13
7207 B8
7208 D12
7210 E12
7211 E13
7212 F8
7213 G10
7214 F8
7215 H10
F210 A6
F211 A12
F212 C13
3278 G11
to Audio Tuner
Line Out
F213 D1
F214 D1
F215 D1
F216 E1
F217 E6
3288 I1
3289 I10
3290 I2
3291 I2
3292 I3
3293 I3
3294 I4
3295 I8
3296 I4
3297 I5
3299 I4
3306 I4
6201 C14
6202 E12
7200 A8
7201 A13
7202 B11
7203 A12
7204-1 B11
7204-2 D11
7205 C12
3263 F9
3267 F9
3268 F12
3269 F5
3270 F5
3271 F2
3272 F8
3273 F2
3274 G3
3275 G3
3276 G10
3277 G9
3279 H2
3280 H9
3281 H2
3282 H9
3283 H2
3284 H2
3285 H11
3286 H9
3287 I1
3242 D9
3243 D10
3244 D12
3245 D1
3246 E2
3247 E5
3248 E7
3249 E5
3251 E12
3252 E2
3253 E2
3254 E3
to AV board
3255 E3
3256 E7
3257 E9
3258 E13
3259 E7
3260 E14
3261 F12
3262 F7
3221 C12
3222 C10
3223 C13
3224 C12
3225 C2
3226 C14
3227 C10
3228 C11
3229 C9
3230 C2
3231 C11
3232 C9
Line 2
1953
3233 C10
3234 C14
3235 D12
3236 D13
3237 D13
3238 D1
3239 D10
3240 D12
3241 D2
3201 A7
3202 A9
3203 A8
3204 A8
3205 A9
3206 A11
3207 A12
3208 A13
3209 A13
3210 A5
3211 B13
3212 B5
2330 G9
2331 G5
3213 B7
3214 B12
3215 B2
3216 B12
3217 B12
3218 C9
3219 B10
3220 C2
2341 H3
2342 H9
2343 H9
2344 H9
2345 I9
2346 I2
2347 I2
2348 I3
2349 I3
2350 I5
2351 I7
2352 I5
2290 D9
2353 I6
2354 I4
2355 I5
3200 A7
2318 E2
2319 E3
2320 E3
2321 E7
2322 E7
2323 F9
2324 F5
2325 F3
2326 F3
2327 F7
2328 G3
2329 G3
2332 G9
2333 G4
2334 G4
2335 G13
2336 G13
2337 G9
2338 H3
2339 H3
2340 H3
2233 C11
2234 C3
2235 C14
2236 C11
2237 D9
2238 D9
2258 D2
2259 D10
2286 D11
2287 D3
2289 D9
B
C
D
E
F
G
H
I
A
B
2291 D10
2292 E3
2293 E7
2298 E3
2299 E5
2300 E7
2301 E8
2302 E12
2303 E2
Line 1
2228 C10
2229 C9
1
2
3
4
5
6
7
1950
COMBI BOARD
AUDIO PROCESSING 1
3
4
5
6
7
8
9
10
11
12
13
14
A
1200-4 H14
1202 F1
1205 H1
2200 A7
2201 A7
2202 A9
2203 A13
2204 B5
2205 B3
2206 B7
C
D
E
F
G
2216 B9
2217 C11
L/R FRONT SPEAKERS
SURROUND SPEAKERS
8
9
10
11
12
13
14
1
2
H
I
1200-1 D1
1200-2 D1
1200-3 G14
2207 B8
2208 B7
2209 B3
2210 B9
2211 B10
2212 B3
2213 B5
2214 C4
2215 C4
7213
BC817-25
F215
GND_ALR
470n
2204
470n
2352
3226
10K
F216
GND_A
27K
3254
3262
2K2
MUTE
10K
3261
100K
3260
GND_ALR
470R
3256
GND_ALR
47u
100K
3267
GND_ALR
16V
2333
F229
F227
F224
2348
SCN
2327
220p
3281
4n7
4K7
2207
1K0
3280
100n
220n
2206
7208
F223
BC817-25
3268
BC817-25
10K
7203
10K
3230
47p
2236
6K8
3213
3212
10K
27K
220R
3242
3290
470n
2287
2334
100n
SCN
22n
2301
3248
2300
220n
6K8
GND_ALR
GND_AS
3247
10R
3287
4K7
470n
2298
2228
3223
1K0
GND_ALR
100p
3246
7
22
12
17
14
15
9
20
1
4K7
18
27
13
28
3
26
4
25
5
24
6
23
8
21
2
TDA7468
7214
16
10
19
11
2201
50V 4u7
470R
3201
4u7
50V
2200
470n
2325
2K2
3215
2211
1n0
3222
2209
22K
470n
220p
2319
3253
27K
3206
F228
3205
1K0
100K
4K7
3251
3207
1K0
GND_ALR
F222
4u7
2322
D
GND_ALR
50V
2205
470n
2355
470p
GND_A
2354
470p
3306
27K
2326
3273
470n
3272
1K0
2342
1K0
47p
470n
GND_ALR
47R
2337
9
3214
1
10
11
2
3
4
5
6
7
8
11FE-ST-VK-N
1202
3224
47R
5
6
GND_ALR
D
1205
S6B-EH
1
2
3
4
47R
3216
47u
2213
2212
16V
470n
470p
10K
3249
47K
2323
F225
3263
GND_ALR
GND_AS
GND_AS
100R
3259
470p
2202
GND_A
10
11
GND_ALR
2K2
3203
3285
1200-4
LPR6520-A530
GROUND
1K0
47p
2343
27K
3299
BC857BW
7210
F212
4n7
4n7
2208
2293
GND_AS
3240
330R
2286
10V 100u
7204-2
5
6
7
84
22
12
17
14
15
9
20
1
NJM4556AM
27
13
28
3
26
4
25
5
24
6
23
8
21
2
7
TDA7468
7207
16
10
19
11
18
470p
D
BC817-25
7205
470n
2328
4K7
2350
3294
3293
27K
7212
BC847BW
10K
3220
1K0
3219
BC857BW
7206
3271 1K0
10K
3241
GND_AS
3270
#
GND_A
4K7
2353
470n
3297
470R
F219
3252
2318
220p
2303
27K
220p
4K7
3296
1K0
3258
3257
470R
27K
3292
BAS316
6202
2320
3284
4K7
220p
2340
470n
4K7
F220
3283
470n
2234
2K2
3225
2214
16V
47u
3295
3232
SCN
GND_ALR
1K0
1K0
F217
3243 1K0
F226
3204
4u7
50V
47K
F218
GND_ALR
2321
GND_A
470n
2299
BAS316
6200
GND_A
7202
BC817-25
SCN
47u
2332
16V
47p
2237
3218
D
2215
22n
220R
GND_ALR
4n7
2351
470n
2338
220p
220p
2347
F211
2346
3229
100R
1K0
27K
3286
GND_ALR
3228
2K2
3289
1n0
2345
10R
3288
3275
3274
39K
39K
3279
4K7
4
6
5
1200-2
LPR6520-A530
LPR6520-A530
47u
16V
2344
10K
3307
100R
47u 16V
2331
3277
2K2
3276
2330
1n0
470p
2335
2336
470p
1K0
3278
1200-3
7
9
8
LPR6520-A530
3282
1K0
47p
2238
4K7
3245
3217
150R
2229
470n
F210
470n
2216
2289
470n
3211
10K
3236
3221
1K0
330R
1
8
4
100u
10V
2217
NJM4556AM
7204-1
3
2
6K8
SCN
1n0
3227
2210
7200
BC847BW
7201
BC857BW
4K7
3210
3209
10K
15K
3208
GND_ALR
2203
35V
4u7
GND_AS
GND_HP
4u7
50V
2302
3234
15K
6K8
3233
3291
27K
2324
GND_AS
3269
470n
470R
D
3202
470R
GND_AS
470n
2339
GND_AS
GND_AS
470n
2292
27K
3255
470n
2341
GND_A
7211
BC857BW
GND_A
GND_AS
4K7
7215
BC817-25
3238
2233
47p
GND_ALR
100R
3200
GND_AS
GND_ALR
GND_AS
GND_A
D
GND_ALR
F221
GND_A
F214
GND_ALR
10K
220p
2349
3237
2291
GND_AS
1n0
150R
1n0
2290
3231
3244
GND_ALR
27K
6201
BAS316
1
3
2
1200-1
4u7
35V
2235
F213
2259
SC N
3239
100p
470n
22K
2258
3235
2329
470p
47R
AIN2L
+HP
HPREF
from 7214
AIN2R
AIN1L
AIN1R
AIN2L
AIN2R
AIN1L
AIN1R
MUX_R
to 2209
MUX_L
to 2205
LINE_RIGHT
ADC_IN_R
to 1200-3
to 1200-3
MUTE_SW
(Line Mute)
MUTE_SW
MUTE_SW
from 7210
MUTE
MUTE
MUTE HEADPHONE
from 7210
DAC_R
DAC_L
EXT3R
/37 only
EXT3L
+HP
+HP
SEL_L
SEL_R
TU_CLOCK
R
L
TU_Stereo
TU_DI
TU_CE
TU_RDS
9V_TUNER
TU_SD
5VSTBY
LINE_LEFT
ADC_IN_L
MuteLine
DAC_SL
DAC_SR
LINE_RIGHT
LINE_LEFT
IPFAIL
XMUTE_ALL
PDN_MUTE
from 3258
from 3258
PDN_MUTE
PDN_MUTE
MUX_L
MUX_R
5VSTBY
MuteAll
DOWNMIX_L
DOWNMIX_R
+9V2
AMP_SL
1301
1301
AMP_SR
AF_I2C_SCL3
AF_I2C_SDA
XMUTE_ALL
+9V2
AF_I2C_SCL1
AF_I2C_SDA
HPREF
HPREF
HPREF
AMP_LEFT
AMP_RIGHT
HP_LEFT
HP_RIGHT
5VSTBY
MuteHP
1
# for provision only
Combi board LX7500R, 181004
EVM
V
DC voltages measured in Stop mode
with no audio output.
...V
4,6V
12,3V
5,8V
9,1V
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
0V
0V
5V
5V
4V
4,6V
5,8V
5,8V
5,8V
5,8V
12,3V
0V
5V
4,8V
4,7V
4,8V
4,9V
12,3V
0V
0V
0V
0/4,8V[MUTE]
0/4,8V[MUTE]
5V
4,9/4,3V[MUTE]
4,8V
0V
0V
0V
0/4,9V[MUTE]
5V
4,9/4,3V[MUTE]
0V/0,7 [MUTE]
5,8V
5,8V
5,8V
5,8V
4,6V
4,6V
4,6V
4,6V
4,6V
9,1V
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
0V
5V
5V
4V
4,6V
0V
0V
-2,8/0,7V[MUTE]
0V
0V
0/0,7V[MUTE]
4,6V
4,6V
4,6V
4,6V