Audio Part - Philips AZ7381 Service Manual

1 2 3

AUDIO PART

A
B
7300
DBB
3370
MUTE 13
0V
1k
BEEP
A
14
0V
C
D
15
5300
A
16
16,93
1.4V
D
3371
17
3.0V
+3 100R
18
A
19
E
A
20
A
DBB/LEVEL
3302
21
TREB 47k
3.0V
F
22
1.4V
CL16
SRDA
23
1.5V
CLK
LRCLK
24
1.5V
G
6 5 7
H
NPC → DAC
TRANSFER OF AUDIO SAMPLES VIA SERIAL INTERFACE OF CD7 AND NPC
5 SCLK
WCLK left channel
6
I
DATA
7
MABEL 3A/4A - PB2 Audio Part 19980318
1 2 3
CS 46 530
4-5
4 5 6
TC9404FN
3373
0R05
D
3372
MCK GNDD 12
0R05
A A
11
L/R
GNDX
3307
VDA 10
XI
3.0V
150R
9 3311
LO
XO
1.5V
220R
Analog
filter
GNDA 8
VDX
0V
Output
7
BS circuit VR
1.5V
A
6
GNDA
EMP
0V
Analog
filter
3310
5
SM RO
220R
1.5V
Output
3306
4
circuit VDA
HS
3.0V
150R
3
DATA P/S
3.0V
2
BCK T1
Test
A
VDD
3309
1
LRCK
3.0V
150R
DAC
A A
TREB
right channel
4 5 6
7 8 9 10
2.6V
3360
10k
A
3318
0.7V
BC847B
10k
7355
7350
+3 2381
0V
330n
3303 3319
2319 11
Switch
8k2 2k2
1u
12
Power on
1.4V Switch
3313
2
3300
27k
13
3
+
in
10k
3A 1
14
+
3312
2A 1.4V in
27k
2350
15
out
A
1.4V
22u
2351
16
1.4V
3304
2318 A
in
8k2 22u
1u RF out
2352 17
3.9V
A
1u Ripple
Filter
2353 18
+3
1.2V
A
22u RF in
2354 19
1.4V
0V Beep in
100n
0.7V
3321
7356 20 Vcc
10k
27k
BC847B
1,7-3,6V
A
7354
Headphone amplifier
BC857B 3.1V
+3 +3 A
3.1V
2.5V
7 8 9 10
4-5
11 12 13
4.1V
+A
2349
3.9V
33n
3358
7357
100R +3
BC847B 0V
3361
0V
100k
BA3574BFS
2358
0V
10 2356 7351
time
100n
MUTE
A BC847B
0.8V
2u2
9
Low-pass 1.4V
boost
43k 43k
A
3351
8
DBB 0.7V
100k
Switch
time 7
0V
+ - + -
AVC 7352
A
6
BC847B
in A
A
Mix out 5
1.4V A
+ +
3314
4 left out
+
1.5V
-
out
3 2362
+
1.4V
-
Vref
2u2
A
3315
2 right out
+
1.5V
- out
1
Beep
2k
A
A A
11 12 13
14 15
1350 F15
2303 D 3
2313 D 6
2314 E 6
2316 E 7
2317 D 7
2318 E 7
A
2319 D 7
2320 G 6
2321 D 8
2322 E 8
2323 E 6
2324 H 8
2325 G 6
2349 B13
2350 E 9
2351 E 9
2352 F 9
2353 F 9
2354 F 9
B
2355 G 9
2356 D12
2357 C12
2358 D12
2360 E12
2362 F12
2363 F13
3349 2364 F13
2367 G14
1M
2368 G14
DBB/LEVEL
C
2370 G14
2381 C 9
0V 2382 F 8
3300 D 9
3302 F 3
3303 D 8
3304 E 8
3306 F 7
3307 C 7
A
3309 G 7
3310 E 7
D
3311 D 7
3312 E 8
+3
3313 D 8
3314 F13
3315 F13
3318 C 8
3319 D 9
3320 F 8
3321 F 8
DBB
0.7V
3322 H 8
3323 H 8
E
3324 H 8
3349 C13
3350 D12
3351 D12
3354 E13
1350
3355 G13
1R
Headphone
3356 G13
3358 C10
3359 C 9
R
3360 C 8
F
3361 C13
L
3370 C 3
1R
3371 D 2
3372 C 6
3373 B 6
3375 F 7
5300 C 3
6300 B 9
7300 B 3
7350 C10
7351 D13
G
7352 E13
7353 B10
ESD 7354 G 8
7355 C 9
7356 F 8
7357 C13
H
I
DC Voltages measured in
V EVM PLAY-mode, ESA off
Set supplied via mains adapter
14 15