Service manual
Schematic Diagrams
AUDIO (ALC655) & MDC B - 27
B.Schematic Diagrams
AUDIO (ALC655) & MDC
+3 V
AUD_AGND AUD_AGNDAUD_AGNDAUD _AG N D
AUD_AGND
AUD_AGND
AUD_5VS
+3V
+5 VS
+5V S
AUD_ VDD
AUD_ VDD
+VD D5
+1 2V
AUD_VDD
AUD_AGND
AUD_AGND
AUD_AGND
AUD_AGND AUD_AGND
AUD _VDD
AUD _VDD
AUD_AGND
AUD_ VDD
AUD_ VDD
AUD_AGND
AUD_AGND
AUD_AGND
AUD_ VDD
AUD_AGND
AUD_AGND
AUD_AGND
AUD_AGND
AUD_AGND
AUD_AGND
AUD_AGND
AUD_AGND
MIC1-VR EFO-L 16
MI C 1- L 1 6
H8_BEEP 33
AC_SPKR 13
INT_CD_L 35
PCMSPK 20
AC97- SY NC 1 3
AC97- RESET# 13
CD_ GN D 35
INT_CD_R 35
FRONT-L16,27
FRONT-R16,27
AUD _VDD 16,27
+3VS 2,4,8, 9,10,11,12,13,14,16,18,19,22,23,24,25,28,29,32,33,35,36
+5VS 8,11,14,16,19,22,23,28,29,30,33,34,35,36
+3V 4,9,10,11,13,14,17,18,19,20,21,22,23,24,29,32,33
+12V 8,20,21,23,28,29, 30,32
AC9 7-SDI N113
AC97- SDOUT 13
SPDI F116
ICHPWROK16, 24,2 8,3 3
+VDD5 9, 13,16,19,23,29,30,32,34,36
LI NE_R 16, 19
LI NE_L 16, 19
MONO-OU T28
PRE_LO UT27
PRE_R OUT27
PRE_LO UT27
PRE_R OUT27
AC97_C LK13
SEL16,28
EAPD22
H8_MUTE 22
AUDI O_R 1 9
AUDI O_L 19
AC9 7-BCLK 13
AC97 -SDIN0 13
AC97-BCLK 13
Z2642
AC97-SY NC
AC97-SDOUT
AC97-SDIN1
Z2630
Z2628
AC97-RESET#
Z2629
Z2605
Z2653
Z2612
INT_CD_L
Z2627
MI C1- VR EFO -L
Z2626
CD_GND
INT_CD_RZ2616
Z2617
MI C1- L
Z2607
Z2624
Z2625
Z2606
Z2618
Z2610
Z2615
Z2609
Z2611
Z2603
Z2613
Z2614
LINE_R
LINE_L
RO-_R
LO-_R
LO+_R
RO+_R
Z2666
AC97-BCLK
Z2665
Z2668
Z2632
Z2622
Z2621
Z2619
Z2620
RO-
LO-
RO+
LO+
Z2643
Z2654
BEEP
Z2604
Z2669
Z2636
Z2637
Z2638
Z2639
Z2645
Z2644
Z2640
SEL
Z2633
Z2635
Z2634Z2601
Z2647
Z2646
Z2641
Z2660
Z2659
Z2651
Z2662
Z2649
Z2648
Z2661
SEL
Z2658
Z2670
Z2650
Z2656
Z2652
Z2681
Z2664
Z2655
Z2663
Z2608
Z2672
AUD _VDD
Z2677
Z2679
Z2678
SEL
Z2657
Z2675
Z2680
Z2602
AUDI O_R
AUDI O_L
BTL
BTL
C65
*0.1U
L67
L_0805(159)
C248
270P
C243
6.8P
R524
*20K
T335
JMDC1
AMP/ CON12
12
34
56
78
910
11 12
C191
1U
C625
0. 1 U
R549
*0
C626
0.1U
C295
*4.7U_0805
C826
1U
C620
1U
T
R266
*1M
C192
*1U
C873
1000P
C227
68P
C830
0. 1U
C247
0.1U
C618
*1U
R224
*20K
C589
1U
R225
20K
U18
ALC655
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
DVDD1
GPIO0
GPIO1
DVSS1
SDAT A-OUT
BIT-CL K
DVSS2
SDATA-IN
DVDD2
SYNC
RESET #
PCBEEP
Sense A
LINE2-L
LI NE2- R
MI C2- L
MI C2- R
CD-L
CD-GND
CD-R
MI C1- L
MI C1- R
LINE1-L
LI NE1- R
AVDD 1
AVSS1
VREF
MI C1-VR EFO-L
LIN E1-VREFO-L
MIC2-VREFO
LI NE2-VR EFO
MIC1-VREFO-R
DCVOL
Sense B
FRONT-L
FRONT-R
LINE1-VREFO-R
AVDD2
SURR-L
JDREF/NC
SURR-R
AVSS2
CEN
LFE
SID ESUR R-L
SID ESUR R-R
SPDI FI /EAPD
SPDI FO
C185
0. 1U
L66
L_080 5(159 )
CP7
8P4CX180PF( M)
1
2
3
4 5
6
7
8
C602
1U
T181
R226
20K
R779
*0
L16
8P4LX120(173)
1
2
3
4 5
6
7
8
T284
T281
U17
TPA2020A
18
21
7
22
20 15
19
3
10
11 14
1
16
9
8
6
5
4 2
17
23
12
13
24
25
26
27
28
29
30
31
32
33
RVdd
RLI NEIN
LVdd
ROUT+
RHPI N ROUT-
RBYPASS
LOU T+
LOUT-
MUTE IN SE/BTL
GND/HS
HP/ LINE
MU T E O UT
SHUTDOWN
LBYPASS
LHP IN
LLI NEI N TJ
NC
NC
GND/ HS
GND/ HS
GND/HS
THREM/GND
THREM/GND
THREM/GND
THREM/GND
THREM/GND
THREM/GND
THREM/GND
THREM/GND
THREM/GND
R554
10K_1%
C221
0.1U
C606
1U
R553
10K_1%
R550
*0
T45 1
T259
T257
R271
11.5K_1%
C184
0. 1U
C612
100P
+
C611
10U_0805
C609
4. 7U _ 080 5
C258
10U_10V_1206
L15
L_0603( 164)
C592
1U
Y3
*24 .576MHz
1 2
S1
SHORT
21
C251
270P
C623
2.2U_16V_0805
C183
0.1U
C828
*1U_X7R
T25 6
D67
RB751V
AC
Q53
2N7002
G
S D
C600
1U
T258
C252
0.1U
+
C617
10U_0805
C274
10U_10V_1206
C182
0. 1U
C261
0.1U
C610
4.7U_0805
R545
22
+
C622
10U_0805
C66
0. 1U
C189
1U
C266
0.1U
C872
1000P
JSPK3
ACES/ C ON4
1
2
3
4
1
2
3
4
R541
*1K
R532
10K
C260
0.1U
L65
8P4LX120(173)
1
2
3
45
6
7
8
R552
11.5K_1%
U16
TPA2020A
18
21
7
22
20 15
19
3
10
11 14
1
16
9
8
6
5
4 2
17
23
12
13
24
25
26
27
28
29
30
31
32
33
RVdd
RLINEIN
LVdd
ROUT+
RHPIN ROUT-
RBY PASS
LOU T+
LOUT-
MU TE I N S E / B TL
GND/HS
HP/LINE
MU TE OU T
SHUTDOWN
LBY PASS
LHPIN
LLINEIN TJ
NC
NC
GND/HS
GND/HS
GND/ HS
THREM/GND
THREM/GND
THREM/GND
THREM/GND
THREM/GND
THREM/GND
THREM/GND
THREM/GND
THREM/GND
C188
1U
C207
0.1U
C178
1U
T45 2
JSPK1
ACES/ CON4
1
2
3
4
1
2
3
4
T28 2
C621
1U
Q47
4800
4
6 2
5
7 3
1
8
C242
0. 1U
C246
*22P
12
R252
22
T283
C187
1U
C212
0.1U
R50
0
T45 0
C250
0.1U
R221
20K
R223
20K
C232
*22P
12
C214
1U
T27 9
C245
6.8P
C255
0. 1U
R269
0
U37
TC7S32F
1
2
3
5
4
IN
IN
GND
VCC
OUT
R222
*20K
C607
0.1U
Q51
2N7002
G
S D
L37
L_1206(162)
1 2
C190
1U
C595
*1U_X7R
R327
100K
T28 0
C593
*1U_X7R
C827
1U
C193
*1U
C594
1U
C202
0.1U
C624
2.2U_16V_0805
R314
1M
C249
0.1U
CP6
8P4C X 180 P F ( M )
1
2
3
4 5
6
7
8
+
C615
10U_0805
T180
C619
1U
R525
*20K
C228
0.1U
T
C829
*1U_X7R
C244
0.1U
Spilt by DGND
REMOVE M/E POSITION
FRONT
MDC MODEM
20-C2D00-206
20-43100-104
R-A/M 1.25mm
For ALC650
SURROUND
20-43100-104
Layout Trace? ? ?
12~13mil
AGND
AGND
PIN 32,34 INT PU.
2005/11/16
Vcc Power trace >= 60mil
PLEASE PLACE CLOSE CODEC &
AMP THE POWER INPUT PINS
24.576MHz
94/7/25
change to Audio_GND
Rubband
94/7/25
chang e to A udio_GND
Rubband
94/7/25
change to Audio_GND
Rub ban d
Change Net N ame
Br yant
Br yant
Change Net Name
Br yan t
Change Net Name
Bryant
Change Net Name
Remove parts
Br yant
R-A/M 1.25mm
9/29
Bryant
Bryant
Bryant
94/9/14
Rubband
94/ 9/16
Brya nt
94/9/14
Re m ove
R551
Rubband
Del R781,R268,R798
Brya nt
Del R797,R270,R780
Del
R381,C348, U24,R820
94/9/26
Rubband
94/9/28
del R541
Rubband
Bryant
9/29
Bryant
Tied at one point only under the
codec or near the codec
Bryant
Bryant
Brya nt
94/11/16 Kevin
94/11/16 Kevin
94/11/16 Kevin
DEL R7 4
DEL R267
Bryant
Bryant
2005/11/16
Del R77
2005/11/16
Bry ant
Del PR 1
Sheet 27 of 45
AUDIO (ALC655) &
MDC