System, Intel, System, part 1 – Intel 815 User Manual
Page 207: Speaker circuit
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
INFRARED
POWER SW.
H.D. LED
POWER LED
KEY LOCK
SPEAKER
FAN HEADERS
On-Board LED indicates th Standby
Well is on to prevent Hot-Swapping
Memory
NO STUFF.
FOR TEST
ONLY
NO STUFF.
FOR TEST
ONLY
System
SPEAKER CIRCUIT
INTEL(R) 82815 CHIPSET CUSTOMER REFERENCE BOARD
SYSTEM, PART 1
40
1.0
3-26-01
34
Platform Apps Engineering
1900 Prairie City Road
Folsom, CA 95630
REV.
R
Last Revision Date:
Sheet:
of
Title:
intel
V3SBLED
GP26LED
GP23LED
SPKR_NEG
PWRLED
R_IRTX
PBTN_IN
FP_PD
R_SPKRIN
SPKR_IN
SPKR_Q1G
SPKR
IDE_ACTIVE
TACH1
15
PWM1
15
TACH2
15
PWM2
15
GPIO23_FPLED
13
ICH_SPKR
13
AC97SPKR
26,27
KEYLOCK#
15
IDEACTS#
18
IDEACTP#
18
PWRBTN#
13
IRRX
15
IRTX
15
GPIO26_FPLED
13
VCC3SBY
VCC3SBY
VCC3SBY
VCC3SBY
VCC5
VCC5
VCC3_3
VCC3_3
VCC5
VCC3SBY
VCC3_3
VCC5
VCC5
VCC3SBY
VCC12
VCC12
VCC12
VCC12
VCC3_3
VCC3_3
CR7
LED
SP1
SPEAKER
J28
1
2
3
Q17
2N3904
CRb4
LED
CRa4
LED
JP28
1
2
3
J26
1
2
3
J4
1
2
3
J27
1
2
3
R96
330
1
2
R90
4.7K
1
2
R275
330
1
2
RP62
4.7K
1
2
3
4
5
6
7
8
R283
10K
1
2
R99
10K
1
2
R124
10K
1
2
R97
330
1
2
R270
4.7K
1
2
R269
82
1
2
R272
100K
1
2
R280
1M
1
2
R290
68
1
2
R289
68
1
2
R291
2.2K
1
2
R279
0K
1
2
C426
0.1UF
1
2
C396
1.0UF
1
2
R281
470
1
2
R282
220
1
2
C394
0.1UF
1
2
C264
0.1UF
1
2
C247
470PF
1
2
C400
470PF
1
2
+
C399
10UF 16V
1
2
C391
0.1UF
1
2
C393
0.1UF
1
2
C392
0.1UF
1
2
U8B
SN74LVC07A
4
14
7
3
U11A
SN74LVC07A
2
14
7
1
J18
FNT_PNL_CONN
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
SW2
PBSWITCH
U11B
SN74LVC07A
4
14
7
3
U8C
SN74LVC07A
6
14
7
5