MSI MS-95B7 Schematics
A B C
Dell Controlled Print
D
REVISIONS
1
Bezel Present
Bezel Cyclops LED connector
BEZEL
CONN
TO DO LIST:
REV
A02
DESCRIPTIONECO DATE
12/17/01 WILL SMITHPRODUCTION RELEASEA00 118557
CHANGED LED DPN TO 9P254A01 125441 04/11/02 M SHELTON
136667 10/25/02
CHANGED U3 FROM 0C068 TO 5Y977 - SEE pg4
APPROVED
CLAY PHENNICIE
1
2
CONN
Shift Bus
CPLD
LCD
ESM LCD display
2
Changes for x07:
I2C
TEMP
NMI SWITCH
PWR SWITCH
+ Changed R23 from 300ohms to 121ohm to get 20mA as speced
on PWR_LED
Potential changes if board is ever respun
+ Change R23 to 0805 footprint if R value more readily available/cheaper.
3
4
FRU
Power LED
+12V
Spkr
EXPORT RESTRICTION:
THE EXPORT OF THE INFORMATION, SCHEMATICS AND OTHER TECHNICAL DATA CONTAINED IN THIS DOCUMENT
IS CONTROLLED BY THE U.S. GOVERNMENT. THE EXPORT, DEEMED EXPORT OR OTHER TRANSFER OF THIS DATA
TO CERTAIN COUNTRIES AND INDIVIDUALS IS RESTRICTED. ANY TRANSFER, EXPORT OR REEXPORT, MUST BE
IN COMPLIANCE WITH THE U.S. EXPORT ADMINISTRATION REGULATIONS.
Spkr
PROPRIETARY NOTE
THIS ITEM IS THE PROPERTY OF DELL COMPUTER CORP. AUSTIN, TEXAS
AND CONTAINS CONFIDENTIAL AND TRADE SECRET INFORMATION. THIS
ITEM MAY NOT BE TRANSFERRED FROM THE CUSTODY OF DELL COMPUTER
CORP., EXCEPT AS AUTHORIZED BY DELL COMPUTER CORP., AND THEN
ONLY BY WAY OF LOAN FOR LIMITED PURPOSES. IT MUST NOT BE
REPRODUCED IN WHOLE OR IN PART AND MUST BE RETURNED TO DELL
COMPUTER CORP. UPON REQUEST AND IN ALL EVENTS UPON COMPLETION
OF THE PURPOSE OF THE LOAN. NEITHER THIS ITEM NOR THE
INFORMATION IT CONTAINS MAY BE USED BY OR DISCLOSED TO PERSONS
NOT HAVING A NEED FOR SUCH USE OR DISCLOSURE CONSISTENT WITH
THE PURPOSE OF THE LOAN WITHOUT THE PRIOR WRITTEN CONSENT OF
DELL COMPUTER CORPORATION.
Production: Build 0
Prototype: Build 1
DRAWN
DESIGNED
CHECKED
APPROVED
APPROVED
APPROVED
APPROVED
RELEASED
CLAY PHENNICIE
WILL SMITH, CLAY PHENNICIE
BERNARD FET 6/5/03
CLAY PHENNICIE
DRAWN
DESIGNED
CHECKED
10/25/02
10/25/02
10/25/02
ORIGINAL A00 DRAWING
WILL SMITH
WILL SMITH
SHAWN DUBE/LIBBY MCTEER
A CURRENT ISSUE OF THIS DRAWING MUST
INCLUDE A COPY OF THE FOLLOWING
ECO'S:
ECO
ECO
ECO
ECO
ECO
ECO
ECO
ECO
TITLE
SCHEM,CNTL-PNL,PE4600
DWG NO.
DATE
10/25/02 1 OF 4
DATE
DATE
DATE
DATE
DATE
DATE
DATE
DATE
COMPUTER
CORPORATION
AUSTIN,TEXAS
SHEET
3
12/17/01
12/17/01
12/17/01
4
REV.
A02262PY
DCBA
A B C
x06: Moved 3.3vAux_PWRGOOD from pin 14 to p16
D
1
+5V_FP
23
23
FRU DEVICE
1E161 has Xicor removed from the AVL
+3.3V_FP
+3.3V_FP
NMI
1
2
3
NMI_BTN
XREF1=2/1A
2
4
+3.3V_FP+3.3V_FP
PUSH BUTTON
x06: NMI was wrongly tied to gnd. Now 3.3
1
P1
+3.3V_FP
+5V_FP
1
2
PUSH BUTTON
SUB*_9P254
PWR
3
SW_ON
4
PWR_LED
1 3
R_LED_PWR
GREEN
x07- R23 changed to 121 ohm for 20 ma thru LED.
2
R23
1 2
121-1%
LED_PWR
21
R17
1K-5%
R22
1 2
1K-5%
NP*
21
R21
12
C7
1K-5%
.01uF 50V
U1
FRU_A0 1
FRU_A1
FRU_A2
2
21
A0
2
A1
3 6
A2 SCL
4
GND1
VCC
GND2
SDA
8
7
I2C_SEG_0_SCL
5
I2C_SEG_0_SDA
2
2
24C02
R18
1 2
NP*
1K-5%
R19
1K-5%
R20
1 2
NP*
SUB*_9K205
1K-5%
FRU_GND2
10
12
14
16
18
2
2
6
6
8
8
10
12
14
16
18
DISP_DATA
DISP_CLK
DISP_MUX_1
DISP_MUX_2
I2C_SEG_0_SCL
I2C_SEG_0_SDA
NC_MERLOT_3.3V_MAIN
3.3VAUX_PWRGOOD
+12V_SPKR
2
2
23
23
2
2
23
2
NC_P1_20
1
1
BZL_PRESENT
2
NMI_BTN
+5VBATT
2
2
2
SW_ON
LED_PWR
SPKR
3 4
3 4
5
5
7
7
9
9
11
11
13
13
15
15
17
17
19 20
19 20
SHROUDED
SMT HEADER
ADD*_42610_BARCODELABEL
ADD*_42753_REVLABEL
Power/reset switch and LED
ADD*_49YFV_PWB
ADD*_262PY_SCHEM
ADD*_82WYJ_ASSYDRW
NMI, POWER ON SWITCH & LED
R10
1 2
330-5%
2
3
2
INV_BUF_IN
DISP_CLK
R34
1K-5%
1 2
R26
100-5%
11
14
14
13
VHC14
10
U2
U2
12
VHC14
R_DISP_CLK21
NC_10
NC_12
C5
1 2
.01uF 50V
DPN: 21784
VHC14
1
U2
14
x06: Changed from Dual to single power LED
2
9K205 is FRU programmed P/N
Place all decoupling caps as close to IC as possible
X06: Changed R10 (FRU pull down) from 470 to 330
DPN: 21784
VHC14
2
3
INV_DISP_CLK
14
4
U2
DISP_CLK2
23
LM75
+3.3V_FP
SPEAKER
+3.3V_FP
C4
1 2
.01uF 50V
.01uF 50V
1 2
C3
50V-10%
470pF
C10
21
D1
31
1N914
21
R13
U3
2
2
I2C_SEG_0_SDA
I2C_SEG_0_SCL
1
SDA
2
SCL
VCC
A0
8
7
LM75_A0
1K-5%
1 2
NP*
R14
NP*
1K-5%
R15
1 2
1K-5%
S1
+
-
SMT
1
2
+12V_SPKR
2
SPKR
2
3
NC_OS
3
OS
A1
6
LM75_A1
Diode prevents large spike on SPKR
4
GND
A2
5
LM75_A2
from inductance of the speaker
LM75
SUB*_5Y977
A02: Replaced 0C068 with 5Y977. Parts 0C068 can cause permanent I²C Bus lock-up
2
DISP_DATA
R25
1 2
DISP_DATA2
23
that can be cleared only by removing power from the LM-75. Parts 5Y977 have
been tested to insure that they are not prone to this failure mechanism.
100-5%
C6
1 2
21
R16
1K-5%
R11
1 2
1K-5%
21
R12
1K-5%
NP*
+12 VOLT TRACE FROM CONNECTOR - PLEASE MAKE THICK
SPKR TRACE FROM CONNECTOR - PLEASE MAKE THICK
Connector to Control Panel
SPKR
.01uF 50V
1.2k x 4 = 300ohm -- 1206 for resistance
for 370mW of dissapation during DC
12V+
Two 7406 outputs for drive
Outputs should be normal float to minimize power and wear and tear
1uF
4
PROPRIETARY NOTE: THIS ITEM IS THE PROPERTY OF DELL COMPUTER CORP. AUSTIN, TEXAS AND CONTAINS CONFIDENTIAL
AND TRADE SECRET INFORMATION. THIS ITEM MAY NOT BE TRANSFERRED FROM THE CUSTODY OF DELL COMPUTER CORP. EXCEPT
AS AUTHORIZED BY DELL COMPUTER CORP., AND THEN ONLY BY WAY OF LOAN FOR LIMITED PURPOSES. IT MUST NOT BE REPRODUCED IN WHOLE
OR IN PART AND MUST BE RETURNED TO DELL COMPUTER CORP. UPON REQUEST AND IN ALL EVENTS UPON COMPLETION OF THE PURPOSE OF THE
LOAN. NEITHER THIS ITEM OR THE INFORMATION IT CONTAINS MAY BE USED BY OR DISCLOSED TO PERSONS NOT HAVING A NEED FOR SUCH
USE OR DISCLOSURE CONSISTENT WITH THE PURPOSE OF THE LOAN WITHOUT THE PRIOR WRITTEN CONSENT OF DELL COMPUTER CORPORATION.
Planar speaker drive design
TITLE
SCHEM,CNTL-PNL,PE4600
DWG NO.
DATE
COMPUTER
CORPORATION
AUSTIN,TEXAS
REV.
262PY A02
SHEET
10/25/02
2 OF 4
DCBA
4