Download saleem Mother Board 10 PDF

Titlesaleem Mother Board 10
TagsDynamic Random Access Memory Bios Random Access Memory Media Technology Electrical Engineering
File Size423.3 KB
Total Pages35
Document Text Contents
Page 1

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Mother board

Manufacturing companies list of SMD IC’s

1) ITE
2) WINBOND
3) ALI
4) SMBC

Checking process : compare to ground 14%pins shows continuity.

GATES:
Inside of IC is called gates ( input,output functions). Inside of gates is 2 to 3 transistors are
functions.

1) AND GATE

2) OR GATE

3)NOT GATE

4)NAND GATE

5)NOR GATE

AND GATE:
If any one input is low so output will be low.

A B C
1 1 1
1 0 0
0 1 0
0 0 0

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OR GATE:

If any one input is high so output will be high

A B C
0 0 0
1 0 1
0 1 1
1 1 1

NOT GATE:
Not gates used in inventors .it require one input .if input is low output will be

high(reverse function of input side).

A y
0 1
1 0

NAND GATE:

If any one input is low output will be high.

NOR GATE:

A B Y Y1
0 0 0 1
1 0 0 1
1 1 1 0
0 1 0 1

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17 ground
19 vcc
22 ground
25 +3.3v
28 ground
31 +3.3v
34 ground
36 +3.3v
38 ground
41 +3.3v
43 +3.3v
46 ground
49 ground
54 +3.3v
57 ground
59 vcc
61 vcc
62 vcc

AGP Bus connector:

SIDE A

+12 V--------pin no 1
VCC --------pin no 9,16,28,45
GND ------- pin no 5,13,19,31,37,43,49,55,61

SIDE B

+5 V---------2,3
VCC -------5,13,19,13,31,37,,43,49,55,61.

CNR connector:

A1 a30

B1 B30


A1 A30

B1 B30

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SIDE A

+12V------pin no 16
+3.3v -----pin no 18
+5v -----pin no 19
GND -----pin 3,6,9,14,17,20.

SIDE B

+12V-----18
+5V-------15
+3.3V-----19
GND-------4,7,10,13,17,20,23,27.

Mother board spare parts numbers:

Small FET’s

HJ882
NIKOP3055L
9916H
APL1084
NIKOL1085
Alpha AS 2830
761070
PH 3055L
23NO3L
DI802
NIKO P45NO2L
DI202
AMS 1085
F3055L
40N03
3055
NIKO 1084
NIKO 1085

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OSCILLOSCOPE

If refreshing signal is not coming:

1 Check the all dry solders in mother board
2 Check the MOSFET JFET and 8 pin IC
3 Check all capacitors
4 Check the RAM & RAM slots
5 Check the crystal IC
6 If possible change the processor

Problems

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BIOS Problem
1 RAM test stop
2 Hanging
3 Windows screen continue running
4 No display
5 Keyboard error

P-111 Mercury Board
No display

1 Check the capacitors if damaged replace it
2 Replace the SMD IC

HANGING
1 Replace the RAM
2 Check the MOS FET or replace MOS FET ‘S
3 Upgrade the BIOS

P-111 Intel green board-
No display
Change MOS FET (big)

HANGING
BIOS problems
P-1V Giga byte mother board 845 GL M odel
No display
Check the transistors & replace it
HANGING
ITE SMD IC replace

Intel original mother board
No display continues beep sounds
Replace the RAM IC
When we install the operating system first files copy OK but after installation it will be
hanging
Processor problem
INTEL P-11 slot processor
No power supply

1 Check VCC to ground
2 Check MOS FET’s
3 Dry solder the power supply section
4 Replace the BIOS

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