Lesson 7 - Hardware trouble shooting (basic)

BASIC HARDWARE REPAIR PROCEDURE

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Lesson 6 - Hot air technique (basic)

Lesson 5 - Jumpering Techniques (basic)

materials needed:

soldering iron 20 watts 2 pcs

soldering stand 2 pcs

soldering lead

jumper wire or magnetic wire

soldering paste

BACKLIGHTING PROCEDURE

1.) Get the mapping of the pcb backlight.

ex. 3310

LCD LED

KEYPAD LED

2.) Get the polarity of the bulb.

3.) Install backlight according to their polarity and their pcb mapping.

note: do not mix high resistance bulb to low resistance bulb.

types of connection:

a.) series connection

b.) parallel connection

activity:

1. install backlight at flat surface board

2. install backlight at hanged surface board

3. make a jumper

Lesson 4-Dis-assembly Assembly procedure

Things To Remember when Dis-assembling a Phone.
ESD- Electrostatic discharge

ESD PREVENTION
1. HOLD PCB AT THE SIDE
2. USE MAINTENANCE PLATE
3. DISCHARGE ESD IN THE BODY
4. DISCHARGE CAPACITOR
5. USE GLOVES IF NECESSARY

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Lesson 3 - Basic Cellphone accessories

CELLPHONE ACCESSORIES (LESSON 3)

1. SWITCH - an electronic device that used to power on and off the phone

2. SPEAKER - an electronic device that converts electrical impulse to audio waves

3. MICROPHONE - an electronic device that converts audio waves to electrical impulse.

4. BUZZER - an electronic device that has an armature inside to produce sound.

5. VIBRA MOTOR - an electronic device that has an armature inside to produce vibration.

6. LCD- Liquid crystal display

Things To Remember when Dis assembling a Phone

ESD- Electrostatic discharge

ESD PREVENTION

1. HOLD PCB AT THE SIDE

2. USE MAINTENANCE PLATE

3. DISCHARGE ESD IN THE BODY

4. DISCHARGE CAPACITOR

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Lesson 2-Basic Electronics

BASIC ELECTRONICS(LESSON 2)

1. RESISTOR - an electronic device that resist the flow of current in a given circuit.

PHYSICAL APPERANCE

SCHEMATIC DIAGRAM SYMBOL

2. CAPACITOR - an electronic device that store electrical charge in a given circuit.

PHYSICAL APPERANCE

SCHEMATIC DIAGRAM SYMBOL =>

3. INDUCTOR - an electronic device that induce current in a given circuit.

PHYSICAL APPERANCE

SCHEMATIC DIAGRAM SYMBOL =>

4. TRANSISTOR - an electronic device that acts like a switch and amplify.

PHYSICAL APPERANCE =>>

SCHEMATIC DIAGRAM SYMBOL =>

5. INTEGRATED CIRCUIT (IC) - A complex set of electronic components and their interconnections that are etched or imprinted onto a tiny slice of semiconducting material.

PHYSICAL APPERANCE =>>

SCHEMATIC DIAGRAM SYMBOL =>

6. RFPA (Radio frequency power amplifier) - an electronic device that amplify to produce a signal.

PHYSICAL APPERANCE =>>

SCHEMATIC DIAGRAM SYMBOL =>

REFER TO DIAGRAM IT IS ALMOST THE SAME WITH THE INTEGRATED IC

7. FREQUENCY BANDS

900MHZ

1800MHZ

1900MHZ

850MHZ

8. FREQUENCY BANDS PACKAGES

a. SINGLE BAND - 900MHZ ex. 5110,6110

b. DUAL BAND - 900MHZ/1800MHZ ex. 3210,3100, 7650

C. TRI BAND - 900MHZ/1800MHZ/1900MHZ ex. 6600

D. QUAD BAND - 850MHZ /900MHZ/1800MHZ/1900MHZ ex. N70

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Lesson 1-Basic tools and equipment

BASIC TOOLS AND EQUIPMENTS (LESSON 1)

BASIC TOOLS AND EQUIPMENTS (LESSON 1)

1. precision set of screwdrivers - opening tools

T5, T6, T7

2. Tweezers

a. bend tip - ideal for replacing I.C.

b. straight tip - ideal for backlighting, jumpering

3. cleaning materials and solutions

a. eraser - for removing stains/clean contacts usually for keypad malfunctions.

b. toothbrush - for removing stains from eraser and others

c. lacquer thinner - for first aide for water damaged

d. flux inject - for reheating a component

e. ensenso - for reheating, ideal for begginners

f. alcohol 70% solution - alternative sol'n 4 lacqueer

g. lighter fluid -

4. analog multi tester

a. DCV10 - for voltage testing direct current

b. X1 - for continuity testing,jumpering

5. Soldering iron with stand 2 pieces 20 or 30 watts

6. Soldering lead .03mm- for Resoldering cold solder's.

7. Soldering paste - for cleaning soldering tips, etc

8. Dessoldering wire - substitute for dessoldering pump to remove excess lead in the pcb

9. Maintenance plate-used to hold the pcb and to avoid ESD- electro static discharge

10. BGA plate (ball grid array) - for reballing I.C. serve as molder for balls of I.C.

11. spatula- for applying bga paste to bga plate, used for reballing ic.

12. bga paste - soldering paste in a form of paste for reballing

13. magnifying lamp with lens - for small components to identify small parts.

14. regulated power supply variable - for battery shock, battery replacement.., etc

15. jumper wire double coated wire- for lost connection problem

16. hot air (rework station)- for removing/ resoldering small components, IC, etc

17. cutter plier

18. long nose plier

19. cutter blade

20. repair manual with schematic diagram vol. 2 nokia series

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