Micromax S120 Manuale utente

S120 L3 Service Manual

Micromax S120

1. Technical Specifications :

Please fill below information in Remarks, Below given remarks are for reference only

Particular Remarks

Key Matrix For Flashing SPRD Flashing tool

Chipset SC6531DA

Android Version NA

Processor Frequency 900/1800MHz

Network Mode GSM

ROM 32Mb

RAM 32Mb

Internal memory 4MB

Expandable Memory 8GB

Factory mode code #*868*#

Good Earpiece value in ohms 32 Ohm

Good Loudspeaker value in ohms 8 Ohm

Good Mic value in ohms 330 Ohm

Good Vibrator value in ohms NA

S120 L3 Service Manual

2. CAUTIONS

I. Flashing & Servicing must be undertaken by qualified personnel only.

II. Ensure all work is carried out at an anti-static workstation and that an anti-static wrist strap is worn.

III. Use only approved Tools & components as specified in the parts list.

IV. Ensure all components, modules, screws, and insulators are correctly re-fitted after servicing and

alignment

V. Ensure all cables and wires are repositioned correctly if Handset disassembled

VI. Electrostatic discharge can easily damage the sensitive components of electronic products. Therefore,

Service Centre must adhere the precautions which mentioned above.

S120 L3 Service Manual

Basic Structure of the Mobile Phone

PCBA Diagrams of S120 Mainboard

Charge MOS tube, charger will

out work if it broken

RF PA,no signal if broken

USB socket,cannot charge and download if

broken

26M crystal,cannot start the phone if broken

Charging connector,cannot start the phone

if broken

CPU,cannot start the phone if broken

TF socket,cannot read T card if

broken

3.5 Heardset if broken

S120 L3 Service Manual

SIM socket,cannot read SIM

card if broken

S120 L3 Service Manual

Camera bonding pad,camera no

function if broken

LCD bonding pad,no display if

broken

Vibrator if broken

S120 L3 Service Manual

3. L3 Level trouble shooting

Please add trouble shooting/ Repairing steps against below given symptoms

Images must paste against every suggested troubleshooting hint

1) Doesn’t Power On

1. Check BAT1 battery socket if welding good

2. Check X101 if normal

3. Check U100 if normal

U100

BAT1

X101

S120 L3 Service Manual

S120 L3 Service Manual

2) Restart / Hang

Same as item 1

S120 L3 Service Manual

3) LCD

1. Check if LCD welding good

2. Check if main board short circuit

J601

S120 L3 Service Manual

4) Touchpad --- NA

5) Proximity Sensor------ NA

6) Accelerometer-------- NA

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