Discover effective repair Ways for Samsung GT-E1200Y Mobile. Learn jumper techniques, IC bypass solutions, and pinout guides to fix your device easily.
Dead/Power On Problem
Repairing Ways:
Check Battery: Confirm the battery has a charge and check for any faults.
Power Key Circuit: Inspect the power key and its connection to the CPU (look at the "POWER KEY" connection in the schematic(Samsung-GT-E1200Y Diagram).
Power IC: Use a multimeter to check for continuity in the power IC circuit; repair or replace faulty components as needed.
Voltage Testing: Test the output voltage to ensure correct power delivery to the CPU.
Capacitor Check: Check All Largest Capacitor, if half short or full short then remove the capacitor.
Capacitor Remove Dead Solution
Check Damage Section: Proper Check All Damage Sections like - the charging section, Network section, and speaker section if all ok then the last option is CPU Work.
Software Solution: If no circuit Short No Damage, No Crack track line, Power Button Voltage 2.8+, then Upgrade Software.
Check CPU: After Checking all capacitors and the Other Damage section and Software, the last option is CPU Change / Reballing This CPU.
Power Key Jumper Solution Way
Charging Problem
Repairing Ways:
Charging Connector: Inspect the charging connector pins for physical damage or corrosion; clean or replace them if necessary.
Charging Circuit: Check components connected to the charging circuit on the PCB. Ensure all connections to the battery and power IC are intact.
Battery Connector: Verify that the battery connector is functional and securely connected to the mainboard.
Jumper The Missing Track Line: Check And Test Charging All Track if missing voltage, No reading then jumper.
Charging IC Bypass: This Mobile Charging Last Solution is Bypass Charging IC.
Charging Schematic Diagram
Samsung 10 Pin Charging IC Bypass Step By Step
Step 1: 1 no Pin to Connect with Zener Diode(4v - 5v) 10 no Pin.
Step 2: 4 no Pin to Connect 1 no Pin.
Step 3: 5 no Pin to Jumper Connect 8 no Pin.
Models Supported for This IC Bypass Method
This method applies to the following Samsung models:
Samsung E1200Y
Samsung B110E
Samsung B310E
Samsung B313E
It also applies to the (00 6G G58) IC Bypass, though you may need to consult the device’s service manual or datasheet for specific pinout details for each model.
Charging IC Bypass Solution Image
Final Considerations
Bypassing Charging IC: This procedure is typically done when the charging IC is damaged or malfunctioning, and it allows the device to still charge by bypassing the faulty part of the circuit.
Risks: You should only attempt this if you're comfortable working with mobile phone circuit boards. If done incorrectly, it could further damage the device.
Tools Required:
Multimeter (for checking connections).
Soldering iron and soldering wire (for making connections).
Diodes and jumper wires.
Charging PinOut Or Software Pinout
Ear Speaker and Loudspeaker Problem
Repairing Ways:
Speaker Connector: Check for any loose connections at the ear speaker and loudspeaker terminals.
Audio Path: Verify continuity from the CPU’s audio output (look for “SPK/RCV S/W” in the schematic(Samsung-GT-E1200Y Schematic Diagram) to the speaker.
Replace Speaker: If continuity and connections are good, the speaker may be damaged; replace it.
Ear & Loudspeaker Diagram
Audio IC Pinout
SIM Connection Break
Repairing Ways:
SIM Holder: Inspect the SIM card slot for any damage or corrosion. Clean it if needed.
SIM Track: Trace the connection paths from the SIM connector to the main IC and ensure there is no break in continuity.
Check Voltages: Measure the voltage levels at the SIM interface to confirm normal operation.
Display Repair
Solution:
LCD Connector: Examine the LCD connector and ensure it’s correctly connected and not damaged.
Display Track: Trace the display lines on the schematic and check continuity (see connections like “LCM_CD,” and “LCM_WEN” on the LCD(Samsung-GT-E1200Y Schematic Diagram).
Backlight LED: Inspect and test the backlight LED driver circuit for proper voltage and replace components if faulty.
Network Problems (No Service, Emergency Calls Only)
Solution:
Antenna Connector: Inspect the antenna connection for physical damage.
Network IC and Connections: Check continuity from the antenna to the RF IC and CPU (see RF/Baseband section in schematic).
RF IC Replacement: If issues persist, the RF IC may need to be replaced.
Reset Mobile
Software and Hardware Solution:
Software Reset: Perform a factory reset through the settings if accessible.
Manual Reset: If the device is unresponsive, use the hardware reset button or try resetting it by removing and reinserting the battery.
MIC Problems (Track Missing, Noise)
Repairing Ways:
MIC Connector: Check the microphone connector and ensure there is no physical damage or corrosion.
Microphone Path: Trace the microphone’s signal path on the PCB (from “MAIN MIC”(Samsung-GT-E1200Y Schematic Diagram) and check for continuity to the audio IC.
Replace MIC: If continuity is confirmed, the microphone may be faulty and should be replaced.
MIC Pinout & Diagram
Read More