Samsung Galaxy Note 1,Samsung problems

How to Solve Samsung Galaxy Note 1 Network Problem?

How to Solve Samsung Galaxy Note 1 Network Problem?

Problems

  • No network in Galaxy Note 1.
  • Low signals in Galaxy Note 1.
  • Note 1 only searching for network.
  • Continuous signal dropping in Note 1.
  • Call dropping.

Workaround

  • Restart your phone and check.
  • Remove and re-insert SIM card.
  • Go into settings and change network mode and check.
  • Check with any other good working SIM card.
  • Software update.

Hardware Solution

note 1 antenna

note 1 antenna contacts

  • Clean antenna contacts and check.

antenna contact pins coils connector

  • Pull up antenna contacts gently and place it back in your phone and check.
  • Check Coil 1 and Coil 2 and Capacitor C1 mentioned above.
  • Now re-solder antenna wire connector (Point 1), if damaged then place jumper across.
  • Change antenna wire and check.

antenna wire connector 2

  • Re-solder antenna wire connector (Point 2). If damaged replace jumper.

For No Network

battery terminal network connection

power amp ic network switch rf ic

  • Check battery voltage from +VE terminal with capacitor C2. If Capacitor C2 is damaged, replace it.
  • If the connection is broken between +VE terminal of the battery and C2, place jumper.
  • Make sure that the voltage at C2 is 3.8V (battery voltage).
  • Now check battery voltage at antenna switch capacitor C3.
  • If above step fails then re-heat antenna switch IC, if it is faulty then replace.

For Call Dropping / Signal Dropping

  • Re-heat power amp IC and check, if it fails then replace.

For Network Searching Problem

  • Check RF IC Capacitor C4.
  • Reheat RF UC, if it fails then replace it.

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2 Comments

  • Abhishek Nolia

    IF COIL 2 is missing (3rd Picture) ? can we repair or hardware is to be replaced. My Galaxy note say not registered to network n zero signal

    • If Coil 2 is missing than you need to change the entire Charging dock, as it cannot be re-soldered. Change your Charging dock.

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