kadang dalam koneksi baik itu telepon atau sms kita banyak kendala entah itu sinyal atau yang lainnya padahal di hp yang lain tidak ada gangguan baik itu sinyal/atau yang lain maka kita bisa mengeceknya lewat kode rahasia berikut ini :
Call Diverting
All
To Activate: * * 21 * NUMBER # [SEND]
To Cancel: # # 21 # [SEND]
To Check: * # 21 # [SEND]
No Answer
To Activate: * * 61 * NUMBER # [SEND]
To Cancel: # # 61 # [SEND]
To Check: * # 61 # [SEND]
Unreachable
To Activate: * * 62 * NUMBER # [SEND]
To Cancel: # # 62 # [SEND]
To Check: * # 62 # [SEND]
Busy
To Activate: * * 67 * NUMBER # [SEND]
To Cancel: # # 67 # [SEND]
To Check: * # 67 # [SEND]
To Cancel All Call Forwarding # # 002 # [SEND]
Diverting Data Calls
All
To Activate: * * 21 * NUMBER * 25 # [SEND]
To Cancel: # # 21 # * 25 [SEND]
To Check Status: * # 21 # * 25 # [SEND]
No Answer
To Activate: * * 61 * NUMBER * 25 # [SEND]
To Cancel: # # 61 * 25 # [SEND]
To Check Status: * # 61 # * 25 # [SEND]
Unreachable
To Activate: * * 62 * NUMBER * 25 # [SEND]
To Cancel: # # 62 # * 25 # [SEND]
To Check Status: * # 62 # * 25 # [SEND]
Busy
To Activate: * * 67 * NUMBER * 25 # [SEND]
To Cancel: # # 67 # * 25 # [SEND]
To Check Status: * # 67 # * 24 # [SEND]
Diverting Fax Calls
All
To Activate: * * 21 * NUMBER * 13 #[SEND]
To Cancel: # # 21 # * 13 # [SEND]
To Check Status: * # 21 # * 13 # [SEND]
No Answer
To Activate: * * 61 * NUMBER * 13 # [SEND]
To Cancel: # # 61 * 13 # [SEND]
To Check Status: * # 61 # * 13 # [SEND]
Unreachable
To Activate: * * 62 * NUMBER * 13 # [SEND]
To Cancel: # # 62 # * 13 # [SEND]
To Check Status: * # 62 # * 13 # [SEND]
Busy
To Activate: * * 67 * NUMBER * 13 # [SEND]
To Cancel: # # 67 # * 13 # [SEND]
To Check Status: * # 67 # * 13 #[SEND]
Call Barring
Before you can activate these barring services you will need a barring code from your service provider. Call Barring can not be activated if Call Forwarding diverts are already in use.
All Calls
To Activate: * 330 * BARRING CODE # [SEND]
To Cancel: # 330 * BARRING CODE # [SEND]
To Check: * # 330 # [SEND]
All Outgoing Calls
To Activate: * 333 * BARRING CODE # [SEND]
To Cancel: # 333 * BARRING CODE # [SEND]
To Check: * # 333 # [SEND]
All Incoming Calls
To Activate: * 353 * BARRING CODE # [SEND]
To Cancel: # 353 * BARRING CODE # [SEND]
To Check: * # 353 # [SEND]
All Outgoing Calls
To Activate: * 33 * BARRING CODE# [SEND]
To Cancel: # 33 * BARRING CODE # [SEND]
To Check: * # 33 # [SEND]
All Outgoing International Calls
To Activate: * 331 * BARRING CODE# [SEND]
To Cancel: # 331 * BARRING CODE # [SEND]
To Check: * # 331 # [SEND]
All Outgoing International Calls Except To Home Country
To Activate: * 332 * BARRING CODE# [SEND]
To Cancel: # 332 * BARRING CODE # [SEND]
To Check: * # 332 # [SEND]
All Incoming Calls
To Activate: * 35 * BARRING CODE # [SEND]
To Cancel: # 35 * BARRING CODE # [SEND]
To Check: * # 35 # [SEND]
All Incoming Calls When Outside Home Country
To Activate: * 351 * BARRING CODE # [SEND]
To Cancel: # 351 * BARRING CODE # [SEND]
To Check: * # 351 # [SEND]
Canceling All Call Barring # 330 * BARRING CODE # [SEND]
Call Waiting
To Activate: * 43 # [SEND]
To Deactivate: # 43 # [SEND]
To Check: * # 43 # [SEND]
Calling Line Identity
Outgoing
To Activate: * 31 # [SEND]
To Deactivate: # 31 # [SEND]
To Check: * # 31 # [SEND]
Incoming
To Activate: * 30 # [SEND]
To Deactivate: # 30 # [SEND
mudah-mudahan dapat bermanfaat.....
selamat mencoba......

A. DEAD OF ALL (MATI TOTAL) – (3300, 3315, 3330, 3350)
Analisa (Trouble Shooting):
1. Batt rusak (voltase normal 3,6 V)
2. Connector batt rusak
3. Face batt (permukaan saat batt dihubungkan ke connector dengan voltase 3,0 V)
4. Putus jalur antara V batt ke power supply (IC cont)
5. IC program rusak
6. Cek program rusak
7. Putus hubungan antara switch ke C cont
8. Software rusak


Solusi / Servise & Repair:
1. Pastikan tegangan batt minimal 3,6 V
2. Pastikan tegangan melewati connector saat batt dihubungkan ke connector dengan voltase 3,0 V
3. Pastikan permukaan connector batt bersih dari kotoran
4. Periksa jalur antara V batt ke C cont (permukaan V batt (+) dan capasitor nilai 3,3 μf) harus hubung, cek Vrx, Vtx
5. Cek IC CPU, flash, RAM
6. Cek switch on/off pastikan dalam kondisi bagus
7. Cek hubungan switch on/off ke C cont, jalur dari R 422 (orr) menuju R 244 (10 KΩ)
8. Di flash (di softwarekan)


B. TIDAK ADA SINYAL (3310, 3315, 3330, 3350, 8210, 8250, 3610, 2100, 3210, 5110, 6110, 5510, 8810, 8850)
Analisa (Trouble Shooting):
1. Kontak antena dan permukaan connector
2. Bagian Rx (Receiver) sinyal rusak
3. Bagian Tx (Transmitter) sinyal rusak
4. Tegangan ke Tx, Rx tidak ada

Solusi / Servise & Repair:
1. Pastikan bagian Rx antara connector & antena baik
2. Cek bagian Rx (penerima sinyal) switch Ant – HAGAR – Switch Alost – VCO – Hagar – C cont
3. Cek bagian Rx (Receiver) sinyal PA – VCO – HAGAR - Switch Ant
4. Cek tegangan VRx, VTx pada power supply IC cont

Note:
*Untuk memastikan yang trouble Tx/Rx coba disetting dahulu (pengaturan – pengaturan telp. – manual – tunggu : berarti bagian Tx
*Sebelum pergantian komponen usahakan dipanasi dahulu komponen yang terkait


C. LCD BLANK – LAYAR TIDAK TAMPAK GAMBAR (SEMUA JENIS NOKIA)
Analisa (Trouble Shooting):
1. Rubber connector rusak
2. LCD rusak
3. Software
4. Jalur Voltse LCD putus

Solusi / Servise & Repair:
1. Bersihkan atau ganti connector
2. *Pada LED orisinil ada dua buah kapasitor coba disolder ulang (dengan sangat hati – hati!)
3. Software tekena gejala : apabila di on kan atau dinyalakan ada gambar blok hitam kemudian tidak tampil gambar lagi


D. LCD SCREEN TOO CONTRAST (LCD LAYAR TERLALU KONTRAS – BLOK HITAM) (SEMUA JENIS NOKIA)
Analisa (Trouble Shooting):
1. Software
2. LCD rusak

Solusi / Servise & Repair:
1. Kurangi kontrasnya dengan disoftwarekan
2. Ganti LED


E. LCD PICTURE THE DISORDERLY (LCD GAMBARNYA ACAK – ACAKAN) – (SEMUA JENIS NOKIA)
Analisa (Trouble Shooting):
1. Rubber rusak
2. LCD rusak

Solusi / Servise & Repair:
1. Ganti rubber yang baru
2. Ganti LCD yang baru


F. NO CHARGE (TIDAK BISA DICAS) – (3310, 3330, 3350, 8210, 8250, 3610, 2100, 3210, 5110)
Analisa (Trouble Shooting):
1. Layar tidak menampilkan indikator cas
2. Layar menampilkan indikator cas tetapi tidak mengisi
3. HP dalam kondisi mati hanya menampilkan indikator batt tetapi indikator cas tidak jalan, kemudian diikuti suara (theet) tanda tidak mengisi
4. Tidak ada indikator cas saat melakukan pengecasan

Solusi / Servise & Repair:
1. - Cek ( cas charger out) V out, tegangan tanda 5 – 8 V
- Cek connector cas
- Cek fuse (sekering)
- Cek jalur dari voltase pada charger – IC cas
2. Cek resistor atau jalur antara R 204 – voltase batt (+)
3. CPU rusak
4. Cek jalur kapasitor C 200 / 201 – resistor R 200 mungkin putus

Note:
* Apabila pada saat posisi off melakukan pengecasan, pada layar muncul tampilan batt yang kadang tampak dan kadang tidak tampak
* Gejala ini menujukan adanya connector batt yang tidak tersambung, periksa dengan teliti connector batterainya


G. DERING MATI (33_ _ , 82_ _ , 3210, 2100, 3610)
Analisa (Trouble Shooting):
1. Buzzer mati
2. Jalur mati
3. IC yang menggunakan interface rusak

Solusi / Servise & Repair:
1. Cek buzzer dengan dihubung singkatkan dengan tegangan DC 3V
2. Cek dengan jalur kaki 5 dari kanan atas menuju buzzer (+) harus hubung
3. Ganti IC yang menggunakan interface