Tuesday, March 22, 2016

Samsung galaxy note GT-N7000 – Troubleshooting – Step by step Instruction to troubleshoot problems – Mobiles and smart phones repair and service

Contents of this article 

  • Phone is not powering ON 
  • Showing inset SIM and NO service 
  • Charging is not properly functioning 
  • FM radio is not working 

Samsung galaxy note GT-N7000

TROUBLESHOOTING 
Service Tips :Most of the mobile phones problems can be recover by resoling components 
Cell-phone can't power on.
Check the Battery Voltage. Is it more than 3.6V?
Charging the battery by TA. If its voltage level is extremely low(under 3.0V), Change the battery.
Power-on the phone and check the power-on sound, display and motor vibration. Are they ok?
Change the SPK module. Change Front LCD Ass'y. Change the Vibration Motor module.
Check the TAC302 (soldering crack, open, etc)
Change the TAC302(Power-key) And retry to the power-on operation.
Check the U602 output voltage (C633 = 2.0V, C655 = 1.1V)
If the output voltage is not satisfied with normal condition, Change the U602. Each voltage level has ±10% margin.
Check the TP406 output signal (AP_PS_HOLD(TP) = 2.8V)
If the output voltage is not satisfied with normal condition, Change the U602. Each voltage level has ±10% margin.
Check the Clock OSC600(TP207) Is that frequency 32.768Khz?
Change the OSC600. If OSC600 does not still work, Change the U602 This problem is internal oscillator of U602. Test condition (Oscilloscope setting) : 20.0us.div (time division)
Initial Failure
Re-download SW the cell-phone.
Check the AP Reset AP_N_RST_IN(R608) = 2.8V(High)
Check the U602 and R608 (crack, open, etc.)
Check the Frequency, waveforms using oscillator. 32.768KHz : OSC600(TP207), 24Mhz : OSC400(R413)
Check the OSC600, OSC400 and R413. (Crack, open etc.) Check the output clock waveforms and frequency. Test condition (Oscilloscope setting) : 20.0us.div (time division)
Change UCP400,U602
No service
Check memu setting
Menu
> applications > setting > wireless and network > mobile networks > network mode > setting is auto mode ?
Menu > Phone > Keypad > *#1234# > check Phone version > PHONE : N7000XXXX PHONE : unknown
Check the connection of RF coaxial cable
Check the CP_VSD1,CP_VSD2_1.8V CP_VSD1 (C350) =0.9~1.4V CP_VSD2_1.8V (C351) = 1.8V
Replace the U300
Check VREF VREF ( C356 ) = 600mV
Replace the U300
Change the board
Insert SIM card
Check the Pin Soldering of SIM300
Resoldering and recheck
Check the SIM Voltage. (R312) >= 1.8 or 3.0?
Change to the new SIM card. If it doesn`t still work SIM card after changing the SIM card, Check the UCP300 (Crack etc)
Charging Part
Charging Sequence Start Vin = 5V
Check U603 = 5V(proximetely), or may not connected TA / USB
Check the R619
Resolder and Replace R619
Check the SUB PBA conn. HDC301.
Re-connect HDC301. Or change the SUB PBA.
Check the SUB PBA conn. HDC301.
Re-connect HDC301. Or change the SUB PBA.
Battery is Charging?
Resolder or Replace U607
Microphone Part (Main MIC)
Check main microphone function in voice call receiver mode or in Voice Recording mode
Check Sub-PCB module where main MIC is placed for any damage (Tear in FPC, etc)
Change the Sub-PCB module
Check the voltage at C244 = 2.8V
Resolder or replace U205
Check component soldering statuses of C224, C226
Resolder or replace C224, C226
Resolder or replace U202
Microphone Part (Sub MIC)
Check Sub microphone function in voice call loudSPK mode or in camcording mode
Check RCV-Earjack module where Sub MIC is placed for any damage (Tear in FPC, etc)
Resolder Sub MIC(MIC200)
Check the voltage at C254 = 2.8V
Resolder or replace U208
Check component soldering statuses of C231, C234
Resolder or replace C231, C234
Resolder or replace U202
Speaker Part
Check speaker function. Play MP3 with maximum volume level.
Check the connection of HDC301
Reconnect HDC301
Check the signals on HDC301 Pin Nr. 4,6 / 8/10
Resolder or replace U202
Replace the Sub PCB module
Replace the SPK module
Receiver Part
Check receiver function in voice call receiver mode.
Check the connection of HDC200
Reconnect HDC200
Check RCV-Earjack module where RCV's placed for any damage (Tear in FPC, etc)
Replace the RCV-Earjack module
Check the signals on R229, R231,L210,L212 C286,C287,V203,V204
Resolder or replace U202
BT/WIFI
Check BT or WiFi function ON
Enable BT or WiFi Function
Check the Voltage on C221 = 2.8V
Check the U602(crack, open, damaged, etc.)
Check 37.4MHz Clock at R206
Check the OSC200(crack, open, etc.)
Check the Voltage on L204 = 1.5V
Resolder or change the L204
Check the Status of C218,C219,C220,ANT200
Resolder or Replace C218,C219,C22,ANT200
Resolder or Replace U204
FM Radio is not working
Check the Connection of HDC200
Connect Earjack Ass'y correctly to HDC200
Check the Status of C281,L200,L201
Resolder or Replace C281,L200,L201
Check the Voltage on C211 = 2.8V, C200 = 1.8V
Check the U602(crack, open, damaged, etc.)
Check Audio signal at C236,C237
Resolder or Replace C236,C237 Replace U201 if C236,C237 is well connected
Check Audio signal at R229,R231,L210,L212
Resolder or Replace R229,R231,L210,L212
Resolder or Replace U202
GPS is not working
Check GPS function ON
Enable GPS Function in the setting.
Check the Voltage on C1085 = 2.8V, C1089=1.8V
Check AP PMIC(U602) (short, open, crack, etc.)
Check 26MHz Clock at OSC1001 PIN4
Check OSC1001(short, open, crack, etc.)
Check the voltage on C1078=2.8V & C1073 > 1.8V
Check AP PMIC(U602) & U1011 (short, open, crack, etc.)
Check the Antenna connect ANT1000
1. Resolder or Replace ANT1000
2. Replace Rear case
OLED
LCD is still off after PWR ON
Check the connection of HDC 501
Reconnect the HDC 501
Check VCC_3.1V_LCD = 3.1V(C650)
Resolder or Replace the PMIC(U602)
VCC_2.2V_PDA = 2.2 ~2.15V(C512)
Resolder or Replace the U504
Check ELVDD_4.6V = 4.6V(C503), ELVSS_-4.9V = 3. 0~4.4V(C502)
Resoldering L505, L508
Replace LCD Module
8Megapixel CAM
Check the Camera connector on Main PBA
Reconnect the SLC500
Check Cam F/W Ver. Is lastest Version, [CAM Ver = Phone Ver ?] (*#34971539#, 1st)
Update Cam F/W write (*#34971539#, 2nd)
Check the voltage
C631 = 1.2V,
C521 = 1.2V
C505 = 2.8V
C530 = 2.8V
C508 = 1.5V
C649 = 1.8V
C654 = 1.8V
C645 = 1.8V
Resolder L603, C631
Resolder U506, C521, C522
Resolder U501, C504, C505
Resolder U507. C529, C530
Resolder U502, C508, C511
Resolder C649
Resolder C654
Resolder C645
Replace the PBA
Check R440 is 24MHz
Resolder R440. Replace the PBA.
Check L500, L501 is OK
Resolder L500, L501
Replace the camera module