Wednesday, March 23, 2016

Samsung Galaxy Tab GT P1000 – Troubleshooting – Step by step instruction troubleshooting – Insert sim - No power – Charger failure – initialization failure – Mobiles and smartphones repair and service

Category: Mobiles and Smartphones repair and Service 

Contents of this article 

  • Power ON doe snot working 
  • Insert SIM problem
  • Microphone problem 

Samsung Galaxy Tab GT P1000

TROUBLESHOOTING 
Power On does not work
Check the Battery Voltage is more than 3.6V
Change the Battery (Battery power is low)
Check "Power on" by power cable with jig-on
Check the switch circuit, FET gate voltage, FET voltage (if FET has some problem, it is to be replaced)
Check U700(PMIC) and Power on voltage(C719>1.2V, C720>1. 2V, C721>1.8V, C723>1.2V, C730>2.8V)
Change the problem point (short, open, crack, etc.) And if PMIC has problem, change U700
Check the Clock at OSC700(C740) that frequency is 32K
Check the clock generation circuit related to OSC700 (short, open, crack, etc.) if OSC700 has problem, change OSC700
check the initial operation
Initial Failure
The pin #A3, B3 of U301 = swing property 1.8V and 0V? The pin A1, B1 of U301 = swing property 2.8V and 0V?
Check U301 and U601 and related parts (short, crack, etc.)
AP_PS_HOLD(U700_pin #D6) and AP_N_RST_IN(R706) = "low -> high"?
Check U700(crack, open, etc.) (if U700 has some problem, it is to be replaced)
There is 32.768KHz wave forms at OSC300(C338) and OSC700(C740)
Replace OSC 300 and OSC700
R339 >= 1.8V?
Check U601 and related parts(short, crack, etc.) (if U601 has some problem, it is to be replaced)
There are 24MHz wave forms at OSC600(C621) and 26MHz wave forms at OSC100(C128)
Replace OSC600 and OSC100
LCD display OK?
Check the LCD part(short, crack, etc.)
Sound is OK?
Check the Audio Part(short, crack, etc.)
Abnormal charging
Check IFC500 pin #7(or #8) whether voltage reading is greater than 5V and current reading is greater than 1.16A
Check the TA and the DLC (TA or DLC may not be connected properly)
Check U518 pin #6 or #7 whether voltage reading is greater than 5V
Check U518 chip(crack, open, etc.) (if U518 has some problem, it is to be replaced)
Check U702 output pin C773 whether voltage reading is greater than 4.2V
Check U702 chip(crack, open, etc.) (if U702 has some problem, it is to be replaced)
Check battery voltage is change when TA is connected
Check U702 chip(crack, open, etc.) (if U702 has some problem, it is to be replaced)
Check U702 output pin C793 whether voltage is change when TA is connected
Check U702 chip(crack, open, etc.) (if U702 has some problem, it is to be replaced)
Check U501 output pin C503 whether voltage reading is greater than 5V
Check U501 chip(crack, open, etc.) (if U501 has some problem, it is to be replaced)
Insert SIM card
Check the Pin Soldering of SIM300
Resoldering and recheck
Check the detection & No. (It will be rebooting) 2.8V)
Change to the new SIM card
Check the Voltage of SIM (R345 : 2.8V, R311 : 2.8V)
Check the voltage from PMIC and CP. Unless power, Change the PBA
Microphone Part
Check main microphone function in voice call receiver mode
Check the MIC or MIC_FPCB (short, crack, etc)
Change MIC or MIC_FPCB
Check the voltage at C407 = 2.1V
Resolder or replace U402
Check component soldering statuses of C434, C435
Resolder or replace C434, C435
Speaker Part
Check speaker function. Play MP3 with maximum volume level.
Check the signals on L410, L411, L412, L413
Resolder or replace UCD400
Replace the speaker module
BT/WIFI
BT/WiFi is not working
Check BT or WiFi function ON
Enable BT or WiFi Function
Check the Voltage on C220 = 2.8V
Check AP PMIC(700)(crack, open, etc.) (if PMIC has some problem, it is to be replaced)
Check 26MHz Clock at R208
Check OSC201(crack, open, etc.) (if OSC201 has some problem, it is to be replaced)
Check the Voltage on L213 = 1.5V
Resolder or change L213
Check the Status of C296, ANT202
Resolder or Replace C296, ANT202
Resolder or Replace U202
LCD
LCD is still off after PWR ON
Check the connection of HDC801
Reconnect the HDC801
Check the R845 short and High(1.8V)
Resolder R845 and reinstall binary
Check the soldering status of L804
Resolder L804
Check C808 = 1.8V, C806 = 3.3V
Check the PMU(crack, open, etc.) (if PMU has some problem, it is to be replaced)
Check C837 = 3.3V,
C832 = 1.2V,
C821 = 1.8V
3.3V ª resolder or change U807
1.2V ª resolder or change U804
1.8V ª check the PMU
Check the signal of
CMC_B(0), CMC_G(3),
CMC_R(7)
Check the freq of
OSC800(19.2MHz)
Replace or resolder U808
Replace LCD Module
3M CAM
"Camera" function does not work
Check the Camera connector on Main PBA
Reconnect the HDC802, HDC803
Check the voltage
C825 = 2.8V,
C824 = 1.2V
C826 = 2.8V
Check the HDC802, HDC803 Replace U700 or change PBA
Check R819 is 24MHz
Check U601 related to 24MHz
Check R818 is 54MHz
Check the Pin 21 of HDC802 (Whether the Pin is Short with Pin 19, 20 or not)
Replace the camera module