Samsung Galaxy tab GT-P7500 - Troubleshooting procedure - Power on problem and troubleshooting - Battery Charging problem

Samsung Galaxy  GT-P7500 troubleshooting 

Abnormal charging part

Check C514 whether voltage reading is greater than 5V

Check the TA and the DLC (TA or DLC may not be connected properly)

Check C510 whether voltage reading is greater than 5V

Check U507 chip (U507_OVP chip may not work)

Check C749 whether voltage reading is greater than 4.2V

Check U704 chip (U704 chip may not work at room temperature)

Check battery voltage is change when TA is connected

Check U704 chip (U704 chip may not work)

Check C743 whether voltage is change when TA is connected

Check U704 chip (U704 chip may not work)

Microphone Part

Check main microphone function
in voice call receiver mode

Check the voltage at
C406 = 2.8V

Resolder or replace U404

Check component soldering
statuses of C426, C427

Resolder or replace C426, C427

Speaker Part

Check the signals on R427,R428,R338, R338

Resolder or replace U404

Replace the speaker module

BT/WIFI

BT/WiFi is not working

Check BT or WiFi function

Enable BT or WiFi Function

Check the Voltage on C260 = 1.8V

Check AP PMIC(U703)

Check 37.4MHz Clock at R213

Check OSC202

Check the Voltage on L214 = 1.5V

Resolder or change L214

Check the Status of C282, ANT202

Resolder or Replace C282, ANT202

Resolder or Replace U204

Power On does not work

Check "Power on" by power cable with jig-on

Check the switch circuit, FET gate voltage, FET voltage

Check the 30pin to 50pin FPCB(SLC500), Wrong assembly or Wrong connection.

Check the Battery Voltage is more than 3.6V

Charge the Battery (Battery power is low)

Check U703(PMIC) and Power on voltage(C727≥1.2V, C734 ≥1.2V, C730≥1.8V, C725≥ 1.8V, C728≥1.1V, C723≥3.3V, C720≥2.85V)

Check U703. Change the problem point. (short, open, crack, etc.)
If PMIC has problem, change U703

Check U702(_RESET). this pin has to go high level(about 2V),and to go low level after 480ms
Check U6006(A1,Y1). If you push the power on button ,, A1,Y1 has to go high level.

Check the Clock at OSC700(C718) that frequency is 32K

Check the clock generation circuit (related to OSC700)

check the initial operation

TSP

Touch Screen does not work

Check TSP Connector on Main PBA

Reconnect the SLC1000

U1004 Pin64 = 3.3V(C1033) and Pin8 = 1.8V(C1029)

Resolder or Replace U1004 U1001,1002,1003 Pin A1 = 3.3V(C1000,C1006,C1012)

Resolder or Replace U1001,1002,1003

Check the I2C signal of

Sensor IC(R6050, R6051)

Resolder R6050, R6051

Replace TSP Module

3 MEGA PIX CAM

"Camera" function does not work

Check the Camera connector on Main PBA

Reconnect the HDC900

Check the voltage
C902 = 1.2V
C901 = 2.8V
C913 = 1.8V
C900 = 1.8V

Resolder U900,R900,R902,L900
Resolder U901
Resolder U902
Replace the PBA

Check R903 is 24MHz

Resolder R903 Replace the PBA

Check the I2C line TP902 & TP903 = HIGH

Resolder R6044, R6045 Replace the PBA

Check F900 is OK

Resolder F900 Replace the PBA

Replace the camera module

Initial Failure

CP_RST(R320), PDA_ACTIVE(R6067) >= 1.8V(HIGH)

Check UCP6000 (short, crack, etc.)

CP_ON(TP_CP_ON), PHONE_ACTIVE(TP6024)>= 1.8V(HIGH)

Check UCP300 (short, crack, etc.)

AP_nRST(U703_pin #G8,TP702) "low -> high"?

Replace OSC 300 and OSC700

There are 26MHz wave forms at OSC600(C6082) and 26MHz wave forms at OSC100(C150)

Replace OSC600 and OSC100

LCD display OK?

Check the LCD part(short, crack, etc.)

Sound is OK?

Check the Audio Part(short, crack, etc.)

LCD

LCD is still off after PWR ON

Check the connection of SLC800

Reconnect the SLC800

Check the C818 and High(18V)

Check the Backlight Driver IC(U805)

Check C821 = 1.8V, C823 = 3.3V, C833= 1.2V

Check the LDO(802) DC-DC(U803) DC-DC(U804)

Check the signal DISPLAY_PCLK(TP809) LCD_D(0)(TP801)

Check the IC UCP6000

Check the signal IDISPLAY_PCLK(TP806) LCD_F(0)(TP800)

Check the freq of C813(19.2MHz)

Replace or resolder OSC800

Check the U801

Check C800 = 1.8V, C801 = 3.3V

Check the IC U800

Replace LCD Module