820-3437-B Thermal sensor problem

macfix

New member
Hello Everybody

Working on liquid damaged around SMC 820-3437-b. Come with no power problem . After reball SMC power come back and machine power and OS loading ok but now fan problem and slow.

Reballed 2 times but nothing changed. SMC log at bottom.

Tried also I/O board and trackpad but nothing change where can i check next step?



12/31/15 17:15:10] SMC: 0x0 (test #1) - SMC Critical Sensor Check Test

- Checks if the SMC reports any errors on critical sensors.

[17:15:10] ERROR -- 1 [The SMC reports an error on one or more critical sensors.] -- TEST FAILED

[12/31/15 17:15:10] SMC: 0x0 (test #7) - SMC EPM Flash Check Test

- Check to ensure that UV and CV EPM blocks are programmed.

[17:15:11] Test Passed

[12/31/15 17:15:11] SMC: 0x0 (test #8) - SMC Power Balancing check

- Check to ensure that Power Balancing is enabled.

[17:15:11] Test Passed

[12/31/15 17:15:11] SMC: 0x0 (test #9) - SMC App Code mode check

- Check to ensure that SMC in App code mode.

[17:15:12] Test Passed

[12/31/15 17:15:12] SMC: 0x0 (test #17) - Sensor Alert TC0P

- This test verifies that the TCOP hardware alert signals to the SMC

[17:15:14] ERROR - -12016 [Error returned by system function.] -- TEST FAILED

[12/31/15 17:15:14] Current (IC0R) -- Chipset 0 INA Highside (test #1) - Sensor Reads Within Operating Range

- Check to ensure that sensor reads within operating range.

[12/31/15 17:15:21] Temperature (TB2T) -- Battery Thermal Diode 2 (test #1) - Sensor Reads Within Operating Range

- Check to ensure that sensor reads within operating range.

[17:15:21] Test Passed

[12/31/15 17:15:21] Temperature (TC0P) -- CPU Proximity (test #1) - Sensor Reads Within Operating Range

- Check to ensure that sensor reads within operating range.

[17:15:22] ERROR -- 1 [Unable to read sensor] -- TEST FAILED

[12/31/15 17:15:22] Temperature (TCHP) -- Charger Proximity (test #1) - Sensor Reads Within Operating Range

- Check to ensure that sensor reads within operating range.

[17:15:22] ERROR -- 1 [Unable to read sensor] -- TEST FAILED

[12/31/15 17:15:22] Temperature (TCXC) -- CPU Core PECI (test #1) - Sensor Reads Within Operating Range

- Check to ensure that sensor reads within operating range.

[12/31/15 17:15:24] Temperature (TS2P) -- S2 Camera Proximity (test #1) - Sensor Reads Within Operating Range

- Check to ensure that sensor reads within operating range.

[17:15:24] ERROR -- 1 [Unable to read sensor] -- TEST FAILED

[12/31/15 17:15:24] Temperature (TW0P) -- AirPort Proximity (test #1) - Sensor Reads Within Operating Range

- Check to ensure that sensor reads within operating range.

[17:15:24] Test Passed

[12/31/15 17:15:25] Temperature (Ta0P) -- Input Air Flow (test #1) - Sensor Reads Within Operating Range

- Check to ensure that sensor reads within operating range.

[17:15:25] ERROR -- 1 [Unable to read sensor] -- TEST FAILED

[12/31/15 17:15:25] Temperature (Th1H) -- Fin Stack (test #1) - Sensor Reads Within Operating Range


[12/31/15 17:15:28] Temperature (TC0P) -- CPU Proximity (test #11) - Extended Sensor Flat Line Test

- Checks that the Sensor changes value i.e. not stuck, with longer time allowance for change (5 mins).

[17:15:28] ERROR - -13005 [The SMC can not read this sensor] -- TEST FAILED

[12/31/15 17:15:29] Temperature (TCHP) -- Charger Proximity (test #11) - Extended Sensor Flat Line Test

- Checks that the Sensor changes value i.e. not stuck, with longer time allowance for change (5 mins).

[17:15:29] ERROR - -13005 [The SMC can not read this sensor] -- TEST FAILED

[12/31/15 17:15:44] Temperature (TS2P) -- S2 Camera Proximity (test #11) - Extended Sensor Flat Line Test

- Checks that the Sensor changes value i.e. not stuck, with longer time allowance for change (5 mins).

[17:15:45] ERROR - -13005 [The SMC can not read this sensor] -- TEST FAILED

[12/31/15 17:15:45] Temperature (TW0P) -- AirPort Proximity (test #11) - Extended Sensor Flat Line Test

- Checks that the Sensor changes value i.e. not stuck, with longer time allowance for change (5 mins).

[17:15:50] Test Passed

[12/31/15 17:15:50] Temperature (Ta0P) -- Input Air Flow (test #11) - Extended Sensor Flat Line Test

- Checks that the Sensor changes value i.e. not stuck, with longer time allowance for change (5 mins).

[17:15:51] ERROR - -13005 [The SMC can not read this sensor] -- TEST FAILED

[12/31/15 17:15:51] Temperature (Th1H) -- Fin Stack (test #11) - Extended Sensor Flat Line Test

- Checks that the Sensor changes value i.e. not stuck, with longer time allowance for change (5 mins).

[17:16:01] Test Passed

[12/31/15 17:17:06] Thermal Interface: Processor:processor0 (test #35) - TIM Test 0 Percent Guard Band

- Check that CPU heatsink is properly attached, using product spec theta dh +0 percent guard band.

[17:17:10] ERROR -- 8 [Plimit not as expected.] -- TEST FAILED

[12/31/15 17:17:11] Thermal Interface: Processor:processor0 (test #36) - Extended TIM Test 0 Percent Guard Band

- Check that CPU heatsink is properly attached, using product spec theta dh +0 percent guard band.

[17:17:15] ERROR -- 8 [Plimit not as expected.] -- TEST FAILED
 

aprendiz

Moderator
Check pull up resistors R5360-R5361 and voltage on pin 2 from both resistors, also check for corrosion on J4002, U5800 and U5620, if everything is fine i would say SMC is bad....
 

macfix

New member
Thanks for answer Duke and aprendiz,
Yes you are right when checked SMBUS_SMC_1_S0_SCL line voltage is drop 0.6V ( must be 3.4 v ) Checked R5361 fine also replaced.
When checked line not short a ground ( checking voltage when board is pulled out with out lcd keyboard etc. , when machine turn power on SMBUS_SMC_1_S0_SCL voltage is ok 3.4 v but mouse light is turned on , so machine started. voltage is pull down 0.6v ) Checked line witch component connected every thing is looking good.

Last step cut SMBUS_SMC_1_S0_SCL line to SMC connection voltage is normal 3.4V .

Also replaced SMC same issue :(

I cant understand why SMBUS_SMC_1_S0_SCL voltage is pulling down when connected SMC.

note: Sorry for bad english.... I hope described correctly.
 
Last edited:

macfix

New member
Red proble at ground 405 shows both side. I have known good board measure it 395 shows i think its not important difference.
 

macfix

New member
Red proble at ground 405 shows both side. I have known good board measure it 395 shows i think its not important difference.
 
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