MacBook Pro 2.66Ghz mid2009 MB 820-2523-b to repair

[keeney123]

Re: MacBook Pro 2.66Ghz mid2009 MB 820-2523-b to repair

Yes, that is the question. Why did Q9806 go bad? I asked Hijo to measure the output of Q9806 to ground to make sure it is not shorted as perhaps one of the ICs that this goes directly too has shorted out. Or Q9806 just gave up the ghost and nothing else is bad. I ask Hijo to turn off the unit and measure using the black/negative probe on the output of Q9806 and the red/positive probe on gnd. so as not to measure through the protection resistor of Q9806.

[Hijo]

Re: MacBook Pro 2.66Ghz mid2009 MB 820-2523-b to repair

voltage on r8793 ?

(With power on)
R8793 Have 0.00V on Pin1
(Without power on)
R8793 have 1071 Ohms and (820 to stabilize at) 1255uF

I ask Hijo to turn off the unit and measure using the black/negative probe on the output of Q9806 and the red/positive probe on gnd. so as not to measure through the protection resistor of Q9806.

(on position 2000 on ohmmètre (200/2000/20K/200K/2000K))
for Q9806 I have
377 Ohms on Pin: 1,2,5,6 (PPBUS_S0_LCDBKLT_PWR)
378 Ohms on Pin: 4 (PPBUS_S0_LCDBKLT_FUSED)
0 Ohms on pin: 3 (PPBUS_S0_LCDBKLT_EN_DIV)

Can you confirm that i should take measure without power for Ohms ?


Thanks you for your investigation, it's very appreciated


Can you advise me for a solder station ?

I have seen this one but it's little bit too expensive for begining i think..

Thank u for your explanation Keeney, i understand little bit more how that works !

[Hijo]

Re: MacBook Pro 2.66Ghz mid2009 MB 820-2523-b to repair

For have a better understanding, I'm gonna retake all the measures here above.

Test Probes on Pin1, Part...: (Magsafe connected without battery, LogicBoard don't run)

"G3Hot" (Always-Present) Rails
PPBUS_G3H: 12.61V on Probe 1444
.-PP3V3_S5: 3.34V on Probe 1102
...-LPCPLUS_GPIO: 3.18V on Probe 622 (J5100, Pin30)
.-PPBUS_S0_LCDBKLT_FUSED: 12.6V Probe:1157
.-LCD_BKLT_EN: 0.00V on Probe 209
.-BKLT_PLT_RST_L: 0.00V on Probe 170

PPBUS_CPU_IMVP_ISNS: 12.63V on Probe 1504
PPDCIN_G3H: 16.64V on Probe 569
.-PPDCIN_S5_P3V42G3H: 16.50V on Probe 1531
...-PPVIN_G3H_P3V42G3H: 15.79V on Probe 1532
.....-P3V42G3H_FB: 1.25V on Probe 1540
PP3V42_G3H: 3.44V on Probe 860
.-PP1V2R1V05_S5: 1.06V on Probe 929
...-PP1V2R1V05_ENET: 0.00V on Probe 1461
(cpu out)PM_SLP_RMGT_L: 0.00V on Probe 132 (580uF to 1601uF without magsafe)
(cpu out)PM_SLP_S3_L: 0.00V on Probe: 1162
(cpu out)PM_SLP_S4_L: 0.00V on Probe: 1528

Others check:
S0_PWR_PGOOD: 0.00V on Probe 228
P1V05ENET_EN_L: 3.12V on Probe 1460
MCP_THMDIODE_P: 0.00V on Probe 779 (1670 to 1436uF WoM (Without Magsafe))
MCP_SPKR: 0.00V on Probe 1468 (1440uF WoM)
VREFMRGN_FRAMEBUF: 0.00V on Probe 1549(0uF, 0ohm WoM)
VREFMRGN_DQ_SODIMM: 0.00V on Probe 1545 (0uF, 0ohm WoM)


Components checks:
Q3840 Pin1: 0.00V (P1V05ENET_SS)
...........Pin2: 0.00V (PP1V2R1V05_ENET)
...........Pin3: 1.06V (PP1V2R1V05_S5)
Q9807: Pin2: 0.00V (BKLT_PLT_RST_L)
...........Pin3: 8.70V (PPBUS_S0_LCDBKLT_EN_L)
...........Pin4: 0.01V <-> 0.02V ( BKLT_EN_L)
...........Pin5: 0.00V (LCD_BKLT_EN)
...........Pin6: 0.01V <-> 0.02V ( BKLT_EN_L)
Q9806: (ROG(Red On Ground))
...........Pin 1,2,5,6: 377 Ohms (PPBUS_S0_LCDBKLT_PWR)
...........Pin 4: 378 Ohms (PPBUS_S0_LCDBKLT_FUSED)
...........Pin 3: 0 Ohms (PPBUS_S0_LCDBKLT_EN_DIV)

Coils checks (Run Off):
L9701: Pin1: 0.00V, Pin2: 0.00V
L7260: Pin1: 3.34V, Pin2: 3.34V
L7220: Pin1: 0.00V, Pin2: 0.00V
L9560: Pin1: 0.00V, Pin2: 0.00V
L9510: Pin1: 0.00V, Pin2: 0.00V
L7030: Pin1: 12.62V, Pin2: 12.32V, Pin3: 0.00V
L8920: Pin1: 0.00V, Pin2: 0.00V
L7770: Pin1: 1.06V, Pin2: 1.06V
L7560: Pin1: 0.00V, Pin2: 0.00V
L7330: Pin1: 0.00V, Pin2: 0.00V
L6995: Pin1: 3.4V, Pin2: 3.4V
L7660: Pin1: 0.00V, Pin2: 0.00V
L7100: Pin1: 0.00V, Pin2: 0.00V
L7101: Pin1: 0.00V, Pin2: 0.00V

Coils checks (Run On):
L9701: Pin1: 0.00V, Pin2: 0.00V (1032 to 600 ohms on pin2 then 330 to 440 ohms on pin1 and then begin at 100 and stabilize at 399ohms on pin1&2)
L7260: Pin1: 2.92V, Pin2: 3.34V
L7220: Pin1: 4.24V, Pin2: 5.06V
L9560: Pin1: 1.72V, Pin2: 1.82V
L9510: Pin1: 1.10V, Pin2: 1.10V
L7030: Pin1: 12.60V, Pin2: 8.80V, Pin3: 0.00V
L8920: Pin1: 0.95V, Pin2: 1.00V
L7770: Pin1: 1.06V, Pin2: 1.06V
L7560: Pin1: 1.05V, Pin2: 0.97V
L7330: Pin1: 1.40V, Pin2: 1.50V
L6995: Pin1: 3.24V, Pin2: 3.41V
L7660: Pin1: 0.74V, Pin2: 1.06V
L7100: Pin1: 0.02V, Pin2: 0.02V
L7101: Pin1: 0.02V, Pin2: 0.02V

[dellxps15]

Re: MacBook Pro 2.66Ghz mid2009 MB 820-2523-b to repair

ok u dont have cpu working. maybe that is causing backlight not turning on:


u7100 pin 20 voltage ? also pin 47 and 48 1 and 44 (all voltage on running pc)

[keeney123]

Re: MacBook Pro 2.66Ghz mid2009 MB 820-2523-b to repair

(With power on)
R8793 Have 0.00V on Pin1
(Without power on)
R8793 have 1071 Ohms and (820 to stabilize at) 1255uF



(on position 2000 on ohmmètre (200/2000/20K/200K/2000K))
for Q9806 I have
377 Ohms on Pin: 1,2,5,6 (PPBUS_S0_LCDBKLT_PWR)
378 Ohms on Pin: 4 (PPBUS_S0_LCDBKLT_FUSED)
0 Ohms on pin: 3 (PPBUS_S0_LCDBKLT_EN_DIV)

Can you confirm that i should take measure without power for Ohms ?


Thanks you for your investigation, it's very appreciated


Can you advise me for a solder station ?

I have seen this one but it's little bit too expensive for begining i think..

Thank u for your explanation Keeney, i understand little bit more how that works !

Just to clarify you should never measure ohms with the unit on. When you say O ohms on pin 3 do you mean infinite ohms or do you mean it is shorted to ground and therefore it is 0.0 Ohms. You should be on the 200 ohm scale. I will be out for a little while, but will look at the data you supplied when I come back

[keeney123]

Re: MacBook Pro 2.66Ghz mid2009 MB 820-2523-b to repair

I take it that when you talk about probe points they are just on the board as I have done a complete search of the schematic and they do not show up. So can you verify one more time the voltages on Q9806 on all the pins. With voltages measurement black/negative probe goes on ground. Also, with "power off" take a Ohm measurement on the 200 scale with red/ positive probe on pin 3 of Q9806 and black/negative probe on Ground. This reading should be high. If you can take all the reading right on Q9806, but do not short out the other pin when doing voltage reading.

[Hijo]

Re: MacBook Pro 2.66Ghz mid2009 MB 820-2523-b to repair

Hi

ok u dont have cpu working. maybe that is causing backlight not turning on:

I have try to start the macbook with a mini display to hdmi adapter, there is no change.

u7100 pin 20 voltage ? also pin 47 and 48 1 and 44 (all voltage on running pc)

Nice one, Pin20 was corroded with R7120. I have clean this space with 94°Alcohol and now we can see the pin20 and R7120 sux. (pic attached)
Edit: I've just broke R7120 by trying take continuity on it. I'm gonna wait to receive precision probes i have order, to take voltage, because the space between the elements is very small.

Just to clarify you should never measure ohms with the unit on. When you say O ohms on pin 3 do you mean infinite ohms or do you mean it is shorted to ground and therefore it is 0.0 Ohms. You should be on the 200 ohm scale. I will be out for a little while, but will look at the data you supplied when I come back

Ok thank you for the clarify.
I would say 0.00 Ohm, not infinite.
I think my 2000 scale is your 200 scale, in the manual i read resolution per range and resolution of 200 is 0.1

[keeney123]

Re: MacBook Pro 2.66Ghz mid2009 MB 820-2523-b to repair

So your 2000 scale is the lowest scale you have? Having this shorted to ground does not make a lot of sense. Try your ohm meter leads one way and then the other. You had said before that pin 3 on Q9806 had 9.69 volt on it. If it was shorted to ground there should be 0 volts on pin three. Also, remember to turn unit off when you are reading OHMs.

[Hijo]

Re: MacBook Pro 2.66Ghz mid2009 MB 820-2523-b to repair

Hi keeney,

I'm sorry but i have searched and have find nothing where i say Q9806 have 9.69V on pin3.

Q9807 have 8.71V on Pin3 and 0.00V on other pin. (0.02V on pin6 when logicboard running)

R9809 have 9.69V on Pin1 & 8.70V on Pin2. (running or not running)

Perhaps this made you on the wrong way ?

So your 2000 scale is the lowest scale you have?

No, The lowest scale i have is 200.

Having this shorted to ground does not make a lot of sense. Try your ohm meter leads one way and then the other.

Sry but i don't understand what is 'this' for you. Do you talk about R7120 ?

[keeney123]

Re: MacBook Pro 2.66Ghz mid2009 MB 820-2523-b to repair

R9809 have 9.69V on Pin1 & 8.70V on Pin2. (running or not running)

The above is from post 34. R9809 pin1 connects directly Q9806 pin3. This is where you read the voltage. The fuse going into Q9806 is where the 12.6 volts is you had read. If R9809 pin 1, the 147K ohm resistor, is Ohming out to ground with a direct short then the reading would be 0 volts.

Any time one is looking for a short you need to set to the lowest scale to get the lowest reading. As you increase your scale the lower digits shift upward to compensate for the higher readings. So say the allowable error of reading on the meter say is 1%, on the 200 scale that would be 2, on the 2000 that would be 20.

Also one could get confused when reading 1 on the higher scale instead of 1 it may actually be 1K ohm.

[ibrahim03]

Re: MacBook Pro 2.66Ghz mid2009 MB 820-2523-b to repair

Check this carefully

[ibrahim03]

Re: MacBook Pro 2.66Ghz mid2009 MB 820-2523-b to repair

Check this carefully

[keeney123]

Re: MacBook Pro 2.66Ghz mid2009 MB 820-2523-b to repair

Does anyone know the exact startup sequence on this computer as it would be extremely helpful in troubleshooting and for others with a problem on Macpro Apple Computer 2009. Otherwise we will be poking around until we figure it out.

[keeney123]

Re: MacBook Pro 2.66Ghz mid2009 MB 820-2523-b to repair

What I find interesting is P5VS0_SS and P5VS3_SS only appear on page 3 and seem to go nowhere when I do a search for them. These points affect Q7900 and Q7920

[ibrahim03]

Re: MacBook Pro 2.66Ghz mid2009 MB 820-2523-b to repair

What I find interesting is P5VS0_SS and P5VS3_SS only appear on page 3 and seem to go nowhere when I do a search for them. These points affect Q7900 and Q7920

This is a mistake in the printing Power Block Diagram


different numbers in circuit Q7220 and Q7225

look page 64

[keeney123]

Re: MacBook Pro 2.66Ghz mid2009 MB 820-2523-b to repair

This is a mistake in the printing Power Block Diagram


different numbers in circuit Q7220 and Q7225

look page 64

Thank you for the information. Just makes things a little more complicated.

[ibrahim03]

Re: MacBook Pro 2.66Ghz mid2009 MB 820-2523-b to repair

Thank you for the information. Just makes things a little more complicated.

your welcome ,

Yes, this is Apple's way, but we study to get to solve problems

[keeney123]

Re: MacBook Pro 2.66Ghz mid2009 MB 820-2523-b to repair

S0_PWR_PGOOD: 0.00V on Probe 228

U7201 pwr pgood page 64 should be high if both voltages are with in tolerance. Attached is data sheet.

So this is another problem. I would first verify the previous problem with Q9806 before I proceed to this.

[Hijo]

Re: MacBook Pro 2.66Ghz mid2009 MB 820-2523-b to repair

Hi Keeney123, dellxps15 and ibrahim03.

First i would thank you guy for the time you have passed on my problem. This forum like to be a very good place to be.

Secondly, i would sorry myself because i'm gonna can't continue this repair right now.
I am unemployed for 1 year already and I did not know at all what to look for work. This repair experience opened my eyes to the world of electronics and I now know what to get me for the future.

For that, thank you!

I would return in a few times on this forum but I have to save money to buy a Reworkstation and some tools to start some SMD soldering experience.

However, I bought a used motherboard and my new mac works wonderfully!

[keeney123]

Re: MacBook Pro 2.66Ghz mid2009 MB 820-2523-b to repair

Glad I could help you. Good luck on you career. You can always come back to your motherboard at a later time or not. Hope you find work soon as it is no good to be out of work.