• Sony VAIO VJP132C11N can't turn on

It is currently 15 May 2025, 00:31

 [SOLVED] Sony VAIO VJP132C11N can't turn on

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#1 Sony VAIO VJP132C11N can't turn on

by cygron • 17 August 2022, 16:28
Model : Sony VAIO VJP132C11N
Board id : DA0MS8MBAD0 Rev: D

Laptop can't power on. Drain and Gate sides of P-Channel Mosfet (PQ30) are 19V. But source side has 0V. I only have schematic. Need help.

Re: Sony VAIO VJP132C11N can't turn on

by Google Adsense [BOT] • 17 August 2022, 16:28

#2 Re: Sony VAIO VJP132C11N can't turn on

by matic • 17 August 2022, 17:24
Hello!

Measure the resistance to ground on pin 3 (central big pin) of diode PD6.
If the resistance is high (in kΩ range or greater), measure the voltages to ground on pins 2, 3, 5, 6 of transistor PQ35.

#3 Re: Sony VAIO VJP132C11N can't turn on

by cygron • 18 August 2022, 04:06
Resistance to ground on pin 3 (central big pin) of diode PD6 is about MΩ.
PQ35 voltages to ground on pins
Pin 2, 3 - 9.36V
Pin 5 - 0.1V
Pin 6 - 0V

#4 Re: Sony VAIO VJP132C11N can't turn on

by matic • 18 August 2022, 13:52
Bridge the pins 1, 8 of transistor PQ30 and supply the board with a laboratory power supply set to 19V and current limit to 200mA.
Remeasure the voltages to ground on pins 3, 5, 6 of transistor PQ35 in this case.

#5 Re: Sony VAIO VJP132C11N can't turn on

by cygron • 18 August 2022, 14:37
PQ35 pin 5 is 14.6V, Pin 3 and 6 are 0V.

#6 Re: Sony VAIO VJP132C11N can't turn on

by matic • 18 August 2022, 20:41
Remove the bridge on transistor PQ30 and measure the following voltages:
- On pins 1, 2 of chip PU13.
- On all pins of chip PU11.

#7 Re: Sony VAIO VJP132C11N can't turn on

by cygron • 19 August 2022, 04:18
PU13 pin 1 and 2 are 0V.
PU11
pin 1 - about 0.6V
pin 2 and 3 - about 0.3V
pin 4 - 0V
pin 5 - 0.5V
pin 6, 7, 8 - 0V

#8 Re: Sony VAIO VJP132C11N can't turn on

by matic • 19 August 2022, 08:02
The RTC battery seems discharged. Check it and replace it if necessary.
Remeasure the voltages from post #6 with a functional RTC battery.

#9 Re: Sony VAIO VJP132C11N can't turn on

by cygron • 19 August 2022, 13:30
With 3V RTC Battery,
PU13 pin 1 and 2 are 0V.
PU11
pin 1, 2, 3 - 2.9V
pin 4, 5, 6, 7 - 0V
pin 8 - 2.9V

#10 Re: Sony VAIO VJP132C11N can't turn on

by matic • 19 August 2022, 14:40
Remove the transistor PQ35 from the board and measure the voltages to ground on pins 1, 4, 8 of transistor PQ30 and on both pins of diode PD6.
Supply the board with a laboratory power supply set to 19V and current limit to 200mA.

#11 Re: Sony VAIO VJP132C11N can't turn on

by cygron • 19 August 2022, 15:02
PQ30 pin 1, 4 - 19V and pin 8 - 0V
Both pins of diode PD6 - 0V

#12 Re: Sony VAIO VJP132C11N can't turn on

by matic • 19 August 2022, 19:41
Measure the resistance between pins 1, 4 of transistor PQ30.
If the resistance is high (in kΩ range), also remove the transistor PQ31 from the board and remeasure the voltages from post #11.

#13 Re: Sony VAIO VJP132C11N can't turn on

by cygron • 21 August 2022, 12:59
Remove the transistor PQ31, laptop is turn on. PQ30 pin 1, 8 are 19V and pin 4 is about 9V. I don't have this type of transistor to replace. Is it ok?
For the first time laptop is turn on, battery is low but charging is ok. When battery charging percent is 93%, charging is stop. Laptop show only plug in (not charging). And laptop can't open with battery.

#14 Re: Sony VAIO VJP132C11N can't turn on

by matic • 21 August 2022, 14:53
cygron wrote:PQ30 pin 1, 8 are 19V and pin 4 is about 9V. I don't have this type of transistor to replace. Is it ok?
This transistor is good, there is no need to replace it.

Solder the transistor PQ35 back to the board and check, if the machine still works.

#15 Re: Sony VAIO VJP132C11N can't turn on

by cygron • 21 August 2022, 15:25
No i mean PQ31 transistor. PQ35 is already resolder and laptop is running ok. Only the battery problem exit.

#16 Re: Sony VAIO VJP132C11N can't turn on

by matic • 21 August 2022, 18:46
Measure the voltages to ground on pads 1, 5 on the place of transistor PQ31 (without transistor PQ31).

#17 Re: Sony VAIO VJP132C11N can't turn on

by cygron • 22 August 2022, 07:02
Pad 1, 5 ( with laptop turn off and turn on ) - 0V

#18 Re: Sony VAIO VJP132C11N can't turn on

by matic • 22 August 2022, 08:00
Measure the resistance to ground on pad 1 on the place of transistor PQ31.

#19 Re: Sony VAIO VJP132C11N can't turn on

by cygron • 24 August 2022, 08:37
The resistance to ground on pad 1 on the place of transistor PQ31 is 2.8 Ohm.

#20 Re: Sony VAIO VJP132C11N can't turn on

by matic • 24 August 2022, 09:04
cygron wrote:The resistance to ground on pad 1 on the place of transistor PQ31 is 2.8 Ohm.
This is a short circuit to ground. One of the transistors PQ33, PQ35 or PQ38 is damaged.
Remove these transistors one by one from the board and check which one needs to be removed that the resistance to ground on pad 1 on the place of PQ31 goes to the high value. That's most likely the transistor PQ33.

Re: Sony VAIO VJP132C11N can't turn on

by Google Adsense [BOT] • 24 August 2022, 09:04
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