Terence Ng
Member
Last Activity: 03-29-2023, 06:57 AM
Joined: 08-06-2020
Location: Bedok
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Dyson AM06 Intermittently oscillation turn ON
My Dyson having oscillation turn ON intermittently even fan in power off stage or it has been turn off oscillate via remote control. Try replace MOC3083 but the failure remain the same. Any other possible failure components causing the problem?Last edited by Terence Ng; 08-10-2021, 06:58 PM. -
Re: MacBook A1425 (820-3462) No green light
Hi...
Noted with thanks... -
Re: MacBook A1425 (820-3462) No green light
1) voltage @ PPDCIN_G3H_CHGR ?
>> 18.2V
2) voltage @ CHGR_UGATE ?
>> 0V
3) voltage @ CHGR_LGATE ?
>> 0V
4) voltage @ CHGR_ACOK ?
>> 3.4VLast edited by Terence Ng; 06-01-2021, 07:02 AM.Leave a comment:
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MacBook A1425 (820-3462) No green light
Received an MacBook A1425 with can't power on...No green/orange led light. Some measurement has been taken as below:-
> SYS_ONEWIRE: ~3.4V
> SMC_BC_ACOK_VCC : ~ 3.4V
> ADAPTER_SENSE: ~3.4V
> PPBUS_G3H : ~2V
* No shorted to ground
* Remove F7040 voltage remain the same ~2V
> SMC_RESET_L : ~3.4V
> PP3V42_G3H_CHGR: ~3.4V
> PP5V1_CHGR_VDD,PP5V1_CHGR_VDDP: ~5.48V
> CHGR_DCIN_D_R: ~16.5V
> CHGR_AGATE: ~6.8V
> CHGR_SGATE: ~16.2V
> PPDCIN_G3H_INRUSH: ~16.4V
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Re: Samsung NP930QAA - Schematic
Now can power on with fan spin a few second and stop... but no display:
Schematic needed.. Somebody can help?
Leave a comment:
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Re: Macbook Pro 15" 820-2850-A No Power
C5369 - No Mounted
R5371 - No Mounted
C5318 - No Mounted
U5313 - No Mounted
U5323 - No Mounted
U5101 - No Mounted
C5101 - No Mounted
U3301 - No Mounted
C3302 - No Mounted
U3300 - No Mounted
R3940 - No MountedLeave a comment:
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Re: Samsung NP930QAA - Schematic
Motherboard Part number BA41-02617ALeave a comment:
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Samsung NP930QAA - Schematic
Hi,
Anybody have NP9300QAA (Samsung Series 9 NB) schematic or anyway to
identify which part (Refer to attach photo) are they using because missing body marking?... -
Macbook Pro 13" A1502 backlight goes off
A1502 macbook pro having an issues which is backlight goes off after Apple logo with loading bar screen. LCD display OK (With BAcklight On) when it power on in SMC bypass mode. Any ideal where when wrong? -
Re: Macbook Pro 15" 820-2850-A No Power
Latest measurement, Power Rails measure as below with only adaptor plug in (no Battery):-
> PPBUS_G3H -- 12.57v
> PPBUS_CPU_IMVP_ISNS -- 11.58v
> PPDCIN_G3H -- 16.5v
> PP3V42_G3H -- 3.42v
> PP3V3_S5 -- 3.32v
> PP3V_S3 -- 3.32v
> PP3V_S0 -- 3.30v
> PP5V_S5 -- 5v
> PP5V_S3 -- 5V
> PP5V_S0 -- 5V
> PP1V05_S0 -- 0V
-- CPUVTTS0_EN -- 3.3v
> ALL_SYS_PWRGD -- 0v
Observation:
1. All_SYS_PWRGD should be 3.3v for system...Leave a comment:
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Re: Macbook Pro 15" 820-2850-A No Power
---Yes, fuse in good conditions...Leave a comment:
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Re: Macbook Pro 15" 820-2850-A No Power
Voltage measure with only battery condition:-
> PPBUS_G3H -- 12.57v
> PPBUS_CPU_IMVP_ISNS -- 11.58v
> PPDCIN_G3H -- 0v
> PP3V42_G3H -- 3.42v
> PP3V3_S5 -- 3.32v
> Others power rails no voltage.Leave a comment:
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Re: Macbook Pro 15" 820-2850-A No Power
Is Known good 85W Magsafe, battery is charging when plug in.Leave a comment:
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Macbook Pro 15" 820-2850-A No Power
Symptom: Plug in DC magsafe showing green light and change to orange colour for battery charging. In this case, unit unable to power on when power button has been press. No fan spinning, no start up sound.
Step debug as below:-
1. Unit still unable to power on via power pad.
2. Failure remain the same after SMC reset.
3. Power Rails measure as below with only adaptor plug in (no Battery):-
> PPBUS_G3H -- 12.57v
> PPBUS_CPU_IMVP_ISNS -- 11.58v
> PPDCIN_G3H -- 16.5v
> PP3V42_G3H -- 3.42v
> PP3V3_S5 --... -
Re: New Members - please post your introductions here
Names Terence Ng
46 - Birthday 21 Dec 1973.
Married, we have 4 kids.
MO:
I am hardware engineer and interesting in troubleshootingLeave a comment:
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