820-00165 not turning on

bartech

Member
green light then red, no battery connected, mainboard take 0.091 A

U1950
1-0,06v
2-3,34v
3-0
5-0
6-0
7-0
8-3.44

PPBUS_G3H: 8.6v
PP3V42_G3H: 3.45v
PP5V_S5: 5.1v
PP5V_S0: 5.1v
PP3V3_S5: 3.3v
PP3V3_S4: 0v
PP3V3_S0: 3.3v
 

2informaticos

Administrator
Staff member
If 3V3_S0 is there, 3V3_S4 must also be present.
Start checking diode mode on it.
If good, change U8000; supposing it gets S4_PWR_EN.

Also check voltage on all big coils.
Just for test, remove Q8150.
 

bartech

Member
S4_PWR_EN - 3,4v
L7310-0v
L7320-0v
L7630-0,37v
L7430-1,2v
L7130-8,6v
L7560-3,35v
L7520-5,13v
L3095-0v
L7701-0v
 

2informaticos

Administrator
Staff member
"L7630-0,37v"
Check diode mode to ground first.
If good, post U7600 basic voltages; pins 12 & 16.
Be sure R/C7630 and R7631 are good.
 

2informaticos

Administrator
Staff member
Grounded means how much in ohm scale???
There should be around 10-15 ohm, as normal.

What about diode mode to ground at L7630?
 
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