Service Manuals, User Guides, Schematic Diagrams or docs for : Dell DELL_915_power
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DB1 (Barbados) Power
Insert AC adapter only, Sequence
then without press power
button
Power Plan:
PS_ID 0. RTC power plane.
1. Always power plane.
2. SUS power plane.
3. RUN power plane.
U6, MAX1909 will check AC and ACPI Power State:
battery power 1. S0: System Full On, All power planes are ON.
2. S3: Suspend to RAM, RUN power off.
3. S4: Suspend to Disk, RTC and Always power
If AC type is un-know or ON.(AC)
battery can not be 4. S5: Soft Off, power state like S4.
charged, you can check
PS_ID relate circuit.
PWR_SRC
VCCRTC is generated by U53
MAX1615
through D30
VCCRTC
U49
www.kythuatvitinh.com
Macallen 3 will output ALWON to MAX8734A to turn on +3VALW and +5VALW
If no ALW power, what ALWON
should we do?
A: Check charger
MAX1909 ACAV_IN relate
circuit.
U13,MAX8734A will have +3VALW and +5VALW power output on pin25 and pin 18
+3VALW
+5VALW
Macallen
Digitally signed by fdsf When +3VALW is reach
DN: cn=fdsf, o=fsdfsd, Go! 3V,VCC1_PWROK is
ou=ffsdf, output high, this signal
email=fdfsd@fsdff, If Macallen is working. also reset Macallen3
c=US DBG2 pin2 will have internally.
Date: 2010.02.15 Q: If no debug out pulse? 1,2,3,4 pulse when AC
08:09:22 +07'00' 1. Macallen. adapter
2. BIOS ROM.
attached( DEBUG_OUT )
DB1 (Barbados) Power
Sequence
Insert AC adapter only, then
press power
button
POWER_SW#
After +3VALW , +5VALW, If Macallen do not driven SUS_ON high
1. Re-heat Macallen.
DEBUG_OUT were all come out. 2. Change one new Macallen.
Macallen should assert SUS_ON. 3. Still no SUS_ON, check BIOS ROM.
SUS_ON
SUS_ON will turn on MAX8734A
producing +5VSUS , +3VSUS.
SUSPWROK_5V
www.kythuatvitinh.com U46,MAX8743 will
produce +1.5VSUS
U38,TPS51116 will
produce +1.8VSUS.
+1.8VSUS_PG
Delay
10ms
+1.5VSUS +1.8VSUS
SUS_ON
Check All SUS power planes
are in correct voltage level?
U50 pin 8
SUSPWROK
DB1 (Barbados) Power
Sequence
If SUSPWROK is OK, it will
drive to ICH4
SUSPWROK
When initialized ICH6-M, drives
SLP_S3#
PM_SLP_S3#
After approximate 10ms soft
start delay, Macallen3
RUN_ON_D
turned on RUN planes with
SUS planes
RUN_ON
SUS POWER PLANES RUN POWER PLANES
RUN_ON_D
www.kythuatvitinh.com
+5VSUS
+1.5VSUS
+5VSUS
+3VSUS
+1.5VSUS
+5VSUS was initial
trigger for TPS51116 will produce
TPS793475.It will +0.9VRUN
produce +5VA
+0.9VRUN
+5VA Q34 Q21 Q13 MAX8743 will produce
+1.05VRUN
Q48
4.75V for audio circuit.
+1.5VRUN
+1.5VRUN
+3VRUN
+5VRUN
+1.05VRUN
Delay
Make sure all RUN power 10ms
planes are in correct voltage
level.
+2.5VRUN_PG
+1.05VRUN_PWRGD
If these three signal
assert, then through
U50 ( AND gate ) will
produce RUNPWROK
U50 pin 6
RUNPWROK
DB1 (Barbados) Power
10ms after +3VRUN power Sequence
plane comes up
RUNPWROK
RUNPWROK was initial trigger for
ISL6217. It will produce VCC_CORE
VCC_CORE
If no Vcore:
After VCC_CORE came 1. Check high/low side MOSFET.
out. ISL6217 will 2. Check .
produce
VGATE_PWRGD
When Macallen is ready to
release the Pentium(receive
RUNPWROK), it will drive
RESET_OUT#
All clocks
RESET_OUT#
Delay 10ms
www.kythuatvitinh.com XDP_DBRESET#
ICH_PWROK is driven to ICH6
as PWROK allowing release of
ICH_PWROK
the Dothan from INIT and U52.11
deassertion of PCIRST#
ICH6-M
Next step should check:
1. PCIRST#
2. CPURST#
3. GTL_ADS#
If CPU power is OK and CPURST# de-assertion.
1. CPU: re-heat, change one new.
2. Change BIOS ROM.
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