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SA-PT550E / SA-PT550EB / SA-PT550EG
18.8. Power
IC8111
C0DBZYY00018
+3.3V DC-DC
CONVERTER
VO
D+3.3V
1
VIN
8
CONT
5
QR8111
POWER CONTROL
IC8151
C0DBEHG00006
+1.2V REGULATOR
NSW1.2V
4
OUT
VCC 2
Q2911, D2919
+5V REGULATOR
SW+5V
Q2916, D2937, D2938
CN2002
T+9V
T+9V
+9V REGULATOR
9
M+9V
Q2919
DC DETECT
TO
IC2900
SYSTEM CONTROL
Q2909
C0DAAYY00042
SWITCHING
DC DETECT
DC DET1
REGULATOR
Q2903
+ 7V
+7V
2
REGULATOR
Q2921, Q2922
D2943
DC DETECT
IC2903
C0DAAMH00012
D+5V
FP8101
CN2001
SWITCHING
17, 19, 20, 22
REGULATOR
Q2907, Q2910
2
A+5V
FP8101
CN2001
+5V
A+5V
15
POWER SUPPLY
Q2906, Q2908
FP8101
CN2001
ADAC5V
+5V
ADAC5V
38, 40
POWER SUPPLY
Q2904, D2912
+2.7V
+ 2.7V
FP8101
CN2001
REGULATOR
9, 11
-7V
CN2004
CN5802
SYS6V
SYS6V
2
CN2004
CN5802
PCONT
10
TO/FROM
SYSTEM CONTROL
CN2004
CN5802
SYNC
1
OUT
VCC 1
Q5860,Q5861,Q5862
TRANSFORMER
TEMP. DETECT
OUT
VCC 1
FAN 18V
H5500
CN5801
FAN DC
2
QR5801
TO SYSTEM
CN2004
CN5802
DCDET
DC DETECT
CONTROL
4
CN2004
CN5802
DC18V
+ 18V
8, 9
Q2901, Q2902
- 7V
- 13V
CN2004
CN5802
REGULATOR
5
H5500
CN5801
+ 30V SENSE
+ 30V SENSE
7, 8
H5500
CN5801
- 30V SENSE
- 30V SENSE
3, 4
IC5801
C0DABFC00002
SHUNT
REGULATOR
Q5802, D5806
FEED BACK CIRCUIT
80
IC5799
MIP4110MSSCF
T5751
BACKUP
SWITCHING
REGULATOR
TRANSFORMER
3
5
D
3
CL
7
D5896
2
6
4
VCC
Q5899
PC5799
CURRENT
2
FB
FEED BACK
LIMITING
SWITCH
PC5701
QR5810
FEED BACK
PC5702
Q5898
SYNC
SWITCH
TH5860
T5701
MAIN
TRANSFORMER
D5805
15
D5701
L5702
L5701
TH5701
4
5
D5803
IC5701
17
Q5721
C5HACYY00003
SWITCHING
SWITCHING
Q5720,
REGULATOR
D5804
Q5722
18
CURRENT
2
LIMITING
D5802
4
VCC
SWITCH
14
7
D5801
11
8
1
D
PC5720
FEED BACK
6
FB
SA-PT550E/EB/EG POWER BLOCK DIAGRAM
P5701
AC INLET
DZ5701
F1
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Troubleshooting
