3-11
PCS-1500/1500P
Fig. 3-5 Power Block
Step Down Converter(IC901)
MAX1626ESA
\3/5
V+
CS
EXT
OUT
+5V
+12V
Step Down Converter(IC900)
MAX1626ESA
\3/5
V+
CS
EXT
OUT
+3.3V
+12V
+12V
Q900
Q901
L900
L901
C900
C901
C918
C922
+12V
C932
DH5
DL5
LX5
R901
R900
Q906
CS5
FB5
Q907
V+
R907
L903
C902
C927
Q902
Q903
R902
L902
C926
DH3
DL3
LX3
CS3
FB3
Step Down Converter(IC902)
MAX786CAI
ON3
ON5
+5V-2
+3.3V-2
+12V
+12V
STANDBY
Voltage Regulator(IC904)
NJM2370U10
VIN
VOUT
+12V
C917
+10V
CTL
Voltage Regulator(IC908)
L88MS09T
VOUT
VIN
STB
+12V
C910
+9V
to DE-54 board
SLEEP
+5V
Blanking
Generator
Control
Logic
"POWER"
D907
+5V
Blankig
Generator
"STANDBY"
D908
StbyLED
from Output Port of IC750
(NETIF BLOCK)
SHDN
+12V
C941
R926
from CPU BLOCK
3-2. Circuit Description of the Respective Boards
Summary of Contents for PCS-1500
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