iLO IWF2706 - Page 31

7-6
Power Supply Block Diagram
L4803BLP
4A/125V
F601 4A/125V
LINE FILTER
L601
AC601 AC CORD
DEGAUSSING COIL
DG691
CN691
PS691
BRIDGE RECTIFIER
D605 - D608
HOT COLD
T601
6 4 2 1
4 3
IC601 ERROR VOLTAGE DET
Q601
Q602
LIMITER
SWITCHING
Q652
VR661
+B ADJ
Q696
RL601
MAIN CBA
DG-ON-H (TO PIN75 OF IC301)
Q674 SWITCHING P-ON-ON
P-ON-H (TO PIN4 OF IC301)
HOT CIRCUIT. BE CAREFUL.
1 2
FEED
BACK
SWITCHING DG-ON-ON
+B AL+33V DEF +B PROTECT-1 (TO PIN74 OF IC301) AUDIO +B P-ON+8V P-ON+5V +8V-CTRL (TO PIN28 OF IC301) +5V-CTRL (TO PIN32 OF IC301) AL+5V P-ON+1.8V P-ON+1.2V DTV-H (TO PIN3 OF IC301) AL+2.5V P-ON+3.3V AL+9V P-ON+3.3V P-ON+1.8V +1.8V-CTRL (TO PIN36 OF IC301)
+BTP601
8 9
14 13 10 11 12
Q681
+8V SWITCHING
Q682
Q901
Q902
+5V SWITCHING
Q910
Q383
+3.3V SWITCHING
Q904
+5V SWITCHING
IC903
+1.8V REG.
IC904
+1.2V REG.
Q903
Q381
Q647
+1.8V SWITCHING
Q673
Q672
+9V REG.
RESET (TO PIN5 OF IC301)
GND
J371
Q382
Q631
OVER VOLTAGE PROTECT
IC911
(SHUNT REGULATOR)
+3.3V SWITCHING
+2.5V SWITCHING
(SHUNT REGULATOR)
IC905
CAUTION ! Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. If Main Fuse (F601) is blown , check to see that all components in the power supply circuit are not defective before you connect the AC plug to the AC power supply. Otherwise it may cause some components in the power supply circuit to fail.
For continued protection against risk of fire, replace only with same type 4 A, 125V fuse.
CAUTION ! : ATTENTION : Utiliser un fusible de rechange de même type de 4A, 125V.
4A/125V
NOTE: The voltage for parts in hot circuit is measured using hot GND as a common terminal.