1-7-6
Power Supply Block Diagram
T7500BLP
6
4
2
1
12
11
10
9
7
8
LINE
FIL
TER
BRIDGE
RECTIFIER
T601
IC601
ERR
OR
V
O
LT
A
G
E DET
W601
F601
4A/125V
L601
D603 - D606
SWITCHING
Q604
VR601
DEGA
USSING
COIL
CN601
Q601
+B ADJ
.
FEED
BA
CK
LIMITER
Q602
PS601
4
1
3
2
HO
T
COLD
Q606
Q605
Q607
DG601
AL+33V
P-ON+5V
MAIN CB
A
NO
TE :
The v
oltage f
or par
ts in hot circuit is measured using
hot GND as a common ter
minal.
4A/125V
TIMER+5V
P-DO
WN
(T
O PIN84 OF IC201)
P-ON-ON
P-ON+5V
P-ON+5V
P-ON+8V
AL+12V
P-ON+12V
AL+5V
P-ON-H
(T
O PIN31 OF IC201)
+5V REG.
+5V REG.
+5V REG.
+5V REG.
+8V REG.
IC602
Q608
Q611
Q610
Q609
Q612
+5.7V
REGULA
T
O
R
IC301
30
27
+B
DEF+B
HOT CIRCUIT. BE CAREFUL.
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
C
AUTION !
F
ixed 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
c
ircuit are not defective before you connect the AC plug to the AC power supply.
O
therwise it may cause some components in the power supply circuit to fail.
+5V REG.
Q613
P-ON+5V
