2
4
16
6
7
Power Supply Block Diagram
CAUTION
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,
REPLACE ONLY WITH THE SAME TYPE T1.6AL/250V FUSE.
NOTE :
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
CAUTION !
Fixed voltage (or Auto voltage selectable ) power supply circuit is used in this unit.
If Main Fuse (F001) 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.
HE451BLP
1-7-9
1-7-10
COLD
MAIN CBA
HOT CIRCUIT. BE CAREFUL.
HOT
IC001
ERROR
VOLTAGE DET
Q002
Q003
Q001
F001
L003
LINE
FILTER
BRIDGE
RECTIFIER
D001 - D004
1
2
3
4
Q004
(SHUNT REGULATOR)
REG
AC001
T001
P-ON+32V
P-ON+15V
12
P-ON-H
AL+12V/+20.5V
AL+9V
AL+12V
C-POW-SW
AL+5V
TIMER+5V
P-ON+5V
P-DOWN-L
P-OFF-H
Q051
Q053
Q054
Q056
Q052
Q057
Q058
13
15
14
11
17
18
T1.6A L 250V
Q055
Q059
Summary of Contents for 27A-664
Page 22: ...Main 1 7 Schematic Diagram 1 8 3 1 8 4 HE451SCM1...
Page 23: ...Main 2 7 Sensor Schematic Diagram 1 8 5 1 8 6 HE451SCM2...
Page 24: ...Main 3 7 Schematic Diagram 1 8 7 1 8 8 HE451SCM3...
Page 25: ...Main 4 7 Jack Schematic Diagram 1 8 9 1 8 10 HE451SCM4...
Page 27: ...Main 6 7 Schematic Diagram 1 8 13 1 8 14 HE451SCM6...
Page 28: ...Main 7 7 Schematic Diagram 1 8 15 1 8 16 HE451SCM7...
Page 29: ...1 8 17 1 8 18 AFV Schematic Diagram HE451SCAFV...
Page 32: ...1 8 23 1 8 24 Jack CBA Top View Jack CBA Bottom View BHE470F01013 C...
Page 56: ...3 1 1 HE450FEX A1X EXPLODED VIEWS Front Panel...
Page 74: ...27A 664 HE451ED...
