1-7-6
Power Supply Block Diagram
T6552BLP
6
4
2
1
14
13
11
10
9
8
LINE
FIL
TER
BRIDGE
RECTIFIER
T601
IC601
ERR
OR
V
OL
T
A
GE DET
F601
T4A/250V
L601,L602
D601 - D604
SWITCHING
Q604
VR601
CN601
Q602
+B ADJ
.
FEED
BA
CK
LIMITER
Q603
PS602
4
1
3
2
HO
T
COLD
Q608
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.
CA
UTION !
Fix
ed v
oltage po
w
er supply circuit is used in this unit.
If Main Fuse (F601) is b
lo
wn, chec
k to see that all components in the po
w
er supply
circuit are not def
ectiv
e bef
ore y
ou connect the A
C plug to the A
C po
w
er supply
.
Otherwise it ma
y cause some components in the po
w
er supply circuit to f
ail.
TIMER+5V
P-DO
WN-L
(T
O PIN85 OF IC201)
P-ON-ON
AL+9V
P-ON+8V
AL+12V(2)
AL+12V(1)
AL+5V
+5.7V
REG.
IC301
39
55
+B
DEF+B
PO
WER
SW602
+5V REG.
Q606
Q605
+8V REG.
Q607
AL+5V
P-ON+8V
P-ON-L
P-DO
WN-L
12
5
4
6
AL+12V(1)
3
AL+12V(2)
7
AL+9V
8
AL+33V
11
12
5
4
6
3
7
8
11
TO
CR
T/H.V
.
BLOCK
TP503
+B
TP504
GND
CN602
12
JUNCTION-A
CB
A
H.V
./PO
WER SUPPL
Y CB
A
CL603B
CN603
P-ON-H
(T
O PIN67 OF IC201)
+5V
REG.
+5V
REG.
+5V
REG.
IC681
Q684
Q686
P-ON+5V(1)
P-ON+5V(3)
P-ON+5V(2)
AL+33V
CL603A
12
5
4
6
3
7
8
11
12
5
4
6
3
7
8
11
CAUTION
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,
REPLACE ONLY WITH THE SAME TYPE T4A/250V FUSE.
Q682
Q206
CL604
TO
P
CO
VER
TO
DEGA
USSING
COIL
TO
A
C-CORD
NO
TE FOR
WIRE CONNECT
ORS:
1.
PREFIX SYMBOL "CN" MEANS CONNECT
OR.
(CAN DISCONNECT AND RECONNECT
.)
2.
PREFIX SYMBOL "CL" MEANS
WIRE-SOLDER
HOLES OF
THE PCB
.
(WIRE IS SOLDERED DIRECTL
Y
.)
TEST POINT INFORMA
TION
:INDICA
TES A
TEST POINT
WITH A JUMPER
WIRE A
CR
OSS A HOLE IN
THE PCB
.
:USED
T
O INDICA
TE A
TEST POINT
WITH A COMPONENT LEAD ON FOIL SIDE.
:USED
T
O INDICA
TE A
TEST POINT
WITH NO
TEST PIN.
:USED
T
O INDICA
TE A
TEST POINT
WITH A
TEST PIN.
" " = SMD