Philips 20MC4304, Руководство по обслуживанию

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Power Supply Block Diagram
TD901BLP
LINE FIL
TER
BRIDGE
RECTIFIER
T2601
IC2601
ERR
OR
V
O
LT
A
GE DET
W2601
F2601 4A/125V
L2601
D2603 D2606
DEGA
USSING
COIL
CN2601
PS2601
HO
T
COLD
PO
WER SUPPL
Y/A
V
CB
A
MAIN CB
A
D
V
D MAIN CB
A UNIT
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 (F2601) 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.
4A 125V
SWITCHING
Q2601
IC1602
P-DO
WN
(T
O PIN84 OF IC1201)
Q2604
IC2603
IC2604
VR2601
Q2602
+5V REG.
+B ADJ
5+
B
6+
B
3
DEF+B
Q1608
SW+5V
Q1611
SW+5V
Q1613
SW+5V
P-ON+5V P-ON+5V P-ON+5V TIMER+5V P-ON+9V P-ON+12V AL+5V P-ON+12V
Q1612
AL+33V D/L+15V P-ON+5V +5V
-CTRL
P-ON-H (T
O PIN31 OF IC1201)
D
V
D-MAIN-PO
WER
(T
O PIN42 OF IC1201)
CN2602
T
O
CN502
TO
CRT/H.V .
BLOCK
CN2804
CN1803
CN2803
CN1804
CN2402
CN401
D
VD-ON+3.3V
1 2
3 4
13
13
D
V
D-ON+5V
16
16
D
V
D-MAIN-PO
WER
99
P-ON-H
22
P-ON+9V(3)
19
19
AC
-D
OW
N
19
19
D/L+15V
44
P-ON+9V(1)
10
10
P-ON+12V(1)
18
18
P-ON+12V(2)
99
AL+33V
88
AL+5.7V
66
P-ON+9V(2)
33
EV+1.5V
22
EV+1.5V
11
EV+1.5V
44
EV+3.3V
55
EV+3.3V
17
17
D
V
D-ON+3.3V
14
14
AL+9V
15
15
AL+9V
19
19
PWRCON
D
VD-ON+5V
EV+3.3V EV+1.5V AL+9V
12 16 15 14 11 13 10
9
2 3 5 7
FEED BA
CK
+3.3V
REG.
REG.
Q2606
Q2614
Q2607
Q2613
Q2609
Q2605
Q2615
Q2617
1
2
4
IC2602
+1.5V REG.
1
2
4
Q2611
Q2610
Q2612
Q2608
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
T
O
CHR
OMA
BLOCK
P-ON+9V
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
.)
PWRCON
T
O
D
VD SYSTEM
CONTR
OL
/SER
V
O
BLOCK
<D
VD SECTION>