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DP-4X DEFLECTION SIDE SHUTDOWN DIAGRAM
RH32 allows ABL fluctuations to
manipulate the Trigger Point of Shut
Down as screen brightness varies.
ABL is inverse proportionate to
brightness.
This prevents false Shut Down triggering.
C
3
PROTECT _OVP
From Deflection Power Supply Shut
Down Output Circuits Diagram.
Vertical Output Circuit
I601
7
L603
C604
Q604
R630
C610
Excessive Vertical Current Det.
If the Vertical Output IC has a problem, R629
will sense the current rise. The voltage drop will
be reflected at the base of Q604 turning it on
and producing a Shut Down high.
SW +10.5V
SW +10.5V From QY62 SW +10.5V Regulator on Signal 5 of 5 Schematic.
Active
Normal
SW 28V
R629
0.68 Ohm
D608
R632
R631
D723
D
Any fluctuations in High Voltage will also be
reflected by the 50P output P/P.
By monitoring the 50P (50 Pulse) rises in High Voltage
will be sensed. If High Voltage climbs too high, DH15
will fire and trigger a shut down event.
DH14 will fire and stop High Voltage Horz. Drive
Flyback
TH01
TH02
10
ABL
8
5OP
4
RH32
RH25
DH15
RH24
Hi Volt
H. Drive
Excessive Hi
IH01
Voltage Det.
1
H. Drive
DK18 Monitors the -5V and +5V lines going to the DCU.
If the -5V line is loss, the +5V line provides the Shut Down Hi.
On the Convergence Circuit Diagram Power Def. page 2 of 3.
DK18
PDS3
8
SW
10
+10.5V
9
High Voltage
Sensing Circuit
RH23
1
DH13
7
LH06
29.01V
CH17
Stops H. Drive
7
OVP
CH10
+5V
RK23
2.7K
-5V
RK22
1.8K
6
PROTECT _OVP
To Signal PWB
See Protect_OVP and Protect_OCP
Shut Down Diagram for Details.
1
PROTECT _OCP
To Signal PWB
DH14
RH26
RH09
-5V Loss Det.
A
B
PAGE 01-05
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