PROTECT _OVP
DP-4X DEFLECTION SIDE SHUTDOWN DIAGRAM
PAGE 01-05
Flyback
5OP
29.01V
TH01
TH02
RH32
7
LH06
Excessive Hi
Voltage Det.
RH23
CH17
Normal
Active
8
ABL
I601
7
Vertical Output Circuit
R630
R631
C610
DH15
R629
0.68 Ohm
Q604
SW 28V
D608
Excessive Vertical Current Det.
R632
From Deflection Power Supply Shut
Down Output Circuits 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.
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
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.
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.
High Voltage
Sensing Circuit
DH13
4
RK22
1.8K
RH24
C604
RH25
RK23
2.7K
-5V
+5V
IH01
OVP
Hi Volt
H. Drive
7
Stops H. Drive
DH14
RH26
CH10
RH09
H. Drive
1
-5V Loss Det.
1
10
L603
PROTECT _OVP
To Signal PWB
8
PDS3
See Protect_OVP and Protect_OCP
Shut Down Diagram for Details.
PROTECT _OCP
To Signal PWB
9
SW +10.5V From QY62 SW +10.5V Regulator on Signal 5 of 5 Schematic.
A
6
B
C
3
1
DK18
D723
10
SW
+10.5V
SW +10.5V
D
Summary of Contents for 51F510
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Page 5: ...DP 4X CHASSIS INFORMATION POWER SUPPLY INFORMATION SECTION 1 ...
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Page 67: ...DP 4X CHASSIS INFORMATION DEFLECTION INFORMATION SECTION 5 ...
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Page 79: ...DP 4X CHASSIS INFORMATION DIGITAL CONVERGENCE INFORMATION SECTION 6 ...
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