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Protection Circuit
SOS terminal of IC6004 (TV microcontroller)
6
9
10
IC1107
11
+5V
1
2
REG.
IC1104,
Q1106
DC-DC
CONVERTER
Q6018
7
Error Information
29
LAMP FAN SOS
:APPROX. 0V
OPT FAN SOS
:APPROX. 0.5V
FRONT FAN SOS
:APPROX. 1.3V
REAR FAN SOS
:APPROX. 2V
NORMAL
:APPROX. 2.8V
REAR JACK P.C.B.
:APPROX. 3.3V
CONNECTION ERROR
[POWER Indicator one blink]
T1001
FULL-WAVE
15
10
1
RECTIFIER
16
11
POWER
TRANS.
IC1001
SWITCHING
2
9
3
CONTROL
(FEEDBACK LOOP)
R1017
IC1002
IC1003
R1018
FEED
SHUNT
3
1
BACK
REG.
R1019
POWER P.C.B.
[POWER Indicator two blinks]
IC6004 (TV MICROCONTROLLER)
DTV+9V SENS
MAIN P.C.B.
IC6004 (TV MICROCONTROLLER)
AC STOP(L)
12
LCD+17V SENS (SOS(L))
10
DTV+9V SENS (SOS(L))
30
SUB+5V SENS (SOS(L))
34
MAIN+3.3V SENS (SOS(L))
57
LAMP RXD
67
FAN SOS
117
MAIN P.C.B.
Over voltage/current detection circuit
IC1107
(+9V)
10
+5V
1
2
REG.
11
IC1105
+1.8V
1
2
REG.
IC1104,
Q1106
DC-DC
CONVERTER
IC1103,
Q1107
DC-DC
CONVERTER
(Over voltage Detect)
Abnormal voltage (DTV+9V) detection circuit
DTV+9V
Normal
SOS
30
SOS: 0V on DTV+9V line
PT-56LCX70 / PT-61LCX70 / PT-50LCX7 / PT-56LCX7 / PT-61LCX7
Q4502
SOUND SOS (H)
72
PANEL SOS (L)
48
PANEL STATUS (SOS(L))
13
SOS (L)
114
SUB+5V
SUB+1.8V
DTV+9V
SUB+3.3V
SUB+1.2V
IC1101,
IC1102
Over current
Normal
Detect
Q1102
SW
MAIN P.C.B.
10
10
11
11
POWER P.C.B.
13
IC4501
(AUDIO POWER AMP)
SOUND SOS (L)
5
IC8001 (PEAKS)
PANEL SOS (L)
L6
PANEL STATUS (SOS(L))
G1
D1104,D1105,ETC
Q1102
OVER VOLTAGE
SW
DETECT CIRCUIT
IC1101,IC1102
OVER CURRENT
DETECT CIRCUIT
IC6004
(TV MICROCONTROLLER)
SOS
SOS (L)
114
+9V
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