Protection Circuit
Abnormal voltage (DTV+9V) detection circuit
(Over voltage Detect)
SOS (L)
IC6004
(TV MICROCONTROLLER)
POWER P.C.B.
MAIN P.C.B.
Over voltage/current detection circuit
[POWER Indicator one blink]
[POWER Indicator two blinks]
SUB+5V
LCD+17V SENS (SOS(L))
DTV+9V SENS (SOS(L))
MAIN+3.3V SENS (SOS(L))
OVER VOLTAGE
DETECT CIRCUIT
OVER CURRENT
DETECT CIRCUIT
LAMP RXD
SUB+5V SENS (SOS(L))
MAIN P.C.B.
SOS terminal of IC6004 (TV microcontroller)
T1001
IC1001
DC-DC
CONVERTER
IC1104,
Q1106
IC1101,
IC1102
DC-DC
CONVERTER
IC1103,
Q1107
DC-DC
CONVERTER
IC1104,
Q1106
POWER
TRANS.
R1017
(FEEDBACK LOOP)
R1018
R1019
(+9V)
FULL-WAVE
RECTIFIER
SWITCHING
CONTROL
Q1102
SW
Over current
Detect
CN1101
IC6004 (TV MICROCONTROLLER)
Q6018
Q4502
D1104,D1105,ETC
IC4501
(AUDIO POWER AMP)
IC1101,IC1102
IC8001 (PEAKS)
10
30
57
34
SOUND SOS (H)
PANEL SOS (L)
PANEL STATUS (SOS(L))
SOUND SOS (L)
PANEL SOS (L)
PANEL STATUS (SOS(L))
72
48
13
9
AC STOP(L)
12
6
10
11
5
L6
SOS (L)
114
G1
CN6005
7
67
FAN SOS
CN3001
29
117
3
9
2
IC1107
+5V
REG.
2
1
IC1107
+5V
REG.
2
1
IC1105
+1.8V
REG.
2
1
SUB+1.8V
DTV+9V
SUB+3.3V
SUB+1.2V
IC1002
FEED
BACK
IC1003
SHUNT
REG.
1
3
15
16
1
CN1003
10
11
CN1101
10
11
114
Normal
SOS
SOS: 0V on DTV+9V line
MAIN P.C.B.
POWER P.C.B.
IC6004 (TV MICROCONTROLLER)
DTV+9V SENS
30
DTV+9V
+9V
CN1101
CN1003
10
10
11
11
Normal
SOS
SW
Q1102
Error Information
LAMP FAN SOS
OPT FAN SOS
FRONT FAN SOS
REAR FAN SOS
NORMAL
REAR JACK P.C.B.
CONNECTION ERROR
:APPROX. 0V
:APPROX. 0.5V
:APPROX. 1.3V
:APPROX. 2V
:APPROX. 2.8V
:APPROX. 3.3V
PT-56LCX70 / PT-61LCX70 / PT-50LCX7 / PT-56LCX7 / PT-61LCX7
13
