Akira LCT-32HSSTP Schematic
LCT TV
Service Manual
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MODEL:
LCT-32HSSTP
Model No.: LCT-32HSSTP
Version: 1.0
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CONTENTS
SAFE PRECAUTION.............................................................................................................................. 4
BLOCK DIAGRAM ................................................................................................................................5
FUNCTION OF CONJUNCTION........................................................................................................... 6
SIGNAL DIAGRAM ............................................................................................................................... 9
POWER DIAGRAM.............................................................................................................................. 10
TROUBLESHOOTING ......................................................................................................................... 11
WALL-MOUNTING BRACKET INSTALLATION GUIDE................................................................ 14
CIRCUIT DIAGRAM............................................................................................................................ 17
PART LIST............................................................................................................................................. 26
Model No.: LCT-32HSSTP
Version: 1.0
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SAFETY PRECAUTION
WARNING:
Service should not be attempted by anyone unfamiliar with the necessary precaution on this receiver.
The following are the necessary precautions to be observed before servicing this chassis.
1. When replacing a chassis in the cabinet, always be certain that all the protective devices are put
back in place, such as: non-metallic control knobs, insulating covers, shields, isolation
resistor-capacitor network etc.
2. When replacing parts or circuit boards, disconnect the power cord.
3. When replacing a high wattage resistor (oxide metal film resistor) on the circuit board, keep the
resistor 10mm (1/2in) away from circuit board.
4. Connection wires must be kept away from components with high voltage or high temperature.
5. If any fuse in this TV receiver is blown, replace it with the FUSE specified in the chassis parts list.
PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in the chassis have special safety-related characteristics.
These characteristics are often passed unnoticed by a visual inspection.
Replacement parts, which have these special safety characteristics are identified in this manual and its
supplement electrical components having such features are shaded on the schematic diagram and the
parts list.
Before replacing any of these components, read the parts list in this manual carefully. The use of
substitute replacement parts which do not have the same characteristic as specified in the parts list may
create shock, fire or other hazards.
Model No.: LCT-32HSSTP
Version: 1.0
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BLOCK DIAGRAM
XP4
XP7 XP3
TUNNER BOARD
XP2
XP8
PANEL
P40 CN801
CN904
CN902
MAIN BOARD
CN901
XP301
KEY BOARD
XP501 XP511
POWER BOARD
Model No.: LCT-32HSSTP
Version: 1.0
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FUNCTION OF CONJUNCTION
CN801---XP501
ITEM NAME FUNCTION
1 5V FOR PANEL POWER
2 PS FOR POWER OFF
3 GND GND
4 14V FOR AUDIO POWER
5 PGND AUDIO GND
6 12V FOR MAIN POWER
7 12V FOR MAIN POWER
8 GND FOR MAIN GND
9 GND FOR MAIN GND
CN902---XP4
ITEM NAME FUNCTION
1 GND FOR AUDIO GND
2 14V FOR AUDIO POWER
3 14V FOR AUDIO POWER
4 GND FOR AUDIO GND
5 12V FOR AUDIO POWER
6 GND FOR AUDIO GND
7 5.0V TUNNER POWER
CN901---XP2
ITEM NAME FUNCTION
1 ADC1 FOR SCART1 AUTO IDENTIFY
2 ADC2 FOR SCART1 AUTO IDENTIFY
3 GND GND
4 MUTE AUDIO MUTE
5 RESET MSP3410 RESET
6 GND GND
7 SDA FOR SERIAL DATA
8 SCL FOR SERIAL CLOCK
Model No.: LCT-32HSSTP
Version: 1.0
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CN901---XP2
ITEM NAME FUNCTION
1 GND GND
2 CVBS FOR TV'S CVBS SIGNAL
3 GND GND
4 GREEN FOR SCART GREEN
5 GND GND
6 RED FOR SCART RED
7 GND GND
8 FB FOR FAST BLANK
9 GND GND
10 BLUE FOR SCART BLUE
11 GND GDN
12 AVOUT FOR MONITOR OUT
CN903---XP1
ITEM NAME FUNCTION
1 AV1-IN FOR VIDEO1 IN
2 GND GND
3 AV2-IN FOR VIDEO2 IN
4 GND GND
5 S-CIN FOR C-IN
6 GND GND
Model No.: LCT-32HSSTP
Version: 1.0
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P40
ITEM NAME FUNCTION
1 PWM PWM Dimming
2 APWM Analog PWM dimming
3 ON/OFF Backlight On~Off: 2.4-5.0V On
0-1V Off
4 GND
5 RX0- LVDS signal
6 RX0+ LVDS signal
7 GND
8 RX1- LVDS signal
9 RX1+ LVDS signal
10 GND
11 RX2- LVDS signal
12 RX2+ LVDS signal
13 GND
14 RCLK- LVDS clock signal
15 RCLK+ LVDS clock signal
16 GND
17 RX3- LVDS signal
18 RX3+ LVDS signal
19 GND
20 N.C.
21 N.C.
22 N.C.
23 GND
24 GND
25 GND
26 Panel_power Module power
27 Panel_power Module power
28 Panel_power Module power
29 Panel_power Module power
30 Inverter_power Inverter logic power
Model No.: LCT-32HSSTP
Version: 1.0
SIGNAL DIAGRAM
SCART1
SCART2
TUNER
A1
U401
U400
VPC3230
U703
SDA5550M
DV1
VGA
YPBP
N1
MSP3410
N4
TDA7266B
N5
LM358
U500
GM1501
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SPEAKER
SPEAKER
EARPHONE
PANEL
U702
PI5V330
Model No.: LCT-32HSSTP
Version: 1.0
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