How it Works
Admiral
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LTW32AC
Schematic
62 pgs2.41 Mb0

Admiral LTW32AC Schematic

LTW32AC/DF-SERVICE
MANUAL
SERVICE
2
1. PRECAUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Important Safety Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Leakage Current Hot Check . . . . . . . . . . . . . . . . . . . . . . . 3
3. Location & Function of Control (LTW32AC) . . . . . . . . . . . . . . 5
Location & Function of Control (LTW32DF) . . . . . . . . . . . . . . 6
4. Remote Control Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5. ALIGNMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6. Technical Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1) IC501 : SVP-EX52(Trident) . . . . . . . . . . . . . . . . . . . . . . 9
2) IC001 : M30620 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3) IC002 : EN29LV040A . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4) IC01 : TEA6425 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5) IC09 : MSP3420G . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6) IC402 : NJM2235 (Only LTW32AC) . . . . . . . . . . 27
7) IC661, IC662 : MP7720 . . . . . . . . . . . . . . . . . . . . . . . 28
8) IC982 : MST9883 . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
9) IC663 : TDA1517 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
10) IC511 : HY5DU283222AQP . . . . . . . . . . . . . . . . . . . . 33
7. TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
No Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
No Picture (Sound OK) . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
No Sound . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
8. BLOCK DIAGRAM (LTW32AC) . . . . . . . . . . . . . . . . . . . . . . 38
BLOCK DIAGRAM (LTW32DF) . . . . . . . . . . . . . . . . . . . . . . . 39
9. PCB LAYOUT(LTW32AC) . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
PCB LAYOUT(LTW32DF) . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
10. PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
11. CRICUIT DIAGRAM
MANUAL
SERVICE
3
AC VOLTMETER
Good earth ground such as a water pipe, con­duit etc.
To instrument`s exposed METALLIC PARTS
Important Safety Notice
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the Schematic Diagram and Replacement Parts List. It is essential that these special safety parts should be relpaced with same components as Recommended in this manual to prevent Shock, or File, or other Harzards. Do not modify the original design without permission of menufacturer.
Leakage Current Hot Check (See Below Figure)
Plug the Ac cord directly into the Ac outlet. Do not use a line Isolation Transformer during this check. Connect 1.5k/10 watt resistor in parallel with a 0.15uF capacitor between a known good earth groung (Water pipe, Conduit, etc) and the exposed metallic parts. Measure the AC voltage across the resistor using AC voltmeter with 1000 ohms/volt or more sensitivity. Reverse plug of the AC cord info the AC outlet and repeat AC voltage mresurements for each exposed metallic part. Any voltage measured must not exceed 0.75 volt RMS, which is, corresponds to 0.5mA. In case any measurement is out of the limits specified, there is possibility of shock hazard and the set must be checked repaired before it is returned to the customer.
Panel Type Display Area Display Color Pixel Pitch Resolution Contrast Ratio Brightness Viewing Angle Scanning Frequency
PC
Video
Audio
Antenna Color System Receiving System Stereo Type
Certifications Power Consumption Speaker Plug & Play Screen Control Weight
Power Supply Remote Controller Dimension
SPECIFICATION 32" WXGA
MANUAL
SERVICE
4
Panel
In/Out
TV Signal
Others
TFT Color LCD
697.685 x 392.256mm
16.7 million
0.17 x 0.51 x RGB mm 1366 x 768 500:1 (Typical) 500cd/m
2
H:176 V:176 H:31-69KHz V:56-85Hz
Analog RGB 15 pin D-sub
S-Video In Video Input HDTV (Y,Pb,Pr) Input
Composite Input PC Input Head-phone Out HDTV input
75 ohm Coaxial cable M, M/N TRI(NTSC/PAL M/N) MTS, Surround
IEC60065 116W 10W x 10W DDC 1/2 B On Screen Display Menu Net 21.5Kg / Gross 23Kg Net 21Kg / Gross 24.5Kg AC 100-250V~ Yes 1017 (W) x 631 (H) x 295 (D)
807.6 (W) x 643 (H) x 243 (D)
MANUAL
SERVICE
5
WARNING : TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS TELEVISION
TO RAIN OR MOISTURE
REAR
1. POWER ON/OFF AC turns ON/OFF
2. STAND BY The color of LED is changed into RED.
3. ON The color of LED is changed into GREEN.
4. Remote Control Sensor
5. TV/VIDEO Display a menu of the available input sources.
6. MENU Display the main on-screen menu.
Exit from sub-menu.
7. VOL(+/-) Press the increase or decrease the volume.
Also used to increase or reduce the value of
a menu option.
8. CH(
/ ) Press CH or CH to change channels.
Also used to highlight selections on the
on-screen menus.
9. POWER Sub Power ON/OFF
1
2
3
4
6
7
5
8
9
1. PC AUDIO Connects to the sound-output port of a
personal computer
2. PC D-SUB Used to connect a video signal from
a personal computer
3. HDTV INPUT Video signals from a HDTV player
4. AV OUTPUT Used to connect a video signal from a
VTR or DVD
5. AV INPUT Video signals from a VTR or DVD player
6. S-VIDEO S-Video signal from an VCR or laserdisc player
7. RS-232C JACK Do not use this jack for customers
8. HEAD PHONE Connect to an head phone
9. ANTENNA JACK Connect to an antenna or a cable TV system
FRONT
MANUAL
SERVICE
6
A
B
A
1. TV/VIDEO Display a menu of the available input sources.
2. MENU Display the main on-screen menu.
Exit from sub-menu.
3. VOL(-/+) Press the increase or decrease the volume.
Also used to increase or reduce the value of
a menu option.
4. CH(
/ ) Press CH or CH to change channels.
Also used to highlight selections on the
on-screen menus.
5. POWER Sub power switch
6. STAND BY The color of LED is changed into RED.
7. ON The color of LED is changed into GREEN.
8. Remote Control Sensor
9. POWER ON/OFF Turns ON/OFF the LCD TV/Video
H/P
1. ANTENNA JACK Connect to an antenna or a cable TV system
2. AV OUTPUT Used to connect a video signal from a VTR or DVD
3. HEADPHONE Connect to an head phone
4. A/V IN Audio signals from VCR or similar device.(Audio input
of A/V IN is used commonly with SVHS)
5. S-VIDEO S-Video signal from an VCR or laserdisc player
6. HDTV INPUT Video signals from a HDTV player
7. PC D-SUB
Used to connect a video signal from a personal
computer
8. PC AUDIO
Connects to the sound-output port of a personal
computer
9. RS-232C JACK Do not use this jack for customers
10. AC INLET
Use 100-250V AC, 50/60 Hz.
To prevent electrical shocks and fire hazards, do not
use any other power source.
B
REAR
FRONT
MANUAL
SERVICE
7
Point to remote control sensor of the TV set. The maximum operable distance is approximately 20 feet from the remote control sensor, and not more than 30 to either side of center. The operation of the remote control is most effective when there is nothing between it and the remote control sensor. The duration of the batteries is approximately 6 months to 1 year. Replace the batteries when the remote operation becomes unstable.
BA TTERY INSTALLA TION
The battery compartment is located beneath the sliding cover. Press the indentation and lift up the cover while sliding it down. Correctly install the batteries, observing polarities as shown in the compartment. Do not use a combination of old and new batteries or batteries of different types. If batteries become exhausted, remove and replace them soon. When battery leakage occurs, clean the battery compartment with a soft cloth and replace the batteries.
}
}
Power Button Screen Adjust Button
100 Button AV Select Button
OSD Menu select Button
TV/CATV Button Add/Delete Button
Size Button
Channel Up( )/down( ) Button
Sound Standard Button Auto Adjust Button
MTS Button
Picture Standard Button
CCD Button
Volume Up(+)/Down(-) Button
Display Button
PC/TV Button
Source Button
Quick View Button
Sleep Button
Mute Button
Number Button
MANUAL
SERVICE
8
FACTORY
1. This mode uses the standard remote control. In the stand-by mode. Press display + MENU + 3 + 8 + Power(on) button on the remote controller in --> sequence
2. The factory mode will be displayed. The factory mode has three components: Set option, Vol. Test, Service 1, Service2, Option 1, Option 2, EEPROM Reset.
3. Access the adjustment mode by pressing the VOLUME keys (+/-). The adjustment parameters adjusted are listed in the accompanying table, and they are selected by pressing the CH keys (
.
4. The VOLUME keys increase or decrease the adjustment values.
1. Set Option
2. Vol. Test
3. Service 1
4. Service 2
5. Option 1
6. Option 2
7. EEPROM Reset
32LPL 32AUO 42LPL Min Max Contrast Brightness Color PC Contrast Half Tone (OFF, STEP1~3) Language CCD V-Chip Video Mute Init. Mode No sig. P Off MTS (AUTO, Manual)
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SERVICE
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[1] IC501 : SVP-EX52(Ttrdent)
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