Rolsen LT-30FEP, LT-30FLP, LT-30FTP Service manual
30” WIDE TFT-LCD TV
SERVICE MANUAL
CHASSIS:
MODEL: LT-30FEP / LT-30FLP / LT-30FTP
CONTENTS
Contents ................................................................................................................ 2
Safety Precautions ............................................................................................3
Specifications ..................................................................................................... 4
Control Descriptions ....................................................................................... 6
Adjustment...........................................................................................................9
Troubleshooting..................................................................................................11
Disassembly Instructions ..............................................................................13
Replacement Parts List ............................................................................... 19
Schematic Diagram ......................................……………………….............................26
PCB Printings ............................................................................……………27
2
SAFETY PRECAUTIONS
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 replaced with the same components as
recommended in this manual to prevent Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
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/10watt resistor in parallel with a 0.15uF capacitor between a known good earth ground (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 into the AC outlet and repeat AC voltage measurements 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 and repaired before it is returned to the customer.
Leakage Current Hot Check circuit
3
SPECIFICATIONS
Note: Specifications and others are subject to change without notice for improvement.
1. Power requirement:
‥AC 110-240V, 50/60Hz (Cold SMPS)
/ DC 24V ADAPTOR
2. Tuning system:
‥FVS, 100 program memory
3. Sound output:
‥105W+10W
4. Intermediate Frequency (IF):
‥Vision IF ; 38.9MHz
‥Color IF ; 34.47MHz(PAL) / 35.32MHz(NTSC)
‥Sound IF ; 33.4MHz (B/G) / 32.9MHz(I,I/I) /
32.4MHz(D/K, K1) / 34.4MHz(M)
5. Power consumption:
‥130W(3W-ST-BY)
6. Antenna input impedance:
‥VHF/UHF 75ohm , TIF
7. Voice coil impedance:
‥4ohm option
8. OSD (On Screen Display):
‥Window Type
Receiving system
No.
System
1 PAL-B O O O
2 PAL-G O O O
3 PAL-I, I/I O O O
4 PAL-D O O O
5 PAL-K O O O
6 SECAM-B O O O
7 SECAM-G O O O
8 SECAM-D O O O
9 SECAM- K O O O
10 SECAM-K1 O O O
11 SECAM-I (6.0) O O O
12 NTSC-3.58/4.5 X X O
13 NTSC-3.58/5.5 X X O
14 NTSC-3.58/6.0 X X O
15 NTSC-3.58/6.5 X X O
16 NTSC-3.58/4.5(5.0) X X O
17 NTSC-4.43/5.5 X X O
18 NTSC-4.43/6.0 X X O
19 NTSC-4.43/6.5 X X O
20 PAL 5.5/60HZ O O O
21 PAL 6.0/60HZ O O O
22 PAL 6.5/60HZ O O O
23 SECAM 5.5/60HZ O O O
24 SECAM 6.0/60HZ O O O
25 SECAM 6.5/60HZ O O O
26 SECAM L/L’ X O X
TOTAL SYSTEM 17 18 25
Model No.
9. External in/output: Headphone, SCART or
Phone Jack: Option
‥Audio-In ; 0.4Vrms, over 10Kohm
‥Video-In/Out ; 1Vp-p,over 75ohm
‥R.G.B In ; 0.7Vp-p
10. Function:
‥CATV/Hyper band
‥Auto Program
‥Manual Program
‥Auto Sleep
‥Recall
‥Quick view
‥ACMS(Auto channel Memory System)
‥PSM(Picture Status memory)
‥SSM(Sound Status memory)
‥PIP(PICTURE I RICTURE)
‥ARC(ASPECT RATIO CONTROL)
LT-30FEP LT-30FLP LT-30FTP
4
TABLE1. RECEIVING SYSTEM (26 SYSTEM)
No.
Receiving System Function Receiving Channel
1 PAL-B
2 PAL-G
3 PAL-I, I/I
4 PAL-D
5 PAL-K
6 SECAM-B
7 SECAM-G
Reception of broadcast
and play-back for Video
Tape Recorder
8 SECAM-D
9 SECAM- K
10 SECAM-K1
11 NTSC-M
12 SECAM-L/L’
13 NTSC-4.43/5.5
14 NTSC-4.43/6.0
15 NTSC-4.43/6.5
Play-back for special
Video Tape Recorder
16 SECAM-I (6.0MHZ)
17 SECAM-L (VIDEO IN)
18 NTSC 3.58/4.5MHZ/50HZ
19 PAL 5.5MHZ/60HZ
20 PAL 6.0MHZ/60HZ
21 PAL 6.5MHZ/60HZ
22 SECAM 5.5 MHZ /60HZ
Play-back for special
Video Tape/Video disk
player
23 SECAM 6.0 MHZ /60HZ
24 SECAM 6.5 MHZ /60HZ
25 NTSC-3.58/5.5MHZ
26 NTSC-3.58/6.0MHZ
27
NTSC-3.58/6.5MHZ
Play-back for special
Video Tape Recorder
VHF Band
PAL/SECAM-B: 2-12
PAL/SECAM-D: 1-12
SECAM-K1: 2-9
NTSC-M (US): 2-13
NTSC-M (JAPAN): 1-12
UHF Band
PAL/SECAM-G: 21-69
PAL-I: 21-69
SECAM-K: 21-69
PAL-K: 13-56
NTSC-M (US): 14-78
NTSC-M (JAPAN): 13-62
5
CONTROL DESCRIPTIONS
All the functions can be controlled with the remote control handset.
Some functions can also be adjusted with the buttons on the front panel of the set.
Remote controller
Before you use the remote controller, please install the batteries.
1. POWER
Turns the TV on from standby or off to standby mode.
2. MUTE
Turns the sound on and off.
3. NUMBER buttons
Selects programme numbers.
4. PSM (Picture Status Memory)
Recalls your preferred picture setting
5. SSM (Sound Status Memory)
Recalls your preferred sound setting
8. TV/AV
Selects TV, SCART, VIDEO, S-VIDEO or PC mode.
Clears the menu from the screen.
7. MENU
Displays a main menu.
6. I/II
Selects the language during dual language broadcast.
Selects the sound output.
9. SLEEP
Sets the sleep timer.
10. TV/PC
Selects TV or PC mode directly.
11. PR▲▼ (Programme Up/Down)
Selects next programme or a menu item.
12. VOL◀▶ (Volume Up/Down)
Adjusts the sound level.
Adjusts menu settings.
13. OK
Accepts your selection or displays the current mode.
14. TELETEXT Buttons
These buttons are used for TELETEXT.
For further details, see the ‘TELETEXT’ section.
15. Q.VIEW
Returns to the previously viewed programme.
Note: In TELETEXT mode,
The Q.VIEW button is used for TELETEXT function.
16. PIP
Displays a PIP(Picture In Picture).
17. ARC
Selects a screen mode-, 16:9, 14:9, ZOOM 1:1 and Auto Wide.
18. INPUT
Selects the AV source of sub picture in PIP mode.
19. POSITION
Selects a position of PIP.
20. SWAP
Switches a main picture for sub picture.
21. MODE
Selects a PIP screen mode. – 16:1, 9:1, double window and scan mode
22. ▼ ▲
Selects a programme when RF signal is displayed in PIP mode.
6
CONTROL DESCRIPTIONS
Battery installation
▶Inserting batteries
1. Remove the battery cover by pulling it upward in the direction shown by the arrow.
2. Insert the batteries with correct polarity (“+" to "+", and "-" to "-”).
3. Replace the battery compartment cover.
* Install two high-quality 1.5V "AAA" alkaline batteries. Don't mix old batteries with new batteries.
*Remove batteries when you won't use the remote controller for long time. Liquid leakage from old batteries
may cause operation failure.
Notes for using remote controller
• Make sure there are no objects between the remote controller and its sensor.
• Don't place the remote control near a heater or in damp place. Strong impact to the remote control may
cause operation failure.
• Signal from the remote control may be disturbed by sunlight or other bright light. In this case, darken the
room or move the TV.
7
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