Rolsen RL-20S10 User manual

RL-20S10 SERVICE MANUAL PAGE:1
COLOR TFT-LCD TV
SERVICE MANUAL
MODEL : RL-20S10
CAUTION !!
BEFORESERVICINGTHETFT-LCDTV,
READTHE SAFETY PRECAUTIONS IN THIS MANUAL.

RL-20S10 SERVICE MANUAL PAGE:2
CONTENTS
Contents ------------------------------------------------------------------------ 2
Safety Precautions ---------------------------------------------------------- 3
Servicing Precautions ------------------------------------------------------ 4
Specifications ----------------------------------------------------------------- 5
Control Descriptions -------------------------------------------------------- 9
External In/Out Ports ------------------------------------------------------- 12
Adjustment -------------------------------------------------------------------- 13
Block Diagram ---------------------------------------------------------------- 17
Schematic Diagram --------------------------------------------------------- 18
Wave Form --------------------------------------------------------------------- 19
Troubleshooting -------------------------------------------------------------- 25
Replacement Parts List ---------------------------------------------------- 29
PCB Layout -------------------------------------------------------------------- 37
Exploded View ---------------------------------------------------------------- 43

RL-20S10 SERVICE MANUAL PAGE:3
SAFETY PRECAUTIONS
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
!! 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.

RL-20S10 SERVICE MANUAL PAGE:4
SERVICING PRECAUTIONS
CAUTION!!
Before servicing receivers covered by this service manual, read and follow the SAFETY
PRECAUTIONS on page 3 of this publication.
General Servicing Precautions
1.Always unplug the receiver AC power cord from AC power source before;
ⓐRemoving or reinstalling any component, circuit board module or any other receiver assembly.
ⓑDisconnecting or reconnecting any receiver electrical plug or other electrical connection.
ⓒConnecting a test substitute in parallel with an electrolytic capacitor in the receiver.
CAUTION!! A wrong part substitution or incorrect polarity installation of electrolytic capacitors
may result in an explosion harzard.
2.Do not spray chemicals on or near this receiver or any of its assemblies.
3.Do not defect any plug/socket voltage interlocks with which receivers covered by this service
manual might be equipped.
4.Always connect the test receiver ground lead to the receiver chassis ground before
connecting the test receiver positive lead. Always remove the test receiver ground lead last.
5.Do not connect the test fixture ground strap to power supply heatsink in this receiver
Electrostatically Sensitive(ES) Devices
Some semiconductor(solid state) devices can be damaged easily by static electricity. Such
components commonly are called Electrostatically Sensitive(ES) Device.Examples
Circuit Board Foil Repair
Excessive heat applied to the copper foil of any printed circuit board will weaken the adhesive
that bonds the foil to the circuit board causing the foil th separate from or “lift-off” the board.
The following guidelines and procedures should be flollowed whenever this condition is
encountered.
At IC Connections
To repair a defective copper pattern at IC connections use the following procedure to install a
jumper wire on the copper pattern side of the circuit board.(Use this technique only on IC
connections.)
1.Carefully remove the damaged copper pattern with a sharp knife.(Remove only as much
copper as absolutely necessary.)
2.Carefully scratch away the solder resist and acrylic coating(if used) from the end of the
remaining coopper pattern.
3.Bend a small “U” in one end of a small guage jumper wire and carefully crimp it around the IC
pin.
4.Route the jumper wire along the path of the out-away copper pattern and let it overlap the
previously scraped end of the good copper pattern. Solder the overlapped area and clip off any
excess jumper wire.

RL-20S10 SERVICE MANUAL PAGE:5
SPECIFICATIONS
Note: Specifications and others are subject to change without notice for improvement.
1.Scope.
This document is the specification of 20.1” TFT-LCD Color TV.
2.Power
1) Power requirement
DC 15V / 4.5A
2)AC / DC Adapter.
Input Frequency : 50/60㎐±3㎐
Input Voltage : AC 100V ～AC 230V (±10%)
Output Voltage : DC 15V
3)Power cord
Use UL listed and CSA certified detachable power cord type ;SVT, 3-conductors, 18AWG
For AC 120V area. Use VDE listed detachable power cord type ;HO5VV-F, 3-conductors,
18AWG for AC 220～240V area.
3.Tuning system
FVS 100
4.Sound output
3W+3Wrms Stereo (Max)
5.Antenna input impedance
VHF / UHF at 75ohm
6.OSD Type (On Screen Display)
Windows type (Center)
7.External in/output
PC/DTV,SCART, Head Phone, S-Video, AV,
Audio In : 0.4Vrms, over 10KΩ
Video In : 1Vp-p, over 75Ω
PC/DTV In: 0.7Vp, over 75Ω
8.Function
CATV/Hyper band
Auto Program
Manual Program
Auto Sleep
Quick view
PSM(Picture Status memory)
SSM(Sound Status memory)

RL-20S10 SERVICE MANUAL PAGE:6
SPECIFICATIONS
9.Receiving RF TV system
NO
Model System RL-20S10 / /
1 PAL-B ○/ /
2 PAL-G ○/ /
3 PAL-I, I /I ○/ /
4 PAL-D ○/ /
5 PAL-K ○/ /
6 SECAM-B ○/ /
7 SECAM-G ○/ /
8 SECAM-D ○/ /
9 SECAM-K ○/ /
10 SECAM-K1 ○/ /
11 SECAM-I (6.0) ○/ /
12 NTSC-3.58 / 4.5 ○/ /
13 NTSC-3.58 / 5.5 ○/ /
14 NTSC-3.58 / 6.0 ○/ /
15 NTSC-3.58 / 6.5 ○/ /
16 NTSC-3.58 / 4.5(5.0) ○/ /
17 NTSC-4.43 / 5.5 ○/ /
18 NTSC-4.43 / 6.0 ○/ /
19 NTSC-4.43 / 6.5 ○/ /
20 PAL 5.5 / 60Hz ○/ /
21 PAL 6.0 / 60Hz ○/ /
22 PAL 6.5 / 60Hz ○/ /
23 SECAM 5.5 / 60Hz ○/ /
24 SECAM 6.0 / 60Hz ○/ /
25 SECAM 6.5 / 60Hz ○/ /
26 SECAM L / L' X //
TOTAL SYSTEM 25 //

RL-20S10 SERVICE MANUAL PAGE:7
SPECIFICATIONS
10.Receiving function & Programme
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
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
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 5.5MHz/60Hz
23 SECAM 6.0MHz/60Hz
24 SECAM 6.5MHz/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/Video disk
player
NTSC 3.58/4.5MHz/60Hz onl
y
Play-back for special
Video Tape Recorder
Reception of broadcast
and play-back for Video
Tape Recorder
VHF Band
NTSC-M (US) : 2-13
NTSC-M (JAPAN) : 1-12
UHF Band
NTSC-M (US) : 14-78
NTSC-M (JAPAN) : 13-62
Play-back for special
Video Tape Recorder NTSC 3.58/4.5MHz/60Hz onl
y

RL-20S10 SERVICE MANUAL PAGE:8
11. PC/DTV Mode Scan Frequency & Timing
1)Scan Freq : H: 31 ～56kHz / V:56 ～85㎐
2)Preset Timing Chart
Mode Resolution H-Freq(Khz) V-Freq(Khz)
VGA
640x480
640x480
640x480
640x480
720x400
31.5KHz
37.9KHz
37.5KHz
43.3KHz
31.5KHz
60Hz
72Hz
75Hz
85Hz
70Hz
SVGA
800x600
800x600
800x600
800x600
800x600
35.1KHz
37.9KHz
48.1KHz
46.9KHz
53.7KHz
56Hz
60Hz
72Hz
75Hz
85Hz
DTV 1920x1080i
1280x720i
720x480p
33.8KHz
45KHz
31.5KHz
60Hz
60Hz
60Hz
Note!! :
ⓐIf the set is cold, there may be a small “flicker” when the set is switched on. This is
Normal, there is nothing wrong with the set.
ⓑif possible, use the VESA 640x480 PC video mode to obtain the best image quality for
your LCD TV. If used under the other resolutions, some scaled or processed pictures may
appear on the screen.
ⓒsome dot defects may appear on the screen, like Red, Green or Blue spot. However, this
will have no impact or effect on the monitor performance.
12. TFT – LCD Panel Character
1) Feature
Size :20.1"Diagonal(51Cm)
LCD Type :Color Active Matrix TFT
Pixel Pitch :0.6375 mm x 0.6375 mm
Pixel Format :640x480 Pixels, RGB Stripe
Active Video Area :408mm(H) x 306mm(V)
Surfacetreatment :Anti-Glare, Hard coating(3H)
Response Time(Typ) :25mS(Typ)
Viewing Angle<CR≥10> : Hor [Left/Right] Æ88Deg (Typ) / 88Deg (Typ),
Ver [High(Top)/Low(Bottom)] Æ88Deg (Typ) / 88Deg (Typ)
Luminance(Typ) : 450 cd/㎡(Typ)
Contrast Ratio(Typ) : 350(Typ)
Display Color : 16,777,216 Color
BackLight :6CCFL
SPECIFICATIONS

RL-20S10 SERVICE MANUAL PAGE:9
CONTROL DESCRIPTIONS
All the function can be controlled with the remote controller.
Some functions can also adjusted with the buttons on the controls on the TV front panel.
Remote controller
Note !! : 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:
Select Programme numbers.
4.PSM (Picture Status Memory):
Recalls your preferred picture setting.
5.SSM (Sound Status Memory):
Recalls your preferred sound setting.
6. I / II:
Selects the language during dual
language broadcast. / Selects the
sound output.
7.MENU:
Displays a main menu.
8.TV / AV:
Selects input signal source.
/ Clears the menu from the screen.
9.SLEEP:
Sets the sleep timer.
10.TV / PC :
Selects TV or PC mode directly.

RL-20S10 SERVICE MANUAL PAGE:10
CONTROL DESCRIPTIONS
Remote controller
Note !! : Before you use the remote controller, please install the batteries.
11.PR ▲▼ ( Programme Up/Down):
Selects a next programme or a menu
item.
12.VOL ◀▶ ( Volume Up/Down):
Adjusts the sound level or a menu
Setting.
13.OK:
A
ccepts your selection or displays the
current mode.
14.Q.VIEW:
Returns to the previously viewed
Programme.
15. TELETEXT Buttons:
These buttons are used for Teletext.
For further details, see the Teletext
selection.

RL-20S10 SERVICE MANUAL PAGE:11
CONTROL DESCRIPTIONS
Controller of Panel
< SIDE VIEW>
1.ON/OFF:
Switches TV set on or off.
2.MENU:
Display a menu.
3.+ PR -( Programme Up/Down):
Selects a programme or a menu item.
4.+ VOL -( Volume Up/Down):
Adjusts the volume.
Adjusts menu settings.
5.TV/AV:
Selects input signal source.
Clears the menu from the screen.
6:POWER INDICATOR:
Illuminates red when the TV is in-
power standby mode.
Illuminates green when the TV is-
switched power on mode.
Illuminates amber when the TV is-
switched power saving mode.
7.REMOTE CONTROL SENSOR:
Accepts the IR signal of remote
controller.
◎
◎

RL-20S10 SERVICE MANUAL PAGE:12
EXTERNAL IN/OUT PORTS
External IN / OUT
1.DC15V: Connection point for the external DC power supply.
2.PC/DTV IN: PC or STB D-type connector Input.
3.COMPONENT IN (Y,Cb,Cr): Component video & audio input.
3.COMPONENT IN (L, R): Component audio input.
4.H/P: Stereo Headphone output.
5.S-VIDEO: S-video input.
6.A/V-IN: VCR video & audio input.
7.A/V-OUT: VCR video & audio output.
8.ANT: CATV/AIR RF cable input.

RL-20S10 SERVICE MANUAL PAGE:13
ADJUSTMENT
1.Safety Precautions
1. Never disconnect leads while the TV receiver is on.
2. Don't short any portion of circuits while power is on.
3. The adjustment must be done by the correct appliances. But this is changeable in view
of productivity.
4. Unless otherwise noted, set the line voltage to 230Vac 10%, 50Hz ./ 110Vac, 60Hz
2.Test Equipment required
1. RF signal generator (with pattern generator)
2. Multi meter (volt meter)
3. Oscilloscope
4. LCD Color analyzer
3.RF AGC (Automatic Gain Control) Adjustment
Note!! Adjust a RF AGC of world standard tuner only.
2 in 1 tuner need not AGC adjust.
The RF AGC was aligned at the time of manufacture for optimum performance over a wide
range conditions. Readjustment of RF AGC should not be necessary unless unusual local
conditions exist, such as ;
1) Programme interference in a CATV system.
2) Picture bending and/or color beats, which are unusually due to excessive RF signal
input when the receiver is too close to a transmitting tower or when the receiver is
connected to an antenna distribution system where the RF signal has been amplified. In
this case, the input signal should be attenuated (with pad or filter) to a satisfactory level.
3) Picture noise caused by "broadcast noise" or weak signal. If the broadcast is "clean"
and the RF signal is at least 1mV (60dBu), the picture will be noise free in any area.
Adjusting RF AGC to one end of rotation will usually cause a relatively poor signal to noise
ratio; Adjusting to the other end of rotation will usually cause a degradation of over load
capabilities resulting in color beats or adjacent Programme interference.
Adjustment Note!!
1. Connect RF signal (65dB± 0.5dB) and turn on the TV.
2. Press MENU buttons on TV set and Remote Controller at the same time to get into
SVC mode.
3. Press YELLOW button on the Remote Controller several times to find AGC.
4. Press Volume UP/DOWN button until the AGC Voltage is the same as the Table
below.
5. Press OK button to memorize the data.
6. Press TV/AV button to exit SVC mode.

RL-20S10 SERVICE MANUAL PAGE:14
ADJUSTMENT
4.SVC Data Adjustment
NOTE!! When the EEPROM has been replaced, the SVC data should be restored as the
function of individual system and specification.
1) Press 5 Seconds MENU buttons on both TV set and Remote Controller at the same
time to get into SVC mode.
2) Press the Yellow button several times to find SVC Data.
3) Input the corresponding SVC data referring to Table below with the Volume Up/down
key.
4) Press the OK button to memorize the data.
5) Press TV/AV button to exit SVC mode
5.SVC Data Table
PAGE ITEM VALUE1 VALUE2 REMARK
AGC 20
Variable Data(0-31)
RD 80 PC Contrast Coefficient-RED(0-255)
GD 80 PC Contrast Coefficient-GREEN(0-255)
BD 80 PC Contrast Coefficient-BLUE(0-255)
RO 32 PC Brightness Coefficient-RED(0-63)
GO 32 PC Brightness Coefficient-GREEN(0-63)
BO 32 PC Brightness Coefficient-BLUE(0-63)
S-B 20 PC Sub-Brightness(0-31)
PC CP 0 PC Charge Pump(0-7)
DATA 1
50 PR * * means current program NO.
FP 21
FM Prescaler(0-127)
NP 89 NICAM Prescaler(0-127)
SP 50 SCART Prescaler(0-127)
S1 VOL 105 SCART1 Volume(0-127)
S2 VOL 105 SCART2 Volume(0-127)
DATA 2
50 PR * * means current program NO.
0 100PR
200PR 0 1 200PR
0 Not apply to TEXT
TEXT 1
1 Apply to TEXT
0 TELETEXT TOP OFF
TOP 1
1 TELETEXT TOP ON
0 Apply to COMPONENT
SCART 0 1 Apply to SCART
0 Not apply to ACMS
ACMS 1 1 Apply to ACMS
0 Used except for CHINESS or AUSTRALIA
CH+AU 0 1 Used CHINESS or AUSTRALIA
0 BG/I/DK
1 BG/I/DK/L
SYS 2
2 BG/I/DK/M
50 PR * * means current program NO.
DATA 3
106 Opt 1 Translate HEX into DEC(DATA3VALUE1)

RL-20S10 SERVICE MANUAL PAGE:15
ADJUSTMENT
5-1.SVC Data Table
PAGE ITEM VALUE1 VALUE2 REMARK
0 Not apply to DUAL option
DUAL 0 1 Apply to DUAL option
0 Not apply to MONO option
MONO 0 1 Apply to MONO option
0 Not apply to NICAM STEREO option
A2 ST 1 1 Apply to NICAM STEREO option
0 Sound curve option 1
VOL 1 1 Sound curve option 2
0 Not apply to YUV / SCART
AV1 1
1 Apply to YUV OR SCART
0 6-KEY Key option
KEY 0
1 4-KEY
0 ENG ONLY ENGLISH ONLY
1 EU-5EA
ENGLISH/GERMAN/FRANCE/ITALY/
SPAIN
2 EU CIS EU-5EA + CIS
3 E+CHINA ENGLISH + CHINESS
4 E+HUNGARY ENGLISH+ HUNGRAY
5 RESERVED
6 RESERVED
LANG 2
7 RESERVED
0 WEST EU
WEST EU U.K/GERMAN/FRANCE/
ITALY/SPAIN/SWEDEN/CZECH
Rep./NORWAY etc
1 EAST EU1 POLAND/SLOVENIA/ROMANIA etc
2 TURKEY EU TURKEY
3 EAST EU2 HUNGRY/SERVIA
4 CYRILLIC1 ESTONIA
5 CYRILLIC2 ESTONIA
6 CYRILLIC3
RUSIA/UKRAINE/ESTONIA/CROATI
A/KAZAKHSTAN
7 TURK GRE1
8 TURK GRE2
9 TURK GRE3 TURKEY/GREECE
10 ARAB ERA
11 ARAB ENG ARAB CULTURE
12 ARAB HEB1
13 ARAB HEB2 ARAB/HEBREW
14 FARS ENG PARSI
15 FARS FRA
T-LAN 6
16 FARS ALL
50 PR * * means current program NO.
DATA 4
57 Opt 2
Translate HEX into DEC(DATA4)

RL-20S10 SERVICE MANUAL PAGE:16
ADJUSTMENT
6.AGC Adjustment (SVC Data 1)
Note!! Adjust a RF AGC of world standard tuner only.
2 in 1 tuner need not AGC adjust.
1) Connect RF signal (65±, 0.5dB㎶) and tune on the TV.
ÎStandard adjustment programme
- 07CH (frf= 175.25MHZ)
2) Press 5 seconds MENU buttons on TV set and Remote controller at the same time to
get into SVC Data.
3) Press the Programme up/down button on the Remote Controller several times to find
AGC??
6) Press the volume up/down button until the AGC voltage is the same as Table below.
7) Press OK button to memorize the data.
Test point : AGC pin of Tuner
Adjust : Remote Controller

RL-20S10 SERVICE MANUAL PAGE:17
BLOCK DIAGRAM
Block Diagram

RL-20S10 SERVICE MANUAL PAGE:19
WAVE FORM
NOTE!!:ⓐVideo = Gray scale pattern input / Audio = 1Khz input at volume step 40.
ⓑYou can find number from Schematic Diagram
1)Component Y input,
(1V-p-p, Input = Vertical color pattern) 2)Component Cb input, (0.7V-p-p, Input = Vertical color pattern)
3) Component Cr input,
(0.7V-p-p, Input = Vertical color pattern) 4) S-video C signal input.
5) S-video Y signal input.(15.7Khz,1Vp-p) 6) CVBS Video signal input.(15.7Khz,1Vp-p)

RL-20S10 SERVICE MANUAL PAGE:20
WAVE FORM
NOTE!!: Video = Gray scale pattern input / Audio = 1Khz input at volume step 40.
7) CVBS Video signal output.(15.7Khz,1Vp-p)
8) Q605 Emitter (Audio “L” output)
9) Q606 Emitter (Audio “R” output) 10)IC101 IR signal input
11) Tuner sound IF output (4.5Mhz) 12)Tuner mono audio output