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SERVICE MANUAL

MODEL: 14TS1020
CHASSIS: 3P68S
EN 1 1. 3P68S Technical Specifications, Connections, and Chassis Overview

1. Technical Specifications, Connections,and Chassis Overview
Index of this chapter
Technical Specifications
Connection Overview
Chassis Overview

Note: Data below can deviate slightly from the actual situation, due to the different set executions.
1.1.Technical Specifications

TV PRODUCT FEATURE LIST

3P68S(14" CRT
Chassis
TV)
CRT Size 14" Ultra Slim
Main IC. TDA11145
Main PCB Size 197*250
NTSC-M/PAL-
Color Standard
M/N
Sound Receiver M,N
System (AV) PAL/NTSC
System AC100-240V
Power Source
50/60Hz
Power Standby 1W
Maximum Power < 60W
PRESET CHANNEL 181CH
TUNER TYPE FS
75 Ohm
Antenna Input
(Unbalance)
COM.FILTER NO
Double Window NO
Progressive Scan NO
Freeze NO
Zoom NO
SVM NO
Picture Screen saver NO
Blue Back YES
Noise Reduction No
Standard, Soft,
Pictures effect
Rich, User
Color Temperature NO
Black Extend YES
Nicam/A2 (with AV STEREO) NO
Tone control NO
Surround NO
MTS (with AV STEREO ) NO
SOUND Tone control NO
Surround NO
AV STEREO NO
Tone control NO
Surround NO
Technical Specifications, Connections, and Chassis Overview 3P68S 1. EN 2

MONO NO
Audio Output Power (MAX) 2W*1
Subwoofer Out NO
Mute YES
Sounds Effect NO
No signal auto standby 15 Mins
Timer Off/On YES
Sleep Timer YES
Rename channel NO
Favorite channel NO
Biological Clock NO
Calendar NO
Program prearrange NO
Child Lock YES
Quick view YES
Hotel mode NO
Clock YES
Features Game NO
CCD YES
V-Chip YES
High gain tuner NO
Customer Band Name (OSD) NO
Mode NO
Teletext Pages NO
X26 Packet NO

English, French,
OSD Language Portuguese,
Spanish

RCA Jack YES
SCART NO
AV In- (RCA) NO
AV Output NO
Jack in Side/Front Earphone Out NO
YUV NO
Terminals S-Video In NO
SCART NO
AV In-(RCA) 1
AV Output NO
Jack in Rear
Earphone Out NO
YUV NO
S-Video In NO
UL NO
Certification CB YES
CE/EMC NO
Other Handset RC13
EN 3 1. 3P68S Technical Specifications, Connections, and Chassis Overview

1.2. Connections
Connecting the Aerial(or Cable Television Network)

To view television channels correctly ,a signal
must be received by the set from one of the
following sources:
*An outdoor aerial
*A cable television network
75 ANT

Plug the aerial or cable network input cable to
Cable
Television
the 75 coaxial socket on the rear of the
Network television.

Audio/Video Input

VCR

Decoder/
video game device
VIDEO VIDEO

VIDEO Video disc player
AUDIO AUDIO

AUDIO
Camcorder

Satellite receiver
Technical Specifications, Connections, and Chassis Overview 3P68S 1. EN 4

PERIPHERAL EQUIPMENT CONNECTIONS

There is a wide range of audio and video equipment that can be connected to your TV.
Connection diagrams at the end of this section show you where the different equipment should be connected at the backside of the TV.
.
Aerial socket
1. Connect the RF out socket of the VCR to the aerial socket on the back of the set.
2. Connect the aerial cable to the RF aerial in socket of the VCR.
3. Select the program number where the VCR channel is stored.
4. Press the PLAY button on the VCR.

Audio/ Video in sockets
1. Connect the audio/video out sockets of the VCR to audio/video in sockets of the set.
2. Press the AV/TV button to select AV.
3. Press the PLAY button on the VCR.
The VCR playback picture appears on the screen.

Precautions when connecting to other equipments
When using external equipment with this TV, please read the instruction manual of the external equipment.
Switch off all power supplies to the equipment and TV before connection.
Always ensure that the input and output terminals are correctly connected..
3P68S 1. EN 5 Technical Specifications, Connections, and Chassis Overview

1.3. ChassisOverview CRT PANEL

MAIN POWER SUPPLY
CHASSIS
PANEL LINE DEFLECTION

FRAME DEFLECTION

TUNER IF

AV IN

AUDIO / VIDEO

CPU CONTROL

AUDIO AMPLIFIER
Safety Instructions 3P68S 2. EN6

2.Safety Instructions
2. 1. Power-supply cords should be routed so that they are not likely to be walked on or nagged by items placed
upon or against them. Pay particular attention to cords at doors, plugs, receptacles, and the point where they exit
from the product. When the power cord or plug is damaged or frayed, unplug the TV from the wall outlet and refer
servicing to your authorized dealer.
2. 2. Do not overload wall outlets, extension cords, or convenience receptacles on other equipment as this can result
in a risk of fire or electric shock.
2. 3. Unplug the TV product from the wall outlet before cleaning. Do not use liquid cleaners or aerosol cleaners. Use a
damp cloth for cleaning.
2. 4. If the TV should be dropped and/ or broken, it could result in an injury, and continued use could result in fire or
electrical shock. Immediately turn off the power switch, disconnect the power plug from the power outlet and contact
your authorized dealer.
2. 5. Do not insert liquids or foreign object. Penetration of liquids or foreign objects could result in fire or electrical
shock.
2. 6. Do not attempt to service the TV yourself. Opening or removing covers can expose you to high voltage and other
dangerous conditions. Refer all servicing to your authorized dealer.
2. 7. Do not place the TV on an unstable shelf, slant or vibrant surface. The TV may fall, causing serious injury to
human and serious damage to the appliance.
2. 8. Avoid dusty places, since accumulated dust inside the chassis may cause failure of the TV when in high humidity
environment.
2. 9. Do not place the TV near water. For example, a bathroom, a beach, etc.
2. 10. Do not obstruct the ventilation openings of the equipment with items such as newspapers, tablecloth, etc.
2. 11. Do not place the TV on a carpet, sofa or bedding.
2. 12. Keep the TV away from heat sources such as radiators, heaters, stoves and other heat generating products.
2. 13. Do not place the TV in a "built-in" enclosure, unless proper ventilation is provided.
2. 14. Do not place flower vases, pots, cups, cosmetics, liquids such as water, etc on or around the TV.
2. 15. Choose a place where light (artificial or sunlight) does not shine directly on the screen.
2. 16. If the TV does not work properly and you are unable to restore normal operation by following the "troubleshooting"
section in your instruction manual, do not attempt any further adjustment. Unplug the TV and consult your authorized
dealer.
2. 17. Do not touch the controls other than those described in the operating instructions as improper adjustment of
other controls may result in damaging. Please ask your service authorized dealer to restore the TV to normal operation.
2. 18. For added protection for this TV during a lightning storm, unplug it from the wall outlet and disconnect the
antenna or cable system.
2. 19. If a strange sound or smell gives off from the TV, please turn off and unplug it from the wall outlet, then refer to
authorized dealer.
2. 20. To prevent fire, never place any type of candle or naked flames on the top or near the TV.
2. 21. Avoid any kind of impact to the TV. Be special careful not to damage the screen face.
2. 22. If the TV is to remain unused for a period of time. Turn off and unplug it from the wall outlet.
3P68S 3. EN7 MechanicalInstructions
4. Service Modes 3P68S 4. EN8

4. 3P68S Service Modes
4.1. Enter and exit service mode
a. Enter "factory service mode"Press "MENU","Q.VIEW" and "PP" in turn.
b. Enter "design service mode" : After entering "factory service mode",select"SC"item,then press "8","9"keys.
(Normally "design service mode"is not needed for production line.)
c. Exit service mode: Press"DISPLAY"key to exit service mode.
Adjustment:
In service mode,pressing digital keys directly can enter the corresponding page,pressing "MENU"key can enter
the next page,pressing "SCAN"key can enter prevenient page.
Pressing "UP"and"DOWN"keys can select the items to adjust, pressing"LEFT" and"RIGHT"keys can adjust the
values.
4.2. BUS OPEN mode
In service mode, pressing"MUTE"key can enter "BUS OPEN"mode, which is useful for white balance adjustment
using AUTO WHITE BALANCE EQUIPMENT or mass data written into EEPROM. IC. Pressing"MUTE"key again
can exit "BUS OPEN" mode.

4.3. VG2 adjust mode
Two methods to adjust VG2 voltage:
(1) OSD mode:
This mode is for sets with AKB function(page10 "VG2-MODE"is set to 1 and hardwire is with CCC loop ), adjust
the VG2 potmeter on the FBT till "OK" is displayed.
(2) Horizontal line mode:
This mode is for sets without AKB function(page 10"VG2-MODE" is set to 0 and hardwire is without CCC loop),
adjust the VG2 potmeter on the FBT untill the faint horizontal line appears in dark room(usually only one colour:
Red ,green or blue.
*Note:
*Note:VG2 voltage is also controled by"VG2-BRI"on page (5).

4.4. FACTORY mode
In service mode, pressing"PP"key can erter "FACTORY MODE", which is useful for aging in production lines.
Pressing "PP"key again can exit "FACTORY MODE".
4.5. RF AGC adjustment
a. Receive 571.25MHz , 60dB color bar signal.
b. Enter factory mode and press digital key "03".
c. Measure tuner AGC point voltage, and adjust AGC item till the voltage is 2.7V 0.1V (or till picture noise just
disappears)Usually the AGC value is fixed to 20.
4.6. FOCUS adjudtment
a. Receive cross-hatch pattern signal.
b. Set picture to"RICH" mode.
c. Adjust FBT's FOCUS knob till picture is clear.

4.7. SCREEN VOLTAGE adjustment
a. The TV set will be set up in the "AV" "STANDARD" mode, no signal input.
b. Enter into adjust factory mode, and press "03" keys to choose "Vg2" item, it will be permitted to enter light
Line mode.
c. In light-Line mode, Rotating screens potential for grid-line level so you can adjust. Press "CH+."or "CH-." Key ,
the by-line can be returned to the state in full screen mode, and then exit it.
4.8. Aging of machine mode
a. When enter into factory mode state, pressing P.P. key will be permitted to enter Aging of machine mode.
b.Press "8"key and "9"key one by one button exit aging mode .
4.9. BTSC alignment method(3P66SN)
a. FLUKE 54200 trasmitting colour barSignal frequency at 61.25MHZSignal strength at 80dBTest 3 under
BTSC settingssound frequency at 300HZInput signal to 3P66SN Latam RF, turn on TV.
3P68S 4. EN9 Service Modes 4.

b. After TV operate normally, use 3P66SN Latam RC to perform Auto-search or select CH03.
c. Enter factory mode (exact details refer to 3P66SN alignement instruction), use Multimeter FLUKE 87 to
measure at J852 to achieve a reading of 0.25 0 .02 Vrms.
d. Enter factory mode page 7 , in the selection of BTSC-L1, use multimeter FLUKE 87 to measure R860(CHL)
and R862(CHR) ( effective L, R audio output from TDA9580 BTSC demodulation), Adjust BTSC-L1 to achieve
CHR, CHL at 0.5 0.02 Vrms.
e. FLUKE 54200 transmitting colour barSignal frequency at 61.25MHZSignal strength at 80dB, Item Test1
under BTSC, BTSC-MOD to set Stereo.
f. Use Dual Trace Oscilloscope, CH1 measures R860 (CHL), CH2 measures R862(CHR).Enter Factory mode
page 7, Select Stereo in BTSC-MODE, adjust BTSC-A1 and BTSC-A2, to achieve the clearest, cleanest, least
interdependent waveforms of 300Hz and 3kHz. Also adjust BTSC-TC, to achieve the best waveform of 300Hz
and 3kHz. (Suggest default value of 4)
g. "Reduce the signal strength of FLUKE 54200 to 30dB, transmitting colour bar, Signal frequency at 61.25MHZ
BTSC-Stereo, SAP-MOD, audio frequency at L=300Hz, R=3kHZ. Adjust values of BTSC-ST and BTSC-SP while
pressing "SAP" key on the RC, until no detection of Stereo and SAP, then Adjust values of BTSC-ST and
BTSC-SP while pressing "SAP" key on the RC, until proper detection of Stereo and SAP. Final confirmation of
values for BTSC-ST and BTSC-SP."
4.10. Factories parameters of the adjustment
Debugging items and directive from the page " 0" to page" 15" consists of 16 items, and a "predetermined
adjustment page"Belows are testing the items specified
(0) Page 0

Service setting OSD display Description Value Default

Horizontal shift HSH 50Hz Horizontal center 0...63 35

Horizontal shift HSH-60 60Hz Horizontal center 0...63 30

EW Width EWW 50Hz EW Width 0...63 50

EW Width EWW-60 60Hz EW Width 0...63 50

Vertical Slope VSL 50Hz Vertical Slope 0...63 30

Vertical Slope VSL-60 60Hz Vertical Slope 0...63 30

Vertical Shift VSH 50Hz Vertical Shift 0...63 35

Vertical Shift VSH-60 60Hz Vertical Shift 0...63 35

Vertical Amplitude VAM 50Hz Vertical Amplitude 0...63 25

Vertical Amplitude VAM-60 60Hz Vertical Amplitude 0...63 25

S-correction SC 50Hz S-correction 0...63 20

S-correction SC-60 60Hz S-correction 0...63 20
3P68S 4. EN 10

(1) Page 1

Service setting OSD display Description Value Default

EW parabola/width PW 50Hz EW parabola/width 0...63 40

EW parabola/width PW-60 60Hz EW parabola/width 0...63 40

EW trapezium TC 50Hz EW trapezium 0...63 25

EW trapezium TC-60 60Hz EW trapezium 0...63 25

Upper corner parabola UCP 50Hz Upper corner parabola 0...63 40

Upper corner parabola UCP-60 60Hz Upper corner parabola 0...63 40

Lower corner parabola LCP 50Hz Lower corner parabola 0...63 42

Lower corner parabola LCP-60 60Hz Lower corner parabola 0...63 42

Horizontal parallelogram HPAR 50Hz Horizontal parallelogram 0...63 28

Horizontal parallelogram HPAR-60 60Hz Horizontal parallelogram 0...63 28
Horizontal bow HBOW 50Hz Horizontal bow 0...63 35

Horizontal bow HBOW-60 60Hz Horizontal bow 0...63 35

(2) Page 2

Service setting OSD display Description Value Default

Black level offset C BLC Common course black level offset 0...63 7

Black level offset R BLR Fine black level offset R 0...63 33

Black level offset G BLG Fine black level offset G 0...63 35

Black level offset B BLB Fine black level offset B 0...63 36

White point R WPR White point R 0...63 42

White point G WPG White point G 0...63 31

White point B WPB White point B 0...63 48
3P66S 4. EN 11 Service Modes

(3) Page 3

Service setting OSD display Description Value Default

AGC Take over AGC AGC Take-over 0...63 20

VG2 VG2 Adjustment Vg2 voltage 0...63 25

(4) Page 4

Service setting OSD display Description Value Default

Speech treble S-TR Speech treble 0...63 24

Speech bass S-BA Speech bass 0...63 42

Music treble M-TR Music treble 0...63 42

Musia bass M-BA Music bass 0...63 48

Theatre treble T-TR Theatre treble 0...63 32

Theatre bass T-BA Theatre bass 0...63 48

AV curve offset AV-OF AV curve offset compare TV -31...+32 -3

Volume curve V-05 0-5 Volume curve 0...81 40

Volume curve V-10 5-10 Volume curve 0...81 55

Volume curve V-20 10-20Volume curve 0...81 63

Volume curve V-30 20-30Volume curve 0...81 67

Volume curve V-40 30-40Volume curve 0...81 69

Volume curve V-50 40-50Volume curve 0...81 70

Volume curve V-63 50-63Volume curve 0...81 80
Service Modes 3P68S 4. EN 12

(5) Page 5

Service setting OSD display Description Value Default

Soft brightness S-BRI Soft brightness 0...63 35

Soft color S-COL Soft color 0...63 25

Soft contrast S-CON Soft contrast 0...63 30

Soft sharpness S-SHA Soft sharpness 0...63 35

Nature brightness N-BRI Nature brightness 0...63 35

Nature color N-COL Nature color 0...63 25

Nature contrast N-CON Nature contrast 0...63 40

Nature sharpness N-SHA Nature sharpness 0...63 60

Rich brightness R-BRI Rich brightness 0...63 40

Rich color R-COL Rich color 0...63 30

Rich contrast R-CON Rich contrast 0...63 60

Rich sharpness R-SHA Rich sharpness 0...63 63

(6) Page 6

Service setting OSD Description Value Default

display

IFA IFB IFC IF PLL demodulator 0: 58.75MHz 1
frequency setting 1: 45.75MHz
2: 38.90MHz
3: 38.00MHz
4: 33.40MHz
5: 33.90MHz

AGC Speed A SPD AGC Speed 0..3 1

Noise reduce NR Noise reduce(effect 0: OFF 0
when reopen TV) 1: ON
3P68S 4. EN 13 Service Modes

BKS&BSD Register BKS BKS&BSD Register BKS(Black stretch switch): 1
setting
0:off 1:on
BSD(Black stretch depth):
0: 15 IRE 1: 30 IRE
BKS=1(default)
0: BSD=0
1: BSD=1

Blue screen BB Blue screen(effect 0: No blue screen 1
when reopen TV) 1: blue screen

Video mute V-M Video mute 0: No black screen when
switch off
1: black screen when
switch off

3P66 or 5P66 3 or 5 3P66 or 5P66 0: 3P66 0
selection selection(AV switch ) 1: 5P66

AV POC Setting A-POC AV POC Setting 0: POC=0 1
1: POC depend on IFI

TV POC Setting T-POC TV POC Setting 0: POC depend on LOCK
or SL 1
1: POC depend on LOCK
or IFI
2: POC depend on LOCK
or SL or IFI

Blue screen condition BLUE Blue screen 0: depend on program
condition 1: AV depend on IFI 1
TV depend on IFI or SL

Switch off condition OFF Switch off condition 0: depend on program 0
1: AV depend on IFI
TV depend on IFI and SL

VG2 MODE VG2-Mode VG2 MODE 0: light