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8T84
Service Manual
37 pgs2.46 Mb0

Erisson 8T84 Service Manual

SERVICE MANUAL
8T84 CHASSIS
Design and specifications are subject to change without prior notice. ( ONLY REFERRENCE)
ENGINEER BY: CHECKED BY: PPROVED BY:
_____
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Contents
---------------------------------------------
Circuit Diagram-----------------------------------------------------
2 3-8 9 10-11 12-26 27
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TECHNICAL SPECIFICATION
1.General Specification
Y Cb Cr/Y Pb Pr
5.
No
1. System 1) PAL BG/DK/I
2. Channel 1) VHF : K1～S7
3. Input Voltage
4. Market
5. Panel Size(inch) 15”/17’’/20’’
6. Tuning System FS
7. Operating Environment 1) Temp : 0 ~ 40 deg
8. Storage Environment 3) Temp : -20 ~ 50 deg
Item Specification Remark
2) SECAM BG/DK/L/L’
3) NTSC M *
CATV : S8～S38 UHF : S39～DS57
AC 110 ~ 240 V，50/60Hz
EUROPE, East ASIAN, Australian
2) Humidity : 40 ~ 85 %
4) Humidity : 30 ~ 90 %
2. Feature and Function
No
1. TELETEXT 10page
2. REMOCON RC5 Code
3. FULL SCART Input 1
4. Component input 1
VGA
6. 2 Carrier Stereo YES
7. NICAM Stereo Y
8. 2 Carrier Dual Y
9. NICAM Dual Y
10. SSC (Split Screen) Mode Option DUAL TXT PAGE
11. Headphone Y
12. 16:9 Mode Y
13. Noise Reduction Y
14. Progressive Scan(CTI) Option
15. Comb Filter Y
16. Tone control (Bass/ Treble/ Balance) Y
17. Customer LOGO Y
18. 5 Band Equalizer Y
Item Specification Remark
(480i/p, 720p, 1080i)
1
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TECHNICAL SPECIFICATION
9.
No
19. Clock(Remind timer / Wake timer) Y
20. Child Lock Y
21. 4 Picture/Sound Mode Y
22. OSD Language English/French/Deutsch Others can be added
23. TXT Language East/west/pan
24. ATS Y
Item Specification Remark
European/Cyrillic/Greek
3. Safety and Regulation
No
1. Force Stability – Incline Plane Tip Test deg
2. Force Stability – Level Tip Test N
3. Isolation Gap, AC-AC/ AC-DC 3 mm
4. Isolation Gap, insulation- no insulation 6 mm
5. Power Consumption, Max 40 75 W 15’’/20’’ IEC 65
6. Power Consumption, Stand by 1 3 W
7. Power Consumption, Current harmonics IEC 107-1
8. Dielectric Voltage 3 kV at 10 mA, for 1 minutes Isolation Resistance 4 MΩ
10. Leakage Current 0.7 mApp
11. Power Cord Captivity 15 kg
12. Flammability – Back Cover V0 UL94
13. Sharp Edge none
14. UL Compliance
15. FCC Compliance
16. CDRH Radiation Compliance
17. CSA Compliance
18. CEB Compliance
19. CE Compliance Y
20. CB Compliance Y
Item Min Typ Max Unit Remark
4. Video
No
1. Linearity Distortion, Vertical %
2. Linearity Distortion, Horizontal %
3. Trapezoidal Distortion, Vertical %
4. Trapezoidal Distortion, Horizontal %
5. Over Scan, Vertical %
6. Over Scan, Horizontal %
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Item Min Typ Max Unit
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Remark
TECHNICAL SPECIFICATION
No
7. Brightness, Maximum 100 cd/m
8. Video Noise Limited Sensitivity(@S/N=30db) VHF
9. Video Noise Limited Sensitivity(@S/N=30db) UHF
10. Selectivity –1.5M 35 dB
11. Selectivity +8M 40 dB
12. Tuning Range -0.75 1 MHz
13. Resolution Horizontal 300 Lines
14. Resolution Vertical 400 Lines
15.
Item Min Typ Max Unit
2
48 dBm
51 dBm
5. Chroma
No
1. Purity (mislanding) um
2. Convergence mm
3. White Balance, X axis 0.280 0.288 0.296
4. White Balance, Y axis 0.297 0.295 0.303
5. White Balance, Color Temperature
6. Color Sensitivity 45 dB
7. Color Burst Lock-in Range +/-3
8. Color Killer Sensitivity -80 dBm
Item Min Typ Max Unit
9000 kdeg 9000kdeg(288,295)
13000kdeg(268,273) 9300(281,311) 6500(313,329)
Hz
00
Remark
Remark
6. Audio
No
1. Audio Noise Limited Sensitivity, VHF-L 42 dBm
2. Audio Noise Limited Sensitivity, VHF-L 42 dBm
3. Audio Noise Limited Sensitivity, UHF 48 dBm
4. Buzz (S/N Ratio) 40 dB
5. Min. Volume Hum 20 mV
6. Distortion 10 %
7. Audio Output, L/R,at 7 % THD 4 W
8. Audio Output, Center X W
9. Audio Output, Woofer X W
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Item Min Typ Max Unit
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Remark
TECHNICAL SPECIFICATION
No
Item Min Typ Max Unit
10. Stereo Separation 25 dB
11. Speaker Impedance 8or4 ohm
12. Speaker Power Rating 4W W
7. Panel
No
1. Aspect ratio 4:3 16:9 4:3
2. Resolution 1024
3. Pixel Pitch 0.30
4. No. of Colors 16.2
5. Brightness 400 450 450
6. Contrast Ratio 350 400 350
7. Viewing angle X axis left 75 88 88
8. Viewing angle X axis right 75 88 88
9. Viewing angle Y axis up 50 88 88
10. Viewing angle Y axis down 75 88 88
Item 15.1’’ 17.1’’ 20.1’’ Unit
x768
x
0.30
1280 x768
0.291 x0.29 1
16.7M 16.7M
640 x480
0.6375 x0.637 5
@60Hz
mm
M
cd/m
2
degre e degre e degre e degre e
Center point
CR>5
CR>5
CR>5
CR>5
Remark
Remark
11. Life time 50000 50000 50000 hours
12. Response time(rise) 7 12 15 ms
13. Response time(decay) 18 13 15 ms
8. External Interface
No
1. Video Input Level 0.85 1 1.15 Vpp EN-50049
2. Video Input Frequency Response 4.5 MHz
3. Video Input S/N 40 dB
4. Audio Input Level 0.4 0.5 0.6 Vrms
5. Audio Input Frequency Response 0.1 7 kHz
6. Audio Input S/N 40 dB
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Item Min Typ Max Unit
Remark
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TECHNICAL SPECIFICATION
No
7. Audio Input Distortion 2 %
8. Audio Input Dynamic Range 2 V
9. Video Output Level 0.85 1 1.15 Vpp EN-50049
10. Video Output Frequency Response 3.8 MHz
11. Video Output S/N 40 dB
12. Audio Output Level 0.4 0.5 0.6 Vrms
13. Audio Output Frequency Response 0.1 7 kHz
14. Audio Output S/N 40 dB
15. Audio Output Distortion 2 %
16. Video Input Level, R/G/B Vpp
17. Video Input Level, Component(Y, PB, PR)
18. RGB Input Resolution, Vertical pixel
19. RGB Input Resolution, Horizontal pixel
20. RGB Input Horizontal Frequency kHz
21. RGB Input Frame Rate Hz
Item Min Typ Max Unit
0.6 0.7 0.8 Vpp 75 ohm
Remark
9. The others
No
1. Search Sensitivity -95 -90 -85 dBm
2. Heating Time 7 sec
3. Soft Ware Functionality Test SMI Specification
4. REMOCON Working Sensitivity, Straight 8 m
5. REMOCON Working Sensitivity, T/B/L/R 6 m 30 degree
6. Closed Caption Sensitivity dBm
7. Teletext Sensitivity -70 dBm
8. Resonance of unit (Sweep freq : 50 ~
1000)
9. Clock, real time gain or loss (sec per day) sec
10.
Item Min Typ Max Unit
None
Remark
10. Customer Menu Setup (as shipped condition
No
1. PSM Movies
2. SSM Music
3. Volume 30
4. Mute Off
5. Input Mode RF
6. Customer Menu Language English customer define
Item Min Typ Max Unit
Remark
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TECHNICAL SPECIFICATION
No
7. Avl On
8. Sleep Timer Off
9. Auto Sleep Off
10. Blue Back ON
11. Surround On
12. TXT Off
13.
Item Min Typ Max Unit
Remark
11. Reliability
No
1. ESD 4 kV IEC-1000-4-2
2. EFT/Burst
3. Surge Immunity 4 kV IEC-1000-4--5
4. Voltage Dip Test, 10ms 30 % IEC-1000-4-11
5. Voltage Dip Test, 100ms 100 % IEC-1000-4—11
6. Laser arcing Test times each Polarization
Item Min Typ Max Unit
2
kV IEC-1000-4-4
Remark
7. CST
8. Abnormal Test
9. Operation Temperature 0 25 45 deg
10. Operation Humidity 10 90 %
11. Storage Temperature -20 60 deg
12. MTBF (Confidence Level : 90 %) 10000 hours
13. Ship Test
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Chassis Block Diagram
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Service Adjustments
1. Preface
This Adjust Manual is only used for 8T84 LCD TV.
2. Specify
2.1 This TV operates onDC supply ,so through AC- DC ADAPTER to socket at
the back of the TV.The power is +12VDC.
2.2 Insert the mains plug in the wall socket having a mains voltage of 100~240V AC, 50/
60Hz.
2.3 Working condition: if no show clearly, work in the following state:.
1) Tempurature : 25 5
2) Relative humidity : 60% 20%
2.4 The receive set should be adjusted after working 20 minutes if no prior notice.
2.5 Equipments used
--- Multimeter
Max Input Current: Up to 1 A/Max input Voltage:500Vdc
Measurement Range: 10Mvr~100Vdc/Accuracy :0.03%
--- Oscilloscope:
Frequency band: up to 20M/input impedance: up to 1
Input Capacitance: Less than 30Pf/ Max Input Voltage:250V
--- PC
XGA(1024X768 60Hz)
2.6 Signal
60~80dBu standard color bar from Pm 5418 or from factory central signal generator is
used if no prior notice.
3. Software
Notice
software using in this chassis is stored in FLASH ROM. The flash ROM is re-writable.
Procedure relates to functions. Difference function chassis should be written differen
-ce edition procedure.
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Service Adjustments
4. Chassis check
4.1 The chassis should be clear and no short or open circuit, no missing components or
wrong components insertion.
4.2 Check the input and output pins of 12V,5V ,3.3V,1.8V , REGULATOR IC
(The C step of 8360,3430,8330,7096,7097),
4.3 Connect the chassis to LCD panel on the adjust equipment and power on, confirm
5V,3.3V, from the regulators are OK.
4.4. Confirm OSD is OK,blue ground appears is no signal.
4.5 Confirm remote control functions and all local keys control function are OK. The set
can enter standby states and exit to normal work status.
4.6 Confirm search function, store all factory signal, confirm picture and sound of any
pattern are Ok.
4.7 RF-AGC adjustment
Inputting the color signal of 70dB(VHF-H wave band),pressing the factory menu botton
to enter factory menu,adjusting RFAGC value to AGC voltage=2.7V which is in one pin
of tuner.
4.8 Confirm sound and picture of SCART is ok at input and output,the sound and
picture of YUV and PC are ok at input.
4.9 After complete assembly set TV to snow dot mode to aging line.
5. Complete check
5.1 Confirm H,V repeat rate and liner are OK in every state picture of TV,AV PC and so on.
5.2 Check white balance(adjustment)
5.3 Check picture and sound in all the TV mode the weak and strong signal; ch
5.4 Confirm NICAM function is OK.
5.5 Confirm Teletext function is OK.
5.6 Confirm sound and picture of SCART is ok at input and output,the sound and
ck picturein low and high voltage power input mode.
e
CONFIRM
are OK. Check picture and sound under
NO SHORT CIRC
-UIT TO Gnd.
picture of YUV and PC are ok at input.
5.7 Confirm remote control and local control functions are OK,we can set the TV to standby
mode then normal mode to confirm if the set can work properly.
6. Final setting
6.1 PICTURE :MOVIES
6.2 VOLUME :30
6.3 BALANCE :0
6.4 CCD : OFF
6.5 SLEEP TIME :0
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Control Location
Insert The Batteries
1
Remove the battery cover by pressing it and sliding it down.
2
Insert the two 1.5V (AAA size) batteries making sure the polarity (+ or -) of the batteries matches the polarity marks inside the unit.
3
Replace the battery cover by sliding it in until you hear a click sound.
SETUP
Precautions when using batteries
Do not use old and new batteries together. Do not use different types of batteries (for example, Manganese and Alkaline batteries)together. Note that there are chargeable and non-chargeable batteries. Do not attempt to charge non-chargeable batteries. Remove the batteries from the remote control unit if you do not intend to use the unit for a long time.
Precautions when using the remote control unit
Do not drop the remote control unit. Do not subject the remote control unit to physical shocks. Keep the remote control unit dry. Wetting it may cause the unit to malfunction. Replace the batteries with new ones when operation of the unit deteriorates.
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