Text preview for : EB770F.pdf part of LG EB770F Service manual for CRT monitor FLATRON EB770F
Back to : EB770F.rar | Home
SPECIFICATIONS
1. PICTURE TUBE Size DefIection Angle Neck Diameter Dot Pitch Face Treatment Low Radiation 3-2. Power Consumption : 17 inch (FCDT) : 90° : 29.1 mm : 0.25 mm : W-ARASC (Anti-Reflection and Anti-Static Coating),Anti-Glare : TCO99, MPR-II
MODE NORMAL (ON) STAND-BY SUSPEND OFF H/V SYNC ON/ON OFF/ON ON/OFF OFF/OFF POWER CONSUMPTION LED COLOR GREEN
less than 105 W less than 15 W
ORANGE
less than 15 W less than 5 W
ORANGE
2. SIGNAL 2-1. Horizontal & Vertical Sync 1) Input Voltage Level : Low=0~1.2V, High=2.5~5.5V 2) Sync Polarity : Positive or Negative 2-2. Video Input Signal 1) Voltage Level a) Color 0, 0 b) Color 7, 0 c) Color 15, 0 2) Input Impedance 3) Video Color 4) Signal Format
: 0 ~ 0.7 Vp-p : 0 Vp-p : 0.467 Vp-p : 0.7 Vp-p : 75 : R, G, B Analog : Refer to the Timing Chart
4. DISPLAY AREA 4-1. Active Video Area : · Max Image Size - 325.1 x 243.8 mm (12.80" x 9.60") · Preset Image Size - 310 x 230 mm (12.20" x 9.06") 4-2. Display Color : Full Colors 4-3. Display Resolution : 1024 x 768 / 85Hz (Non-Interlace) 4-4. Video Bandwidth : 110 MHz 5. ENVIRONMENT 5-1. Operating Temperature: 15°C ~ 30°C (59°F ~ 86°F) (Ambient) 5-2. Relative Humidity : 8%~ 80% (Non-condensing) 5-3. Altitude : 5,000 m 6. DIMENSIONS (with TILT/SWIVEL) Width : 400.0 mm (15.74 inch) Depth : 424.0 mm (16.70 inch) Height : 395.0 mm (15.55 inch) 7. WEIGHT (with TILT/SWIVEL) Net Weight : 16.0 kg (35.28 lbs.) Gross Weight : 18.9 kg (41.67 lbs.)
2-3. Signal Connector 15-pin Connector (Attached) 2-4. Scanning Frequency Horizontal Vertical
: 30 ~ 70 kHz : 50 ~ 160 Hz
3. POWER SUPPLY 3-1. Power Range AC 100~240V (Free Voltage), 50/60Hz, 2.0A Max.
-2-
TIMING CHART
VIDEO
B A
C
E D F
SYNC
<< Dot Clock (MHz), Horizontal Frequency (kHz), Vertical Frequency (Hz), Horizontal etc... (µs), Vertical etc... (ms) >> Mode
H/V Sort Sync Polarity Frequency Total Period (E) Video Active Time (A) Blanking Time Sync Duration (D) (B) Back Porch (F) Front Porch (C)
Resolution 640x480 75Hz 800x600 75Hz 800x600 85Hz 1024x768 85Hz
1 2 3 4
H V H V H V H V
+ + + + + +
37.50 74.99 46.88 75.01 53.68 85.07 68.677 85.00
26.67 13.335 21.33 13.331 18.63 11.755 14.561 11.764
20.32 12.802 16.16 12.798 14.22 11.178 10.836 11.182
6.35 0.533 5.17 0.533 4.41 0.577 3.725 0.582
2.03 0.080 1.62 0.064 1.14 0.056 1.016 0.044
3.81 0.427 3.23 0.448 2.70 0.503 2.201 0.524
0.51 0.026 0.32 0.021 0.57 0.018 0.508 0.014
* Mode 1~Mode 4: Basic Mode
CONTROL LOCATIONS
1
2
3 6 5 4
7
CONTROL MAIN
NO. 1 2 3 4
Ref. No. SW207 SW204 SW205 SW203
Control Function POWER BUTTON OSD SELECT OSD ADJUSTMENT(UP) OSD ADJUSTMENT(DOWN)
NO. 5 6 7 8
FBT
8
Ref. No. SW206 SW202 SW201 VR901
Control Function OSD ADJUSTMENT(LEFT) OSD ADJUSTMENT(RIGHT) MENU BUTTON B+ ADJUSTMENT
-6-
ADJUSTMENT
GENERAL INFORMATION
All adjustment are thoroughly checked and corrected when the monitor leaves the factory, but sometimes several adjustments may be required. Adjustment should be following procedure and after warming up for a minimum of 30 minutes. · Alignment appliances and tools. - IBM compatible PC. - Programmable Signal Generator. (eg. VG-819 made by Astrodesign Co.) - EPROM or EEPROM with saved each mode data. - Alignment Adaptor and Software. - Digital Voltmeter. - White Balance Meter. - Luminance Meter. - High-voltage Meter.
AUTOMATIC AND MANUAL DEGAUSSING The degaussing coil is mounted around the CDT so that automatic degaussing when turn on the monitor. But a monitor is moved or faced in a different direction, become poor color purity cause of CDT magnetized, then press DEGAUSS on the OSD menu.
7) Adjust tilt as arrow keys to be the best condition. 8) DIST. ADJ. BALANCE command. 9) Adjust parallelogram as arrow keys to be the best condition. 10) Adjust balance of pin-balance as arrow keys to be the best condition. 11) DIST. ADJ. FOS. ADJ command. 12) Adjust V-SIZE as arrow keys to 230±2mm. 13) Adjust V-POSITION as arrow keys to center of the screen. 14) Adjust H-SIZE as arrow keys to 310±2mm. 15) Adjust H-POSITION as arrow keys to center of the screen. 16) Adjust S-PCC (Side-Pincushion) as arrow keys to be the best condition. 17) Adjust TRAPEZOID as arrow keys to be the best condition. 18) Save of the Mode 1. 19) Display from Mode 2 to 4 and repeat above from number 12) to 19) 20) PRESET EXIT Y (Yes) command. 4. Adjustment for White Balance and Luminance. 1) Set the White Balance Meter. 2) Press the DEGAUSS on the OSD menu for demagnetization of the CDT. 3) COLOR ADJ. LUMINANCE command of the alignment program. 4) Set Brightness and Contrast to Max position. 5) Display color 0,0 pattern at Mode 4. 6) COLOR ADJ. BIAS ADJ. COLOR No. 1 command of the alignment program. 7) Check whether green color or not at R-BIAS and BBIAS to min position and G-BIAS to 150(96) and Sub-Brightness to 90(5A) position. Adjust G2 (screen) command to 0.4 ± 0.05FL of the raster luminance. 8) Adjust R-BIAS and B-BIAS command to x=0.283± 0.005 and y=0.298 ±0.005 on the White Balance Meter with PC arrow keys. 9) Adjust SUB-Brightness command to 0.4±0.1FL of the raster luminance. 10) Adjust repeat number 8). 11) After push the "ENTER" key, and "COMMAND PRESET EXIT Y(Yes)" command. 12) Display color 15,0 Window pattern (70x70mm) at Mode 4. 13) DRIVE ADJ. No 1. command.
ADJUSTMENT PROCEDURE & METHOD
- Install the cable for adjustment such as Figure 1and run the alignment program on the DOS for IBM compatible PC. - Set external Brightness and Contrast volume to max position. 1. Adjustment for B+ Voltage. 1) Display cross hatch pattern at Mode 4. 2) Adjust C961 (+) voltage to 50± 0.5Vdc with VR901. 2. Adjustment for High-Voltage. 1) Display cross hatch pattern at Mode 4. 2) DIST.ADJCTRL PWM High Voltage Command. 3) Adjust High Voltage to 25.5kV±0.1 kVdc. 4) Press Enter Key. 3. Adjustment for Factory Mode (Preset Mode). 1) Display cross hatch pattern at Mode 1. 2) Run alignment program for EB770F on the IBM compatible PC. 3) EEPROM ALL CLEAR Y(Yes) command. Do not run this procedure unless the EEPROM is changed. All data in EEPROM (mode data and color data) will be erased. 4) Power button of the monitor turn off turn on. 5) COMMANDPRESET STARTY(Yes) command. 6) DIST. ADJ. CTRL PWM TILT command.
- 14 -
14) Set Brightness and Contrast to Max position. 15) Set SUB-CONTRAST 100(64) (decimal) position. 16) Set G-DRIVE to 90(5A) at DRIVE of the alignment program. 17) Adjust R-DRIVE and B-DRIVE command to white balance x=0.283±0.003 and y=0.298±0.003 on the White Balance Meter with PC arrow keys. 18) Adjust SUB-CONTRAST command to 50±2FL of the color 15,0 box pattern (70x70mm) luminance at mode 4 and save in color 1. 19) After push the "ENTER" key, and "COMMAND PRESET EXIT Y(Yes)" command. 20) Display color 15,0 full white patten at Mode 4. 21) Set Brightness and Contrast to Max position. 22) COLOR ADJ. LUMINANCE ABL command.
23) Adjust ABL to 32±1FL of the luminance. 24) Exit from the program. 5. Input EDID Data. 1) Display color 15,0 cross hatch pattern at Mode 4. 2) EEPROM Write EDID command and confirm "EDID Write OK!!" message of monitor. 3) Exit from the alignment program. 4) Power switch OFF/ON for EDID data save. 6. Adjustment for Focus. 1) Set the Brightness and Contrast to max position. 2) Display H character in full screen at Mode 4. 3) Adjust two Focus control on the FBT that focus should be the best condition.
Monitor to be adjusted
Video Signal Generator
d
IBM Compatible PC
Parallel Port
RS 23 2C
Control Line
PA
RA
C
LL
EL
No
tu
se
Power inlet (required)
220
A
R
V-S
TO
YN
MO
NI
CS T
PO
S
WE
VG
Power Select Switch (110V/220V) Power LED
R
B
E ST Switch
F V-Sync On/Off Switch (Switch must be ON.)
A
9 15 10 5 11 6 1 5 6 1
C
13 25 1 14
5V
OFF
ON
F
5V ON 4.7K 4.7K 4.7K 74LS06 74LS06
5V
E
OFF
B
Figure 1. Cable Connection
- 15 -
TROUBLESHOOTING GUIDE
1. NO POWER
NO POWER (POWER INDICATOR OFF)
CHECK FUSE OK? (F901) YES
NO
TROUBLE IN FUSE (F901)
CHECK C908 VOLTAGE? (AC120V: 160VDC, AC220V: 304VDC)
NO
TROUBLE IN D900
YES
CHECK IC901 PIN 6 WAVEFORM (SQUARE WAVE COMES OUT?)
NO
TROUBLE IN IC901
YES
CHECK D941, D942, D951, D961, D962, D971 VOLTAGE?
NO
TROUBLE IN D941, D942, D951, D961, D962, D971
YES
TROUBLE IN Q903, Q972, Q971, Q952, Q951, Q942, Q941
- 16 -
2. NO CHARACTER
NO CHARACTER
CHECK IC302 PIN 9 (5V) ? YES
NO
TROUBLE IN P302 5V LINE
CHECK IC302 PIN 5, 6, 7 ?
NO
TROUBLE IN PC SIGNAL, P301 SIGNAL CABLE
YES
CHECK IC302 PIN 18, 19, 20 ?
NO
TROUBLE IN IC302
YES CHECK IC303 PIN 4 (80V) PIN 8 (12V) ?
NO
TROUBLE IN P303 12V LINE/ 80V LINE
YES
CHECK IC303 PIN 1, 2, 3 ?
NO
TROUBLE IN IC303
YES CHECK R, G, B CATHODE VOLTAGE? YES TROUBLE IN CRT SOCKET TROUBLE IN R331~R333, L311~L313 D307~D312
NO
- 17 -
3. NO RASTER
NO VIDEO (POWER INDICATOR ON)
CHECK POWER INDICATOR GREEN or ORANGE?
ORANGE
DPM MODE (NO H and/or V SYNC)
GREEN
CHECK D712 ANODE (-157V)?
NO
TROUBLE IN D712
YES
CHECK G1 VOLTAGE? (-55 ~ -15V)
NO
TROUBLE IN Q704
YES
CHECK CDT HEAT VOLTAGE? (6.3V)
NO
TROUBLE IN D941, Q942, Q941
YES
TROUBLE IN CDT
- 18 -
4. NO HORIZONTAL DEFLECTION
NO H-DEFLECTION (ONE VERTICAL LINE)
CHECK Q706?
NO
TROUBLE IN Q706
YES
CHECK B+ VOLTAGE (50V)?
NO
TROUBLE IN 50V LINE
YES
CHECK T701(FBT) PIN 2 (31KHZ, 60V 69KHZ, 140V ?
NO
TROUBLE IN Q719, Q720, D710
YES
CHECK Q705 COLLECTOR WAVEFORM?
NO
TROUBLE IN Q705
0V T
YES
TROUBLE IN T701, P701
- 19 -
5. TROUBLE IN H-LINEARITY
UNBALANCED OF H-LIN.
CHECK IC401 PIN 22, 23, 24 ?
NO
TROUBLE IN IC401 (MICOM)
YES
CHECK Q711~Q716?
NO
TROUBLE IN Q711 ~ Q716
YES
CHECK L703?
NO
TROUBLE IN L703
YES
Cs SIGNAL TABLE
HORIZONTAL FREQUENCY(fH)
Cs1 L H H H L H
Cs2 L H L L H H
Cs3 L L H H H H
TROUBLE IN C722, C723, C726, C729
29K 34K 39K 45K 49K 61K
~ ~ ~ ~ ~ ~
33.9K 38.9K 44.9K 48.9K 60.9K 71.9K
- 20 -
6. NO VERTICAL DEFLECTION
NO V-DEFLECTION (ONE HORIZONTAL LINE)
CHECK IC601 PIN 3 (15V)?
NO
TROUBLE IN R603 15V LINE
YES
CHECK IC601 PIN 7 (40V)?
NO
TROUBLE IN HIGH-VOLTAGE OUT CIRCUIT(FBT), D721, R606
YES
CHECK IC701 PIN 12, 13?
NO
TROUBLE IN IC701
3V
YES
TROUBLE IN IC601, V-CIRCUIT
- 21 -
7. TROUBLE IN OSD
NO OSD
(ENTER BUTTON MUST BE PRESSED.)
CHECK IC301 B+ ?
NO
TROUBLE IN 5V LINE
DC 5V
YES
CHECK IC301 PIN 5, 10 WAVEFORM?
Pin 10
5V
NO
TROUBLE IN IC601 PIN8 (V-FBP), T701 40V LINE (H-FBP)
Pin 5
YES
CHECK IC301 PIN 12 WAVEFORM ?
H+V 5V
NO
TROUBLE IN IC302, IC301
YES
CHECK IC301 PIN 13, 14, 15 ?
H+V 5V
NO
TROUBLE IN IC301, IC302
YES
TROUBLE IN OSD PERIPHERAL CIRCUIT
- 22 -
8. TROUBLE IN DPM
OFF MODE FAILURE
(NO OFF MODE.)
CHECK IC401 (MICOM) PIN 1, 42 (H/V INPUT) SIGNAL?
NO
INPUT H/V SYNC SIGNAL
CHECK PC, (PC IS NOT GOING INTO DPM OFF MODE)
YES
H/V SYNC
CHECK IC401 PIN 6 WAVEFORM?
NO
TROUBLE IN X401
5V
YES
24MHz
CHECK IC401 (MICOM) PIN 3, 4 ? SEE DPM TABLE YES
NO
(DPMF: 0V)
TROUBLE IN IC401 (MICOM)
CHECK B+ LINE (6.3V,15V, 80V) ?
NO
TROUBLE IN Q941, Q942, Q951, Q952, Q971, Q972
YES Mode TROUBLE IN PC Item DPMF H H H L
DPM TABLE DPMS H L L L LED GREEN AMBER AMBER AMBER
NORMAL STAND-BY SUSPEND OFF
- 23 -
9. NO DEGAUSSING
NO DEGAUSSING
(DEGAUSS ON THE OSD MENU MUST BE PRESSED.)
CHECK IC401 PIN 31 (0V)?
NO
TROUBLE IN IC401 (MICOM)
YES
CHECK Q953 COLLECTOR VOLTAGE? DC 15V YES
NO
TROUBLE IN Q953
CHECK P902 ?
NO
TROUBLE IN P902
YES
CHECK RL901?
NO
TROUBLE IN RL901
YES TROUBLE IN TH901, DEGAUSSING COIL
- 24 -
10. NO TILT (NO ROTATION )
NO TILT (NO ROTATION)
CHECK Q504(COLLECTOR) WAVE FORM ?
NO
TROUBLE IN IC401 (MICOM)
12V
YES
CHECK 15V LINE AND 6.3V LINE ?
NO
TROUBLE IN 15V LINE, 6.3V LINE
YES
CHECK Q503 EMITTER VOLTAGE ?
NO
TROUBLE IN Q501~Q503
YES
TROUBLE IN P501, TILT COIL, D501
- 25 -
< OSD Control >
80V Heater ( 6.3V ) H-Sync Sig V-Sync Sig I2C DATA(SDA) I2C CLOCK(SCL) 5V 15V R G B VIDEO PRE-AMP (IC302) LM1269 VIDEO MAIN AMP (IC303) LM2467 DY Signal Cable H.V
SELECT
OSD ON/OFF
POWER
CDT
G1 Screen(G2)
5V I2C
R/G/B Drive/Contrast Cut-Off
MICOM (IC401) SCL / SDA H/V Sync, PWM Control CUT OFF IC (IC304) LM2480 15V 5V I2C
OSD IC (IC301) LSC4568P2
Dynamic Focus Static Focus
15V E2PROM (IC402) 15V I2C H/V Sync 80V 50V SMPS TRANS (T901) 15V 6.3V H-DRV Vout 2 H/V Sync Processor ( IC701 ) TDA4841 Vout 1 V-OUT ( IC601) TDA4866 I2C
BRIGHTNESS CONTRAST H / V POSITION H / V SIZE TOP/BOTTOM CORRECTION SPCC TRAPEZOID PIN BALANCE PARALLELOGRAM ROTATION RECALL DEGAUSS DDC OPTION COLOR CURVE MOIRE LANGUAGE RECALL VIDEO LEVEL OSD POSITION
X-RAY Protection Circuit 15V
Vertical Blanking, Brightness Control - 157V 40V
TILT COIL
BLOCK DIAGRAM
DEGAUSSING COIL
- 11 15V 5V B-DRV SMPS CONTROL (IC901) DPM CONTROL CIRCUIT
5V Voltage Regulating Circuit
6.3V
TILT Control Circuit
Degaussing Circuit
FBT ( T701 ) H-OUT ( Q706) B+ H-Linearity Correction 300V Dynamic Focus Circuit DC/DC Converter 50V D/D Feed Back Auto Beam Limit 600V Screen Control Circuit
15V
Line Filter
POWER INPUT 100~240VAC (50/60Hz)
DESCRIPTION OF BLOCK DIAGRAM
1. Line Filter & Associated Circuit. This is used for suppressing noise of power input line flowing into the monitor and/or some noise generated in this monitor flowing out through the power input line. That is to say, this circuit prevents interference between the monitor and other electric appliances. 2. Degauss Circuit & Coil. The degauss circuit consists of the degaussing coil, the PTC(Positive Temperature Coefficient) thermistor(TH901), and the relay(RL901). This circuit eliminates abnormal color of the screen automatically by degaussing the shadow mask in the CRT during turning on the power switch. When you need to degauss in using the monitor, select DEGAUSS on the OSD menu. 3. SMPS(Switching Mode Power Supply). This circuit is working of 90~264V AC(50/60Hz). The operation procedure is as follows: 1) AC input voltage is rectified and smoothed by the bridge diodes (D900) and the capacitor (C908). 2) The rectified voltage(DC) is applied to the primary coil of the transformer(T901). 3) The control IC(IC901) generates switching pulse to turn on and off the primary coil of the transformer (T901) repeatedly. 4) Depending on turn ratio of the transformer, the secondary voltages appear at the secondary coils of the transformer(T901). 5) These secondary voltages are rectified by each diode(D941, D942, D951, D961, D962, D971) and operate other circuit. (horizontal and vertical deflection, video amplifier, ...etc.) 4. X-ray Protection. If the high voltage of the FBT reaches up to 29kV (abnormal state), Q807 operates and IC401(MICOM) pin 41 come to low level. Then MICOM control IC701 (Deflection controller) to stop Horizontal drive pulse and stop Horizontal Deflection. 5. Micom(Microprocessor) Circuit. The operating procedure of Micom(Microprocessor) and its associated circuit is as follows: 1) H and V sync signal is supplied from the signal cable. 2) The Micom(IC401) distinguishes polarity and frequency of H and V sync. 3) The Micom sets operating mode and offers the controlled data. (H-size, H-position, V-size, ... etc.) 4) The controlled data of each mode is stored in itself. 5) User can adjust screen condition by each OSD function. The data of the adjusted condition is stored in EEPROM(IC402). 6. Horizontal and Vertical Oscillation. This circuit generates the horizontal pulse and the vertical pulse by taking the H and V sync signal. This circuit consists of the TDA4866(IC701) and the associated circuit. 7. D/D(DC to DC) Converter. This circuit supplies DC voltage to the horizontal deflection output circuit by increasing DC 50V which is the secondary voltage of the SMPS in accordance with the input horizontal sync signal. 8. Side-Pincushion & Trapezoid Correction Cirucit. This circuit improves the side-pincushion and the trapezoid distortion of the screen by mixing parabola and saw-tooth wave to output of the horizontal deflection D/D converter which is used for the supply voltage(B+) of the deflection circuit. 9. Horizontal Deflection Output Circuit. This circuit makes the horizontal deflection by supplying the saw-tooth current to the horizontal deflection yoke. 10. High Voltage Output & FBT(Flyback Transformer). The high voltage output circuit is used for generating pulse to the primary coil of the FBT(Flyback Transformer (T701)). A boosted voltage(about 25.5kV) appears at the secondary of the FBT and it is supplied to the anode, focus, and screen voltage of the CRT. 11. H-Linearity Correction Circuit. This circuit corrects the horizontal linearity for each horizontal sync frequency. 12. Vertical Output Circuit. This circuit takes the vertical ramp wave from the TDA4841(IC701) and performs the vertical deflection by supplying the saw-tooth current to the vertical deflection yoke. 13. Dynamic Focus Output Circuit. This circuit takes the horizontal and the vertical parabola waves from the TDA4841(IC701) and amplifies it to maintain constant focus on center and corners in the screen.
- 12 -
14. H & V Blanking and Brightness Control. Blanking circuit eliminates retrace line by supplying negative pulse to the G1 of the CRT. And Brightness circuit is used for control of the screen brightness by changing DC level of the G1. 15. Image Rotation (Tilt) Circuit. This circuit corrects the tilt of the screen by supplying the image rotation signal to the tilt coil which is attached near the deflection yoke of the CRT.
16. Video Pre-Amp Circuit. This circuit amplifies the analog video signal from 0-0.7V to 0-4V. It is operated by taking the clamp, R, G, B drive and contrast signal from the Micom(IC401). 17. Video Output Amp Circuit. This circuit amplifies the video signal which comes from the video pre-amp circuit and amplified it to applied the CRT cathode.
- 13 -
80V
0V 1H-Freq.
4.5V
0V 1H-Freq.
45V
10V
V-Freq.
8.7V
0V 1H-Freq.
1200V
0V
300V 730V 600V 200V 45V 0V
37V 0V 1H-Freq. V-Freq.
WIRING DIAGRAM
P201
P402 P405 P501
S S+
P701
P902 P702 AC Socket P402 T1
FBT
P703 Signal Cable P302 P301 G2
-7-
EXPLODED VIEW
EXPLODED VIEW PARTS LIST
Ref. No. 1 3091TKC067B 2423GC4E95A CABINET ASSEMBLY, EB770F BRAND C062 ABS, 85964, S/WE700S, LGESP (EB770F-NA) CDT SET, M41QEE903X 01NLGD - FOR NORTHERN HEMISPHERE (EB770F-EA) CDT SET, M41QEE903X 01RLAD - FOR NORTHERN HEMISPHERE (EB770F-NA) CDT SET, M41QEE903X 01RLGD - FOR EQUATORIAL BACK COVER ASSY, CB777F C035 PC-ABS 4TH (EB770F-EA) BACK COVER ASSY, CB777F C035 ABS (EB770F-NA) TILT SWIVEL ASSEMBLY, EB770F T057/B046 60HR,85964 (EB770F-EA) TILT SWIVEL ASSEMBLY, EB770F T057/B046 60HR,SP CKD (EB770F-NA) SCREW ASSY, PHP+5*25 (FZMW1)+GW18 COIL,DEGAUSSING, 75D-437 GET 0.4MM,120T,19 OHM,EB770F,WITH EARTH (EB770F-EA) COIL,DEGAUSSING, 1090MM 14.3 OHM 0.45MM 120T 17 (EB770F-NA) FBT (FLY BACK TRANSFORMER), FMMTC91 AM1048A (LIM SANG IL) Part No. 3091TKC067A Description CABINET ASSEMBLY, EB770F(LG CDT) BRAND C062 PC+ABS,85964,LG (EB770F-EA)
5
2
2423GC4E98A 2423GC4E96A 3809TKC035A
3 3809TKC035B 3043TKK081A 4
B
7
3043TKK081C
3
5 6
339-002J 6140TC3004B 6140TC3001B
6 8
6174Z-1048A 7
or 6174T13006A FBT (FLY BACK TRANSFORMER), CF1833LG2700 LIEN CHANGE 17"/70KHZ FST 8 9 6620TBD003A 6871TST240A SOCKET (CIRC), CPT PCS701E PARK ELEC. 10PIN 14/360 STRAIGHT PWB(PCB) ASSEMBLY,SUB EB770F XHGM BRAND CA-90 TOTAL (EB770F-EA) PWB(PCB) ASSEMBLY,SUB EB770F CONTROL TOTAL BRAND CA-90 (EB770F-NA) METAL SHIELD BOTTOM HOLDER, PCB FIX SIDE , NYLON66 BRACKET, EB770F SUPPORTER CDT MAIN TOTAL ASSEMBLY, EB770F BRAND CA-90 (EB770F-EA) MAIN TOTAL ASSEMBLY, EB770F BRAND CA-90 (EB770F-NA) PWB(PCB) ASSEMBLY,VIDEO, EB770F XHGM BRAND CA-90 TOTAL (EB770F-EA) PWB(PCB) ASSEMBLY,VIDEO, EB770F VIDEO TOTAL BRAND CA-90 (EB770F-NA) PWB(PCB) ASSEMBLY,MAIN, EB770F XHGM BRAND CA-90 TOTAL (EB770F-EA) PWB(PCB) ASSEMBLY,MAIN, EB770F KQLBMS BRAND CA-90 TOTAL (EB770F-NA)
2
10 11 12
6871TST240B 4950TKS169A 4930TKK031B 4810TKK171B 3313T17238A
C A
9
A 3313T17238D 6871TVT239A B 6871TVT239B 6871TMT248A C 6871TMT248C
12 11
10
4
MEN U
12
SE LE CT
1
11
DISASSEMBLY
1. TILT/SWIVEL & BACK COVER REMOVAL 1) Set the monitor face downward. 2) Pull the latch (a), carefully remove the Tilt/Swivel by pulling it upward. 3) Pressing the latch (b), Back cover by pushing it upward. 4) Release the latch (c). 5) Slide the Back Cover away from the Front Cabinet of the monitor.
Bac
k Co
ver
(c)
Ca bin et
(a)
Tip Spec. A(Width) : 5.0~15.0mm B(Depth) : 0.6~0.9mm C(Height) : 12.0mm
C
Tip
A B
(b)
3 1 3 2 2
-8-
Figure.1
2. TOTAL CHASSIS ASSEMBLY REMOVAL (Figure.1) 1) Carefully separate the CDT Board Assembly from the CDT neck. 2) Discharge the remaining static electricity by shorting between the Anode Cap and the CDT ground. 3) Disconnect the Anode Cap from the CDT. 4) Disconnect P902 (Degaussing pin), P701 (DY pin), and P501, P405 from the Main PCB. 5) Remove the Total Chassis Assembly from the Main Frame. (Figure.2) 6) Set the monitor face downward. 7) Pressing the latch (a), Main Chassis by pushing it upward.
Anode Cap
P701
Degaussing pin (P902) to Tilt coil (P501)
P902
SE
LE
CT
P405 P501
P201 (Control PCB)
Figure.2
CDT
(a)
(a)
3. VIODEO PCB ASSEMBLY REMOVAL 1) Disconnect P301, P302 from the Video PCB. 2) Remove three connects (a). 3) Remove screws (b). 4) Remove the Video PCB Assembly.
(a)
P302 P301
(a) (a) (b)
-9-
4. CONTROL PCB ASSEMBLY REMOVAL 1) Remove one screw (a). 2) Remove the Control PCB.
MEN
U
SE
LE
CT
(a)
(c)
5. BOTTOM BRACKET REMOVAL 1) Remove two holer (a). 2) Remove three screw (c). 3) Remove the Bottom Bracket.
(c) (c)
(a)
(a)
- 10 -