LG T730BHKL - Manuals

LG T730BHKL – Manual in PDF format online.

Manuals:

Manual

Manual LG T730BHKL

Summary

Page 3 - SAFETY PRECAUTIONS; on the schematic diagram and the replacement; CAUTION: N o m o d i f i c a t i o n o f a n y c i r c u i t s h o u l d b e; Leakage Current Hot Check Circuit

SAFETY PRECAUTIONS - 3 - SAFETY-RELATED COMPONENT WARNING!There are special components used in this color monitorwhich are important for safety. These parts are marked on the schematic diagram and the replacement parts list. It is essential that these critical parts should bereplaced with the manufa...

Page 4 - SERVICING PRECAUTIONS

- 4 - SERVICING PRECAUTIONS CAUTION: Before servicing receivers covered by thisservice manual and its supplements and addenda, readand follow the SAFETY PRECAUTIONS on page 3 of thispublication.N O T E : I f u n f o r e s e e n c i r c u m s t a n c e s c r e a t e c o n f l i c tbetween the followi...

Page 7 - TIMING CHART; Mode; Video

- 7 - TIMING CHART * No Composite Mode. H 37.50 26.67 20.32 6.35 0.51 2.03 3.81 V 74.99 13.335 12.802 0.533 0.026 0.08 0.427 H + 46.88 21.33 16.16 5.17 0.32 3.223 V + 75.01 13.331 12.798 0.533 0.021 0.064 0.448 H + 53.68 18.63 14.22 4.41 0.57 1.14 2.70 V + 85.07 11.755 11.178 0.577 0.018 0.056 0.503...

Page 8 - D IS A S S E MB LY; T IL T /S W IV E L & B A C K C O V E R R E MO V A L

- 8 - D IS A S S E MB LY 1. T IL T /S W IV E L & B A C K C O V E R R E MO V A L 1) S e t the monitor fa ce downwa rd.2) C a re fully re move the T ilt/S wive l by pulling it upwa rd.3) Remove the screw (b), B a ck cove r by pus hing it upwa rd. 4) R e le a s e the la tch (c). (S e e T ip S pe c....

Page 9 - WIRING DIAGRAM; FBT

WIRING DIAGRAM - 9 - P501 P201 P405 P301 P302 G2 P702 P701 T1 P402 P902 S + S Signal Cable AC Socket FBT P203 P202 P220 P904

Page 10 - BLOCK DIAGRAM

BLOCK DIAGRAM - 1 0 - Po wer In pu t 100~ 240 V AC (50/ 60H z) Li ne Fi lter D eg au ssi ng C ir cu it [ O SD C on tro l ] SM PS C on tro l (IC 901) TI LT C on tro l C ir cu it 6. 3V E 2 PR OM (IC 402) 5V H -Syn c V- Syn c I 2 C D AT A(SD A) I 2 C C LOC K (SC L) VI D EO Pr e- AM P / OSD (IC 302) Vi ...

Page 11 - DESCRIPTION OF BLOCK DIAGRAM; When you turn on the power switch, the operating

DESCRIPTION OF BLOCK DIAGRAM - 11 - 1. SMPS(Switching Mode Power Supply) When you turn on the power switch, the operating fprocedure is as follows: . 6. X-RAY Protection Circuit When the high Voltage reaches to 29kV in an abnormal case, the high voltage detector circuit, R818,D721,C739-1 R416, C409 ...

Page 13 - Preparation for Service Adjustment; GENERAL INFORMATION; • Alignment appliances and tools.; ADJUSTMENT PROCEDURE & METHOD; Install the cable for adjustment such as Figure 1and run; Adjustment by Service Hot key; FOS SPEC; ADJUSTMENT

1. Preparation for Service Adjustment GENERAL INFORMATION All adjustment are thoroughly checked and correctedw h e n t h e m o n i t o r l e a v e s t h e f a c t o r y , b u t s o m e t i m e sseveral adjustments may be required. A d j u s t m e n t s h o u l d b e f o l l o w i n g p r o c e d u r...

Page 14 - Luminance; A d j u s t m e n t o f w h i t e b a l a n c e ( A d j u s t m e n t o f

- 14 - 4. Distortion Scanning frequency : All Mode (Mode 1~4)Display image : Crosshatch patternHorizontal : 10 RowVertical : 8 Row A-B 2.0mm, C-D 2.0mm E-F 2.0mm, G-H 2.0mm 5. Displa Size drift 4mm : 25 Standard, 10 35 0.5mm : 180V ~ 264V 6. Linearity Formula : (Max - Min) / Max x 100(%) Criteria : ...

Page 16 - Adjustment Using Service software Program

- 16 - 3. Adjustment Using Service software Program (Adjustment Program) 1. Adjustment for Factory Mode (Preset Mode). 1) Display cross hatch pattern at Mode All.2) Run alignment program for T730BHKL/T730SHKL on the IBM compatible PC. 3) EEPROM → ALL CLEAR → Y(Yes) command. <Caution> Do not ru...

Page 17 - Using Service software Program; Read and Modify EDID Data

4. EDID Data Edit Using Service software Program 4.1 Read and Modify EDID Data 1) Connector the monitor and adjust device as Figure1 2) Display color 15,0 cross hatch pattern at Mode 4. 3) Use EDIT – MODEL SEL. command to select the right model info file. 4) Use EDIT – EDID INFO command and return t...

Page 18 - Fi gu re 1. Cable Con nec tio n

- 1 8 - - 18 - 220 IBM Compatible PC PARALLEL PORT Power inlet (required) Power LED ST Switch Power Select Switch (110V/220V) Control Line No t u se d RS 23 2C PA RALLEL V-S YNC POWER ST VG S MO NITO R E V-Sync On/Off Switch (Switch must be ON.) F A B C E F A B C 15 10 5 5 6 9 1 1 1 14 13 25 6 5V 5V...

Page 19 - TROUBLESHOOTING GUIDE; Waveforms

1 2 CHECK D900 BRIDGE DIODE? CHECK C908(+) VOLTAGE 145VDC at 110V input310VDC at 220V input IC901, Q901 CHECK D971, D961, D951, D904 D941, D942, D906 ? CHECK FUSE OK?(F901) - 19 - TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) NO NO NO NO TROUBLE IN Q951, Q952, Q941, Q942, TROUBLE ...

Page 22 - NO VERTICAL DEFLECTION

CHECK IC601 PIN 7 (45V)? CHECK IC401 PIN 33, 34 (SAWTOOTH WAVE)? CHECK IC601 Pin 3 (13V) ? - 22 - 4. NO VERTICAL DEFLECTION NO V-DEFLECTION (ONE HORIZONTAL LINE) NO NO NO TROUBLE IN IC601, V-CIRCUIT TROUBLE IN T901 13V Line Waveforms TROUBLE IN T701 40V line TROUBLE IN IC401 YES YES YES IC401, #33 I...

Page 23 - DPMS TABLE

3 CHECK IC401 PIN 45, 46 WAVEFORM? CHECK IC401 PIN , 50 ? CHECK Q941,Q951 CHECK IC401 (MICOM) PIN 52, 53 (H/V INPUT) SIGNAL? - 23 - 5. TROUBLE IN DPM 4 Stand-by/SUSPEND/ DPMS OFF MODE FAILURE INPUT H/V SYNC SIGNAL NO NO NO TROUBLE IN T901 or PC CHECK PC, (PC IS NOT GOING INTO DPM MODE) TROUBLE IN X4...

Page 26 - Cs SIGNAL TABLE

- 26 - 9. TROUBLE IN H-LINEARITY UNBALANCED OF H-LIN. CHECK IC401 PIN 11, 12,13 CHECK Q711~Q716? CHECK L703? TROUBLE IN IC401 (MICOM) TROUBLE INQ711 ~ Q716 TROUBLE INL703 TROUBLE INC722, C723, C726, C729 NO NO NO YES YES YES Cs SIGNAL TABLE HORIZONTALFREQUENCY(fH) 30K ~ 33.9K 34K ~ 38.9K 39K ~ 43.9K...

Page 27 - Side Pin or Trap Failure

Check if AC Voltage of IC401 Pin 35 waveform is Variable T701 pin 2 voltage is change with H frequency? The Voltage waveform Q706 Collector is right? - 2 7 - 10. Abnormal H_Size NO NO Repeat the troubleshootingGuide of H_deflection failure. Check D/D converter circuitCheck IC401 B+ control circuit. ...

Page 29 - High Voltage Failure

Q706 collecter waveform is right? 15. High Voltage Failure NO NO Replace T701 Check Q719,Q720Check 50V line Repeat the troubleshootingGuide of H_deflection failure. YES YES 16. ABL Failure YES NO Check and replace CRT Input full white pattern to monitor. Check P302, D801, R801~803, R798. Check and r...

Page 32 - User Control Failure

Proper Video levels are on P301 Pin 1, 3 and 5. IC401 Pins 27 and 28 inputs are right at each function? 20. User Control Failure Check connector Ass’y. NO Done. Check and replace IC401. Check and replace function key. YES 21. Missing Color NO Change the CRT. Check signal generator andsignal cable. N...

Page 35 - EXPLODED VIEW

EXPLODED VIEW - 35 - 10 12 12 13 11-2 11-1 7 B A 2 6 5 a b b 1 d 15 14 15 3 9 c 8

Page 36 - EXPLODED VIEW PARTS LIST

EXPLODED VIEW PARTS LIST - 36 - Description CDT(CIRC), M41QEE903X 21 NDDP LG-PHILIPS 85KHZ 29.1MM FCDT TCO PLUS (T730BHKL) TILT SWIVEL ASSEMBLY, T710BJ T069/B058 60HR 8C358 BRAND SCREW ASSEMBLY, TAPTITE P TYPE D5.0 L25.0 MSWR/FZMY . FBT (FLY BACK TRANSFORMER) 1063A,F700BK(71K) JUNGWOO 17'' SOCKET(CI...

Page 37 - REPLACEMENT PARTS LIST; CAUTION: BEFORE REPLACING ANY OF THESE COMPONENTS,

- 37 - REPLACEMENT PARTS LIST CAUTION: BEFORE REPLACING ANY OF THESE COMPONENTS, READ CAREFULLY THE SAFETY PRECAUTIONS IN THIS MANUAL. * NOTE : S SAFETY Mark AL ALTERNATIVE PARTS *S *AL LOC NO . PART NO. DESCRIPTION/SPECIFICATON C A P A C I T O R s C 3 0 1 0 C Q 1 0 2 1 N 4 0 9 0.001UF D 100V 5% PE ...