LG T710BH Service Manual
LG T710BH Manual
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- LG T710BH | Service Manual - Page 1
.LGservice.com E-mail:http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL CHASSIS NO. : CA-119 FACTORY MODEL: T710BH MODEL: T710B (T710BH-EL) T710BH (T710BH-HL) T710SH (T710BH-SL) *( ) ID LABEL Model No. CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS - LG T710BH | Service Manual - Page 2
SPECIFICATIONS 2 SAFETY PRECAUTIONS 3 TIMING CHART 4 OPERATING INSTRUCTIONS 5 WIRING DIAGRAM 6 DISASSEMBLY 7 BLOCK DIAGRAM 8 DESCRIPTION OF BLOCK DIAGRAM 9 ADJUSTMENT 11 TROUBLESHOOTING GUIDE 13 EXPLODED VIEW 23 REPLACEMENT PARTS LIST 25 PIN CONFIGURATION 30 SCHEMATIC Resolution - LG T710BH | Service Manual - Page 3
monitor which are important for safety. These parts are marked on the schematic monitor and AC power line before servicing the chassis. • In servicing, no possibility of an X-radiation problem. The basic precaution which must (+) to the CDT anode cap. • Set the brightness control to maximum point at - LG T710BH | Service Manual - Page 4
Active Blanking Time Sync Duration Time (B) (C) (E) Back Porch (F) Front Porch (D) Resolution H- 1 V- 37.50 74.99 26.67 13.335 20.32 12.802 0.026 640x480 75Hz H+ 2 V+ 46.88 75.01 21.33 13.331 16.16 12.798 5.17 0.533 1.62 0.064 3.23 0.448 0.32 0.021 800x600 75Hz H+ 3 V+ 53.68 85 - LG T710BH | Service Manual - Page 5
ON/OFF Button Use this button to turn the monitor ON or OFF. 2. Power Indicator This indicator lights up green when the monitor operates normally; in DPMS (Energy Saving) mode, - stand-by, suspend, or power off mode - its color changes to orange, and if abnormal or damaging circuit turns out orange - LG T710BH | Service Manual - Page 6
WIRING DIAGRAM P201 P402 P405 P501 S+ S P702 P701 FBT AC Socket P902 T1 Signal Cable P302 P301 G2 -6- - LG T710BH | Service Manual - Page 7
DISASSEMBLY 1. TILT/SWIVEL & BACK COVER REMOVAL 1) Set the monitor face downward. 2) 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). (See Tip Spec.) 5) Slide the Back Cover away from the Front Cabinet of the - LG T710BH | Service Manual - Page 8
ROTATION RECALL DEGAUSS 5V OSD TIME COLOR CURVE MOIRE LANGUAGE RESET VIDEO LEVEL MICOM (IC401) E2PROM (IC402) H-Sync Sig Q706) B+ Line Filter (T901) 6.3V H-Linearity Correction 400V Dynamic POWER INPUT 100~240VAC SMPS CONTROL -10V (IC901) DPM CONTROL CIRCUIT Voltage Regulating - LG T710BH | Service Manual - Page 9
power switch. When you need to degauss in using the monitor, select DEGAUSS on the OSD menu. 3. SMPS(Switching Mode Power frequency of H and V sync. 3) The Micom sets operating mode and offers the controlled data. (H-size, each mode is stored in itself. 5) User can adjust screen condition by each OSD - LG T710BH | Service Manual - Page 10
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. 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 - LG T710BH | Service Manual - Page 11
Adaptor and Software. - Digital . 17) Adjust TRAPEZOID as MANUAL DEGAUSSING The degaussing coil is mounted around the CDT so that automatic degaussing when turn on the monitor. But a monitor alignment program for T710BH on the IBM be erased. 4) Power button of the monitor turn off → 1) Set the - LG T710BH | Service Manual - Page 12
17-2) Display color 15,0 window patten(70x70mm) at mode 4. 18) Adjust SUB-CONTRAST command to 50±2FL . 19) Display color 15,0 full white patten at Mode 4. 20) Set of monitor. 3) Exit from the alignment program. 4) Power switch OFF/ON for EDID data save. 5. Adjustment for Focus. 1) Set the Brightness - LG T710BH | Service Manual - Page 13
TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) CHECK FUSE OK? YES CHECK C908 VOLTAGE? (AC120V: 160VDC, AC220V: 304VDC) YES CHECK Q901 PIN 6 WAVEFORM (SQUARE WAVE COMES OUT?) YES CHECK D941, D942, D951, D961, D971 VOLTAGE? YES TROUBLE IN Q903, Q952, Q951, Q942, Q941 NO TROUBLE IN - LG T710BH | Service Manual - Page 14
PIN 1, 2, 4 ? YES CHECK R, G, B CATHODE VOLTAGE? YES TROUBLE IN CRT SOCKET 2. NO CHARACTER NO TROUBLE IN P302 5V LINE TROUBLE IN NO PC SIGNAL, P301 SIGNAL CABLE NO TROUBLE IN IC302 NO TROUBLE IN P303 12V LINE/ 80V LINE NO TROUBLE IN IC303 NO TROUBLE IN R331~R333, L311~L313 D307 - LG T710BH | Service Manual - Page 15
NO VIDEO (POWER INDICATOR ON) CHECK POWER INDICATOR GREEN or AMBER? GREEN CHECK D712 ANODE (-160V)? YES CHECK G1 VOLTAGE? (-55V~ -15V) YES CHECK CDT HEAT VOLTAGE? (6.3V) YES TROUBLE IN CDT 3. NO RASTER AMBER NO NO NO - 15 - DPM MODE (NO H and/or V SYNC) TROUBLE IN D712 TROUBLE IN Q799 TROUBLE IN - LG T710BH | Service Manual - Page 16
(ONE VERTICAL LINE) CHECK Q706? YES CHECK B+ VOLTAGE (50V)? YES CHECK T701(FBT) PIN 2 (31KHZ 60V, 69KHZ 140V) ? YES CHECK Q705 COLLECTOR WAVEFORM? 0V T YES TROUBLE IN T701, P701 NO TROUBLE IN Q706 NO TROUBLE IN 50V LINE NO TROUBLE IN Q719, Q703, D704, D710 NO - LG T710BH | Service Manual - Page 17
IN Q711 ~ Q716 NO TROUBLE IN L703 Cs SIGNAL TABLE HORIZONTAL FREQUENCY(fH) Cs1 Cs2 Cs3 30K ~ 33.9K L L L 34K ~ 38.9K L H H 39K ~ 43.9K H L H 44K ~ 48.9K H L H 49K ~ 51.9K H H L 52K ~ 57.9K H H L 58K ~ 61.9K H H L 62K ~ 65.9K H H H 66K ~ 70K H H H - 17 - - LG T710BH | Service Manual - Page 18
6. NO VERTICAL DEFLECTION NO V-DEFLECTION (ONE HORIZONTAL LINE) CHECK IC601 PIN 2 (13V+)? YES NO TROUBLE IN D610 13V+ LINE CHECK IC701 PIN 23? 3V YES NO TROUBLE IN IC701 TROUBLE IN IC601, V-CIRCUIT - 18 - - LG T710BH | Service Manual - Page 19
5, 10 NO WAVEFORM? Pin 10 Pin 5 5V YES CHECK IC301 PIN 12 NO WAVEFORM ? H+V 5V YES CHECK NO IC301 PIN 13, 14, 15 ? H+V 5V YES TROUBLE IN OSD PERIPHERAL CIRCUIT TROUBLE IN 5V LINE TROUBLE IN IC601 PIN1 (V-FBP), T701 40V LINE (H-FBP - LG T710BH | Service Manual - Page 20
(DPMF: 0V) CHECK B+ LINE NO (6.3V,13V+, 105V) ? CHECK PC, (PC IS NOT GOING INTO DPM OFF MODE) TROUBLE IN X401 TROUBLE IN IC401 (MICOM) TROUBLE IN Q941, Q942, Q951, Q952, YES TROUBLE IN PC Mode Item NORMAL STAND-BY SUSPEND OFF DPM TABLE DPMF H L L L DPMS H H H L LED GREEN AMBER AMBER AMBER - LG T710BH | Service Manual - Page 21
THE OSD MENU MUST BE PRESSED.) CHECK IC401 PIN 1 (0V)? YES CHECK Q953 COLLECTOR (15V) VOLTAGE? DC 15V YES CHECK P902 ? YES CHECK RL901? YES TROUBLE IN TH901, DEGAUSSING COIL NO NO NO NO TROUBLE IN IC401 (MICOM) TROUBLE IN Q953 TROUBLE IN P902 TROUBLE IN RL901 - 21 - - LG T710BH | Service Manual - Page 22
10. NO TILT (NO ROTATION ) NO TILT (NO ROTATION) CHECK IC401 PIN21 WAVE FORM ? YES CHECK 13V LINE AND 6.3V LINE ? YES CHECK Q503 EMITTER VOLTAGE ? YES TROUBLE IN P501, TILT COIL NO TROUBLE IN IC401 (MICOM) NO TROUBLE IN 15V LINE, 6.3V LINE NO TROUBLE IN Q501~Q503 - 22 - - LG T710BH | Service Manual - Page 23
EXPLODED VIEW - 23 - 5 3 2 1 MENU BSrEigLhEtvCieTw b 9 6 7b c 8a B A 10 11 12 13 14-2 4 12 14-1 - LG T710BH | Service Manual - Page 24
WITH EARTH FBT (FLY BACK TRANSFORMER), 1055A, CB777H LG-PHILIPS 17"/70KHZ FST SOCKET(CIRC), POWER, BAE EUN AC UNIVERSAL 3PIN BLACK-(T710BH-EL), (T710BH-HL) SOCKET(CIRC), POWER, SA-4S HUA JIE AC UNIVERSAL 3PIN BLACK -(T710BH-EL), (T710BH-HL) SOCKET(CIRC), POWER, CDJ-3C DUOLING AC UNIVERSAL 3PIN BLACK - LG T710BH | Service Manual - Page 25
: 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. CAPACITORS DATE: 2003. 01. 24. DESCRIPTION / SPECIFICATION C201 C301 C302 C303 C305 C306 C307 C308 C309 C310 C311 C312 C313 C314 - LG T710BH | Service Manual - Page 26
0DZ560009AG ZD404 0DZ560009AG ZD405 0DZ560009AG ZD407 0DZ560009AG ZD410 0DZ560009AG ZD701 0DZ120009BF ZD702 971-0054 ZD902 0DZ510009BE DATE: 2003. 01. 24. DESCRIPTION / SPECIFICATION MUR460L-1121 TIWAN SEMI BK D DTV1500MFP ST SGS-THOMSON TO SB140 GULF TP DO41 40V 1A 40 GRD07-15L-5705 GENERAL SEMIC - LG T710BH | Service Manual - Page 27
Q901 0TF760000AD Q903 0TR100809AA Q941 0TR319809AA Q942 0TR928009AB Q951 0TR319809AA Q952 0TR928009AB Q953 0TR319809AA DATE: 2003. 01. 24. DESCRIPTION / SPECIFICATION IRF630A BK SAMSUNG 200V 9A T KSP92 TP SAMSUNG TO92 HIGH V SSS7N60B FAIRCHILD ST TO220F KSC1008C-Y TP SAMSUNG TO92 KTC3198-Y(KTC1815 - LG T710BH | Service Manual - Page 28
R764 971-0054 R765 0RD3000A609 R766 0RD6200A609 R767 971-0054 R768 0RD5103A609 R769 971-0054 R771 0RN2001F409 DATE: 2003. 01. 24. DESCRIPTION / SPECIFICATION 100 1/4W(3 5% TA52 100 1/4W(3 5% TA52 1.50K 1/4W(3 5% TA52 82K 1/6W 1% TA52 11K 1/6W 1% TA52 10K 1/4W(3 5% TA52 2.70K 1/4W(3 5% TA52 24 - LG T710BH | Service Manual - Page 29
VR901 180-035G X401 6212AA2004A DATE: 2003. 01. 24. DESCRIPTION / SPECIFICATION AFC-520 BAE EUN TA TIME LAG HBC 5A/250V,215 005 4.70 LGEC NON 12 20 HO SKHV10911A LGEC NON 12 20 HO "1055A, CB777H LG-PHILIPS 17""" EE2218 2.3 MH D/FOCUS(CB775C EI2218 4.0MH H-DRIVE,EB770G EER3940 230UH V-16PIN - LG T710BH | Service Manual - Page 30
SCL 29 Vcc 28 BOut 27 GND 26 HOut 25 XRay 24 EWOut 23 VOut 22 VCap 21 VGND 20 VAGCCap 19 VOscF 18 VEHTIn 17 HEHTIn STV6888 PIN CONFIGURATION LOW-COST I2C CONTROLLED DEFLECTION PROCESSOR FOR MULTISYNC - LG T710BH | Service Manual - Page 31
Block Diagram Horizontal position H-moirØ amplitude Control voltage level : Functions controlled via I2C Bus Pin cushion asymm. Parallelogram Hor. duty cycle B+ ref. - 31 - VDyCor amplitude S-correction C-correction Vertical size Vertical position Vertical moirØ H size Pin cushion Keystone - LG T710BH | Service Manual - Page 32
Pin Configuration STV9211 Pin Description - 32 - - LG T710BH | Service Manual - Page 33
BLOCK DIAGRAM STV9211 - 33 - - LG T710BH | Service Manual - Page 34
Pin Configuration BLOCK DIAGRAM STV9556 11 OUT1 10 OUT2 9 OUT3 8 GNDP 7 VDD 6 GNDS 5 GNDA 4 IN3 3 VCC 2 IN2 1 IN1 - 38 - - LG T710BH | Service Manual - Page 35
DDC-SDA DDC-SCL IIC-SDA IIC-SCL SCHEMATIC DIAGRAM - 34 - - 35 - - LG T710BH | Service Manual - Page 36
1. CONTROL BOARD (Component Side) PRINTED CIRCUIT BOARD 2. CONTROL BOARD (Solder Side) 3. MAIN BOARD (Component Side) 4. MAIN BOARD (Solder Side) - 36 - - 37 - - LG T710BH | Service Manual - Page 37
P/NO : 3828TSL091L Feb. 2003 Printed in Korea
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COLOR MONITOR
SERVICE MANUAL
Website:http://biz.LGservice.com
CAUTION
BEFORE SERVICING THE UNIT,
READ THE
SAFETY PRECAUTIONS
IN THIS MANUAL.
MENU
SELECT
Brightview
MODEL:
T710B
(T710BH-EL)
CHASSIS NO. : CA-119
FACTORY MODEL: T710BH
T710BH
(T710BH-HL)
T710SH
(T710BH-SL)
*(
) ID LABEL Model No.