LG Flatron L1932P Service Manual Download Page 16 | Manualshive

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3. NO RASTER (OSD IS NOT DISPLAYED) – MSTAR

NO RASTER

(OSD IS NOT DISPLAYED)

NO

NO

NO

TROUBLE IN CABLE

OR LCD MODULE

CHECK U801 (17", 19")
CHECK U803 (15")

1. CHECK PIN122, 123

SOLDERING CONDITION

2. CHECK X501
3. TROUBLE IN U201

CHECK CONNECTION
LINE FROM D-SUB TO
U501

U201

PIN 106,1

3.3V?

U201

PIN55, 56

OSCILLATE AS

24MHZ?

U201

PIN101 IS 64KHz H-SYNC?

PIN102 IS 60Hz V-SYNC?

IS PULSE APPEARED

AT SIGNAL PINS?

AT MODE 12?

1

2

1

2

Waveforms

U201-#55,56

U201-#101 H-SYNC

2

U201-#102 V-SYNC

YES

YES

YES

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Summary of Contents for Flatron L1932P

Page 1: ...NUAL Website http biz LGservice com E mail http www LGEservice com techsup html CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS NO LM51A MODEL L1932P L1932P DNN AX QS Same model for Service ...

Page 2: ...ical 56 75Hz 4 Max Resolution D sub Analog 1280 x 1024 75Hz Digital 1280 x 1024 60Hz 5 POWER SUPPLY 5 1 Power AC 100 240V 50 60Hz 0 6A 5 2 Power Consumption 6 ENVIRONMENT 6 1 Operating Temperature 10 C 35 C 50 F 95 F Ambient 6 2 Relative Humidity 10 80 Non condensing 6 3 MTBF 50 000 HRS with 90 Confidence Lamp Life 50 000 Hours Min 7 DIMENSIONS with TILT SWIVEL Width 430 mm 16 93 Depth 242 mm 9 53...

Page 3: ... Protect the module from the ESD as it may damage the electronic circuit C MOS Make certain that treatment person s body are grounded through wrist band Do not leave the module in high temperature and in areas of high humidity for a long time The module not be exposed to the direct sunlight Avoid contact with water as it may a short circuit within the module If the surface of panel become dirty pl...

Page 4: ...t receiver ground lead to the receiver chassis ground before connecting the test receiver positive lead Always remove the test receiver ground lead last 9 Use with this receiver only the test fixtures specified in this service manual CAUTION Do not connect the test fixture ground strap to any heat sink in this receiver Electrostatically Sensitive ES Devices Some semiconductor solid state devices c...

Page 5: ...tip as the solder melts 2 Draw away the melted solder with an anti static suction type solder removal device or with solder braid before removing the IC Replacement 1 Carefully insert the replacement IC in the circuit board 2 Carefully bend each IC lead against the circuit foil pad and solder it 3 Clean the soldered areas with a small wire bristle brush It is not necessary to reapply acrylic coati...

Page 6: ...onnection 4 Route the jumper wire along the path of the out away copper pattern and let it overlap the previously scraped end of the good copper pattern Solder the overlapped area and clip off any excess jumper wire At Other Connections Use the following technique to repair the defective copper pattern at connections other than IC Pins This technique involves the installation of a jumper wire on t...

Page 7: ...ls 57 283 49 725 1152 832 32 64 224 832 x 624 V Lines 74 55 667 624 1 3 39 8 H Pixels 65 0 48 363 1344 1024 24 136 160 1024 x 768 V Lines 60 0 806 768 3 6 29 9 H Pixels 78 75 60 123 1312 1024 16 96 176 1024 x 768 V Lines 75 029 800 768 1 3 28 10 H Pixels 100 0 68 681 1456 1152 32 128 144 1152 x 870 V Lines 75 062 915 870 3 3 39 11 H Pixels 92 978 61 805 1504 1152 18 134 200 1152 x 900 V Lines 65 9...

Page 8: ...DISASSEMBLY 8 Remove the screws Disassembly back door Disassemble back cover Pull up the cabinet corner side 1 2 3 4 ...

Page 9: ...3 ADC LVDS Transmitter 129 75MHz Panel MCU EEPROM System LVDS Analog R G B D Sub To Key Control 5VMOD 3 3V 1 8V Regulator 24MHz 3 3V 1 8V EEPROM Switch System 5V MOD ON 5V 2 5V TMDS DVI D EEPROM PLL Scaling OSD Memory Interface DDR Memory 128Mbit 156MHz 2 5V TMDS RX ...

Page 10: ...nal and outputs 8 bit R G B signal to transmitter 2 Power Part This part consists of the one 3 3V and one 1 8V regulators to convert power which is provided 5V in Power board 12V is provided for inverter 5V is provided for LCD panel and micom Also 5V is converted 3 3V and 1 8V by regulator Converted power is provided for IC in the main board The inverter converts from DC12V to AC 700Vrms and opera...

Page 11: ...DC voltage through a bridge rectifier and a bulk capacitor 3 Energy Transfer This part function is for transfer the primary energy to secondary through a power transformer 4 Output rectifier and filter This part function is to make a pulse width modulation control and to provide the driver signal to power switch to adjust the duty cycle during different AC input and output loading condition to ach...

Page 12: ... is available to LCD Monitor only 1 Port Setup a Copy UserPort sys file to c WINNT system32 drivers folder b Run Userport exe c Remove all default number d Add 300 3FF e Click Start button f Click Exit button 2 EDID Read Write 1 Run WinEDID exe 2 Edit Week of Manufacture Year of Manufacture Serial Number a Input User Info Data b Click Update button c Click Write button ...

Page 13: ...display 2 Wait for about 5 seconds and press MENU POWER switch with 1 second interval 3 The SVC OSD menu contains additional menus that the User OSD menu as described below a Auto Color W B balance and Automatically sets the gain and offset value b NVRAM INIT EEPROM initialize 24C08 c CLEAR ETI To initialize using time d AGING Select Aging mode on off e R G B 9300K Allows you to set the R G B 9300...

Page 14: ...RT POINT AS OPENING EACH POWER LINE NO PROBLEM 1 Waveforms U201 56 CHECK KEY CONTROL CONNECTOR ROUTINE CHECK U201 NO NO CHECK 5VS LINE OPEN CHECK CHECK 3 3V LINE NO CHECK X TAL YES CHECK J806 VOLTAGE PIN5 PIN6 5V CHECK U502 PIN 8 VOLTAGE 5V IS U201 PIN106 3 3V VOLTAGE CHECK U201 PIN 56 PULSE 1 YES YES YES ...

Page 15: ...OARD AND FIND OUT A SHORT POINT AS OPENING EACH POWER LINE CHECK MICOM INV ON OFF PORT 1 CONFIRM BRIGHTNESS OSD CONTRL STATE 2 CHECK MICOM DIM ADJ PORT LIPS J806 PIN5 PIN6 5V J806 PIN9 5V J806 PIN10 5V CHECK PULSE AS CONTACTING SCOPE PROBE TO CAUTION LABEL CONTACT PROBE TO CAUTION LABEL CAN YOU SEE PULSE AT YOUR SCOPE YES YES YES YES ...

Page 16: ...803 15 1 CHECK PIN122 123 SOLDERING CONDITION 2 CHECK X501 3 TROUBLE IN U201 CHECK CONNECTION LINE FROM D SUB TO U501 U201 PIN 106 1 3 3V U201 PIN55 56 OSCILLATE AS 24MHZ U201 PIN101 IS 64KHz H SYNC PIN102 IS 60Hz V SYNC IS PULSE APPEARED AT SIGNAL PINS AT MODE 12 1 2 1 2 Waveforms U201 55 56 U201 101 H SYNC 2 U201 102 V SYNC YES YES YES ...

Page 17: ...PM TROUBLE IN DPM NO NO TROUBLE IN U501 CHECK PC PC IS NOT GOING INTO DPM OFF MODE CHECK H V SYNC LINE CHECK R223 R823 R222 R825 CHECK U201 PIN 101 103 SYNC PULSE 3 3 Waveforms R223 R823 H Sync 3 R222 R825 V Sync YES YES ...

Page 18: ...WIRING DIAGRAM 18 11P 6P 30P 6631T11012W or 6631T11020W 6631T12006L 6631T20023A ...

Page 19: ...EXPLODED VIEW 19 010 090 020 100 110 120 130 140 030 150 160 050 040 130 080 070 060 ...

Page 20: ...ssembly L1932P NON GRAY ABS DUAL CORE P TYPE CORE T CKD 3043TKK190T Base Assembly L1932P STAND BODY GRAY CKD 3043TKK191H Base Assembly L1932P STAND BASE GRAY CKD 49509K0017B Plate PRESS SPTE T0 3 SHIELD L1932 CHASSIS BRACKET CKD 68719ST941E PCB Assembly Sub SUB T T LM51A L17 1932P DNN ONLY SXEUQSP MA SKD 4940TKT272C Knob TACT CONTROL 5KEY LX32 GRAY 3550TKK989B Cover MOLD ABS LXX32 PIECE INSULATOR ...

Page 21: ...NO DESCRIPTION SPECIFICATION C511 0CC030CK01A 0603N3R0C500LT 3pF 0 25PF 50 C512 0CC180CK41A C1608C0G1H180JT 18pF 5 50V C513 0CH8106F611 MV4 0TP16VC10M 10uF 20 16V C514 0CC101CK41A C1608C0G1H101JT 100pF 5 50V C515 0CC101CK41A C1608C0G1H101JT 100pF 5 50V C516 0CC101CK41A C1608C0G1H101JT 100pF 5 50V C702 0CK104CF56A 0603B104K160CT 100nF 10 16V C703 0CK104CF56A 0603B104K160CT 100nF 10 16V C704 0CK104C...

Page 22: ... 6V 60V 40V Q503 0TRIH80001A RT1C3904 T112 NPN 6V 60V 40V Q506 0TRIH80001A RT1C3904 T112 NPN 6V 60V 40V Q508 0TRIH80001A RT1C3904 T112 NPN 6V 60V 40V Q804 0TR390609FA KST3906 MTF PNP 5V 40V 40 Q805 0TR390609FA KST3906 MTF PNP 5V 40V 40 AR701 0RJ0472C687 RCA86TRJ47R0 47OHM 5 1 16W AR702 0RJ0472C687 RCA86TRJ47R0 47OHM 5 1 16W AR703 0RJ0472C687 RCA86TRJ47R0 47OHM 5 1 16W AR704 0RJ0472C687 RCA86TRJ47R...

Page 23: ...330 33OHM 5 1 10W R837 0RJ0222D677 MCR03EZPJ220 22OHM 5 1 10W R840 0RJ0222D677 MCR03EZPJ220 22OHM 5 1 10W R842 0RJ0222D677 MCR03EZPJ220 22OHM 5 1 10W R845 0RJ0102D677 MCR03EZPJ100 10OHM 5 1 10W R846 0RJ4700D677 MCR03EZPJ471 470OHM 5 1 10W R847 0RJ4700D677 MCR03EZPJ471 470OHM 5 1 10W R848 0RJ1000D677 MCR03EZPJ101 100OHM 5 1 10W R849 0RJ1000D677 MCR03EZPJ101 100OHM 5 1 10W R851 0RJ0222D677 MCR03EZPJ...

Page 24: ...SCHEMATIC DIAGRAM 24 1 SCALER 1 2 3 1 2 U201 55 56 U201 101 H SYNC 2 U201 102 V SYNC 3 R223 R823 H Sync 3 R222 R825 V Sync ...

Page 25: ... 25 2 MICOM ...

Page 26: ... 26 3 MEMORY ...

Page 27: ... 27 4 JACK WAFER 3 3 Waveforms R223 R823 H Sync 3 R222 R825 V Sync ...

Page 28: ... 28 5 POWER ...

Page 29: ...Apr 2006 P NO 38289S0041 Printed in Korea ...

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