LG RDJT50 1024X768 XGA User manual

DLPPROJECTOR
SERVICEMANUAL
MODEL RD-JT50/51/52
CAUTION
BEFORESERVICINGTHEPROJECTOR,
READTHESAFETYPRECAUTIONSINTHISMANUAL.

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Contents
1.SafetyPrecautions3
2.Servicing Precautions4
3.Specifications5
4.Exploded View7
5.Replacement PartsList8
6.BlockDiagram12
7.Packaging Description 14
8.AppearanceDescription 16
9.AlignmentProcedure 17
10.Howtoassemblethe set38
11.FAQ(FrequentlyAsked Questions)48
12.TroubleShooting Guide 49
13.ServiceAdjustmentGuide 61
14.Firmware upgrade procedure 72
15.RS232 Codes76
16.SchematicsofJT51 81
SchematicsofJT50/52 108

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5
3. Specifications
ProjectorSpecificationforJT51
Technical Specifications
Note:All specificationsaresubject tochange without notice
General
Product namePersonalProjector
ModelnameRD-JT51 800*600 SVGA
Optical
Displaysystem1-CHIPDMD
LensF/NumberF/2.6
Lamp200WNSHLAMP
Electrical
PowersupplyAC100~240V, 3.2A, 50/60Hz(Automatic)
Powerconsumption 285W(Max)
Mechanical
Dimensions302.3mm (W) 91.7mm (H) 216.3mm(D)
Operatingtemperaturerange 0°C~40°C
Weight6.6lbs(3.0Kg)
Inputterminal
Computerinput
D-SUBIND-sub15-pin(female)
Video signalinput
S-VIDEOMiniDIN4-pinport x1
VIDEORCAjack x1
HDTVsignalinput Dósub<->YpbPrRCAjack x3,through D-SUBIN
terminal

6
ProjectorSpecificationforJT50/52
Technical Specifications
Note:All specificationsaresubject tochange without notice
General
Product namePersonalProjector
ModelnameRD-JT50 1024*768 XGA
RD-JT52 1024*768 XGA
Optical
Displaysystem1-CHIPDMD
LensF/NumberF/2.6
Lamp250WUHPLAMP
Electrical
PowersupplyAC100~240V, 4.0A, 50/60Hz(Automatic)
Powerconsumption330W(Typical)
Mechanical
Dimensions302.3mm (W) 91.7mm (H) 216.3mm(D)
Operatingtemperaturerange 0°C~35°C
Weight6.6lbs(3.0Kg)
Inputterminal
Computerinput
D-SUBIND-sub15-pin(female)
DVI-DDVI-D19-pin(female)
Video signalinput
S-VIDEOMiniDIN4-pinport x1
VIDEORCAjack x1
HDTVsignalinputD-sub<->YpbPrRCAjack x3, through D-SUBIN
Terminal
Audiosignalinput
AudioMinijack stereo port
Output
USBmouseconnectorA/Bseriesx 1
Speaker2watt x1
Control
RS-232C9-pinx1

é
4.ExplodedView
Theillustrationshowsexploded viewofJT51 projector.You canseethe major
componentsandopticalengine.
MainBoard
L
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s
B
a
ll
eat
F
a
nB
oa
r
d
L
a
m
p
B
o
x
RearFanModule
C
hi
p
B
oa
r
d
A
C
cab
l
e

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5.ReplacementPartsList
LGRD-JT51 99.J8677.L18
NO.BenQP/NLGP/NDESCRIPTION
155.J7612.051 6871VSN257B PCBAKEYPADBDPB7200 LGJT50
260.J7635.001 5020V00811B ASSY BUTTONJT50
360.J7668.001 3110V00320M ASSY SUBU/CJT51
423.10103.001 5900V03002H FAN12V70*70*25AXIALADDA
560.J7653.001 3720V00205G ASSY REARCOVERJT51
660.J8618.CG1 6912B22006D ASSY SERVICELAMP PB6100
755.J8620.001 6871VSN257E PCBAEMIBDPB6100
860.J7650.001 3110V00321G ASSY L/CJT51
955.J8608.001 6871VSN257K PCBAREARIRBDPB6100
10 54.J8612.001 6316000005D BALLASTPHG201G16PB6100
1155.J8601.051 6871VMN657L PCBAM/BDPB6100 LG JT51
12 60.J7619.001 3580V00094J ASSY DOORJT51 PB7200
13 60.J8617.002 4810V00854F ASSY LAMPBOXPB6100
14 55.J1313.001 6871VSN257G PCB1LSENSOR-BBDSL700XMI
15 65.J8603.001 3680V00118D CWDIA44DEG110 PB6100 PRODISC
16 23.10102.002 5900V03002J BLOWER12V50*50*20MMADDA
17 60.J8640.001 3680V00075D ASSY S2+EGN12D JT51
18 55.J8623.001 6871VSN257F PCBACHIPBDPB6100
19 65.J7605.001 3680V00116G PROJECTIONLENSZOOMJT50 ASI
20 71.08060.000 6871VSN271A ICDMD0.6SVGA8060-624C 12DD
21 55.J5019.001 6871VSN257J PCBATHERMALBDDX850
22 60.J7641.001 4810V00854D ASSY BARLONGJT50
23 60.J7642.001 4810V00854E ASSYBARSHORT JT50
24 60.J7664.001 3550V00343B ASSY LENSCAP JT50
25 60.J8613.001 6871VPM998B ASSY POWERMODULEPB6100
26 65.J5003.001 4778V00084B FOOT ADJDX850
27 44.J3401.091 3890V01751H CTN440*435*260 JT50/LG
28 49.J8602.002 3828VA0413G MANUALUSERLGRD-JT51PB6100
29 27.01018.000 6410VWH015A CORDH05VV-F13A250V1830MMU
30 27.01418.041 6410VWH051L CORDH05VV3G16A250VS-AFRI

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31 27.01818.000 6410VWH015B CORDSVT#18*3C 10A125V1830US
32 27.82718.281 6410VWH015C CORDH05VV-F10A250VEURBLK
33 50.72920.011 6851V00021L C.AMIN-DIN4PS-VIDEOW/S15
34 50.J1303.501 6851V00021S CABLERCAY/Y1600MM BLK
35 50.J2403.501 6851V00021H SIGNAL/C15/15P(-9)2500MM
36 56.26J86.011 6710V00106B REMOTECTRJT51SVGA(LG)-CR1
LGRD-JT50 99.J7677.L88
NO.BenQP/NLGP/NDESCRIPTION
160.J5016.CB1 6912B22006C ASSY CSDLAMP PB7200/7100
255.J7612.051 6871VSN257B PCBAKEYPADBDPB7200 LGJT50
360.J7635.001 5020V00811B ASSY BUTTONJT50
460.J7668.011 3110V00320K ASSY SUBU/CJT50
523.10099.011 5900V03002F FAN12V70*70*25 2810KL-04W NM
660.J7653.011 3720V00205F ASSY REARCOVERJT50
755.J7601.051 6871VMN657K PCBAMAINBDPB7200 LGJT50
855.J7614.051 6871VSN257C PCBAINPUTBDPB7200LGJT50
955.J7622.051 6871VSN257D PCBAEXT.BDPB7200 LGJT50
10 54.J3712.001 6316000005C BALLAST250WEUC 250 P/00
1155.J8620.001 6871VSN257E PCBAEMIBDPB6100
12 60.J7650.011 3110V00321F ASSY L/CJT50
13 23.10090.001 5900V03002G BLOWERDC 12VGB1205PKV1-8AY
14 60.J7647.001 3680V00075C ASSY OPTICALENGINEJT50
15 55.J8623.001 6871VSN257F PCBACHIPBDPB6100
16 65.J7605.001 3680V00116G PROJECTIONLENSZOOMJT50 ASI
17 71.07XGA.B00 6871VSN271B ICDMD0.7XGADDR 12
18 60.J7654.001 3580V00094H ASSY DOORJT50
19 60.J7671.001 4810V00854C ASSY LAMPBOXJT50
20 55.J1313.001 6871VSN257G PCB1LSENSOR-BBDSL700XMI
21 65.J4001.103 3680V00118C CWDIA44DEG90 DX850 PRODISC
22 55.J5019.001 6871VSN257J PCBATHERMALBDDX850
23 60.J7640.001 6871VSN257H ASSYPFC+FANBDJT50/52 PB720
24 60.J7641.001 4810V00854D ASSY BARLONGJT50
25 60.J7642.001 4810V00854E ASSYBARSHORT JT50
26 60.J7664.001 3550V00343B ASSY LENSCAP JT50

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27 65.J5003.001 4778V00084B FOOT ADJDX850
28 44.J3401.091 3890V01751H CTN440*435*260 JT50/LG
29 47.J7612.001 3920V00533E CUSHIONRIGHTEPEJT50
30 47.J7619.001 3880VA0026B BAGCARRYJT50
31 49.J7603.002 3828VA0413F MANUALUSERLGRD-JT5052
32 50.72920.011 6851V00021L C.AMIN-DIN4PS-VIDEOW/S15
33 50.73213.501 6851V00021G CABLE4PUSB A-B1800MM BLACK
34 50.J1303.501 6851V00021S CABLERCAY/Y1600MM BLK
35 50.J1311.001 6851V00021T CABLERCAR/W-AUDIO200MM
36 50.L5702.201 6851V00021W SIGNALDVI-D/DVI-D0022000MM
37 98.J3403.001 6710V00106A REMOTECONTROLLERDXS660 LG
38 27.01018.000 6410VWH015A CORDH05VV-F13A250V1830MMU
39 27.01418.041 6410VWH015L CORDH05VV3G16A250VS-AFRI
40 27.01818.000 6410VWH015B CORDSVT#18*3C 10A125V1830US
41 27.82718.281 6410VWH015C CORDH05VV-F10A250VEURBLK
42 50.74405.501 6851V00021M CABLEAUD PC99PT284C/PT577C B
43 50.J2401.001 6851V00021U CABLED-SUB/RCA1800MM/SL705X
44 50.J2403.501 6851V00021H SIGNAL/C15/15P(-9)2500MM
LGRD-JT52 99.J7777.L88
NO.BenQP/NLGP/NDESCRIPTION
160.J5016.CB1 6912B22006C ASSY CSDLAMP PB7200/7100
255.J7612.051 6871VSN257B PCBAKEYPADBDPB7200 LGJT50
360.J7635.001 5020V00811B ASSY BUTTONJT50
460.J7668.021 3110V00320L ASSY SUBU/CJT52
523.10099.011 5900V03002F FAN12V70*70*25 2810KL-04W NM
660.J7653.011 3720V00205F ASSY REARCOVERJT50
755.J7601.051 6871VMN657K PCBAMAINBDPB7200 LGJT50
855.J7614.051 6871VSN257C PCBAINPUTBDPB7200LGJT50
955.J7622.051 6871VSN257D PCBAEXT.BDPB7200 LGJT50
10 54.J3712.001 6316000005C BALLAST250WEUC 250 P/00
1155.J8620.001 6871VSN257E PCBAEMIBDPB6100
12 60.J7650.011 3110V00321F ASSY L/CJT50
13 23.10090.001 5900V03002G BLOWERDC 12VGB1205PKV1-8AY
14 60.J7647.001 3680V00075C ASSY OPTICALENGINEJT50

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15 55.J8623.001 6871VSN257F PCBACHIPBDPB6100
16 65.J7605.001 3680V00116G PROJECTIONLENSZOOMJT50 ASI
17 71.07XGA.B00 6871VSN271B ICDMD0.7XGADDR 12
18 60.J7654.001 3580V00094H ASSY DOORJT50
19 60.J7671.001 4810V00854C ASSY LAMPBOXJT50
20 55.J1313.001 6871VSN257G PCB1LSENSOR-BBDSL700XMI
21 65.J4001.103 3680V00118C CWDIA44DEG90 DX850 PRODISC
22 55.J5019.001 6871VSN257J PCBATHERMALBDDX850
23 60.J7640.001 6871VSN257H ASSYPFC+FANBDJT50/52 PB720
24 60.J7641.001 4810V00854D ASSY BARLONGJT50
25 60.J7642.001 4810V00854E ASSYBARSHORT JT50
26 60.J7664.001 3550V00343B ASSY LENSCAP JT50
27 65.J5003.001 4778V00084B FOOT ADJDX850
28 44.J3401.091 3890V01751H CTN440*435*260 JT50/LG
29 47.J7612.001 3920V00533E CUSHIONRIGHTEPEJT50
30 47.J7619.001 3880VA0026B BAGCARRYJT50
31 49.J7603.002 3828VA0413F MANUALUSERLGRD-JT5052
32 50.72920.011 6851V00021L C.AMIN-DIN4PS-VIDEOW/S15
33 50.73213.501 6851V00021G CABLE4PUSB A-B1800MM BLACK
34 50.J1303.501 6851V00021S CABLERCAY/Y1600MM BLK
35 50.J1311.001 6851V00021T CABLERCAR/W-AUDIO200MM
36 50.L5702.201 6851V00021W SIGNALDVI-D/DVI-D0022000MM
37 98.J3403.001 6710V00106A REMOTECONTROLLERDXS660 LG
38 27.01018.000 6410VWH015A CORDH05VV-F13A250V1830MMU
39 27.01418.041 6410VWH015L CORDH05VV3G16A250VS-AFRI
40 27.01818.000 6410VWH015B CORDSVT#18*3C 10A125V1830US
41 27.82718.281 6410VWH015C CORDH05VV-F10A250VEURBLK
42 50.74405.501 6851V00021M CABLEAUD PC99PT284C/PT577C B
43 50.J2401.001 6851V00021U CABLED-SUB/RCA1800MM/SL705X
44 50.J2403.501 6851V00021H SIGNAL/C15/15P(-9)2500MM

12
6.BlockDiagram
1. JT51
D_SUB S-Video
RCA
AnalgFlatPanel
Interface
AD9883
ImageProcessor
PW166
Flash
EEPROM
RGB 888
Signals
RGB888 signals
Address
Data
I2C
I2C
ControlSignals
I2C
Control Signals
Clock
signal
YUV422
I2C
ControlSignals

13
2. JT50/52

14
7.PackagingDescription
1. JT51

15
2. JT50/52

16
8.Appearance Description

17
9.AlignmentProcedure
JT51
1. DMDBiasVoltageAlignment
Equipment: None
Procedure:
WatchDMD BiasVoltageBin!Label(Example: 8060-7bbcDDDDXXXXXXXM)
Switchthe DIPswitch(SW2)onMainboardaccording tothe red characteron
theDMDchip
3.00: E
01: D
10: C
11: B
ON
00

18
2. ColorWheelDelay Alignment
Equipment:
BatteryBiased SiliconPINDetector
Oscilloscope
Probe
Procedure:
1.Probe impedancematches50 ohm
2.Open FactoryOSD, and select colorwheeldelayitem
3.Leavethe image purered (DMDred curtain)
4.Putthe detectoron thescreenthat red image wasprojected.
5.Watchthe oscilloscope and noticethe squarewaveform
6.Usethe ! and ! keytoincrement ordecrement thecolorwheeldelayvalue
7.Nomatterthewaveformissquareornot, let the waveformwaslaggedfirst
8.Thenincrement ordecrement the value tolet thewaveformtobesquare
9.Donotadjusttoo much, let the signalgetahead,if ithappens,goback tostep7
anddo it again.
10.Changethe input topureblueand repeatthe aboveproceduresagain.
3. PCColorAlignmentProcedure
Equipment:
Patterngenerator
Procedure:
1.Connect power, D-sub, intoprojector.
2.Change patterngeneratortopattern435-DISC.
3.Light on projector90
4.Enterfactorymode.
5.ChooseADCBrightness itemtoPress.
6.ChooseADCContrastitemtoPress.
7.Change patterngeneratortopattern32 graybar.
8.See ifanygraylevelwasabnormal,iftheabnormalityhappened,wentback to
step4and then redidit again.
9.Quit factorymode, afteraboveadjustmentsfinished.
Lag Exact Ahead

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4. HDTVColorAdjustmentProcedure
Equipment:
Patterngenerator(VG-828)
Lux meter(CL-100)
Procedure:
Offset adjustment:
1.Black coordinatespec:
OsramlampOshiolamp
x0 0.281 0.010.313 0.01
y0 0.311 0.010.329 0.01
2.The varianceof colorcoordinateviaPboffset and Proffset:
xy
Pboffset x y
Pboffset x y
Proffset x y
Proffset x y
If weline the xand y,thenthe Pboffsetistheshift action and theProffsetisthe
rotationalaction.
1.Connect power, YPbPrVideo intoprojector.
2.Change Timing andpatternof patterngenerator:
3.Timing : 480P(H:31.54KHz,V:60.08 Hz)
4.pattern: black
5.Light on projector
6.Set userOSDvaluestodefault.
7.Enterfactorymode.
8.Set Factoryvaluestodefault.
9.Followthe PbProffset adjustment flowchart:

20
JT50/52
1.DMDBiasVoltageAlignment
Equipment:
-None
Procedure:
11.WatchDMDchipLabel(Example: 94770000234B)
12.Switchthe DIPswitchonDMDboardaccordingtothe red characteronthe
DMDchip
3.00: B
01: C
10: D
11: E
2.ColorWheel DelayAlignment
Equipment:
-BatteryBiased SiliconPINDetector
-Oscilloscope
-Probe
00