Datasheet CT-25Q20RQ, CT25Q40VE, RT29FA33RT Service manual (LG)

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1. Safety Precautions
1. It is safe to adjust after using insulating transformer between the power supply line and chassis input to prevent the risk of electric shock and protect the instrument.
2. Never disconnect leads while the TV receiver is on.
3. Don't short any portion of circuits while power is on.
5. Unless otherwise noted, set the line voltage to 230Vac
!10%,
50Hz.
6. The adjustment of TVshould be performed after warming up for 15 minutes.
2. Test Equipment required
1. RF signal generator (with pattern generator)
2. DC Power Supply
3. Multimeter (volt meter)
4. Oscilloscope
5. Color analyzer
3.
DVCO
Adjustment
1) This is for adjustment of VCT38XX,crystal oscillator frequency after receiving a company Digital pattern.(PAL:EU05CH,NTSC:13CH)
2) When entering adjustment mode by pressing IN-START button,DVCO adjustment is operating automatically. (T/X doesn’t operating occassionally during DVCO adjustment.)
4. Focus Adjustment
4-1. Preparation for Adjustment
Tune the TV set to receive a digital pattern.
4-2. Adjustment Method
1) Single Focus CPT
Adjust the upper Focus volume of FBT for the best focus of horizontal line A,vertical line B.
2) Double Focus CPT
1) Adjust the lower Focus volume of FBT for the best focus of vertical line B.
2) Adjust the upper Focus volume of FBT for the best focus of area A.
3) Repeat above step 1) and 2) for the best overall focus.
5.
Screen Voltage & White Balance Adjustment
5-1. Adjustment of screen manually
(Using ADJ.Remote Control)
1) Receive the PAL or SECAM(NTSC) signal into RF mode regardless of channel.
2) If you press the “ADJ”button in LINE SVC mode(IN-START button),the LINE SVC mode changes to screen adjustment mode.
3) Turn the Sreen Volume of FBT to change luminance of White signal center as shown below.(Deviation ! 1FL)
4) Press the EXIT button (Like TV/AV) to exit SVC mode.
5-2.
Adjustment of white balance manually(LIne-SVC 1)
1) Tune the TV set to receive an 100% white pattern.
2) Adjust LOW LIght status of CUT R,CUT B at CUT G:50.
3) Adjust HIGH LIght status of WDR R,WDR B at WDR G:380.
4) Repeat above step 2) and 3) for the best condition each status of High Light and Low Light.
NOTE : When adjusting white balance automatically,connect the
adjustment JIG in SVC mode.(When pressing IN­START,MUTE button on remote control for adjustment orderly,it changes to SVC mode and screen displays SVC.)
Luminance(Manual)
6
!
1FL
8
!
1FL
5
!
1FL
6
!
1FL
8
!
1FL
CPT & INCH
29” FLAT
25” FLAT 29” NORMAL 25” NORMAL 28” NORMAL
Note
Single Focus
ADJUSTMENT INSTRUCTIONS
b
A
B
Fig. 1
Menu
X Y
Color Temperature
288 295
9000
o
K
268 273
13000
o
K
EU
N-EU
Menu
CUR R
CUR G
CUR B WDR R WDR G WDR B
0 ~ 511 0 ~ 511 0 ~ 511 0 ~ 511 0 ~ 511 0 ~ 511
50 50
50 380 380 380
Range
DATA
White Balance Color analyzer
White Balance Initial Data
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6.Deflection Data Adjustment (Line SVC-2)
NOTE : How to enter into the Line Service Mode with a remocon.
1.Power off.
2.Press the Red button.
3.Press the Green button.
4.Press the Yellow button.
5.Press the Cyan button.
6.Press the OK button.
7.Power On.
6-1. Preparation for Deflection Adjustment
1) At adjustment mode(IN-START button on remote control of adjustment),changed to LINE SVC 2 mode to adjust the deflection.
2) Press Channel UP/DOWN button for desirous function Adjustment.
3) Press Volume UP/DOWN button to adjust the data.
4) Tune the TV set to receive a Digital pattern.(PAL:05CH)
NOTE : If production line doesn’t the production line of LG
TV,receive available deflection adjustment pattern.
6-2. Adjustment Method
NOTE : First,adjust deflection at N50Hz,W50Hz,Z50Hz of PAL
signal.Then adjust deflection at N60Hz,W60Hz,Z60Hz of NTSC signal. In case of NTSC only model,adjust deflection of N60Hz,W60Hz,Z60Hz of NTSC signal.
Store the deflection adjustment data in EEPROM by using ENTER button before adjusting PIP position.
1) When adjusting a deflection,adjust N50Hz of PAL signal first and adjust a deflection at W50Hz,Z50Hz,N60Hz,W60Hz,Z60Hz of PAL signal.
2) Adjust a deflection as shown below PAL 4:3=> PAL 16:9=>PAL ZOOM=>NTSC 4:3=>NTSC 16:9=>NTSC ZOOM.
3) After finishing deflection adjustment,press the ENTER button to enter or exit in SVC mode.
VL (Vertical Linearity)
Adjust so that the boundary line between upper and lower half is in accord with geometric horizontal center of the CPT.
VA (Vertical Amplitude)
Adjust so that the circle of a digital circle pattern may be located within the effective screen of the CPT.
SC (Vertical “S” Correction)
Adjust so that all distance between each horizontal lines are to be the same.
VS (Vertical Shift)
Adjust so that the horizontal center line of a digital circle pattern is in accord with geometric horizontal center of the CPT.
HS (Horizontal Shift)
Adjust so that the vertical center line of a digital circle pattern is in accord with geometric vertical center of the CPT.
EW (Horizontal Width)
Adjust to that a digital circle pattern looks like exact circle.
EP (East-west Parabolar)
Adjust so that middle portion of the outermost left and right vertical line looks like parallel with vertical lines of the CPT.
EC (East-west Coner)
Adjust so that the vertical line at every 4 corners of the screen looks like parallel with the vertical lines of the CPT.
ET (East-west Trapezium)
Adjust to make the length of top horizontal line same with it of the bottom horizontal line.
PIP (PIP Position)
Adjust until the distance between PIP and main picture becomes about 1~2mm.
Fig. 2
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ITEM
RANGE
Z60Hz
W60Hz
N60HzZ50Hz
W50Hz
25” 29” 25” 29” 29” 29” 29”
29”
25” 25” 25” 25”
N50Hz
VA
VL SC VS HS
EW
ET EP ES EC
PIP P
008A 00F8 00E1 0733 001C 0C59 07F3 07BF 085F 073E 0009
-22 0 0 0 0 0 0
25 29
0 0
-22 0 0 0 0 0 0
25 29
0 0
14
0 0 0 0 0 0
-16 29
0 0
14
0 0 0 0 0 0
-16 29
0 0
0
-5 0
43
4
15
-6
-2 0
12
0
0
-5 0
43
4
15
-6
-2 0
12
0
-22
-5 0
43
4
15
-6
15 44 12
0
-22
-5 0
43
4
15
-6
15 44 12
0
-5 0 0
43
4
15
-16
-16 44 12
0
-5 0 0
43
4
15
-16
-16 44 12
0
0092 00FF 00E1 07FF
0016 0C36 07FC 07B3
0864 083F
0009
0050~00CF 0025~00BF
0000~009F 0600~0900
0000~003F 0400~0EFF 0700~08FF 06E0~0840 06A0~0AFF 0790~08E0 0790~08E0
25/29” FST CPT
ITEM
RANGE
Z50Hz
N50Hz
W50Hz
VA VL SC VS HS
EW
ET EP ES EC
PIP P
11
0 0 0 0 0 0
-14 0 0 0
-22 0 0 0 0 0 0
22
0 0 0
00A3 00F5 00D0 0744 0016 0E40 07E9 07B4 0840 0840
0000B
0050~00CF 0025~00BF 0000~009F
0600~0900 0000~003F 0400~0EFF 0700~08FF 06E0~0840 06A0~0AFF 0790~08E0 0790~08E0
ITEM
RANGE
Z50Hz
N50Hz
W50Hz
VA VL SC VS HS
EW
ET EP ES EC
PIP P
11
0 0 0 0 0 0
-14 0 0 0
22
3 0 0 0
22
0
19
0 0 0
009A 00F3 00D0 0774 0019
0B96 07DE 07BF 085C
082B
0007
0050~00CF 0025~00BF
0000~009F 0600~0900 0000~003F
0400~0EFF
0700~08FF 06E0~0840
06A0~0AFF
0790~08E0 0790~08E0
25/29” LG FLAT CPT(CT-25Q20RB) 29” S/S SEB FLAT CPT
ITEM
RANGE
50Hz 50Hz 50Hz 50Hz60Hz 60Hz 60Hz60Hz
16: 9 14: 9
ZOOM STANDARD
VA
VL SC VS HS
EW
ET EP
0083 00FA 00F0 0753 0014 0A62 07FD 07B6
0083 00FD 00F0
0729
0016 0A6E 07FF 07B7
008F
00FD
00F0 0732
0016 0A6E 07FF 07A9
00A7 00FD 00F0 073B 0016 0A6E 07FF 078E
0083
00FD
00F0 0741
0016 0A6E 07FD 07B3
0084 00F9 00F0 0753 0014 0A68
07EA
07B6
00A7 00F8 00F0 075D 0014 0A68 07EA 078B
008E
00A 00F0 0756 0014 0A68 07E8 07AB
0050~00CF 0025~00BF
0000~009F 0600~0900
0000~003F 0400~0EFF 0700~08FF 06E0~0840
28” LGPD FLAT CPT
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7.
SVC Data & PSM,SSM Data.
PICTURE SETTING DATA (LINE SVC-3)
Menu
DVCO(Digital VCO)
IBRM(BLACK CURRENT)
WDRM(WHITE CURRENT)
BCLT(BCL THERSHOLD
BCLTM(BCL TIME) BCLGA(BCL GAIN)
SVGA(SVM GAIN)
SVDEL(SVM DELAY)
SVD1(SVM DELAY1)
LDLY(L DELAY) DSCC(Discharge Sample) DSCV(Vertical Discharge)
0~1FFH 0~3FFH 0~7FFH 0~1FFH 0~1FFH
0~01FF 0~01FF
00C8
0190 0055 0007 0007
000D
0007 0003
FFFC
000D FB80
00C8
0190 0055 0007 0007
000D
0007
0003 FFFE 000D FB80
00C8 0190 0050 0007 0007 000D 0007 0003 FFFE 0009
FDC0
00C8
0190 0050 0007 0007
000D
0007 0003
FFFE
00C8
0190 0050 0007 0007
000D
0007 0003
FFFE
0007
FD80
00C8 0190 0050 0007 0007 000D 0007 0003
0008 FB80
Range
25/29” LG Flat
29” S/S-Flat 25” FST 28” FST
29” FST
28” FLAT
8.
OPTION Adjustment (OPTION-1,2, 3,Teletext)
8-1. Preparation for Adjustment
1) This decides funtion in accordance with model. Press the SVC TX adjustment button(IN-START button) at SVC mode,then adjust the option at OPTION 1,2,3,4 mode.
2) Mark the option adjustment data like [111,11,111,11] in BOM.
8-2. Adjustment Method
1) Input data directly by the buttons corresponded with OPTION1 ??(0~255), OPTION2 ??(0~255), OPTION3 ???(0~127),OPTION 4 ???(0 ~255).
2) Select each OPTION function by the CH Up/Down button and then set up each OPTION by the VOL Up/Down button.
[113,63,112,128]
OPTION 1 OPTION 2 OPTION 3 OPTION 4
D D D D
O Mark of BOM
LEVEL PART NO. SPECIFICATION DESCRIPTION JOB EXP.
1. 3141VMN382A MAIN[MC-022A] CHASSIS ASSY OP[113,63,112,128]
The OPTION 1 data is 113,OPTION 2 data is 63,the oOPTION 3 data is 112,the OPTION 4 data is 128 in this model.
ITEM
RANGE
50Hz 50Hz 50Hz 50Hz60Hz 60Hz 60Hz60Hz
16: 9 14: 9
ZOOM STANDARD
VA
VL
0083 00FA
0083
00FD
008F
00FD
00A7 00FD
0083
00FD
0084 00F9
00A7 00F8
008E
00A
0050~00CF 0025~00BF
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8-3. OPTION 1 Function
8-4. OPTION 2 Function
Only Austrailia
EYE
DEG
TILT
KEY
CH+AU
ACMS
TOP
WIDE
Option Code
0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
Function Remark
4:3 NORMAL MODEL WIDE FLAT MODEL W/O TOP(FLOP BASIC) WITH TOP Without ACMS funtion With ACMS funtion ALL NATION Frequency Table WITHOUT EYE WITH EYE Without DEGAUSSING With DEGAUSSING WITHOUT TILT WITH TILT 6 KEY 4KEY(H80,K90,K30)
EU
MONO MODEL
DEFAULT
EU(CE,CL Model) NON EU(CT Model)
SCART
V-CUR
DVD
DUAL
A2 ST
HOTEL
M-VOL
With HOTEL mode
C MUTE
TURBO
Option Code
0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
0
~
100
Function Remark
Without TURBO search With TURBO search
Not CARRIER MUTE
CARRIER MUTE NICAM NICAM & FM STEREO NO SAVE DUAL/SOUND Condition SAVE DUAL SOUND Condition PHONE JACK SCART JACK NORMAL VOLUME CURVE RUSHED VOLUME CURVE Without DVD INPUT With DVD INPUT Without HOTEL OPTION With HOTEL OPTION MAX VOLUME
TXT Model W/O TXT Model
1 PIP or W/O PIP 2 PIP CE/RE-MODEL CL/RL-MODEL CT/RT-MODEL
1 TUNER Model 2 PIP only
1 TUNER Model 2 PIP only
PAL model ALL
PIP
SYS
TBS
WOOF
AV2
MONO
GAME
Option Code
0 1 0 1 0 1 0 1 0 1 0 1 0 1 2 3
Function
Remark
W/O GAME GAME PACK GAME(HINDI MICOM) FORCED MONO NOT SETTING FORCED MONO SETTING WITH 1 AV JACK(BACK) WITH 2 AV JACK(BACK) BOOSTER CONTROL disable BOOSTER CONTROL enable W/O WOOFER WITH WOOFER 1 TUNER PIP or W/O PIP 2 TUNER PIP B/G,I,D/K B/G,I,D/K,L/L’ B/G,I,D/K,M RESERVED
8-5. OPTION 3 Function
Menu
FP(FM PRE-SCALER) NP(NICAM PRE-SCALER) SP(SCART PRE-SCALER)
S1 VOL(SCART1 PRE-SCALER) S2 VOL(SCART2 PRE-SCALER)
AGC-L(AUTO GAIN CONT.LIMIT)
0016 0056 0013 0064 0064
00C5
DATA
8-6. SOUND PRE-SCALER
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CODE
0 1 2 3 0 1 2 0 1 2 3 4 5 0 1 2 0 1 2 3 0 1 2 3 4 5 0 1 0 1 2 3 0 1 2 3 0
FUNTION English Only(Eng.) Arab(Eng/Fr/Arab) Urdu(Eng/Fr/Arab/Urdu) Asia(Eng/Fr/Indonesia) English Only(Eng.) Arab(Eng/Fr/Arab) Farsi(Eng/Fr/Arab/Farsi) English Only(Eng.) Arab(Eng/Fr/Arab) Urdu(Eng/Fr/Arab/Urdu) Arab all(Eng/Fr/Arab/Urdu/Farsi) Farsi ONly(Eng/Farsi) Asia(Eng/Fr/Indonesia/Malay) English Only(Eng.) EU-7(E.Ger/Fr/Ita/Spain/Holand/Port) EU-NORTH(E-Ger/Fr/Holand/Swe/Nor/Den/Fin) English Only(Eng.) Cyrilic(E.Russia) EU-EAST(E.Ger/Rum/Pin/Hung/Chez) EU-EAST All(E-Ger/Rum/Pol/Hung/Chez/Russia) English Only(Eng.) EU-7(E.Ger/Fr/Ita/Spain/Holand/Port) EU-NORTH(E-Ger/Fr/Holand/Swe/Nor/Den/Fin) Cyrilic(E.Russia) EU-EAST(E.Ger/Rum/Pin/Hung/Chez) EU-EAST All(E-Ger/Rum/Pol/Hung/Chez/Russia) English Only(Eng.) EU-5(E.Ger/Fr/Ita/Spain) English Only(Eng.) Vietnam(E.Vietnam) Hindi(E.Hindi) China(E.China) Eng/Spain/Port Spain/Port/Eng Port/Spain/Eng Eng/Fr KOrean Only
Arab.Asia 3834
Farsi 3834
Arab-Asia 3804
WEST-EU 3834 Only(W/TXT)
EAST-EU 3834 Only(W/TXT)
EU-ALL 3804 Only(W/O TXT)
28” Wide Flat 3834 Only(W/TXT) Hindi-China-Viet. 3804 Only(W/O TXT)
Korea Version
OPTION
OSD
LANG.
8-7. OPTION 4 Function
Page 7
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CODE
0 1 2 3 5 8 0 1 2 3 5 0 1 2 6 0 1 2 6 0 1 2 4 5 6
FUNTION WEST-EU EAST-EU Turkey Cyrillic3 Arab/English Farsi/English WEST-EU EAST-EU Turkey Cyrillic3 Arab/English WEST-EU EAST-EU Turkey Cyrillic3 WEST-EU EAST-EU Turkey Cyrillic3 WEST-EU EAST-EU Turkey Cyrillic3 Arab/English Farsi/English
Farsi only 3834 only(W/TXT)
Arab-Asia 3834 only(W/TXT)
WEST EU 3834 only(W/TXT)
EAST EU 3834 only(W/TXT)
28” WIDE FLAT 3834 only(W/TXT)
OPTION
TXT-L
Page 8
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11
110V(Flat)
120V
(Normal)
12V
12
33V
14
16
18
17V
Sound Vcc
(35V OPT.)
8V
278R05
LD3.3V
KA78A09
78L05
TDA-7297
Sound AMP
H-DRIVE
FBT
PRE-AMP
EEPROM
LED
TDA6109
MSP-34XX
(Sound Processor)
7805
Tuner
(Main)
VCT3834
LD3.3V
TDA- 2006
(Mono Opt.)
SDA-9489X
(PIP Processor)
CXA-2040AQ
(Video Switch)
EYE(Opt.)
Tilt(Opt.)
STK396-110
(VM IC)
12V
SMPS
TRANS
ST-BY
TRANS
ST 5V
12V
9V
5V
PIP &
AV SW
(OPT.)
7805
LD3.3V
5V
Tuner
(Sub)
Relay
VM
200V(FBT)
LA 7845(V-AMP)
¡ 14V(FBT)
EW AMP
28V(FBT)
T803
T802
IC01
IC661
IC602
ICP01
ICP101
IC901
HIC920
Page 9
TROUBLE SHOOTING
- 18 -
RF- STEREO
Selected correct system In menu
Check the waveform
At pin 17 of TU101
Check the waveform At pin 24,25 of IC661
Check the waveform At pin 4,12 of IC602
Check the Voltage
At pin 6, 7 of IC602
Check the waveform
At pin 1, 2, 14, 15 of IC602
Check the Voltage
At pin 3,13 of IC602
NO
Check / Replace
TU 101
NO
NO
NO
NO
Check The Voltage
At pin 16,33,46, of IC661
Check / Replace
Q671, 672
Check / Replace
Q621, IC603
Check / Replace F851, D862
Check / Replace IC610, IC853
Check The voltage At pin of IC610, IC853
NO
OK
OK
OK
OK
OK
OK
NO
No Raster / Sound OK
Check the Heater voltage of CPT (6 ~ 6.5Vrms)
Check HV, Screen Voltage of CPT
Check IK Current of IC01, pin37,39,40
Check the Heater pulse of FBT T402
Check / Replace CPT Board Components
Check FR901, P402A P402B, P302
Check FBT T402
Check FBT T402
Check IC01, Q901, IC901 P03A, P03B, P541
OK
OK
OK NO
NO
NONO
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NO RASTER
CHECK B+ At D807 cathode
Is the voltage at Pin 25, 54 of IC01 3.3V?
Check Fuse of AC line
Check / Replace Fuse , DB801
Check the Voltage Of C804
Check the Voltage Pin 3 of IC801
Check / Replace IC801, IC803, IC802
Check / Replace Fuse DB801
Check pin 24 Of IC01(H - Out)
Check Q402 Collector waveform
Check T401 & each pin voltage
Check & Replace T402
Is the voltage at pin3,15,45 IC02 5V?
Check the In/out of IC855,IC851
Check the In/out of IC06, IC07
Check IC01 Pin1 high?
Check / Replace
IC01
Check & Replace IC01
Check & Replace Q402
Check & Replace T401
Check & Replace IC01, IC03
Check the Voltage at D860 or D858 cathode
Check & Replace F853 ,F855
Normal
Abnormal
Ok
254~380 V
Open
0V
No
No
Yes
No
No
No
Yes
Yes
Yes
Yes
No
No
No No
Yes
Page 11
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No Picture / No Sound
Is any OSD displayed?
Check receiving system in MENU & execute Auto - Program.
Does the auto - Program Operate properly.
Store on manual - program MENU
Check 5V, 33V & IIC Bus Line Of Tuner.
Is the CVBS signal OK. (IC01 pin10 or 22)
Check R,G,B signal At IC01, pin42,43,44
Check / Replace CPT Board component
Go to No Sound / Picture OK
Check IC01 pin37,42,43,44 (IK, R,G,B)
Check / Replace IC01
Check 5V, 33V & IIC Bus Line
Check / Replace IC01, Tuner
Check CVBS signal Line & IC01
Check IK Signal at IC01 pin37 (similar to CBVS)
No
No
No
No
No
OK
OK
OK
OK
OK
OK
OK
OK
Page 12
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AV Stereo
Select correct system In menu
Check the connection Of AV equipment
Check the the waveform At pin47 of IC661
Check TU101 Tuner
Check the waveform At pin 24, 25, of IC661
Check waveform At pin 4, 12 of IC602
Check the voltage At pin6,7 of IC602
Check the waveform At pin 1,2,14,15 of IC602
Check the voltage Of pin16,20
Check / Replace IC602
Check / Replace Q621, IC603
Check the vpltage At pin3, 13 of IC602
Replace IC 602
Check /Replace F851, D862
OK
AV
OK OK
OK
OK
OK
OK
NONO
NO
NO
NO
NO
OK
Page 13
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112
913
150
153
510
170
530
520
P801
501
540
550
310
600
700
120
300
320
330
400
943
560
EXPLODED VIEW
Page 14
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EXPLODED VIEW PARTS LIST
LOCA. NO PART NO DESCRIPTIONS
112 6341V29006D CPT ASSEMBLY A68QCP893X001 120 6400VA0033A SPEAKER,GENERAL F1562C-6229 8OHM 10/2 150 6140VC2005F COIL,DEGAUSSING 29 FLAT ASSY(W) SELLA 170 170-844K CPT EARTH 29” 98T 4LUG 300 3091V00324J CABINET ASSY 310 5020V00394B BUTTON 320 320-062E SPRING,KNOB 330 5020V00518B BUTTON W/O SPRAY . 400 3809V00242H BACK COVER ASSY(2-SCART) 501 3210V00083B FRAME,MAIN 510 6871VSMB26B PWB ASSY,CPT 022A (CPT/VM)CE 29” S/S 520 6871VMMC17A PWB ASSY,MAIN 540 6871VSMB27C PWB ASSY,CONT 550 6871VSMD01B PWB ASSY,POWER 022A Q40 RE(CE) MODEL 560 6871VSM842A PWB ASSY,CURRENT HARMONICS STANDARD 600 6871VSMB28L PWB ASSY,A/V 022A SIDE Q40(CE/RE) 700 0IGL120104A IC,CDS SENSOR MODULE(P1201-04) 913 332-229H SCREW ASSY HEXAGON HEAD 943 1PTF0403116 SCREW,TAP TITE(P) D4.0 L16.0 MSWR3/FZB P801 174-009V POWER CORD(W/HOLD,HOUSING)L=400,4.0
The components identified by mark is critical for safety. Replace only with part number specified.
Page 15
SVC. SHEET : 3854VA0098A-S
SVC. SHEET :
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