Noblex 29TC676F User manual

SERVICE MANUAL Colour Television
Product Code: 13007500
Original Version
Chassis Series: LB5-A
BB7A
FILE NO.
Model No. 29TC676F
Service Ref. No. 29TC676F-00
(Argentina)
Give complete “SERVICE REF. NO.” for
parts order or servicing. It is shown on the
rating plate at the cabinet back of the unit.
This T.V. receiver will not work properly in
foreign countries where the television trans-
mission system and power source differ from
the design specifications. Refer to the speci-
fication table.
Specifications
Power Source . . . . . . . . AC220V, 50Hz / 60Hz
Receiving System . . . . . PAL (M/M, N/N), NTSC (M/M)
Channel Coverage
Antenna mode VHF: CH02-CH13, UHF: CH14-CH69
CATV mode VHF band: CH01-CH13, Mid band: CH14-CH22
Super band: CH23-CH36, Hyper band: CH37-CH64
Ultra band: CH65-CH94 and CH100-CH125
Low mid band: CH95-CH99
Video IF . . . . . . . . . . . . . 45.75MHz
Aerial Input Impedance 75Ω
Input Terminals
AV1 (Video): Composite Video Input (Phone Jack) x 1
S-Video Input (Separated Y/C) DIN 4-pin Jack x 1
AV1 (Audio):L/R Stereo Input (Phone Jack) x 1 set
AV2 (Video):Composite Video Input (Phone Jack) x 1
AV2 (Audio):L/R Stereo Input (Phone Jack) x 1 set
AV3 (Video): Component Y, CB, CRInput (Phone Jack) x 1 set
AV3 (Audio): L/R Stereo Input (Phone Jack) x 1 set
Output Terminals
Video Monitor Output: Phono jack x 1
Audio Monitor Output: L/R Stereo Output (Phone Jack) x 1 set
Headphone Jack: Mini stereo jack x 1
Sound Output (RMS) . . . 5W + 5W
Speaker . . . . . . . . . . . . . . 6cm x 12cm x 2 pcs.
Dimensions . . . . . . . . . . . 758.5(W) x 594(H) x 486.5(D)mm
Weight . . . . . . . . . . . . . . . approx. 40 Kg
Specifications subject to change without notice.
NOBLEX

Contents
-2-
SafetyNotice ........................................................................... 2
ChassisBlockDiagram ................................................................... 3
ICBlockDiagrams..................................................................... 4-7
ServiceAdjustments................................................................... 8-17
CabinetPartsList....................................................................... 18
ChassisElectricalPartsList............................................................ 19-27
Safety Notice
SAFETY PRECAUTIONS
1: An isolation transformer should be connected in the
power line between the receiver and the AC line
when a service is performed on the primary of the
converter transformer of the set.
2: Comply with all caution and safety-related notes
provided on the cabinet back, inside the cabinet, on
the chassis or the picture tube.
3: When replacing a chassis in the cabinet, always
be certain that all the protective devices are
installed properly, such as, control knobs, adjust-
ment covers or shields, barriers, isolation resistor-
capacitor networks etc.. Before returning any
television to the customer, the service techni-
cian must be sure that it is completely safe
to operate without danger of electrical shock.
X-RADIATION PRECAUTION
The primary source of X-RADIATION in television receiver is the picture tube. The picture tube is specially con-
structed to limit X-RADIATION emissions. For continued X-RADIATION protection, the replacement tube must
be the same type as the original including suffix letter. Excessive high voltage may produce potentially hazard-
ous X - RADIATION. To avoid such hazards, the high voltage must be maintained within specified limit. Refer
to this service manual, high voltage adjustment for specific high voltage limit. If high voltage exceeds specified
limits, take necessary corrective action. Carefully follow the instructions for + B1 volt power supply adjustment,
and high voltage check to maintain the high voltage within the specified limits.
PRODUCT SAFETY NOTICE
Product safety should be considered when a component replacement is made in any area of a receiver.
Components indicated by mark in the parts list and the schematic diagram designate components in which
safety can be of special significance. It is particularly recommended that only parts designated on the parts list
in this manual be used for component replacement designated by mark . No deviations from resistance
wattage or voltage ratings may be made for replacement items designated by mark .

Chassis Block Diagrams
-3-
SIGNAL PROCESSING CIRCUIT

IC Block Diagrams
-4-
IC601 POWER SUPPLY IC (QTN6Q04-E)

IC Block Diagrams
-5-
IC201 < IF/Video/Chroma/Def./CPU > LA76933

-6-
IC Block Diagrams
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-7-
IC Block Diagrams
IC3401 <MTS> CXA2234QP

VOLUME +
VOLUME -
CHANNEL UP
CHANNEL DOWN
S1.00110111 S2.01111000
ADDRESS DATA
02 H-PHA 16
Item No. Item Data value
General
This set has an On-screen Service Menu system included in the CPU that allows remote operation for most of the
service adjustments.
2. Service Adjustments:
Press the CHANNEL UP/DOWN button on the remote
control handset to select the desired service menu
item you want to adjust.
Use the VOLUME + / - button to adjust the data. The
+ or - button will increase or decrease the data
sequentially.
3. Exit from the Service Menu
Press the MENU button to turn off the Service Menu
display.
The data which is set in the service mode is stored
into the memory IC automatically.
[ Service Mode Display ]
Service Adjustment-1
1. Enter the Service Menu
While pressing the MENU button on the television, press the Number Key 2 on the remote control unit.
The Service Menu now appear.
IC802 (EEPROM) Replacement
When IC802 (EEPROM) is replaced, IC201 (CPU) will automatically write the initial reference data into IC802 for basic TV operation.
However, the bus data should be checked and some bus data should be set up before attempting the service adjustments. (See
pages 9 ~ 11 for detailed information.)
Service Adjustments
-8-
MENU
D
E
MENU

-9-
Service Adjustments
On-screen Service Menu
Following table shows the initial values which have been stored in the CPU ROM, and items for the service adjustments.
When IC802 (EEPROM) is replaced, check the bus data to confirm they are the same as below. The shaded menu should be
checked and be set up or readjusted according to the procedures described in the following pages.
Initial Setup Data marked with an ∗should be changed from Initial Value Data.
No. Item Initial value Range Description
01 RFAGC 17 00~63 RF AGC adjustment
02 H-PHA 09 00~31 H-PHASE adjustment (50Hz)
03 V-DC 22 00~63 Vertical position adjustment (50Hz)
04 V-SIZ 83 00~127 Vertical size adjustment (50Hz)
05 V-SCO 18 00~31 Vertical-S compensation (50Hz)
06 V-LIN 16 00~31 Vertical linearity adjustment (50Hz)
07 H-P60 +4 -16 ~ +15 Difference value of H-PHASE adjustment (60Hz)
08 V-P60 0 -32~ +31 Difference value of V-POSITION adjustment (60Hz)
09 V-S60 0 -64~ +63 Difference value of V-SIZE adjustment (60Hz)
10 VSC60 0 -16~ +15 Difference value of Vertical-"S" compensation (60Hz)
11 VLI60 0 -16~ +15 Difference value of Vertical linear adjustment (60Hz)
12 H-PHAZ -1 -16~ +15 Difference value of H-PHAZ adjustment (ZOOM)
13 V-SZZ5 +33 -64~ +63 Difference value of V-SIZE adjustment (ZOOM 50Hz)
14 V-SCOZ +7 -16~ +15 Difference value of Vertical-"S" compensation (ZOOM)
15 V-LINZ +4 -16~ +15 Difference value of Vertical linear adjustment (ZOOM)
16 V-SIZZ6 +31 -64~ +63 Difference value of V-SIZE adjustment (ZOOM 60Hz)
17 OSDHP 38 01~255 OSD horizontal remark position
18 OSDC 05 00~07 OSD contrast
19 EWDC 44 00~ 63 EW DC(50Hz)
20 EWAMP 06 00~ 63 EW Amp(50Hz)
21 EWTL 11 00~ 63 EW Tilt(50Hz)
22 EWCTP 05 00~ 15 EW Corner Top(50Hz)
23 EWCBM 03 00~ 15 EW Corner Bottom(50Hz)
24 EWAMZ +6 -32~ +31 Difference value of EW Amp (ZOOM 50Hz)
25 EWDCN 0 -32~ +31 Difference value of EW DC (60Hz)
26 EWAMN 0 -32~ +31 Difference value of EW Amp (60Hz)
27 EWTLN -1 -32~ +31 Difference value of EW Tilt (60Hz)
28 EWCTPN +1 -8~ +7 Difference value of Corner Top (60Hz)
29 EWCBN -2 -8~ +7 Difference value of Corner Bottom (60Hz)
30 EWAMZN +5 -32~ +31 Difference value of EW Amp (ZOOM 60Hz)
31 EWCOR 00 0,1 EW COR SW
32 V-SCP 03 0~7 V-SIZE COMP
33 H-SCP 07 0~7 H-SIZE COMP
34 SBIAS 31 00~127 Sub Bias adjustment
35 RBIAS 02 00~255 Red Bias adjustment
36 GBIAS 06 00~255 Green Bias adjustment
37 BBIAS 04 00~255 Blue Bias adjustment
38 RDRIV 84 00~127 Red Drive adjustment
39 GDRIV 08 00~15 Green Drive adjustment
40 BDRIV 78 00~127 Blue Drive adjustment
41 -- -- -- White balance (a lateral line)
42 DRV -- -- Bright and Dark of White balance adjustment
43 B-YD 11 00~15 B-Y DC Level
44 R-YD 11 00~15 R-Y DC Level
45 B-YDN 0 -16~ +15 Difference value of NTSC B-Y DC Level
46 R-YDN 0 -16~ +15 Difference value of NTSC R-Y DC Level
47 B-YDD -4 -16~ +15 Difference value of DVD B-Y DC Level( 50Hz)
48 R-YDD -3 -16~ +15 Difference value of DVD R-Y DC Level( 50Hz)
49 B-YDD6 -4 -16~ +15 Difference value of DVD B-Y DC Level( 60Hz)
50 R-YDD6 -4 -16~ +15 Difference value of DVD R-Y DC Level( 60Hz)

-10-
Service Adjustments
No. Item Initial value Range Description
51 G-YA 00 00,01 G-Y Angle
52 RBGB 10 00~15 R-Y/B-Y Gain Balance
53 RBAG 08 00~15 R-Y/B-Y Angle
54 G-YAN 00 00~01 Difference value of NTSC G-Y Angle
55 RBGBN +7 -8~+7 Difference value of NTSC R-Y/B-Y Gain Balance
56 RBAGN +4 -8~+7 Difference value of NTSC R-Y/B-Y Angle
57 RBADP 0 -8~+7 Difference value of DVD PAL R/B Angle
58 RBDN -2 -8~+7 Difference value of DVD NTSC R/B Angle
59 RBBDP 0 -8~+7 Difference value of DVD NTSC R/B Balance
60 RBBDN 0 -8~+7 Difference value of DVD PAL R/B Balance
61 COGV 03 00~03 Coring Gain
62 BLKS 01 00~03 BLk. str. start(W/Defeat)
63 BLKG 00 00~03 BLk. STR. gain
64 BRTA 00 00~01 Brt.Abl.Deft
65 BRST 00 00~01 Mid. Stp.Def
66 BRTH 00 00~07 Bright. Abl. Threshold
67 WPL 00 00~03 WPL Ope.Point(W/Defeat)
68 YGAM 00 00~03 Y Gamma Start
69 PRES 02 00~03 AV Mode Pre shoot adj
70 OVERS 03 00~03 AV Mode Over shoot adj.
71 RFCO +1 -2~+1 Difference value of RF Coring Gain
72 PRESN 00 00~03 RF Mode Pre shoot adj
73 OVERSN 03 00~03 RF Mode Over shoot adj
74 TINT -8 -16~+15 Tint
75 SHRF +5 -16~+15 Difference value of RF sharpness
76 SHRFD 0 -16~+15 Difference value of DVD PAL sharpness
77 CODP -10 -16~+15 Difference value of DVD PAL Colour
78 CODN 0 -16~+15 Difference value of DVD NTSC Colour
79 RFCOL +5 -16~+15 Difference value of TV Color
80 TIDN -8 -16~+15 Difference value of DVD NTSC Tint
81 SHRFS 0 -16~+15 Difference value of S-video Sharpness
82 TISN 0 -16~+15 Difference value of S-video NTSC Tint
83 COSPN 0 -16~+15 Difference value of S-video COLOR PALN
84 COSPM 0 -16~+15 Difference value of S-video COLOR PALM
85 COSN -1 -16~+15 Difference value of S-video COLOR NTSC
86 ZOMCOL -6 -16~+15 Difference value of Colour(ZOOM)
87 ZOMCON -8 -16~+15 Difference value of Contrast(ZOOM)
88 ZOMBRI -6 -16~+15 Difference value of Brightness(ZOOM)
89 TEXC +3 -4~+3 OSD TEXT Contrast
90 AUFL 00 00~01 Auto. Flesh
91 COOP 07 00~07 Color Killer opt.
92 VCOFRQ 00 0~255 VCO Fre
93 DEEM 00 00~01 De-emphasis TC
94 V-LVL 06 00~07 Video Level
95 VER -- -- VERSION and DATA
96 STRAP 04 00~07 Trap Test
97 IFOM-S 00 00~01 OVER MOD. SW
98 IFMN-S 00 00~01 AUDIO MONITOR SW,MONITOR/FM
99 IFTRPS 00 00~01 IC built-in SIF TRAP ON/OFF
100 OVMLVL 08 00~15 Video level coarse adjustment & MOD.operating dot setting
101 VBSW 00 00~01 VBLK SW
102 FBTS 00 00~01 FBPBLK. SW
103 HBLKL 05 00~07 H-Blanking Control Left
104 HBLKR 03 00~07 H-Blanking Control Right
105 AFCRF 00 00~01 Adj. of AFC Gain & gate (RF)