NOBLEX 29TC676F Service 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 transmission system and power source differ from the design specifications. Refer to the specification 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, C

B, CR Input (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-

Safety Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Chassis Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

IC Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

Service Adjustments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-17

Cabinet Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Chassis Electrical Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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, adjustment covers or shields, barriers, isolation resistorcapacitor networks etc.. Before returning any television to the customer, the service technician 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 constructed 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 hazardous 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-

-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)

+ 19 hidden pages