Trident IS-TVHD30 Service Manual

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COLOR TELEVISION

IS-TVHD30

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Summary of Contents for Trident IS-TVHD30

Page 1 COLOR TELEVISION IS-TVHD30...
Page 2: Table Of Contents
CONTENTS Safety precautions………………………………………………………………………..… Alignment instructions. ………………………………….………..…………………….… Working principle analysis of the unit……………………………….………….…………. Block diagram………………………………….. ……………………………………….………… IC block diagram………………………………………………………………………..…… Wiring diagram ……………………………………………………………..……………... Troubleshooting……………………………………………………………………………..…… Schematic diagram. ………………………………………………………………………..
Page 3: Safety Precautions
Attention: This service manual is only for service personnel to take reference with. Before servicing please read the following points carefully. Safety precautions After the original service problem has been corrected, a check should be made of the following: FIRE & SHOCK HAZARD 1.
Page 4 beam current should be within 35KV on condition that the main power(B+) voltage is DC140V. And it should not exceed 36KV in any condition. 1. Be sure procedures and instructions to all service personnel cover the subject of X-rays in current TV is the picture tube.
Page 5: Alignment Instructions
Alignment instructions 1. General instructions 1.1 The program data should be copied into the EEPROM (N802 M24C16) in this set according to Standard Sample program data, then execute “Factory Adjustment”. If adopt empty EEPROM, please preset I2C datum before any debugging. 1.2 If there is no special notice, the unit adjustment should be done on the following conditions: a.
Page 6 PROM copy High voltage check B+ voltage X-ray protection check OSD position Filament voltage AFT adjustment SELF CHECK AGC adjustment Picture parts Stereo check Focus Sub-brightness Screen-grid voltage and white balance adjustment White balance Centre of scanning amplitude and Colour purity and convergence raster adjustment Video/S-VHS/DVD Check...
Page 7 4. Adjustment methods 4.1 B+ voltage adjustment a. Be sure the voltage AC 120V/60Hz. b. Connect the digital voltmeter to TP3 and GND of B+ test point, input the US-7 signal, set the picture control to “standard”, adjust RP501 to let the B+(test point) voltage 140V+/-0.3V c.
Page 8 menu, adjust the V SIZE, until up and down over scanning of the picture to 8% of the all screen. 4.9 Raster correction and horizontal amplitude adjustment of TV Receive white grid of NTSC signal, the picture mode to “STANDARD” in the factory menu, select horizontal setting menu, adjust the PCC, until the raster distort least, adjust the H SIZE, until right and left over scanning of the picture to 8% of the all screen.
Page 9 In the factory menu, select Vertical setting menu, adjust the V POS, until the picture V-center and screen center accord. d. V-SCANNING adjustment In the factory menu, select Vertical setting menu, adjust the V SIZE, until up and down over scanning of the picture to 8% of the all screen.
Page 10 APPX: horizontal and vertical scanning adjustment diagram...
Page 12: Working Principle Analysis Of The Unit
The unit is digital frequency conversion processing of 16bit bus control color television, it adopt high integrity digital processing chip EX-11 of TRIDENT, this chip has a A/D conversion, decoder and scaler. The MCU is 16bit parallel processor M16C of RENESAS.
Page 13: Block Diagram
SOUND PROCESSING TUNER TA8256 LA7566 M61519 PICTUR SAWF Z102 AVOUT-V CVBS AV1(video)/Y Clamp N801 Blanking N700 PRE-VIDEO BOARD ND decodor, scaler AMP. LM2423 AV2(video) Trident STV9211 EX-11 H-AMP N302 2SC5422 N707 STV9118 V-AMP M16c/30620SPGP LA78041 EMST EMST 24C16 16161 16161...
Page 14: Ic Block Diagram
IC block diagram 1. LA7566 10: AFT output 19: SIF output 9: AGC output 1: TV audio output 5, 6: picture IF input 13: TV video output 8: sound IF input 3: 9V...
Page 15 2. EX-11 185: S-C input 187: Pb2 input 196: AV1-V/S-Y input 180: Pr2 input 197: AV2-V input 14: SCL 198: TV-V input 16: SDA 200: Y1(PbPr) input 190, 191: AVOUT-V output 186: Pb1 input 28: B output 179: Pr1 input 29: G output 202: Y2(PbPr) input 30: R output...
Page 16 3. M61519FP 39: AV2 audio-L input 7: AV1/Saudio-R input 4: AV2aduion-R input 35: AVOUT audio-L output 6, 37: TV audio input 8: AVOUT audio-R output 38: YPbPr1audio-L input 11: audio-L output 5: YPbPr1audio-R input 19: audio-R output 40: YPbPr2audio-L input 22: CLOCK 3: YPbPr2audio-R input 21: DATA...
Page 17 4. STV9118 2: V-SYNC input 24: pincushion correction output 1；V-SYNC input 25: X-ray protection input 18: Vertical high voltage compensation input 31: SDA 17:Horizontal high voltage compensation input 30: SCL 26: horizontal signal output 29: 12V 23: vertical signal output...
Page 18 5. STV9211 1: R input 1: ABL 3: G input 5: B input 13: SDA 16: G output 19: CLAMP 14: B output 20: BLANK 7, 17: 5V 18: R output 12: SCL...
Page 19 6. LA72700V 5: SIF input 25: R output 11: SDA 26: L output 12: SCL 31: 9V...
Page 20: Wiring Diagram
Wiring diagram...
Page 21: Troubleshooting
Trouble shooting 1. No raster, No picture and No sound Check the indicator Light No-light Check the supply Press the power button Check the FU501 power No signal Turn on Check if the pin10 of Check if the N802 is Check the D501 CPU has low-level normal...
Page 22 3. Sound, but without picture It has sound, but without picture Without raster Raster Check B+ Check if the digital processing board has Check the N700 RGB and H-V sync and peripheral output circuit Check Abnormal Check if the H-V pin26 of N302 circuit is normal has H-frequency...
Page 23: Schematic Diagram
Schematic diagram...
Page 26 A[0..7] VCC_3 R774 RN703 22x4 R770 RN701 RN702 I2C Address: 7E/7F 22x4 22x4 C770 C772 R781 5V-1_DPTV 68pF 68pF MPUCS0N VCC_3 Address: R711 0_DNS R782 7C/7D Option C783 Populated N700A 0.1uF 10K_DNS R732 MPUGPIO0 MPUGPIO0 MPUGPIO1 MPUGPIO1 R729 VDDM VDDR VSSR R731 VDDM...
Page 27 R702 10K_DNS VD3_3 V-sync C749 0.1uF C753 0.1uF CLAMP Option CVBS1_ Y_G2 H-sync G-DSUB R706 R759 R763 EX11/12 USE EX32 USE CVBS1_G Y_G2_G TV_G R704 10K_DNS R775 R773 C750 0.1uF C748 0.1uF 0/10K CVBS2_ PB_B2 VIDEO1 B-DSUB AGND Option When use EX12,use 0ohm; When use EX22,use 10Kohm.
Page 28 R709 VCC3_M R705 R703 CAS_ CAS# R701 RAS_ RAS# C723 R700 NKL_ C702 C700 C707 MA[0..10] 0.1uF 0.1uF 0.1uF 100uF/16V R707 CLKE_ CLKE N701 N702 VCC3_M KM416S1020B KM416S1020B VCC3_M MA10 MD23 MA10 MA10 MA10 MD22 MD21 C701 C709 C708 MD20 1000pF 1000pF MD19...
Page 29 3.3V POWER FOR SDRAM VCC3 3.3V_1 VA1_8 3.3V_2 L717 L716 N703 L714 L720 SS6117A-1.8 C736 C7A0 C739 C7A6 C7B1 C755 C757 0.1uF C7B5 22uF/16V 0.1uF 0.1uF 22uF/16V 22uF/16V 0.1uF 100uF/16V 3.3V POWER FOR SVP-EX VDDM VL1_8 N704 L721 SS6117A-1.8 C735 3.3V VD3_3 C737...
Page 30 X700 HEADER_24X2 X701 HEADER_17X2 LR-MUTE S-TRAP4 TV-Hsync SCL_CPU W-MUTE 3.3V_1 S-TRAP3 SDA-EEP SDA_CPU S-TRAP2 SCL-EEP 3.3V_2 S-TRAP1 PAGE-EEP 3.3V CNVSS ON-TIMER 3.3V_3 PAL/N RESET-CPU REMOTE TV_G VIDEO OUT_G TV_G VIDEO_OUT_G VIDEO_OUT 5V-1 5V-1 VIDEO1_G VIDEO1_G YC/VIDEO CLK1 Power VIDEO1 VIDEO1 C-YC CTX1/RTX1 FLASH...
Page 31 5V-1_CPU R785 V701 TP10 A[0..7] A[0..7] MMBT3904_DNS R786 N708 Power A D0 I/Q0 A D1 I/Q1 R787 A D2 I/Q2 A D3 I/Q3 1K_DNS A D4 I/Q4 5V-1_CPU Optional A D5 I/Q5 N706 A D6 I/Q6 A D7 C738 I/Q7 10uF/16V GND_CPU R784...
Page 32 603-TJ27680-01 603-TJ27780-01 603-TJ3060-01 Ver.1.0...