background image

 

 

8

 

U DL          0 ~ 3 

?  

U signal delay adjust 

V DL           0 ~ 3 

?  

V signal delay adjust 

LCNR         0 ~ 63 

32 

?  

Down pillow shape distortion 

 

P11

   

   

Items

 

Preset

 

Remark

 

Description

 

C TRAP            0 ~ 3  2 

?  

Colour trap wave adjust 

H VCO          0 ~ 7 

?  

Row frequency adjust 

SIF BFP           0 ~ 3 

?  

SIFstrap pass width choice 

SIF45 G DN        0 ~ 1 

?  

4.5Mhz sound plus attenuation switch

  0 = normal

 1 = 

attenuation

 

STRAP OFF       0 ~ 1 

?  

Sound trap wave switch 

AFC1 UP 1        0 ~ 1 

?  

Level   AFC1 plus adjust   

AFC1 UP 2         0 ~ 1 

?  

Level  AFC1 plus adjus 

AFC2 DOWN      0 ~ 1  0 

?  

Level  AFC2 plus adjus 

AFC2 UP        0 ~ 1 

?  

Level  AFC2 plus adjus 

.

 

 
5. ICs functional description 

 
1.  IC201    R2J10165GC   

 

 

 

SYMBOL 

PIN 

DESCRIPTION 

SP00/14bPWM 

SP00/14bPWM 

SP01/PWM 

SP01/PWM 

SP02/PWM 

SP02/PWM 

SP03/PWM 

SP03/PWM 

TEST0 

TEST0 

P04/AD2 

P04/AD2 

P05/AD1 

P05/AD1 

P06/TIM31 

P06/TIM31 

AFT(AD0) 

SIF auto phase control 

 

DEF VCC(8.0V) 

10 

8V POWER 

V RAMP(+) 

11 

V RAMP(+) 

VRAMP CAP 

12 

VRAMP CAP 

AFC 1 FIL 

13 

SIF auto phase control filter

 

DEF VCC(5.0V) 

14 

5V POWER 

H OUT 

15 

Horizontal SIGNAL OUT 

FBP IN 

16 

FBP IN 

DEF GND 

17 

GND 

VRAMP AGC 

18 

VRAMP AGC 

Cb IN YcbCr 

19 

Cb IN YcbCr 

Cr IN YcbCr 

20 

Cr IN YcbCr 

C-APC 

21 

C-APC 

XTAL 

22 

XTAL 

CHROMA GND 

23 

CHROMA GND 

Y SW OUT 

24 

Y SW OUT 

TEST/EW OUT 

25 

TEST/EW OUT 

MCU 5.7 VDD OUT 

26 

MCU 5.7 VDD OUT 

PAL ID FIL 

27 

PAL ID FIL 

8.7V REG OUT 

28 

8.7V POWER OUT 

EXT AU(L)IN/EXT AU2 
IN 

29 

EXT AU(L)IN/EXT AU2 IN 

EXT2 IN/C IN YC 

30 

EXT2 IN/C IN YC 

CHROMA VCC(5.0) 

31 

CHROMA VCC(5.0) 

EXT 1 IN/YIN YC/YIN Y 
CbCr 

32 

EXT 1 IN/YIN YC/YIN Y CbCr 

5.7V REG OUT 

33 

5.7V POWER OUT 

VIF VIDEO OUT 

34 

VIF VIDEO OUT 

VIF GND 

35 

GND 

Summary of Contents for DTA2181

Page 1: ...20 l FEATURES l DVD TV 20 COMBO l AUTO TUNE 181 CHANNES l DVD VCD SVCD CD CD R CD RW JPEG MP3 COMPATIBLE l FORMATO DE VIDEO 4 3PS 4 3LB l DOLBY AC 3 DECODE l PANATAL LOCK l ATSC TUNER CAUTION READ THIS MANUAL CAREFULLY TO DIAGNOSE TROUBLE CORRECTLY BEFORE OFFERING SERVICE ...

Page 2: ... precautions 3 2 TV block diagram 4 3 Replacement of memory IC 5 4 Service adjustment 5 5 ICs functional description 8 6 Test point waveform 10 7 All ICs voltages 11 8 Purity convergence adjustment 12 9 DVD maintenance 14 ...

Page 3: ...not check high voltage by drawing an arc Use a high voltage meter or a high voltage probe with a VTVM Discharge the picture tube before attempting meter connection by connecting a clip lead to the ground frame and connecting the other end of the lead through a 10kO 2W resistor to the anode button 8 When service is required observe the original lead dress Extra precaution should be given to assure ...

Page 4: ... 4 2 Block diagram R2J10165GC series with stereo intercarrier sound demodulator ...

Page 5: ...d press VOLUME VOLUME key to make data adjustment of corresponding factory menus Press EXIT key to exit factory mode Focus adjustment 1 Receive a crosshatch signal 2 While watching the screen adjust the FOCUS VR on the FBT to make the vertical and horizontal lines as fine and sharp as possible Geometrical adjustment Receive NTSC standard complete pattern signal Adjustment steps a Adjust V SC S eme...

Page 6: ...0 IN YUV Black level offset R GB YUV 128 128 0 IN YUV Black level offset G BB YUV 128 128 0 IN YUV Black level offset B RD YUV 128 128 0 IN YUV White point R BD YUV 128 128 0 IN YUV White point B CR PEDDOT 0 15 8 CR benchmark voltage adjust CB PEDDOT 0 15 8 CB benchmark voltage adjust CRCB PED ON 0 1 1 YUV benchmark voltage switch CRCB GAIN UP 0 1 0 YUV benchmark voltage plus P4 Items Preset Remar...

Page 7: ...mory 3 else C_10164 5 070119 ATV software edition P8 Items Preset Remark Description AUTO N PM PN 0 1 1 AUTO N PM PN function choice AUTO N N4 P 0 1 0 AUTO N PM PN function choice PAL 0 1 0 PAL 0 N 1 Y NTSC 0 1 1 NTSC ON Y OFF N N443 0 1 1 NTSC4 43 ON Y OFF N P358 0 1 0 3 58PAL 0 N 1 Y PAL M 0 1 0 PAL M ON Y OFF N PAL N 0 1 0 PAL N ON Y OFF N P9 Items Preset Remark Description AV2 0 1 1 AV2 1 Y 0 ...

Page 8: ...3 SP02 PWM SP03 PWM 4 SP03 PWM TEST0 5 TEST0 P04 AD2 6 P04 AD2 P05 AD1 7 P05 AD1 P06 TIM31 8 P06 TIM31 AFT AD0 9 SIF auto phase control DEF VCC 8 0V 10 8V POWER V RAMP 11 V RAMP VRAMP CAP 12 VRAMP CAP AFC 1 FIL 13 SIF auto phase control filter DEF VCC 5 0V 14 5V POWER H OUT 15 Horizontal SIGNAL OUT FBP IN 16 FBP IN DEF GND 17 GND VRAMP AGC 18 VRAMP AGC Cb IN YcbCr 19 Cb IN YcbCr Cr IN YcbCr 20 Cr ...

Page 9: ... 8 7V 54 VREG VCC 8 7V MNITOR OUT 55 MNITOR OUT MCU RESET 56 MCU RESET P20 57 P20 P21 58 P21 P22 59 P22 HLF 60 HLF VHOLD 61 VHOLD CVIN 62 CVIN P26 AD6 63 P26 AD6 AD6 P27 64 AD6 P27 P35 TIM21 65 P35 TIM21 CNVSS 66 CNVSS TEST1 Note1 67 TEST1 Note1 TEST2 Note2 68 TEST2 Note2 VSS 69 VSS FILT 70 FILT VDD 71 VDD P36 72 P36 P17 INT3 AD4 73 P17 INT3 AD4 P16 INT2 AD3 74 P16 INT2 AD3 P15 INT1 75 P15 INT1 P1...

Page 10: ... 1 Inverting input Poutput stage supply 6 Output stage supply SUPPLY VOLTAGE 2 Supply voltage Input 7 Non inverting input Flyback generator 3 Flyback generator GND 4 Ground or negative supply Output 5 Output 5 U101 Tuner PIN Function PIN Function 1 Nc 7 5V 2 Tu 8 IFA1 3 Rf agc 9 IF AGC 4 SCL 10 IFD 1OUT 5 SDA 11 IFD 2 OUT 6 Btl 6 Test point Waveforms 5Vpp 0 9Vpp 1 3Vpp H H 1Vpp V CRT KB CRT KG CRT...

Page 11: ... 68 2 86 0 2 74 0 17 1 47 1 47 2 53 3 09 5 3 3 3 45 2 4 3 43 3 15 3 43 PIN 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 V 2 47 8 03 2 57 2 49 2 59 8 87 0 42 4 9 4 94 4 95 3 82 1 96 0 33 2 9 4 95 4 94 PIN 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 V 4 95 0 0 16 4 95 0 1 76 4 95 4 95 4 94 4 83 0 03 4 95 3 52 3 7 3 58 3 73 STV9302A PIN 1 2 3 4 5 6 7 V 2 993 26 8 14 57 0 1 96 26 05 2 991 TFA98...

Page 12: ...o the centre of the screen Fig 3 8 Move the deflection yoke forward and fix the position of the deflection yoke so that the whole screen will become green 9 Insert the wedge to the top side of the deflection yoke so that it will not move 10 Input a crosshatch signal 11 Verify that the screen is horizontal 12 Input red and blue raster signals and make sure that purity is properly adjusted CRT WEDGE...

Page 13: ...t convergence DYNAMIC CONVERGENCE ADJUSTMENT 1 Move the deflection yoke up and down and overlap lines in the periphery Fig 2 2 Move the deflection yoke left to right and overlap the lines in the periphery Fig 3 3 Repeat 1 and 2 above and make the best convergence After adjustment fix the wedge at the original position Fasten the retainer screw of the deflection yoke Fix the 6 magnets with glue FRO...

Page 14: ...onding pins of MT1389D to see if there is any short circuit break or faulty soldering 4 System in normal operation but the audio has no sound 1 Because the AUDIO DAC is built in MTK1389D IC you need to check the lower passing amplifying circuit and the MUTE circuit at the back of the LPF circuit Also check if there is any power supply to the LPF circuit 2 Check if the power supply voltage required...

Page 15: ...15 Sincere Forever ...

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