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Haier DX-RCRT20-09, Service Manual, Page: 16 / 27

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Haier DX-RCRT20-09 Service Manual Download Page 16

16 

6. Circuit Explanation 

1

、

Microprocessor and Small signal processing: super monolithic integrated circuits 

：

 

R2J10165GF 
R2J10165GF is an integrated circuit decoder, containing intermediate image 
amplifying, horizontal and vertical scan, small signal processing, color decoding, 
I

2

C bus control. 

Information introducing functions and testing data for maintenance is listed in 
Table 1.   

Table 1 

SYMBOL PIN 

DESCRIPTION 

Working 

Voltage (V) 

Ground 

Resistance (

Ω

) 

STANDBY 1 

STANDBY 4.88

（

ON/OFF

）

 

21.6K 

MUTE 2 

MUTE 1.90 

25.6K 

AV1/AV2(SW1) 3 

AV1/AV2 SWITCH 

4.86 

25.6K 

5V-C(DVD-C) 4 

5V 

CONTROL 0.03  25.6K 

GND 5 

GND 0 

0 

1.2V-C 

6 

DTV 1.2V CONTROL 

4.69/0.03

（

ATV/DTV

）

  25.6K 

DTV RESET 

7 

DTV RESET 

0.03 

2.8K 

SREQ 8 

SREQ 0.14 

2.57K 

AFT(AD0) 9 

SIF auto phase control 

 

4.87 154.4K 

DEF VCC(8.0V) 

10 

8V POWER 

8.06 

0.68K 

V RAMP(+) 

11 

V RAMP(+) 

2.95 

11K 

VRAMP CAP 

12 

VRAMP CAP 

2.35 

28M 

AFC 1 FIL 

13 

SIF auto phase control 
filter

 

3.12 69.5K 

DEF VCC(5.0V) 

14 

5V POWER 

4.97 

1.46K 

H OUT 

15 

Horizontal SIGNAL OUT 

0.83 

1.55K 

FBP IN 

16 

FBP IN 

1.10 

27K 

DEF GND 

17 

GND 

0 

0 

VRAMP AGC 

18 

VRAMP AGC 

2.15 

27M 

Cb IN YcbCr 

19 

Cb IN YcbCr 

1.18 

27M 

Cr IN YcbCr 

20 

Cr IN YcbCr 

1.17 

27M 

C-APC 21 

C-APC 2.96 

27M 

XTAL 22 

XTAL 3.22 

28M 

CHROMA GND 

23 

CHROMA GND 

0 

0 

Y SW OUT 

24 

Y SW OUT 

3.35 

3.38K 

TEST/EW OUT 

25 

TEST/EW OUT 

2.74 

19.3K 

MCU 5.7 VDD OUT 

26 

MCU 5.7 VDD OUT 

5.54 

46K 

PAL ID FIL 

27 

PAL ID FIL 

2.26 

27M 

8.7V REG OUT 

28 

8.7V POWER OUT 

8.71 

210K 

EXT AU(L)IN/EXT AU2 IN 

29 

EXT AU(L)IN/EXT AU2 IN 

3.28 

27M 

EXT2 IN/C IN YC 

30 

EXT2 IN/C IN YC 

1.96 

28M 

CHROMA VCC(5.0) 

31 

CHROMA VCC(5.0) 

0.17 

1.46K 

EXT 1 IN/YIN YC/YIN Y 

CbCr 

32 

EXT 1 IN/YIN YC/YIN Y 

CbCr 

0.23 27M 

Summary of Contents for DX-RCRT20-09

Page 1: ...DX RCRT20 09 1 2007 Haier Electronic Company Limited All rights reserved Unauthorized copying and distribution is a violation of law ...

Page 2: ...uct Products powered b electricity should be serviced or repaired only by experienced professional technicians Any attempt to service or repair the product deal with in this service information by anyone else could result in serious injury or death CONTENT 1 SPECIFICATIONS 3 2 WAINING 4 3 FEATURES AND TECHINICAL DESCRIPTION 11 4 Adjustment 11 5 WIRING CONNECTION DIAGRAM 14 6 Circuit Explanation 16...

Page 3: ...P 11 Treble bass boost 34 No picture listening 12 Left right balancer 35 Background light 13 NICAM 36 Sleep timer 14 Multi audio modes 37 Q view 15 Tone adjuster 38 SOFTWARE CCD 16 MTS SAP 39 NO of built in speakers 2 17 AUDIO Auto volume leveling 40 Audio output power W 2 2 18 AV input back 1 front1 41 Total power input W 70 19 AV output back 1 42 Voltage range V 90 250 20 DVD terminal back 1 43 ...

Page 4: ... damaged by accidental shorts of the circuitry that might be inadvertently introduced during the service operation If any fuse or Fusible Resistor in this TV receiver is blown replace it with a specified one When replacing a high wattage resistor Oxide Metal Film Resistor over 1W keep the resistor 10mm away from PCB Keep wires away from high voltage or high temperature parts Due to the high vacuum...

Page 5: ...n t going to be used for long time or it is in thunder and lightening please pull out the plug from AC outlet and the antenna plug from the cover of the TVset Explanation on the display tube Generally it is not needed to clean the tube surface However if necessary its surface can be cleaned with a dry cotton cloth after cutting off the power Don t use any cleanser If using hard cloth the tube surf...

Page 6: ...ontact with high voltage 4 Do not spray chemicals on or near this receiver or any of its assemblies 5 Unless specified otherwise in this service manual clean electrical contacts only by applying the following mixture to the contacts with a pipe cleaner cotton tipped stick or comparable nonabrasive applicator 10 by volume Acetone and 90 by volume isopropyl alcohol 90 99 strength CAUTION This is a f...

Page 7: ...ective package until immediately before you are ready to install it Most replacement ES devices are packaged with leads electrically shorted together by conductive foam aluminum foil or comparable conductive material 7 Immediately before removing the protective material from the leads of a replacement ES device touch the protective material to the chassis or circuit assembly into which the device ...

Page 8: ...e inserted and then bent flat against the circuit foil When holes are of slotted type the following technique should be used to remove and replace the IC When working with boards using the familiar round hole use the standard technique as outlined Removal Desolder and straighten each IC lead in one operation by gently prying up on the lead with the soldering iron tip as the solder melts Draw away ...

Page 9: ... shiny reheat them and if necessary apply additional solder Fuse and Conventional Resistor Removal Replacement 1 Clip each fuse or resistor lead at top of the circuit board hollow stake 2 Securely crimp the leads of replacement component around notch at stake top 3 Solder the connections CAUTION Maintain original spacing between the replaced component and adjacent components and the circuit board ...

Page 10: ...the pattern break and locate the nearest component that is directly connected to the affected copper pattern Connect insulated 20 gauge jumper wire from the lead of the nearest component on one side of the pattern break to the lead of the nearest component on the other side Carefully crimp and solder the connections CAUTION Be sure the insulated jumper wire is dressed so that it does not touch com...

Page 11: ...u Press CH CH to select items and press VOL VOL key to make data adjustment of corresponding factory menus Press EXIT key to exit factory mode B Maintenance menu Table 8 P1 Items Preset Remark Description H PHASE 0 31 14 Horizontal shift V SIZE 0 63 20 Vertical amplitude V POS 0 7 2 Vertical shift V LIN 0 63 29 Vertical slop V SC 0 63 32 S emendation PARABOLA 0 63 32 S correction TRAPEXIUM 0 63 32...

Page 12: ... VCO OK OK Picture IF adjust S TRAP OK OK Sound frequency adjust RF AGC 0 127 35 AGC adjust VIDEO LVL 0 7 4 Video demodulation output voltage control P5 Items Preset Remark Description OSD HP 0 63 35 OSD Horizontal vision position adjust OSD VP 0 31 21 OSD Vertical vision position adjust H TONE 0 1 0 Translucence ON OFF A OSD 0 1 0 A D OSDchoice 0 D OSD 1 A OSD OSD L 0 1 0 D OSD output voltage cho...

Page 13: ...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 N YUV 0 1 1 YUV 1 Y 0 N DVD 0 1 0 DVD 1 Y 0 N P10 Items Preset Remark Description Y DL 0 7 5 Brightness signal delay time adjust Y LPF 0 1 0 Brightness signal...

Page 14: ...equency adjust SIF BFP 0 3 0 SIFstrap pass width choice SIF45 G DN 0 1 0 4 5Mhz sound plus attenuation switch 0 normal 1 attenuation STRAP OFF 0 1 0 Sound trap wave switch AFC1 UP 1 0 1 1 Level AFC1 plus adjust AFC1 UP 2 0 1 1 Level AFC1 plus adjust AFC2 DOWN 0 1 0 Level AFC2 plus adjust AFC2 UP 0 1 1 Level AFC2 plus adjust You can change the DATA with mark when necessary 5 WIRING CONNECTION DIAGR...

Page 15: ......

Page 16: ...K AFT AD0 9 SIF auto phase control 4 87 154 4K DEF VCC 8 0V 10 8V POWER 8 06 0 68K V RAMP 11 V RAMP 2 95 11K VRAMP CAP 12 VRAMP CAP 2 35 28M AFC 1 FIL 13 SIF auto phase control filter 3 12 69 5K DEF VCC 5 0V 14 5V POWER 4 97 1 46K H OUT 15 Horizontal SIGNAL OUT 0 83 1 55K FBP IN 16 FBP IN 1 10 27K DEF GND 17 GND 0 0 VRAMP AGC 18 VRAMP AGC 2 15 27M Cb IN YcbCr 19 Cb IN YcbCr 1 18 27M Cr IN YcbCr 20...

Page 17: ... HI VCC 8 0 8 06 0 68K R OUT 51 R OUT 1 85 1 9K G OUT 52 G OUT 1 81 1 9K B OUT 53 B OUT 1 88 1 9K VREG VCC 8 7V 54 VREG VCC 8 7V 8 86 3 9M MNITOR OUT 55 MNITOR OUT 0 23 9 2K MCU RESET 56 MCU RESET 4 88 62K P20 57 P20 4 63 6 8K P21 58 P21 4 63 6 8K P22 59 P22 4 63 6 8K HLF 60 HLF 2 58 2 7M VHOLD 61 VHOLD 0 41 33M CVIN 62 CVIN 2 05 0 96M P26 AD6 63 P26 AD6 4 89 19 5K AD6 P27 64 AD6 P27 4 84 18 8K P3...

Page 18: ...4 6K Out 1 4 Output 1 7 59 4 72K PGND 5 Power ground 0 0 OUT2 6 Output 2 7 61 4 73K Vp 7 Supply voltage 15 67 15K M SS 8 Mute standby switch input 2 95 115K INV2 9 Non inverting input 2 2 14 27M 4 Analysis of vertical sync and vertical scan output circuits The field sync signals segregated from compound sync signals are used to activate the vertical frequency segregation system which commences whe...

Page 19: ...ifying circuits The video amplifying circuits are comprised of V501 V502 V503 and peripheral components R G and B signals output from IC201 51 52 and 53 3 video power transistor are available for amplifying the input R G B White balance adjustment is completed through IC602 under control of an I2 C serial bus control system 7 Maintenance Service and Trouble shooting A Principle integrated circuits...

Page 20: ...tal unit orN204 Check to see if ZD201 8v is normal Check the control voltage of Q207 or CPU power pin Check IC602 ect Normal Normal Normal Abnormal Checktosee110V 180V etc voltageisnormal T esttoseeallterminal Resistanceofload Checkswitch power unit Check to see if rectifying tube is normal Check the Loader Change rectifying diode Abnormal Normal Abnormal Normal Abnormal Normal Abnormal 20 ...

Page 21: ...Abnormal Normal Normal Abnormal Abnormal Normal Check the voltage of all pins of SK501 Heater Resistor open Check to see if be voltage of Q402 is existed Check the circuit from pin15 of IC201 to Q402 No raster Whether G2 voltage is normal Change wrong component or check peripheral circuit Check to see if 8V voltage is normal at PIN 10 or 14 of IC201 Check X201 IC201 and peripheral circuit of IC201...

Page 22: ...n2 at IC401 is normal Yes No Make R429 open Multimeter is at range RΧ1K Red probe connects to ground Touch No 5 of IC401 with black probe Bright line flashes for a moment Horizontal bright line 4 Snowy noise exist No sound and picture Not exist Exist Check to see if RAGC is at 00 mode Check to see if voltage output available at tuner Enter D MODE with customer remote controller Make RAGC tuned to ...

Page 23: ...ormal Inspect IC701 and peripheral components of IC701 23 6 Inspect C713 C714 Check to see if 16V exists Inspect IC201 and peripheral component of IC201 Inspect 16V power supply Yes No Yes No No noise Have noise Inspect Inspect the circuit from No 51 of IC201 to No 3 of SK501 Yes No Change V501 or weld V501 again Check to see if voltages of SK501 are normal Lack of red Check to see if V501 is open...

Page 24: ...ion of the antenna is changed The antenna may be disconnected or falling out Check ifthe direction of the antenna is changed The batteries in the remote control may be exhausted The batteries may be improperly installed Check if there are obstacles between the remote control and the remote infrared ray receiver Check if there is strong light interference around the remote infrared receiver Check i...

Page 25: ...000uF 16V CN702 C707 1uF 16V C704 4 7nF R704 22K R703 1 2K R707 5 6K R705 22K R706 10K D701 1N4148 C709 47uF 16V C701 2200uF 25V C710 4 7uF 16V C702 1uF 16V C703 1uF 16V R114 100 C122 0 47uF 16V C812 2 2uF 16V C233 0 47uF 50V R233 8 2K R431 4 7K R232 8 2K C227 0 47uF 16V C228 0 33uF M C934 1uF 16V C115 47uF 16V C933 47uF 16V C237 47uF 16V C932 47uF 16V R237 3 3K R623 470 C612 560pF C606 100 D203 1...

Page 26: ...R314 8 2K R308 8 2K C337 8200pF C338 68nF C339 68nF C330 68nF C329 68nF C328 8200pF C326 1uF 16V 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 IC302 R2S15900SP R306 100 R307 100 C314 1uF 16V C316 1uF 16V C315 10uF 16V C322 100nF C323 2 2uF 16V C321 100uF 16V C325 15nF C313 10uF 16V C319 2 2uF 16V C324 4 7uF 16V C320 4 7uF 16V X301 CSB503 R305 2 2K C309 4 7uF 16V C307 0...

Page 27: ...25 Sincere Forever ...

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