Sanyo Vizzon HT27547 Скачать руководство пользователя страница 13 | Manualshive

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SERVICE HINTS

POWER FAILURE DETECTOR

This unit is equipped with a Power Failure Detector function
included in the CPU which checks for an abnormal condi-
tion in the chassis power supplies, including the power
supply derived from the Horizontal Output Transformer.

If, while the power is on, a failure is caused by any of the
following that results in a low voltage supply, the CPU will
turn the unit off in 1.5 seconds to prevent further damage:

•

Failure within the power supply circuits.

•

A short circuit in the load side from the supply.

•

Stoppage of the Horizontal Output Oscillator caused by

the X-Radiation protection Hold-Down Circuit.

If, while the power is off, the power is switched on and any
of these failures remains uncorrected, the CPU will shut off
the power within three seconds.

Check the following if the unit is turned off by the power
failure detector.

1. Disconnect the AC power cord (120V AC line) for at least

10 seconds.

2. Connect a DC Voltmeter to the circuits shown below.

3. Press the Power key and check for the proper voltage

supplies.

4. If any of these voltages is low, the power failure detec-

tor should turn the unit off within three seconds.

5. Check all circuits shown below.

Note: This unit is equipped with a Power Surge Protection

feature included in the CPU. If power failure occurs
three times within 15 minutes, the CPU will stop
functioning automatically to help prevent secondary
damage. (TV will not turn on by pressing the power
key.) To reset the operating programs within the CPU,
disconnect the AC power cord for at least 10 seconds.

30

IC801 (UOC)

Main

D509

TJ4

D429

D428

Q681

Q682

Q683

D659

29

Power ON/OFF

Power Fail

Video

D654

D643

D801

PIN11

K5DMB

P/F ACK

Hold

Down

Circuit

IC652

3.3VDM

Q641

14VTV

IC490

15VTV

VERT

VCC

DM

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Содержание Vizzon HT27547

Страница 1: ...otes 41 Waveforms 41 43 Pin Layouts 42 43 Capacitor and Resistor Codes 43 44 CRT Socket Board 45 46 Front Board 45 AV Switching Video Board 45 47 Main Board 46 48 Specifications Power Rating 120V 60Hz 85W Avg 2 5A Max Antenna Input Impedance 75Ω UHF VHF CATV Digital Receiving Channel 2 13 VHF 14 69 UHF 01 14 94 95 125 CATV 1 99 Digital Remote Ready 32 Key Remote Control Sound Output 1 0 W CH Inter...

Страница 2: ...al including the suffix letter in the part numbers Excessive high voltage may produce potentially hazardous X RADIATION To avoid such hazards the high voltage must be maintained within specific limits Refer to the X RADIATION WARN ING NOTE on the CHASSIS SCHEMATIC in this service manual for specific high voltage limits If the high voltage exceeds specified limits check the components specified on ...

Страница 3: ...ols used in the following service adjustments refer to the Channel Up and Down keys not the Menu keys SERVICE ADJUSTMENTS 3 IC802 EEPROM REPLACEMENT When IC802 EEPROM is replaced IC801 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...

Страница 4: ... with or key for 63 15 Select NO 8D HR OSD H Position with or key Adjust the data with or key for 1E 16 Select NO 8E SBO Sub Bright Offset with or key Adjust the data with or key for 05 17 Select NO 92 DCL YUV Color Difference with or key Adjust the data with or key for 00 18 Select NO 98 DRY YUV R Y Difference with or key Adjust the data with or key for FD 19 Select NO 99 DBY YUV B Y Difference w...

Страница 5: ...7 0 4A GB 00 00 00000000 Green Bias 7 0 4B BB 00 00 00000000 Blue Bias 7 0 4C RD 40 50 01000000 Red Drive 6 0 4D GD 08 0A 00001000 Green Drive 3 0 4E BD 40 50 01000000 Blue Drive 6 0 4F SBI 40 40 01000000 Sub Bias 6 0 50 Not Used 51 Not Used 52 OSD 03 03 00000011 On Screen Display Contrast 1 0 53 ABL5MSD4RTS3BAT 1C 1C 00011100 ABL Defeat 5 MID Stop 4 RGB Temp 3 ABL Thresh 2 0 54 CRG 12 12 00010010...

Страница 6: ...00000 YUV Sub Contrast 6 0 91 DBR 00 00 00000000 YUV Sub Bright 6 0 92 DCL F8 00 00000000 YUV Sub Color 6 0 93 DTN 00 00 00000000 YUV Sub Tint 6 0 94 DSH 00 00 00000000 YUV Sub Sharpness 6 0 95 DCG 00 00 00000000 YUV Sub Coring 6 96 DVG 00 00 00000000 YUV Sub VM Gain 5 0 97 DHS 00 00 00000000 YUV Sub E W DC 5 0 98 DRY 00 FD 11111101 YUV R Y Offset 3 0 99 DBY 00 FD 11111101 YUV B Y Offset 7 4 9A DY...

Страница 7: ... West DC 5 0 BC 4DIGP3EWA 00 00 00000000 4 3 CRT DigitalPix3 East West AMP 5 0 BD 16RFP1VS 00 00 00000000 16 9 CRT RFPix1 V Size 6 0 BE 16RFP1VLN 00 00 00000000 16 9 CRT RFPix1 V Lin 4 0 BF 16RFP1HBL 00 00 00000000 16 9 CRT RFPix1 H BLK L 6 5 C0 16RFP1HBR 00 00 00000000 16 9 CRT RFPix1 H BLK R 6 5 C1 16RFP1VSC 00 00 00000000 16 9 CRT RFPix1 V SC 4 0 C2 16RFP1EWD 00 00 00000000 16 9 CRT RFPix1 East...

Страница 8: ...e 2 The Drive Level adjustment data will be written in the Service Menu No 4C RD and 4E BD automatically 1 2 3 4 5 6 7 9 8 RB RB BB BB N A GB N A GB N A FOR RED BIAS ADJUSTMENT FOR BLUE BIAS ADJUSTMENT FOR GREEN BIAS ADJUSTMENT Figure 2 Figure 3 1 2 3 4 5 6 7 9 8 RD RD BD BD N A N A N A N A N A FOR RED DRIVE ADJUSTMENT FOR BLUE DRIVE ADJUSTMENT Note 2 Red Green Blue Bias Adjustments in Service Men...

Страница 9: ... off the Service Menu display press the MENU key VERTICAL SIZE ADJUSTMENT 1 Tune receiver to an active analog channel 2 Check the vertical size of the picture If the vertical size is too large or small perform steps 3 6 3 Turn off the receiver and disconnect the AC power cord 4 While pressing the VOLUME key reconnect the AC power cord The Service Menu display will now appear 5 Select NO 42 VS Vert...

Страница 10: ...Set the picture controls to the Auto levels or Reset use MENU key and or key or RESET key 2 Turn off the receiver and disconnect the AC power cord 120V AC line 3 While pressing the Volume key reconnect the AC power cord The Service Menu display will now appear 4 Select NO 49 RB Red Bias NO 4A GB Green Bias and NO 4B BB Blue Bias with or key and set each data to 00 with or key 5 Select NO 4C RD Red...

Страница 11: ... its cause must be found and corrected 4 To obtain picture again remove the DC Supply and wait a few minutes Now turn on the receiver MULTI SOUND SECTION ADJUSTMENTS Note Multi Sound Section must be adjusted after A101 U V Tuner IC3401 MTS Decoder Digital Module or IC802 EEPROM is replaced INPUT LEVEL ADJUSTMENT 1 Connect a signal to the analog antenna terminal with audio of 1 KHZ 100 modulation 2...

Страница 12: ... best pincushion adjust ment 9 Press the MENU key to turn off the Service Menu dis play OSD ADJUSTMENT 1 Connect a color bar generator to the analog antenna terminal 2 Set the picture controls to the Auto level 3 Turn off the receiver and disconnect the AC power cord 120V AC line 4 While pressing the VOLUME key reconnect the AC power cord The Service Menu display will now appear 5 Select NO 8D HR ...

Страница 13: ...n three seconds Check the following if the unit is turned off by the power failure detector 1 Disconnect the AC power cord 120V AC line for at least 10 seconds 2 Connect a DC Voltmeter to the circuits shown below 3 Press the Power key and check for the proper voltage supplies 4 If any of these voltages is low the power failure detec tor should turn the unit off within three seconds 5 Check all cir...

Страница 14: ...replaced Discharge the picture tube to the coating before handling the tube 1 Remove chassis referring to Chassis Removal instruc tions 2 Place cabinet s front face down on a soft surface 3 Remove the screw on each corner of the picture tube and GENTLY lift the picture tube out of the cabinet 4 Install a replacement picture tube in reverse order Properly install the degaussing coil and picture tub...

Страница 15: ...he following boards Numbers 700 Series On the Picture Tube Socket Numbers 900 Series Out of Board Numbers 1100 and 1900 Series On the Front Board All Other Numbers On the Main Board and Video Board PRODUCT SAFETY NOTICE PRODUCT SAFETY SHOULD BE CONSIDERED WHEN A REPLACEMENT IS MADE IN ANY AREA OF A RECEIVER COMPONENTS INDICATED BY A IN THIS PARTS LIST AND THE SCHEMATIC DIAGRAM DESIGNATE COMPONENTS...

Страница 16: ...0V C516 CEXLB1H4R7WAN ELECT 4 7U M 50V C601 CGXAV27224DCN MT POLYEST 0 22U M 275V C602 CGXAV27224DCN MT POLYEST 0 22U M 275V C606 CKXAV2E471ABW CERAMIC 470P M 250V CKXAV2E471BBW CERAMIC 470P M 250V C608 CK3A222KANHNN CERAMIC 2200P K 1K CK3A222KCRDNN CERAMIC 2200P K 1K CK3A222KCTBNN CERAMIC 2200P K 1K C609 CEXAV2D471DEN ELECT 470U M 200V CEXAV2D471EZN ELECT 470U M 200V C611 CK3A221KCRDNN CERAMIC 22...

Страница 17: ...S2076A DD1S2473 N DIODE 1S2473 D481 DDXLBB013 N DIODE ERA18 04 D482 DDXLBB013 N DIODE ERA18 04 D483 DDXLBB013 N DIODE ERA18 04 D486 DZMTZJ10B N ZENER DIODE MTZJ10B DZRD10EB2 N ZENER DIODE RD10EB2 D501 DDXLBB006 N DIODE EM01Z LYS DDXLBB012 N DIODE ERA15 02 D502 DZ1Z75 N ZENER DIODE 1Z75 D503 DZXLBZA36A N ZENER DIODE MTZJ36A D601 DDEM2B N DIODE EM2B DDXAAED0439 DIODE GP15G D602 DDEM2B N DIODE EM2B D...

Страница 18: ...621 ZZ0122 PIPE CORE 1LB4Z21B0080N CORE PIPE L623 ZZ0122 PIPE CORE 1LB4Z21B0080N CORE PIPE L624 ZZ0122 PIPE CORE 1LB4Z21B0080N CORE PIPE L625 ZZ0122 PIPE CORE 1LB4Z21B0080N CORE PIPE L628 ZZ0122 PIPE CORE 1LB4Z21B0080N CORE PIPE L653 1AV4L2MA330KN INDUCTOR 33U M 1AV4L2WK330MN INDUCTOR 33U M L901 1AV0L81B03500 ASSY COIL DEGAUSSING TRANSISTORS Q001 T2SC1740S Q N TR 2SC1740S Q T2SC1740S R N TR 2SC174...

Страница 19: ...815 Y T2SC536NFNPAN TR 2SC536NF NPA T2SC536NGNPAN TR 2SC536NG NPA T2SC945A PA N TR 2SC945A PA T2SC945A QA N TR 2SC945A QA T2SC945A RA N TR 2SC945A RA Q682 T2SC1740S Q N TR 2SC1740S Q T2SC1740S R N TR 2SC1740S R T2SC1740S S N TR 2SC1740S S T2SC1815 GR N TR 2SC1815 GR T2SC1815 O N TR 2SC1815 O T2SC1815 Y N TR 2SC1815 Y T2SC536NFNPAN TR 2SC536NF NPA T2SC536NGNPAN TR 2SC536NG NPA T2SC945A PA N TR 2SC9...

Страница 20: ...01JPAANN CARBON 4 7K JA 1 6W R504 RND1002FPAANN MT FILM 10K FA 1 6W R505 RDA1R50JPCANN CARBON 1 5 JA 1 2W R506 RDD8200JPAANN CARBON 820 JA 1 6W R507 RDA1R80JPCANN CARBON 1 8 JA 1 2W R508 RDD1202JPAANN CARBON 12K JA 1 6W R509 RDD1802JPAANN CARBON 18K JA 1 6W R511 RS21800JGDANN OXIDE MT 180 JA 2W R517 RDD1802JPAANN CARBON 18K JA 1 6W R518 RDD1802JPAANN CARBON 18K JA 1 6W R601 RWXAV71R0KEAL WIRE WOUN...

Страница 21: ... 10W R1227 RGF1002JTCANL MT GLAZE 10K JA 1 10W R1228 RDD1000JPAANN CARBON 100 JA 1 6W R1229 RDD1000JPAANN CARBON 100 JA 1 6W R1231 RDD3902JPAANN CARBON 39K JA 1 6W R1232 RDD1002JPAANN CARBON 10K JA 1 6W R1233 RDD1000JPAANN CARBON 100 JA 1 6W R3401 RDD2200JPAANN CARBON 220 JA 1 6W R3402 RDD2200JPAANN CARBON 220 JA 1 6W R3406 RGF1003JTCANL MT GLAZE 100K JA 1 10W R3407 RGF1004JTCANL MT GLAZE 1M JA 1 ...

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