Hitachi 27CX01B Service Manual Download Page 14 | Manualshive

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Summary of Contents for 27CX01B

Page 1: ...V Channels 1 thru 125 EIA Channel Plan U S A PA No 0137 27CX01B R C CLU 341U SERVICE MANUAL CAUTION Before servicing this chassis it is important that the service technician read the Safety Precaution and Product Safety Notices in this service manual In the interests of user safety Required by safety regulations in some countries the set should be restored to its original condition and only parts ...

Page 2: ... meter should be checked periodically 3 High voltage should always be kept at the rated value no higher Operation at higher voltages may cause a failure of the picture tube or high voltage circuitry and also under certain conditions may produce radiation in exceeding of desirable levels 4 When the high voltage regulator is operating properly there is no possibility of an X radiation problem Every ...

Page 3: ...chanical insulators etc 3 To be sure that no shock hazard exists check for leakage current in the following manner Plug the AC cord directly into a 120 volt AC outlet Do not use an isolation transformer for this test Using two clip leads connect a 1 5k ohm 10 watt resistor paralleled by a 0 15µF capacitor in series with all exposed metal cabinet parts and a known earth ground such as electrical co...

Page 4: ...image qu en porant des lunettes incassables et qu après avoir déchargé totalement la haute tension LIMITES DES RADIATIONS X ET DE LA HAUTE TENSION 1 Tout le personnel réparateur doit être instruit des instructions et procédés relatifs aux radiations X Le tube image seule source de rayons X dons les téleviseurs transistorisés n émet pourtant pas de rayons mesurables si la haute tension est maintenu...

Page 5: ...rs mécaniques etc 3 S assurer qu il n y ait pas de danger d électrocution en vérifiant la fuite de courant de la facon suivante Brancher le cordon d alimentation directem ent à une prise de courant de 120V Ne pas utiliser de transformateur d isolation pour cet essai A l aide de deux fils à pinces brancher une résistance de 1 5 kΩ 10 watts en parallèle avec un condensateur de 0 15µF en série avec t...

Page 6: ...ed The degree of illumination will decrease with time and depending on the temperature The time needed to charge the phosphorescent display will vary depending on the surrounding lighting Sunlight and fluorescent lighting are the most effective when charging the display NOTE POWER Press On Press again Off REMOTE KEYPAD Accesses any channel from keypad LAST CHANNEL Returns to previous channel FAMIL...

Page 7: ...of the horizontal oscillator does not stop in step 5 the circuit must be repaired before the set is returned to the customer HIGH VOLTAGE CHECK High voltage is not adjustable but must be checked to verify that the receiver is operating within safe and efficient design limitations as specified Checks should be as follows 1 Connect an accurate high voltage meter between ground and anode of picture t...

Page 8: ...de Use the reset function in the video adjustment menu to ensure customer controls are in their proper reset position 2 Service number selection Once in the service mode press the Ch up or Ch down button on the remote controller or at the set The service adjustment number will vary in increments of one from S01 to M05 Select the item you wish to adjust 3 Data number selection Press the Vol up or d...

Page 9: ... 00 03 Must be set to 00 S23 TUNER SETUP 00 00 01 Must be set to 00 OP1 OPTION1 Set to each mode 00 00 FF B3 OP2 OPTION2 00 00 FF A7 M01 INPUT LEVEL 0A 00 0F M02 ST VCO 20 00 3F M03 FILTER 1C 00 3F M04 WIDE BAND 20 00 3F M05 SPECTRAL 1B 00 3F NECESSARY UNNECESSARY ADJUSTMENT NOTES PART REPLACED IC2001 IC2101 X IC3001 X CRT X IC201 X X Data is stored in IC2101 The adjustment is needed to compensate...

Page 10: ...here raster is barely seen 7 Adjust the service adjustments S11 red S12 green and S13 blue to obtain a good grey scale with normal whites at low brightness level 8 Select the service adjustment S19 and reset data to 00 Select the service adjustment S03 and reset data to obtain normal color level 9 Remove oscilloscope and reset the master screen control to obtain normal brightness range White Balan...

Page 11: ...2 Make sure the customer brightness control is set to center position 3 Enter the service mode and select the service adjustment S04 4 Adjust S04 data value to obtain normal brightness level Vertical Size Adjustment 1 Receive a good local channel 2 Enter the service mode and select the service adjustment S09 3 While observing the top and bottom of the screen adjust S09 data value to proper vertica...

Page 12: ...1 Stereo pilot signal 9 4kHz 600mVrms 2 Enter the service mode and select the service adjustment M03 3 Adjust the data at the point where OK appears on the screen The OK represents the approximate center of the adjustable range of the data Separation Adjustment 1 Connect the rms voltmeter to pin 39 of IC3001 2 Receive the following composite stereo signal 1 Composite stereo signal 30 modulation le...

Page 13: ...13 17 16 19 18 15 14 13 12 11 10 CHASSIS LAYOUT 6 5 4 3 2 1 A B C D E F G H PWB K PWB B PWB H PWB A ...

Page 14: ...14 8 7 10 9 6 5 4 3 2 1 A B C D E F G H BLOCK DIAGRAM 6 5 4 3 2 1 A B C D E F G H ...

Page 15: ...ated 2 All voltages measured with 1000µ V B W or Color signal WAVEFORM MEASUREMENT CONDITIONS 1 Photographs taken on a standard gated color bar signal the tint setting adjusted for proper color The wave shapes at the red green and blue cathodes of the picture tube depend on the tint color level and picture control 2 indicates waveform check points See chart waveforms are measured from point indica...

Page 16: ...17 16 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H SCHEMATIC DIAGRAM MAIN 1 Unit ...

Page 17: ...19 18 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H SCHEMATIC DIAGRAM MAIN 2 Unit ...

Page 18: ...20 8 7 10 9 6 5 4 3 2 1 A B C D E F G H 6 5 4 3 2 1 A B C D E F G H SCHEMATIC DIAGRAM CRT and FRONT AV Units ...

Page 19: ...21 6 5 4 3 2 1 A B C D E F G H SCHEMATIC DIAGRAM S VIDEO Unit ...

Page 20: ...22 6 5 4 3 2 1 A B C D E F G H PWB A MAIN Unit Wiring Side PRINTED WIRING BOARD ASSEMBLIES ...

Page 21: ...23 6 5 4 3 2 1 A B C D E F G H PWB A MAIN Unit Chip Parts Side ...

Page 22: ... Q 1 5 0 1 Q 1 5 0 2 R 1 5 0 4 R 1 5 0 8 R 1 5 0 7 R 1 5 1 1 L 1 5 0 2 L 1 5 0 1 L 1 5 0 3 C 1 5 0 7 R 1 5 1 3 R 1 5 1 2 J 3 J 6 I C 1 5 0 1 P 1 5 0 3 K C R 1 5 1 7 R 1 5 1 5 C 1 5 1 3 D 1 5 0 4 J 2 J 1 1 6 D 1 5 0 1 C 1 5 0 1 R 1 5 1 8 J 5 J 4 C 1 5 1 1 C 1 5 0 8 C 1 5 0 3 R 1 5 1 6 R 1 5 1 9 D 1 5 0 2 C 1 5 0 9 C 1 5 1 2 K B 1 D 1 5 0 3 C 1 5 1 0 R 1 5 1 4 P 1 5 0 2 5 K A 1 5 P 1 5 0 1 PWB K S V...

Page 23: ...y å and shaded areas in the Replacement Parts Lists and Schematic Diagrams The use of a substitute replacement part which dose no have the same safety characteristic as the factory recommended replacement parts shown in this service manual may create shock fire or other hazards HOW TO ORDER REPLACEMENT PARTS To have your order filled promptly and correctly please furnish the following informations...

Page 24: ...35M 3 3 50V EL C406 VCEA0A1HW225M 2 2 50V EL C408 VCEA0A1HW106M 10 50V EL C409 VCEA0A1HW335M 3 3 50V EL C410 VCQYTA1HM104K 0 1 50V Mylar C411 VCEA0A1CW337M 330 16V EL C412 VCKYCY1HB103K 0 01 50V Ceramic C413 VCKYCY1HB103K 0 01 50V Ceramic C414 VCKYCY1CB104K 0 1 16V Ceramic Q451 VS2SB709AR 1 2SB709AR or VS2SA1037KQ 1 Q601 VS2SC2482 1 2SC2482 å Q602 VS2SD2539 1E 2SD2539 Q751 VS2SC3198 Y 1 2SC3198 Y ...

Page 25: ...CCY1HH221J 220p 50V Ceramic C908 VCEA0A1HW225M 2 2 50V EL C909 VCEA0A1HW225M 2 2 50V EL C951 VCEA0A1HW106M 10 50V EL C952 VCEA0A1HW106M 10 50V EL C954 VCKYCY1HF103Z 0 01 50V Ceramic C955 VCEA0A1CW106M 10 16V EL C956 VCEA0A1CW106M 10 16V EL C2001 VCCCCY1HH101J 100p 50V Ceramic C2002 VCCCCY1HH101J 100p 50V Ceramic C2040 VCEA0A1AW107M 100 10V EL C2041 VCEA0A1HW105M 1 50V EL C2060 VCKYCY1CB104K 0 1 16...

Page 26: ...19 VRD RA2BE153G 15k 1 8W Carbon R520 VRD MN2BE184J 180k 1 8W Carbon R523 VRN RL3AB1R0J 1 1W M Film å R524 VRS RG3AB391J 390 1W M Ox R526 VRD MN2BE562J 5 6k 1 8W Carbon R551 VRS CY1JF472J 4 7k 1 16W M Ox R552 VRS CY1JF102J 1k 1 16W M Ox R553 VRD MN2BE333J 33k 1 8W Carbon R554 VRD MN2BE333J 33k 1 8W Carbon å R604 VRS RG3LB392J 3 9k 3W M Ox R605 VRD RA2BE331J 330 1 8W Carbon R606 VRD RA2BE331J 330 1...

Page 27: ...D MN2BE272J 2 7k 1 8W Carbon R2601 VRD RA2BE331J 330 1 8W Carbon R3001 VRD RA2BE101J 100 1 8W Carbon R3002 VRD RA2BE101J 100 1 8W Carbon R3003 VRS CY1JF105J 1M 1 16W M Ox R3004 VRS CY1JF104J 100k 1 16W M Ox R3005 VRS CY1JF623J 62k 1 16W M Ox R3007 VRS CY1JF332J 3 3k 1 16W M Ox R3008 VRS CY1JF302J 3k 1 16W M Ox R3010 VRS CY1JF392J 3 9k 1 16W M Ox R3011 VRD MN2BE102J 1k 1 8W Carbon R3012 VRS CY1JF10...

Page 28: ... GBN P852 QPLGN0441CEZZ Plug 4 pin YBN SC851 QSOCV0937CEZZ CRT Socket INTEGRATED CIRCUIT IC1501 VHiM52055FP 1 M52055FP TRANSISTORS You can substitute VS2SD601AR 1 for VS2SC2412KQ 1 Q1501 VS2SC2412KQ 1 2SC2412K Q1502 VS2SB709AR 1 2SB709AR or VS2SA1037KR 1 Q1503 VS2SC2412KQ 1 2SC2412K Q1504 VS2SC2412KQ 1 2SC2412K DIODES You can substitute RH DX0475CEZZ for VHD1SS119 1 D1501 VHD1SS119 1 Diode D1502 V...

Page 29: ...d QCNW 0134MEZZ Connecting Cord QCNW 0145MEZZ Connecting Cord QCNW 0167MEZZ Connecting Cord QCNW 0252MEZZ Connecting Cord SP1 VSP0080PBL4YS Speaker L or VSP0080PBK9YA SP2 VSP0080PBL4YS Speaker R or VSP0080PBK9YA MISCELLANEOUS PARTS PWB H DUNTK9310WEK1 FRONT AV UNIT MISCELLANEOUS PARTS J1001 QJAKE0053GEZZ Jack Video in J1002 QJAKE0055GEZZ Jack Audio in L J1003 QJAKE0059GEZZ Jack Audio in R P1001 QP...

Page 30: ...eet PACKING PARTS NOT REPLACEMENT ITEM CABINET PARTS 1 CCABA1336MES0 Front Cabinet Ass y 1 1 Not Available Front Cabinet 1 2 GCOVA1011MEKA Lens for R C 1 3 GMADT0093MEKA Window for R C 1 4 HBDGE1007MESA Badge HITACHI 1 5 JBTN 1057MEKA Button Power Vol up down 1 6 JBTN 1058MEKA Button Ch up down 2 GCABB1159MEKA Rear Cabinet CABINET PARTS LOCATION 1 2 1 1 1 5 1 4 1 2 1 3 1 6 ...

Page 31: ...F THE SET REAR Use 22 staples fix the packing case Bar Code Label Packing Case Serial Number Label MARK Not replacement items Number Card FRONT Buffer Material Polyethylene Sheet Polyethylene Bag Warranty Registration Card Operation Manual Infrared R C Unit Batteries ...

Page 32: ...Ref No Part No Description Ref No Part No Description 34 ...

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