UNITED TVC5044, Service Manual

Page 1: ...edures I Schematic Diagrams I CBA s I Exploded views I Parts List Sec 2 Deck Mechanism Section I Standard Maintenance I Alignment for Mechanism I Disassembly Assembly of Mechanism I Alignment Procedur...

Page 2: ...1 Mechanical Trouble Indicator 1 7 7 Schematic Diagrams CBA s and Test Points 1 8 1 Waveforms 1 9 1 Wiring Diagram 1 10 1 System Control Timing Charts 1 11 1 IC Pin Function Descriptions 1 12 1 Lead...

Page 3: ...ity Horizontal 15 Vertical 10 3 High Voltage kV 22 Description Condition Unit Nominal Limit 1 Misconvergence Center m m 0 6 Corner m m 2 0 Side m m 1 5 2 Contrast Control Range dB 6 3 Brightness APL 1...

Page 4: ...n that still might be considered acceptable In no case should a unit fail to meet limit specifica tions TV NORM TUNER SENSIVITY RECEPTIVE TV CHANNELS Description Condition Unit Nominal Limit 1 Audio O...

Page 5: ...rongs tied together and touch the other ohmme ter lead in turn to each tuner antenna input ex posed terminal screw and if applicable to the coaxial connector If the measured resistance is less than 1...

Page 6: ...ed to the ground side of the AC power source To confirm that the AC power plug is inserted correctly with an AC volt meter measure between the chassis and a known earth ground If a voltage reading in...

Page 7: ...not contact sharp edged or pointed parts H When a power cord has been replaced check that 5 6 kg of force in any direction will not loosen it I Also check areas surrounding repaired locations J Use c...

Page 8: ...externally exposed accessible parts RF terminals an tenna terminals video and audio input and output ter minals microphone jacks earphone jacks etc Measuring Method Power ON Insert load Z between B ea...

Page 9: ...ot be reused Always use a new part Pb Lead Free Solder Pb free mark will be found on PCBs used Pb free solder Refer to figure For PCBs with Pb free mark be sure to use Pb free solder For PCBs without...

Page 10: ...s Use an appropriate hot air flat pack IC desoldering ma chine whose shape matches that of the Flat Pack IC 2 Do not apply the hot air to the chip parts around the Flat Pack IC for over 6 seconds as d...

Page 11: ...the Flat Pack IC on the CBA so you can install a replacement Flat Pack IC more easily b The I mark on the Flat Pack IC indicates pin 1 See Fig S 1 6 Make sure this mark matches the 1 on the CBA when p...

Page 12: ...static electricity that may be charged on the body Ground for Work Bench Be sure to place a conductive sheet or copper plate with proper grounding 1M on the work bench or other surface where the semi...

Page 13: ...not be oper ated automatically Preparing 2 1 To eject the tape press the STOP EJECT button on the unit or Remote Control 2 When you want to record during the Service mode press the Rec button while de...

Page 14: ...ge the Anode Lead of the CRT with the CRT Ground Wire before removing the Anode Cap 2 Removal of the Power Unit and Tray Chassis Unit Discharge the Anode Lead of the CRT with the CRT Ground before rem...

Page 15: ...and screw S 8 Then desolder connectors CN201 CL401 CL402 CL403 and lift up the Deck Unit 8 Removal of the Text CBA Remove a screw S 9 and TE Holder and discon nect connectors CN751 and CN752 Then lift...

Page 16: ...t and Tray Chassis Unit S 9 TE Holder 9 Text CBA 5 H V Power Supply CBA S 3 S 3 3 Power Unit Power Button S 3 S 4 S 4 S 4 S 5 7 Bottom Plate CL604 S 4 S 6 S 10 S 10 S 10 S 10 S 6 S 6 S 6 8 Deck Unit 6...

Page 17: ...1 5 4 T6627DC Fig 4 S 11 S 11 S 11 S 11 Anode Cap 11 CRT CRT CBA...

Page 18: ...ASSEMBLY CAPSTAN MOTOR DECK UNIT CN752 CN751 CN201 CL402 CL401 CL403 CL302A CL603A CL301A CN901 CN902 MAIN CBA TEXT CBA CN501 SCREEN FOCUS CN502 CN501B CL501A CN601 CN552 CN551 CN602 CRT ANODE GND H V...

Page 19: ...Tip Driver 9 RF input at each broadcasting system Receiving Channel VHF Low Input level 80dB V 10 Ext input FRONT VIDEO IN JACK or REAR SCART JACK How to Set up the Service mode NOTE After replacing t...

Page 20: ...of screen image may not be properly displayed Note R590 H V Power Supply CBA 1 Connect Frequency Counter to R590 2 Set the unit to the Ext mode and no input is neces sary Enter the Service mode See p...

Page 21: ...h or reddish in grayscale compared with PAL signal 1 Degauss the CRT and allow CRT to operate for 20 minutes before starting the alignment 2 Input the SECAM Gray Scale signal from Ext input 3 Enter th...

Page 22: ...page 1 6 1 Press 8 button on the remote control unit and select H P mode 2 Input monoscope pattern and leave it for at least 20 minutes 3 Press PROG PROG buttons on the remote con trol unit so that th...

Page 23: ...er to the CHROMA mode and after zero point calibration bring the optical recep tor to the center on the tube surface CRT 5 Enter the Service mode Press VOL button on the remote control 6 Press 4 butto...

Page 24: ...essed display will change BRT CNT COL TNT and SHP in that order CONTRAST CNT 1 Press MENU button on the remote control unit Then select CNT display 2 Press PROG PROG buttons on the remote control unit...

Page 25: ...sition will display on the screen if adjustment is necessary follow step 4 7 0H 448 s is preferable 5 Press PROG PROG buttons on the remote con trol unit if necessary The value will be changed in 0 5H...

Page 26: ...Y TO VIDEO BLOCK TO AUDIO BLOCK KEY SWITCH KEY SWITCH SW201 SW205 SCL MEMORY SDA 6 5 REC LED 24 REC LED 23 P DOWN L 85 P ON H P DOWN L P ON H 67 D202 REC AL 5V LD SW 9 I 2 C OPEN 45 71 AL 5V SW212 LD...

Page 27: ...IDEO AUDIO SIGNAL PROCESS REC VIDEO SIGNAL PB VIDEO SIGNAL MODE SP REC SERIAL DECORDER 48 52 54 56 61 63 96 95 93 94 CHARA INS CCD 1H DELAY BYPASS MUTE PB EE TUNER TUNER MUTE PB EE LINE SCART LINE SCA...

Page 28: ...FE H 2 FE H GND CL403 MAIN CBA PB AUDIO SIGNAL REC AUDIO SIGNAL Mode SP REC 71 A MUTE H SCL SDA TO SERVO SYSTEM CONTROL BLOCK TO SERVO SYSTEM CONTROL BLOCK FULL ERASE HEAD 68 69 SERIAL DECODER DECK AS...

Page 29: ...E 1 ACL 5 V RAMP FB 4 V DRIVE 3 MAIN CBA 32 21 17 12 13 30 28 20 27 11 10 14 31 15 16 6 7 43 36 VIDEO 34 CHROMA TRAP SERIAL I F INTELLIGENT MONITORING CHROMA BPF PAL DECODER SECAM DECODER BASE BAND 1H...

Page 30: ...501 CRT GND FOCUS SCREEN JK501 HEATER 1 1 CN501 CL501B CL501A REC VIDEO SIGNAL PB VIDEO SIGNAL CN551 P ON 160V 3 3 TO TV BLOCK CL302A 11 S F HV FOCUS VR SCREEN VR B TO POWER SUPPLY BLOCK DEF B H OUTPU...

Page 31: ...re you connect the AC plug to the AC power supply Otherwise it may cause some components in the power supply circuit to fail TIMER 5V P DOWN L TO PIN85 OF IC201 P ON ON AL 9V P ON 8V AL 12V 2 AL 12V 1...

Page 32: ...Malfunction 1 and immediately turn OFF the POWER MONITOR and switch over the Mechanical Malfunction mode with POWER OFF To return from this mode shall become possible only by POWER Key as in the case...

Page 33: ...the function according to its mode 4 Countermeasure for CASSETTE LOADING Mal function a CASSETTE IN operating Malfunction If LD SW does not go to SB position after a lapse of 5 sec or more from the C...

Page 34: ...dentified by the mark in the schematic diagram and the parts list Before replacing any of these components read the parts list in this manual carefully The use of substitute replacement parts that do...

Page 35: ...only original replacement parts which are listed with their part numbers in the parts list section of the service manual 4 Wire Connectors 1 Prefix symbol CN means connector can disconnect and reconne...

Page 36: ...Main 1 5 Schematic Diagram 1 8 3 1 8 4 T6627SCM1...

Page 37: ...Main 2 5 Schematic Diagram 1 8 5 1 8 6 T6627SCM2...

Page 38: ...Main 3 5 Schematic Diagram 1 8 7 1 8 8 T6627SCM3...

Page 39: ...Main 4 5 Schematic Diagram 1 8 9 1 8 10 T6627SCM4...

Page 40: ...1 8 11 1 8 12 T6627SCM5 Main 5 5 Schematic Diagram...

Page 41: ...l components in the power supply circuit are not defective before you connect the AC plug to the AC power supply Otherwise it may cause some components in the power supply circuit to fail CAUTION FOR...

Page 42: ...1 8 15 1 8 16 H V Power Supply 2 2 Schematic Diagram T6627SCP2...

Page 43: ...1 8 17 1 8 18 T6627SCCRT CRT Schematic Diagram...

Page 44: ...1 8 19 1 8 20 T6627SCT Text Schematic Diagram...

Page 45: ...1DIV 0 5V 20 s TP003 V OUT Upper WF6 Lower WF1 1DIV 0 2V 2DIV 5V 5ms TP008 C PB WF7 1DIV 0 2V 0 5ms IC301 PIN 52 WF8 1DIV 0 5V 0 5ms TP007 N A PB WF9 1DIV 0 5V 0 5ms IC401 PIN 8 WF10 1DIV 2V 5ms IC30...

Page 46: ...JUNCTION B CBA BT6600F01012 CN552 CL301A CL501B HEATER 1 GND 2 P ON 160V 3 CL501A HEATER 1 GND 2 P ON 160V 3 1 2 3 4 CL301B 1 2 3 4 CN301 JUNCTION C CBA BT6600F01012 CN502 H V POWER SUPPLY CBA BT6600...

Page 47: ...LD REV 0 2S 0 5S PIN NO CL EJ SS SS AU AU TL LD SW CL SS LD CONT C DRIVE Z ON ON C F R DRUM ROTATION P ON A MUTE H D REC H D PB H PAUSE ON PAUSE PAUSE ON PAUSE OFF PAUSE OFF AU AL AU SF SM EJ AU RS S...

Page 48: ...P A LD REV FF LD REV LD REV LD FWD LD FWD LD FWD LD FWD LD FWD LD FWD LD FWD REC PAUSE REC REC REW LD REV LD REV LD REV LD REV LD REV LD REV LD REV PAUSE REC or PAUSE STOP EJECT STOP EJECT STOP EJECT...

Page 49: ...28 NU Not Used 29 OUT SCART MUTE RAPID Switch Input Signal from Scart Jack 30 NU Not Used 31 IN REC SAFETY Record Protection Tab Detection 32 NU Not Used 33 NU Not Used 34 IN RESET System Reset Signa...

Page 50: ...Reel Rotation Signal 81 IN OUT LD CONT Loading Motor Control Signal 82 OUT TEXT L Teletext Control Signal 83 NU Not Used 84 NU Not Used 85 IN P DOWN L Power Voltage Down Detector Signal at Low 86 NU...

Page 51: ...F H J 2SC3468 D E AE BN1F4M T KTA1267 GR KTA1271 Y KTC3198 GR KTC3199 GR MID 32A22F PT204 6B 12 2SA1346 2SC1815 GR TPE2 2SC2120 O TPE2 2SC2120 Y TPE2 2SC3331 T U KRA103M KTA1266 GR KTC3203 Y KTC3207...

Page 52: ...01 1B1 A A L2 PB5 PB1 PB4 PL2 PL2 PL2 PL1 TB3 CL604 TB21 TB7 PL1 PL1 H V Power Supply CBA Sensor CBA CRT CBA Sensor CBA Main CBA Junction A CBA Junction C CBA Junction B CBA Text CBA V501 CLN551 DG601...

Page 53: ...1 14 3 T6627PEX Packing S3 S6 X3 S2 X4 X1 TAPE S1 FRONT S4 X2 3 X2 7 X2 14 X2 15...

Page 54: ...UA 0EM404793 L9 SCREW S TIGHT 3X4 BIND HEAD GBMS3040 L551 DEFLECTION YOKE LLBY00ZSY005 or LLBY00ZSY005 DEFLECTION YOKE KDY3GDA82X LLBY00ZMS011 SP151 SPEAKER S08F02B or DSD0808XQ010 SPEAKER J F097 C5 D...

Page 55: ...50V or CHD1JJBCH220 CHIP CERAMIC CAP 1608 CH J 22pF 50V CHD1JJ3CH220 C211 ELECTROLYTIC CAP 47 F 6 3V M H7 CE0KMAVSL470 C212 CHIP CERAMIC CAP MELF F Z 0 01 F 16V or CZM1CZB0F103 CHIP CERAMIC CAP MELF...

Page 56: ...CHIP CERAMIC CAP 1608 B K 0 01 F 50V CHD1JK30B103 C315 CHIP CERAMIC CAP F Z 0 1 F 50V or CHD1JZB0F104 CHIP CERAMIC CAP F Z 0 1 F 25V or CHD1EZB0F104 Ref No Description Part No CHIP CERAMIC CAP 1608 F...

Page 57: ...04 CHIP CERAMIC CAP 1608 F Z 0 1 F 50V or CHD1JZ30F104 CHIP CERAMIC CAP 1608 F Z 0 1 F 25V CHD1EZ30F104 C427 CHIP CERAMIC CAP F Z 0 1 F 50V or CHD1JZB0F104 Ref No Description Part No CHIP CERAMIC CAP...

Page 58: ...CAP 100 F 6 3V H7 CE0KMAVSL101 CONNECTORS CN201 FFC FPC CONNECTOR 12P 04 6232 112 103 800 JC62D12TM003 CN303 CONNECTOR BASE 5P TUC P05P B1 J3TUA05TG001 CN751 CONNECTOR BASE 8P TUC P08P B1 J3TUA08TG001...

Page 59: ...WZ1D32A22F Ref No Description Part No PHOTO TRANSISTOR PT204 6B 12 NPWZT2046B12 Q206 RES BUILT IN TRANSISTOR KRA103M or NQSZ0KRA103M RES BUILT IN TRANSISTOR 2SA1346 or 2SA1346Z RES BUILT IN TRANSISTOR...

Page 60: ...R205 CARBON RES 1 4W J 1k RCX4JATZ0102 R206 CHIP RES 1608 1 10W J 390k or RRXAJB5Z0394 CHIP RES 1608 1 10W J 390k RRXAJR5Z0394 R207 CHIP RES 1608 1 10W J 10k or RRXAJB5Z0103 CHIP RES 1608 1 10W J 10k...

Page 61: ...152 CHIP RES 1608 1 10W J 1 5k RRXAJR5Z0152 Ref No Description Part No R279 CHIP RES 1608 1 10W J 560 or RRXAJB5Z0561 CHIP RES 1608 1 10W J 560 RRXAJR5Z0561 R280 CHIP RES 1608 1 10W J 1 5k or RRXAJB5Z...

Page 62: ...RRXAJB5Z0103 CHIP RES 1608 1 10W J 10k RRXAJR5Z0103 R689 CARBON RES 1 4W J 82 RCX4JATZ0820 Ref No Description Part No R690 CARBON RES 1 4W J 82 RCX4JATZ0820 R691 CARBON RES 1 4W J 2 7 RCX4JATZ02R7 R69...

Page 63: ...CHIP RES 1608 1 10W J 100 RRXAJR5Z0101 R869 CHIP RES 1608 1 10W J 2 7k or RRXAJB5Z0272 CHIP RES 1608 1 10W J 2 7k RRXAJR5Z0272 R870 CHIP RES 1608 1 10W J 56k or RRXAJB5Z0563 Ref No Description Part No...

Page 64: ...5V M or CE1EMASDL470 ELECTROLYTIC CAP 47 F 25V M CE1EMASTL470 C556 ELECTROLYTIC CAP 2 2 F 50V M or CE1JMASDL2R2 ELECTROLYTIC CAP 2 2 F 50V M CE1JMASTL2R2 C558 FILM CAP P 0 047 F 50V J or CMA1JJS00473...

Page 65: ...D603 DIODE 1N5399 B P NDLZ001N5399 D604 DIODE 1N5399 B P NDLZ001N5399 D605 SWITCHING DIODE 1SS133 T 77 or QDTZ001SS133 Ref No Description Part No SWITCHING DIODE 1N4148 NDTZ001N4148 D609 ZENER DIODE...

Page 66: ...Ref No Description Part No R576 CARBON RES 1 4W J 39 RCX4JATZ0390 R577 METAL OXIDE FILM RES 2W J 560 or RN02561ZU001 METAL OXIDE FILM RES 2W J 560 RN02561DP004 R578 CARBON RES 1 4W J 39 RCX4JATZ0390...

Page 67: ...15 0T TP504 PCB JUMPER D0 6 P15 0 JW15 0T VR601 CARBON P O T 20k B or VRCB203KA011 CARBON P O T 20k B VRCB203HH014 W601 AC CORD PE8G2CG9G0A 055 WAE0162LW001 Ref No Description Part No Ref No Descripti...

Page 68: ...T 77 or QDTZ001SS133 SWITCHING DIODE 1N4148 NDTZ001N4148 D906 SWITCHING DIODE 1SS133 T 77 or QDTZ001SS133 SWITCHING DIODE 1N4148 NDTZ001N4148 D907 SWITCHING DIODE 1SS133 T 77 or QDTZ001SS133 SWITCHING...

Page 69: ...hanical Alignment Procedures 2 3 1 Disassembly Assembly Procedures of Deck Mechanism 2 4 1 Alignment Procedures of Mechanism 2 5 1 Deck Exploded Views 2 6 1 Deck Parts List 2 7 1 Sec 2 Deck Mechanism...

Page 70: ...USTMENTS 3 For the reference numbers listed above refer to Deck Exploded Views H Hours Cleaning I Change Deck Periodic Service Schedule Ref No Part Name 1 000 H 2 000 H 3 000 H 4 000 H B2 Cylinder Ass...

Page 71: ...ard material but since it is very thin avoid cleaning it vertically 2 Wait for the cleaned part to dry thoroughly before operating the unit 3 Do not reuse a stained head cleaning stick or a stained ch...

Page 72: ...Alignment Tape FL6N8 2 Head model FL6NS8 4 Head model Azimuth and X Value Adjustment of ACE Head Adjustment of Envelope Waveform J 2 Guide Roller Adj Screwdriver Available Locally Guide Roller J 3 Mi...

Page 73: ...that the Moving guide preparations are in the Eject Position 4 Turn the LDG Belt in the appropriate direction shown in Fig M1 until the Moving guide prepara tions come to the Eject Position Stop turni...

Page 74: ...heck to see that the tape is not creasing and that there is no slack on the supply and take up side Guide Rollers Use a blank tape Adjust the height of the Guide Rollers Supply side and take up side U...

Page 75: ...e ACE Head Fig M6 1 B X Value Alignment Purpose To obtain maximum PB FM envelope signal at the pre set position of the Tracking Control Circuit align the Horizontal Position of the ACE Head Symptom of...

Page 76: ...omes as flat as possible To do this adjust ment turn the top of the Guide Roller with the Guide Roller Adj Screwdriver 3 If the envelope is as shown in Fig M7 adjust the height of Guide Roller 2 Refer...

Page 77: ...Playback the alignment tape FL6N8 and confirm that the audio signal output level is 8kHz 3 Adjust Azimuth Adj Screw so that the output level on the AC Voltmeter or the waveform on the oscillo scope i...

Page 78: ...DM5 7 7 Cylinder Assembly T DM1 DM6 Desolder 3 S 2 8 8 Loading Motor Assembly T DM1 DM7 Desolder LDG Belt 2 S 3 9 9 ACE Head Assembly T DM1 DM7 S 4 10 2 Tape Guide Arm Assembly T DM1 DM8 1 P 2 11 10...

Page 79: ...ws for lubrication 32 25 Loading Arm SP Assembly B DM2 DM14 Refer to Alignment Sec Page 2 5 1 33 32 Loading Arm TU Assembly B DM2 DM14 Refer to Alignment Sec Page 2 5 1 34 2 25 M Brake TU Assembly T D...

Page 80: ...2 4 3 Z13PDA 14 13 11 10 12 7 8 30 40 16 39 38 42 41 43 9 34 15 36 35 29 Fig DM1 Top View 46 32 20 33 24 25 27 26 23 28 31 21 22 Bottom View Fig DM2...

Page 81: ...D Pull up Slide 1 2 A S 10 3 6 6 L 2 Pin A Hole A Pin B Hole B L 1 First insert 6 diagonally in 3 as shown below Then install 6 in 3 while pushing L 1 in a direction of arrow After installing 6 in 3...

Page 82: ...7 A 8 9 S 4 S 3 LDG Belt 8 Pin of 12 Pin of 10 Groove of 28 View for A Fig DM8 1 When reassembling 10 and 12 confirm that pin of 10 and pin of 12 are in the groove of 28 as shown 28 11 13 12 A 10 L 4...

Page 83: ...to Fig A Fig A 13 12 P 3 Fig B Top view Install pin of 12 in groove of 28 Refer to Fig B 28 Hold 12 and 13 till groove of pin of chassis looks and fit 13 in notch of chassis Then turn a few 13 while...

Page 84: ...5 28 When installing 23 install the spring P 5 to 28 as shown in the left figure and then install 23 while pressing the spring P 5 to the direction of the arrow in the left figure and confirming that...

Page 85: ...and 28 as shown Bottom View 28 25 28 Top View First tooth on 44 First groove on 28 Installation of 25 When reassembling 28 align the first groove on 28 to the first tooth on 44 as shown Fig DM13 2 Fig...

Page 86: ...2 4 9 Z13PDA Fig DM16 43 41 42 L 13 Fig DM17 44 45 Slide P 9...

Page 87: ...the mechanical or electrical parts Alignment points in Eject Position Alignment 1 Loading Arm SP and TU Assembly Install Loading Arm SP and TU Assembly so that their triangle marks point to each other...

Page 88: ...MH D Blue grease SLIDUS OIL 150 B12 B492 B11 B571 B37 Some Ref Numbers are not in sequence B126 B8 B121 B426 B560 L1450 L1450 L1466 B501 Chassis Assembly Top View Lubricating Point Chassis Assembly Bo...

Page 89: ...G84M Yellow grease B508 B414 View for A Grease point B516 B559 B52 B134 B133 B568 B569 B565 B417 Some Ref Numbers are not in sequence Bottom Side Grease point B507 B488 B570 B491 B513 B502 Bottom Side...

Page 90: ...View 3 Mark Description Floil G 684G or Multemp MH D Blue grease SLIDUS OIL 150 B563 B300 B562 B482 B355 B354 B483 B425 L1321 B347 L1321 B313 L1341 B303 B555 B514 Some Ref Numbers are not in sequence...

Page 91: ...PINCH ARM A ASSEMBLY 4 MK12 or 0VSA13572 PINCH ARM A ASSEMBLY 5 MK12 0VSA13788 B411 PINCH SPRING MK12 0VM414644 B414 M BRAKE SP ASSEMBLY MK12 5 0VSA14994 B416 M BRAKE TU ASSEMBLY MK12 0VSA13283 B417...

Page 92: ...EAD GCMS9080 L1321 SCREW S TIGHT M3X6 BIND HEAD GBMS3060 L1341 SCREW P TIGHT M2X6 PAN HEAD GPMP2060 L1406 AC HEAD SCREW MK9 0VM410964 L1450 SCREW SEMS M2 6X5 PAN HEAD CPM39050 L1466 SCREW S TIGHT M2 6...