Memorex MVT2194 Page 52 Service Manual Download

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WAVEFORMS

23 POWER ON

50.0V 20

s/div

The following waveforms were measured at the point of the corresponding
balloon number in the schematic diagram.

NOTE:

CRT

22 POWER ON

50.0V 20

s/div

21 POWER ON

50.0V 20

s/div

20 POWER ON

200mV 20

s/div

19 POWER ON

2.0V 20

s/div

H-2

Summary of Contents for MVT2194

Page 1: ...SERVICE MANUAL MVT2194 Design and specifications are subject to change without notice COLOR TELEVISION VIDEO CASSETTE RECORDER ORIGINAL MFR S VERSION A...

Page 2: ...ther there are the portions which are deteriorated around the serviced places serviced or not Check the insulation between the antenna terminal or external metal and the AC cord plug blades And be sur...

Page 3: ...irection of the arrow by hand to slacken the Video Tape Rotate the Clutch Ass y either of the directions to wind the Video Tape in the Cassette Case Repeat the above step 3 4 Then take out the Video C...

Page 4: ...CTRICAL ADJUSTMENTS BLOCK DIAGRAMS TV Y C AUDIO HEAD AMP MICON IN OUT AV PRINTED CIRCUIT BOARDS SYSCON CRT SCHEMATIC DIAGRAMS Y C AUDIO HEAD AMP MICON IN OUT AV CHROMA IF SOUND AMP TV POWER DEFLECTION...

Page 5: ...w CATV Tuning System F Synth Input Impedance VHF UHF 75 ohm CH Coverage 2 69 4A A 5 A 1 A I J W W 1 W 84 Intermediate Picture FP 45 75MHz Frequency Sound FS 41 25MHz FP FS 4 5MHz Preset CH No Stereo D...

Page 6: ...st Sharpness Color Yes Tint Yes Bass Treble Balance No Manual Tracking Yes Play Stop FF Rew Rec OTR T Rec Pause Eject Tape In Symbol Mark Yes Auto Tracking Manual Tracking Yes Caption Text Yes Index Y...

Page 7: ...lay Auto Rewind Auto Eject Yes VIDEO PLUS SHOWVIEW G CODE No Auto Clock Yes Forward Reverse Picture Search Yes One Touch Playback No Auto CH Memory Yes Closed Caption Yes TV Auto Shut off Function Yes...

Page 8: ...Front Video Input RCAx1 Audio Input RCAx1 Other Terminal Head Phone Stereo Mono 3 5mm Rear Video Input No Audio Input No Video Output No Audio Output No Euro Scart No Diversity No Ext Speaker No DC J...

Page 9: ...row B Remove the screw 6 Remove the Syscon PCB in the direction of arrow C NOTE Do not remove the cable at the FE Head section The FE Head may be damaged if you remove the cable by force B1 1 CRT PCB...

Page 10: ...DISASSEMBLY INSTRUCTIONS B1 2 Deck Shield Plate Fig 1 4 Deck Chassis B 6 Syscon PCB Deck Holder 2 C 2 3 1 3 4 5 5 A 3 FE Head...

Page 11: ...case of the Locker R installation check if the one position of Fig 2 3 B is correctly locked When you install the Cassette Side R be sure to move the Locker R after installing 2 4 LINK UNIT Refer to...

Page 12: ...s correct In case of the Loading Motor installation hook the wire on the Cassette Opener as shown Fig 2 6 C When installing the wires between Capstan DD Unit and Loading Motor connect them correctly a...

Page 13: ...M If you do not grease noise may be heard in FF REW mode After installing the reel adjust the height of the reel Refer to MECHANICAL ADJUSTMENT 1 2 3 4 5 6 Fig 2 9 A NOTE 1 2 In case of the S Reel and...

Page 14: ...C Head Use gloves When you install the A C Head Spring install as shown in Fig 2 11 B When you install the A C Head tighten the screw 1 first then tighten the screw 2 finally tighten the screw 3 1 2...

Page 15: ...Rod Tension Lever Loading Arm S Unit and Loading Arm T Unit Main Rod Main Loading Gear Loading Arm T Unit Loading Arm S Unit Fig 2 16 A 1 1 2 2 14 CAPSTAN DD UNIT Refer to Fig 2 14 A Remove the Capst...

Page 16: ...ig 2 18 B Fig 2 18 C Cassette Guide Post Cassette Guide Post 2 17 Remove the Polyslider Washer 1 Remove the Clutch Ass y and Ring Spring Remove the Clutch Lever Remove the Coupling Gear Coupling Sprin...

Page 17: ...p up the sides of the Rubber Cap in the direction of the arrow and remove one side of the support Refer to Fig 3 2 2 GND on the CRT Screwdriver Alligator Clip Support CRT GND on the CRT Rubber Cap CRT...

Page 18: ...sing a blower type IC desoldering machine Refer to Fig 4 2 2 Fig 4 2 NOTE Do not add the rotating and the back and forth directions force on the IC until IC can move back and forth easily after desold...

Page 19: ...8 Thin tip Soldering Iron NOTE When the IC leads are bent during soldering and or repairing do not repair the bending of leads If the bending of leads are repaired the pattern may be damaged So be al...

Page 20: ...op Frequency Generator Front Loading Switch Frequency Modulation Frequency Sub Carrier Forward Generator Ground High Pass Filter I K L M N O P R S H SW Hz IC IF IND INV KIL L LED LIMIT AMP LM LDM LP L...

Page 21: ...or Separation Transistor Tracking Trick Playback Test Point Unregulated Volt Voltage Controlled Oscillator Video Intermediate Frequency Vertical Pulse Voltage Display Video Playback Variable Resistor...

Page 22: ...djustment of OSD NOTE Also can be adjusted by using the Adjustment MENU Refer to the ELECTRICAL ADJUSTMENT OSD HORIZONTAL VOL MIN 3 Adjust the PG SHIFTER automatically Refer to the ELECTRICAL ADJUSTME...

Page 23: ...arts which the rubber touches Replace when rolling becomes abnormal Clean the Head T Brake Band Clutch Ass y Idler Arm Ass y CONFIRMATION OF HOURS USED POWER ON total hours and PLAY REC total hours ca...

Page 24: ...in the same manner Refer to the figure below 2 TAPE RUNNING SYSTEM When cleaning the tape transport system use the gauze moistened with isopropyl alcohol 3 CYLINDER Wrap a piece of chamois around your...

Page 25: ...have the correct DATA for the new MEMORY IC ADDRESS is now selected and should blink Using the SET button on the remote step through the ADDRESS until required ADDRESS to be changed is reached Press...

Page 26: ...ewdriver Master Plane Reel Disk Height Adjustment Jig Torque Tape VHT 063 Cable Monoscope 6KHz For 2 heads model Color Bar 1KHz For 2 heads model Hi Fi Audio For 2 heads model X Value Adjustment For 2...

Page 27: ...TENSION POST POSITION 1 2 3 Set to the PLAY mode Adjust the adjusting section for the Tension Arm position so that the Tension Arm top is within the standard line of Main Chassis While turning the S...

Page 28: ...shifter during playback Refer to the ELECTRICAL ADJUSTMENTS NOTE After adjustment confirm and adjust A C head Refer to item 2 2 Fig 2 1 A CH 1 Envelope TP4001 CH 1 Track CH 2 Track CH 2 SW Pulse TP10...

Page 29: ...of the oscilloscope to TP1002 CH 2 to TP4001 and CH 3 to HOT side of JG180 Audio Out Jack Playback the VHS Alignment Tape JG001S or JG001T Refer to SERVICING FIXTURE AND TOOLS Press and hold the ATR...

Page 30: ...STMENT PARTS LOCATION GUIDE 5 6 7 8 9 10 1 2 3 4 1 Tension Connect 2 Tension Arm 3 Guide Roller 4 Audio Control Head 5 X value adjustment driver hole 6 7 8 9 10 P4 Post T Brake Spring T Reel S Reel Ad...

Page 31: ...OL MAX COL MIN TINT SHARP FM LVL LVL SEP1 SEP2 T MONO T STE NO 16 17 18 19 20 21 22 23 24 25 26 27 28 29 TV 00 OSD H 22 Oscilloscope Digital Voltmeter Pattern Generator 1 2 3 VCR SECTION 2 1 PG SHIFTE...

Page 32: ...E without signal Adjust the VR502 until the digital voltage is 135 0 5V 2 8 HORIZONTAL PHASE 1 2 3 4 Receive the monoscope pattern Using the remote control set the brightness and contrast to normal po...

Page 33: ...GE VARIABLE knob of the oscilloscope until the range between white 100 and 0 is set to 4 scales on the screen of the oscilloscope Press the VOL UP DOWN button on the remote control until the red color...

Page 34: ...he magnet Refer to the adjusted CRT for the position Refer to Fig 3 1 If the deflection yoke and magnet are in one body untighten the screw for the body Receive the green raster pattern from the color...

Page 35: ...CONNECTION ELECTRICAL ADJUSTMENTS CP351 TU601 VR502 VR401 FH504 AC IN TP4001 TP1002 TP1001 CP1003 C P 4 0 0 2 CP851A J801 TP803 TP801 CRT PCB C P 8 5 1 B S801 CRT CP801 SYSCON PCB FB401 CP401 CRT A C...

Page 36: ...3 579545MHz 54 Q602 Q603 REG Q606 Q604 Q605 F501 14 13 UNREG 8V 1 2 TH501 POWER_FAIL 2 51 1 E180V 24 TV_POWER H HEAD SP SP CP354 J351 FB401 L503 DEGAUSS COIL REG REG 53 19 AT 12V UNREG 8V AT 12V 2 1 M...

Page 37: ...VIDEO Y C AUDIO 6 2 3 1 5 Q4005 BIAS CTL 11 4 P CON 5V 1 C ROT RF SW IN AUDIO MUTE HA SW ENV DET Q4006 BIAS OSC Q4003 SW Q4001 Q4002 AUDIO PB SW Q4012 BUFFER COIL BIAS OSC R P P R P L H L C LPF REC AM...

Page 38: ..._CTL CP1001 1 3 4 2 REEL SENS Q1005 POWER FAIL2 MICON IN OUT AV BLOCK DIAGRAM SDA SCL OSD_R CTL SD_VIDEO CTL V REC_ST_H VD OSD_G AFT_M OSD_B OSD_BLK HD Y C AUDIO HEAD AMP TV CAPSTAN DD UNIT FF REW L 9...

Page 39: ...82 C P 40 02 W087 W069 TP1002 W174 W175 W176 W181 C1018 D1014 W190 W194 W193 W188 W141 Q1011 CP1001 W136 W068 W139 W179 W137 W157 W127 R1010 W108 W132 W071 W162 W169 W243 W183 W245 W238 W138 W192 W210...

Page 40: ...C1010 C1023 C1004 R1036 C1027 Q1004 C1022 C1025 R1012 C1019 R1013 R1009 C1013 C1071 R1034 R1033 C1038 C1035 C1034 C1031 R1031 R1032 C1046 C1047 C1040 C1048 R1040 C1049 C1050 R1070 R1083 R1087 I C 1 0...

Page 41: ...SIGNAL REC AUDIO SIGNAL PB RECORD LUMINANCE SIGNAL T4001 1626009 COIL BIAS OSC 1 2 3 4 5 6 IC4001 LA71206M MPB Y C AUDIO HEAD AMP IC 1 10 11 12 13 14 15 16 17 18 19 2 20 21 22 23 24 25 26 27 28 29 3 3...

Page 42: ...SIGNAL D1014 MTZJ6 8B DURING PLAYBACK MEASURED WITH THE DIGITAL TESTER NOTE THE DC VOLTAGE EACH PART WAS PLAYBACK VIDEO SIGNAL AUDIO SIGNAL REC POWER_FAIL2 P CON 5V GND MOTOR 12V SDA SCL Y C_CS OSD_R...

Page 43: ...1 2 3 4 DURING PLAYBACK MEASURED WITH THE DIGITAL TESTER NOTE THE DC VOLTAGE EACH PART WAS PLAYBACK LUMINANCE SIGNAL AUDIO SIGNAL REC AUDIO SIGNAL PB RECORD LUMINANCE SIGNAL PLAYBACK COLOR SIGNAL AT 5...

Page 44: ...G AND SUBJECT TO CHANGE WITHOUT NOTICE NOTE THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME C4211 0 1 F C4205 470P CH R380 68 1 2W R381 68 1 2W R1056 100 1 4W R4203_1 75 R2201 820 R2202 1K R2203 1 5K...

Page 45: ...1 50V KA C659 100 6 3V KA Q607 2SC2412K H_CONT Q606 KTC3203_Y REG Q605 KTD863_Y REG Q604 KTD863_Y REG Q602 KTC3203_Y REG Q603 KTC3203_Y REG W828 W895 W842 W801 W827 W871 W861 W915 W865 W850 W852 W874...

Page 46: ...PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE NOTE THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME C354 2200 16V YK C351 2 2 50V KA C301 0 012 B R353 68K R359 47K R357 1K R352 4 7K C356_1 10 50V KA...

Page 47: ...7 1SS133 S101A S102A CP505 003P 2100 CP504 003P 2100 OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE NOTE THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME C524_1 2200 16V YK C511 470 25V YK C521 220...

Page 48: ...O CHANGE WITHOUT NOTICE NOTE THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME C402 1000 35V YK C419_2 22 100V MHE C418 22 50V YK C424 0 0068 1 25KV MPP C438 0 001 500V B C417_1 0 01 100V MMTS C423 0 3...

Page 49: ...ARE D801 1SS133T 77 D802 ISS133T 77 D803 1SS133T 77 R SIGNAL B SIGNAL G SIGNAL S801 S802 OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE NOTE THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME C810 470...

Page 50: ...289 TCB418 AUDIO_REC AUDIO_REC AUDIO_PB AUDIO_PB AE_HEAD AE_HEAD GND GND FE FE HEAD FE HEAD FE HEAD FE HEAD CUT_OFF_SW CUT_OFF_SW TM101 FROM OS2201 TO OS2201 REMOCON SENSOR COMMAND TRANSMITTER TM101 B...

Page 51: ...V 5ms div 13 PB 1 0V 5ms div 11 PB 0 5V 0 5ms div 8 POWER ON 1 0V 10 s div 9 PB 1 0V 10ms div 6 POWER ON 1 0V 20 s div 2 POWER ON 100mV 0 1 s div 1 PB 0 5V 20 s div 7 POWER ON 0 5V 10ms div MICON 5 RE...

Page 52: ...iv The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram NOTE CRT 22 POWER ON 50 0V 20 s div 21 POWER ON 50 0V 20 s div 20 POWER ON 200mV 20 s...

Page 53: ...NICAL EXPLODED VIEW I1 1 109 202 202 102B 102B 102A 202 202 202 202 102 205 112 205 205 205 L503 V801 111 PCB110 CRT PCB ASS Y J801 112 112 112 101C 101D 101F 101B 101G SP351 212 101A 101 101E 213 101...

Page 54: ...MECHANICAL EXPLODED VIEW I1 2 PCB010 SYSCON PCB ASS Y 106 204 204 204 203 211 203 108 201 A 107 206 209 TU601 FB401 210 104 103 105 206 208 113 207 107 201 104...

Page 55: ...19 320 AB 316 318 347 AB AB AA AA AA AA AB AB AE AE AE AC CD1501 M101 304 CD1502 510 348 350 302 AB AD AC Applying positions AA AB AC AD and AE for the grease are displayed for this section Check if t...

Page 56: ...A AA AD AA AA AA AA AA CD1501 CD1502 AA 339 AA AA Applying positions AA AB AC AD and AE for the grease are displayed for this section Check if the correct grease is applied for each position NOTE PART...

Page 57: ...T CAUTION 111 741WUA0021 SPRING EARTH 112 800WR0A002 SHEET CRT SUPPORT 113 899HV3T000 HOLDER ANODE WIRE 201 8117540B04 SCREW TAPPING B0 TRUSS 4x20 202 8117540A64 SCREW TAPPING B0 TRUSS 4x16 203 810763...

Page 58: ...Q02014 HEAD FULL ERASE VTR 1X2ERS11 154 314 85OA400235 TENSION ARM ASS Y 2 M101 1596P98001 MOTOR LOADING MXN13FB12K3 or 315 85OA400231 INCLINED BASE S UNIT 1596S98001 MOTOR LOADING MDB2B66 316 85OP800...

Page 59: ...02LF1222M CE 2200 UF 10V TPAAD05003 COMPOUND TRANSISTOR KRA104SRTK C530 CD39E0M13M CC 0 001 UF 250V Q405 TC5T01627Y TRANSISTOR SILICON 2SC1627_Y TPE2 C535 C0PLRR713K CC 0 001 UF 2KV R Q406 TD3U021400...

Page 60: ...COIL 100 UH X1001 100CT01207 CRYSTAL HC 49 U S L4005 02167F470J COIL 47 UH X1002 100DA32R01 CRYSTAL DT 26 L4006 02167F470J COIL 47 UH X4001 100CT3R502 CRYSTAL HC 49 U L4009 02167F101J COIL 100 UH T40...

Page 61: ...M5M1 04Q SPEC NO O R NO W465004...

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