Sanyo VHR-M261EV Service Manual Download Page 21

Page: 21 / 88

3-6

2. Servo Circuit

Unstable Video in PB

Mode.

Does the on screen noise
level change periodically?

Do CTL pulses appear at

IC501 pin 37?

Does the CFG divide
waveform appear at IC501
pin 40?

Do the CTL pulses move
when TRK is operated?

Replace IC501.

Does the Video Envelope
waveform appear at IC501
Pin 12?

YES

Is the height of the CTL
Head adjusted correctly?

Replace IC501.

Check AVCP IC.

Adjust the CTL Head.

Summary of Contents for VHR-M261EV

Page 1: ...CKDIAGEAMS 2 ELECTRICAL CIRCUITDIAGEAMS1 3 ELECTRICAL CIRCUITDIAGEAMS2 4 ELECTRICAL PRINTEDCIRCUITBOARD1 5 ELECTRICAL PRINTEDCIRCUITBOARD2 6 MECHANISM PARTSLOCATIONS MECHANISM DISASSEMBLY1 7 MECHANISM DISASSEMBLY2 8 MECHANISM DISASSEMBLY3 9 MECHANISM ADJUSTMENT A MECHANISM MAINTENACE INSPECTIONPROCDURE MECHANISM TROUBLESHOOTING B MECHANISM EXPLODEDVIEWS C REPLACEMENTPAETSLIST ...

Page 2: ...L FILE NO Video Cassette Recorder VHR M291EV VHR M261EV Product Code 143 182 15 Europe VHR M271SP Product Code 143 182 16 Spain Portugal VHR M291E Product Code 143 182 12 U K VHR M291EV Product Code 143 182 14 Europe VHR M291IR Product Code 143 182 13 Ireland ...

Page 3: ...REFERENCE MODEL NUMBER DECODER FRONT REAR VHR M291E NO NO 2SCART VHR M291IR NO NO 2SCART VHR M271SP CANAL NO 2SCART VHR M261EV NO NO 1SCART VHR M291EV NO NO 1SCART ...

Page 4: ... 1 ELECTRICAL ADJUSTMENT PROCEDURES 3 2 1 Servo Circuit 3 2 ELECTRICAL TROUBLESHOOTING GUIDE 3 3 1 Power Circuit SMPS 3 3 2 Servo Circuit 3 6 3 System Front Panel Circuit 3 9 4 Y C Circuit 3 11 5 Tuner IF Circuit 3 15 BLOCK DIAGRAMS 3 17 1 Power Block Diagram 3 17 2 Tuner IF NICAM A2 Block Diagram 3 19 3 Y C Block Diagram 3 21 4 System Block Diagram 3 23 5 AUDIO Block Diagram 3 25 6 SCART Block Di...

Page 5: ... LD LED LD VTG CTL Loading Voltage Control LECHA Letter Character L M Level Meter LP Long Play LPF Low Pass Filter M MAX Maximum MD Modulator MECHA CTL Mechanism Control MIC Microphone MIN Minimum MIX Mixer Mixing M M Monostable Multivibrator MMV Mono Multi Vibrator MOD Modulation Modulator MODEM Modulator Demodulator MPX Multiplex N NR Noise Reduction O OSC Oscillator OSD On Screen Display P PB P...

Page 6: ...ay tubes and those specified for compliance with various regulations regarding spurious radiation emission 3 Use Specified internal wiring Note especially 1 Double insulated wires 2 High voltage leads 4 Use specified insulating materials for hazardous live parts Note especially 1 Insulation Tape 2 PVC tubing 3 Spacers 4 Insulation sheets for transistor 5 Observe that wires do not contact heat prod...

Page 7: ...el only Note This table is unofficial and for reference only Be sure to confirm the precise values for your particular country and locality Leakage Current test Confirm specified or lower leakage current between B earth ground power cord plug prongs and externally exposed accessible parts RF terminals antenna terminals video and audio input and output terminals micro phone jacks earphone jacks etc...

Page 8: ... are switched to Low As a result POWER Switching TR is kept from generating heat and fire POWER for each IC S 5V POWER SECAM IC Series 5VT POWER AVCP IC P Y I 5V POWER Modulator Series 5VT POWER AVCP IC Short protection off mode DJ01 Diode in PROPOSAL FOR APPLYING SHORT PROTECTION IIC BUS 5VT SW POWER CONTROL MASTER TIMER CONTROL 5VT SW SLAVE with 5V SLAVE with 5V 5 3VA Timer Control AVCP IC TUNER...

Page 9: ...r being switch all and no tapes OK is displayed at FLD for FLD models and LED becomes on for LED CLOCK models This is the state that initializing EEPROM is finished In case of PAL VCP if holding the REC button on the front panel and the MENU button on the remote control handset for 5 7 seconds with power being off and no tapes All the LED DOTs become on This is the state that initializing EEPROM i...

Page 10: ...ature 41 F 95 F 5 C 35 C Operating humidity Less than 80 Timer 24 hours display type Video Television system CCIR standard 625 lines 50 fields PAL B G colour signal VHR M271SP M261EV M291EV PAL I colour signal VHR M291E PAL I I colour signal VHR M291IR Recording format PAL RF Out G VHR M271SP M261EV M291EV I VHR M291E M291IR RF Modulator UHF 22 68 Adjustable Input level VIDEO IN SCART type 1 0 Vp ...

Page 11: ...APE EJECT 13 CASSETTE COMPARTMENT 14 REW 15 PAUSE 16 FAST FORWARD 17 PLAY 18 REC 19 REMOTE CONTROL SENSOR 10 VCR DISPLAY 11 CHANNEL 11 MAINS LEAD 12 EURO AV2 VHR M271SP VHR M291IR VHR M291E ONLY 13 EURO AV1 14 RF OUT 1 2 3 4 6 5 7 8 10 11 9 F R O N T F R O N T 1 4 2 5 3 ...

Page 12: ...R B30902 CH TRACK i OK CLK COUNT CLEAR NUMBER buttons SAFE button POWER button TV VCR button CM CUT button SP LP button REC button FF button PLAY button CLEAR button VIDEO Plus button VHR M291E VHR M291IR VHR M291EV ONLY OK CLK COUNT button EJECT button REW button STOP button i button CURSORS button PAUSE button ...

Page 13: ...o No 1 Re assembly Flow 3 Place the unit like Fig 2 1 4 Check and replace Electrical parts NOTE 1 Insert Video Cassette Tape inversely like Fig 2 1 to check and replace defective parts 2 In disassembling and reassembling be careful not to damaged CST switch Timer C B A Main C B A Housing Deck Assembly Timer C B A Housing Deck Ass y Cassette Tape Upside Down Main C B A Positioned Upside Down ...

Page 14: ...23 A43 283 280 284 300 T U 7 0 1 T U N E R 2SCART 1SCART 320 452 452 452 A42 A49 250 462 462 457 457 457 457 457 457 A00 275 LED502 LED501 A 5 4 3 2 1 B C D NOTE Refer to SECTION 5 REPLACEMENT PARTS LIST in order to look for the part number of each part _ OPTIONAL PARTS ...

Page 15: ...ATTERY 808 806 PLUG ASS Y 2WAY Optional parts 812 PLUG ASS Y 1WAY Optional parts 811 REMOCON 900 PACKING RF 803 PACKING LF 803 BOX CARTON 802 BAG SOFR SHEET 804 INSTRUCTION MANUAL 801 SCART CABLE 821 NOTE Refer to SECTION REPLACEMENT PARTS LIST NOTE in order to look for the part number of each part ...

Page 16: ...AVCP Micom KEY BOARD 1 KEY BOARD 2 T U N E R OSC H S R VPS L D IC Drum Connector Secam W5J5 W5J4 H SW PG ADJ E2PROM C S M P S A V MAIN P C B Component Side Measurement point Adjustment point SECTION 3 ELECTRICAL ELECTRICAL ADJUSTMENT POINTS ARRANGEMENT ...

Page 17: ...the CH1 of the oscilloscope to the H SW W5J4 W5J5 and CH2 to the Video Out for the VCR c Trigger the mixed Video Signal of CH2 to the CH1 H SW W5J4 W5J5 and then check the distance time difference which is from the selected A B Head point of the H SW W5J4 W5J5 signal to the starting point of the vertical synchronized signal to 6 5H 0 5H 416µs 1H 64 0µs CONNECTION WAVEFORM V Out H SW W5J4 W5J5 VR50...

Page 18: ... 1 Is there DC voltage at the IC101 Pin 5 Is there about 2 5V at the IC103 Vref Is the D106 normal Check the Main PCB 5 3VA Line short Replace the F101 Use the same Fuse Replace the BD101 Replace the R101 Is Vcc about 13 15V permittable at the IC101 Pin 4 Check or Replace the D103 Replace the IC102 Replace the IC103 Replace the D106 NO YES YES YES YES YES YES YES YES NO NO NO NO NO NO NO ...

Page 19: ...oes 5 3VA work normally Check whether 5 3VA is out of order YES NO NO 7 Power Circuit SMPS 2 No 12VA Capstan 3 No 12VA CANAL Buffer Is Voltage about 12V put into the D160 Check or Replace the D160 YES YES No 12VA Is Vcc about 13VA put into the D160 Replace the Peripheral Circuitry of D160 YES NO ...

Page 20: ...s about 4 7V put into the Q152 Q151 Base Check the Q163 Q162 whether it works normally Check or Replace the Q152 Q151 YES YES No 5VT 5V Is the Q163 Q162 Base H Is 5 3VA put into the Q152 Q151 collector Check the µ com Control YES YES NO NO ...

Page 21: ...ear at IC501 pin 37 Does the CFG divide waveform appear at IC501 pin 40 Do the CTL pulses move when TRK is operated Replace IC501 Does the Video Envelope waveform appear at IC501 Pin 12 NO YES YES YES YES YES A Is the height of the CTL Head adjusted correctly NO Replace IC501 NO Check AVCP IC NO Adjust the CTL Head ...

Page 22: ...he Drum PWM waveform appear at IC501 Pin 26 Check the Components and foil Pattern Connected to IC501 Pin 26 PMD01 Pin 1 for shorts Do DFG Pulses appear at IC501 Pin 38 B NO NO NO NO Check Power Does Drum PWM appear at IC501 Pin 26 Do DFG Pulses appear at PMD01 Pin 3 Check Drum Monitor Ass y Check the Components and foil pattern between PMD01 Pin 3 and IC501 Pin 38 for shorts Replace IC501 YES YES ...

Page 23: ...ce IC501 Does 12VA appear at PMC01 Pin 5 Does 2 8V appear at PMC01 Pin 4 Check Connector and Capstan Motor Ass y Check the Components and foil Patterns Connected between IC501 Pin 25 and PMC01 Pin 4 for shorts Does the CFG signal appear at IC501 Pin 40 Does Capstan PWM appear at IC501 Pin 25 Check the components and foil pattern connected between IC501 Pin 25 and PMC01 Pin 4 for shorts C NO NO NO ...

Page 24: ...Motor Signal Do Take up reel pulses appear at the base of Q514 Replace the Take Up Reel Photocoupler in the Deck RS501 Auto stop Does SW30 waveform appear at IC501 Pin 24 Do Take up reel pulses appear at IC501 Pin 4 Change IC501 A NO NO NO NO YES 3 System Front Panel Circuit ...

Page 25: ...anism NOTE Auto stop may also be caused by lack of lubrication due to dried grease or oil Is 5 3V applied to R544 Check the power Change IC502 or ZD501 GDZJ 6 2C Check IC501 Pins 74 75 76 77 Check the CST SW and peripheral circuitry Check the power B NO NO NO YES NO NO YES Non working finction buttons Is the voltage of IC501 Pin 15 5V Does LED CLOCK display change when a function button is pressed...

Page 26: ...C501 Pin 45 Does the Video signal appear at the Emitter terminal of the Q701 Check the 5V Line Power Circuit Is I2 C BUS signal applied to the IC301 Pin 23 24 Check C316 AGC Chck the path of the signal between the IC301 Pin 29 and IC501 Pin 43 Replace the IC301 Does the 5V appear at the Emitter terminal of the Q701 Replace the Q701 Check the 5V Line Power Circuit Check the System Circuit Refer to ...

Page 27: ...heck the V H S W level Check R304 R340 Replace the IC301 Refer to SYSTEM I2 C BUS CHECK Trouble Shooting Is the V H S W signal applied to the IC301 Pin 11 Is V H S W H about 3 4V at the IC301 Pin 11 Clean the Drum Check the path of the Y Luminance RF signal Check Q302 Q303 Check the path of the Y Luminance RF signal Check the Q301 Does the Y Luminance RF signal appear at the IC301 Pin 17 Is the Y ...

Page 28: ... Check the line of the 5 2V Line Power Circuit Replace the X301 or the X302 Check the Color Pass Check the Q304 Replace the IC301 Check the Color Rotary Circuit IC501 pin 28 Check the Color Rotary level Check the R303 Does the X301 4 43MHZ or X302 3 58MHZ oscillate Check the circuit of the IC301 35 62 Does the Color signal appear at the IC301 Pin 61 Is Color Rotary H about 1 6V Replace the IC301 N...

Page 29: ... the System of REC H the IC501 Pin 79 the D301 Replace the IC301 Check the line of the 5 2V Line Power Circuit Check PB Mode Is the REC H signal about 4V applied to the IC 301 Pin 30 Check the circuit of the IC301 Pin 90 92 94 Check REC Luminance Pass Color Pass Does PB Mdoe operate normally Does the REC RF signal appear at the IC301 Pin 90 Check the Drum Drum Connector YES YES YES YES YES NO NO N...

Page 30: ...0 Is 30VT applied to TU701 Pin 16 Is 5VT applied to TU701 Pin 13 Does the Clock signal appear at TU701 Pin 11 Does the data signal appear at TU701 Pin 12 Replace Tuner Check the signal flow from TU701 Pin 24 to IC301 Pin 38 Does Sync appear at IC501 Pin54 Check the signal flow from IC501 Pin45 to JK901 Pin19 YES YES YES YES YES YES YES NO NO NO NO NO Check the liC Data signal of µ com Pin 91 NO ...

Page 31: ...Check the Tuner Audio signal at IC301 Pin 76 Check the Audio signal at IC301 Pin 96 Check 5VT power Chekc the signal flow from TU701 Pin21 to IC301 Pin 76 Replace IC301 NO NO NO YES YES YES Check the signal flow from IC301 pin 96 to IC901 Pin 6 YES 3 16 ...

Page 32: ...ensor TIMER H D152 D151 D160 SNUBBER BLOCK IC101 R109 C135 D103 R103 C109 R125 R126 D102 R104 C105 C106 D109 C120 L104 C121 NOTES Symbol denotes AC ground Symbol denotes DC chassis ground FROM µ COM FROM µ COM P CTL H LINE FILTER BLOCK C101 L102 C102 RECTIFIER SMOOTHING D105 C115 36V S W BLOCK Q154 R157 R158 R155 5VT SW BLOCK Q152 R153 R154 D156 5V S W BLOCK PWR CTL BLOCK Q163 Q151 R151 R152 Q162 ...

Page 33: ...3 19 3 20 2 Tu IF NICAM A2 Block Diagram From Power WITHOUT ...

Page 34: ... ROTARY 88 57 74 59 52 54 51 61 72 71 15 21 46 45 43 41 91 93 10 18 17 21 20 23 24 28 29 11 PB RF IC301 LA71598M IC201 TA1238F SP REC IC 301 LA71598M COLOR ROTARY V II S W CLOCK DATA C SYNC REC H V OUT TO MICOM TO DRUM 90 71 72 61 51 52 54 57 59 46 45 43 41 38 36 34 32 31 30 29 28 24 23 19 18 11 10 REC FM EQ FM MOD W D CLIP MAIN EMPH AGC FBC NL EMPH DETAIL ENH Y LPF YNR BPF1 C COMB BPF Y DELAY COM...

Page 35: ...4 System Block Diagram 3 23 3 24 ...

Page 36: ... 1 3 IC901 From Tuner Tuner V IN V OUT To AVCP V IN From µ COM Scart 2 V IN S2 V IN S1 V IN Scart 1 V IN Scart 1 V OUT Scart 2 V OUT R P HEAD IC301 HA118717NF L A IN 1 76 L A IN 3 80 L A IN 2 78 VCA DET REC AMP AMP 7 96 TO MOD LINE OUT PB EQ AMP 4 R P HEAD PB AUDIO IN ...

Page 37: ...VA are 12VT D109 C120 are defective Q152 is defective No 5 2VT IC102 IC103 are defective Power dead NOTE 1 Shaded parts are critical for safety Replace only with specified part number 2 Voltages are DC measured with a digital voltmeter during TUNER mode Base Collector Emitter PB REC PB REC PB REC 12 5 10 0 26 6 15 0 11 6 27 8 14 8 11 8 27 3 11 8 9 3 27 9 11 9 9 4 27 3 Q151 Q152 Q514 12 4 9 9 27 0 ...

Page 38: ...93 1 68 4 98 1 49 1 68 2 34 5 01 3 08 1 98 1 18 3 01 2 42 2 42 2 44 2 35 0 88 2 34 2 34 0 0 0 93 1 68 2 60 1 52 1 38 2 32 5 02 0 15 2 45 2 45 3 05 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 29 30 31 32 33 34 35 36 37 38 39 40 2 41 0 4 48 4 19 1 69 0 05 0 34 0 34 1 78 1 10 2 97 1 45 1 81 3 25 1 82 4 79 1 81 4 10 5 00 2 52 0 4 52 4 23 1 69 0 06 0 34 0 34 1 84 4 57 2 9...

Page 39: ... Q501 _ _ System IC Voltage Sheet IC503 1 5 PB REC 5 34 5 34 0 00 0 00 4 60 5 21 4 60 5 21 PB REC 0 00 0 00 0 00 0 00 0 00 0 00 0 00 0 00 _ _ IC503 Voltage Sheet PB REC PB REC PB REC PB REC PB REC 0 0 0 78 H L H L 3 34 1 1 3 2 2 2 0 74 4 0 5 28 5 28 5 28 5 24 0 0 5 18 5 18 0 0 0 79 H L H L 3 3 2 2 1 62 2 2 0 2 3 5 28 5 28 5 28 5 28 0 0 5 18 5 18 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 2...

Page 40: ... 42 43 Pins are defective IC901 MM1443 5 10 15 30 25 20 PB REC 0 0 4 8 4 8 4 7 4 7 3 8 3 8 1 5 1 5 1 5 1 5 3 3 3 3 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 0 0 PB REC 2 7 2 7 11 6 11 6 2 7 2 7 11 6 11 6 3 5 3 5 5 5 5 5 5 5 5 5 5 5 5 5 0 0 5 5 5 5 11 7 11 7 5 5 5 5 0 0 5 5 5 5 0 0 5 5 5 5 0 0 IC901 Voltage Sheet ...

Page 41: ...5 SHUTTLE KEY Circuit Diagram 3 37 3 38 ...

Page 42: ... 40 LOCATION GUIDE PG ADJ PRINTED CIRCUIT BOARD DIAGRAMS 1 MAIN P C Board ABBREVIATIONS ADJ Adjustment PG Pulse Generator NOTE Measurement Point Adjustment Point Emitter TRANSISTOR Collector Base Solder Side ...

Page 43: ...3 41 3 42 2 KEY 1 P C Board LOCATION GUIDE Solder Side 3 KEY 2 P C Board LOCATION GUIDE Solder Side ...

Page 44: ... Alignment Check 4 15 2 Deck Preparation for Adjustment 4 17 3 Checking Torque 4 17 4 Guide Roller Height Adjustment 4 18 4 1 Preliminary Adjustment 4 18 4 2 Precise Adjustment 4 18 5 Audio Control A C Head Adjustment 4 19 5 1 Preliminary Adjustment 4 19 5 2 Confirmation of Tape Path between Pinch Roller and Take up Guide 4 20 5 3 Precise Adjustment Azimuth Adjustment 4 20 6 X Value Adjustment 4 2...

Page 45: ... 2 2 3 4 5 Bracket Side L 1 Screw A 2 2 3 4 6 Bracket Assembly Door 1 Screw A 2 2 3 4 5 6 7 Arm Assembly F L Chassis Hole A 2 2 3 4 5 8 Lever Assembly S W Chassis Hole A 2 9 Arm Assembly Cleaner Chassis Embossing A 3 10 Head F E 2 Hooks A 3 11 Base Assembly A C Head 1 Screw A 3 12 Brake Assembly S Chassis Hole A 4 2 3 13 Brake Assembly T Chassis Hole A 4 2 3 12 14 Arm Assembly Tension Chassis Hole...

Page 46: ...Bracket Assembly Door 1 Screw A 2 2 3 4 5 6 7 Arm Assembly F L Chassis Hole A 2 2 3 4 5 8 Lever Assembly S W Chassis Hole A 2 9 Arm Assembly Cleaner Chassis Embossing A 3 10 Head F E 2 Hooks A 3 11 Base Assembly A C Head 1 Screw A 3 12 Brake Assembly S Chassis Hole A 4 2 3 13 Brake Assembly T Chassis Hole A 4 2 3 12 14 Arm Assembly Tension Chassis Hole A 4 2 3 12 14 15 Reel S Chassis Shaft A 4 2 3...

Page 47: ...is and separate the Cap FPC 2 Remove three Screws S1 and lift up the Drum Assembly 3 Remove two Screws S2 and Separate the Stator of Drum Motor 4 Remove two Screws S3 and Separate the Rotor of Drum Motor from the Drum Sub Assembly 1 When reassembling Cap FPC two Holes of Drum FPC are inserted to the two Bosses of Holder FPC correctly Refer to Fig B 1 Fig A 1 NOTE Fig A 1 1 Fig A 1 1 Fig B 1 Holder...

Page 48: ...Assembly F L Lever Assembly S W Bracket Side L H5 H3 Groove Guide CST Gear Rack F L Groove For Jog Shuttle Models H4 Bracket Assembly Door S4 S4 Arm F L Holder Assembly CST Lever Stopper R Fig A 2 Fig A 2 1 Fig A 2 2 Fig A 2 6 Fig A 2 7 Fig A 2 5 Fig A 2 3 Fig A 2 4 ...

Page 49: ... above No 1 and disassemble the Guide CST in the direction of the arrow 5 Bracket Side L Fig A 2 4 Bracket Assembly Door Fig A 2 5 1 Remove the Screw S4 and disassemble the Bracket Side L in the front 2 Remove the Screw S4 and disassemble the Bracket Assembly Door in the front 6 Arm Assembly F L Fig A 2 6 1 Push the Arm Assembly F L to the left and lift up it 1 When reassembling confirm that the G...

Page 50: ...in the clockwise direction and lift up the Arm Assembly Cleaner 9 Head F E Fig A 3 2 1 Unhook the two Hooks H1 on the back side of the Chassis and lift up the Head F E 10 Base Assembly A C Head Fig A 3 3 1 Remove the Screw S5 and lift up the Base Assembly A C Head NOTE H1 Head F E Arm Assembly Cleaner A S5 Base Assembly A C Head For Jog Shuttle Models Fig A 3 Fig A 3 1 Fig A 3 3 Fig A 3 2 Spring L...

Page 51: ... direction and then lift up the Brake Assembly T 1 When reassembling be careful not to change the Spring with above No 11 Refer to Fig B 2 13 Arm Assembly Tension Fig A 4 3 1 Remove the Spring Tension 2 Hold the C part shown above Fig A 4 3 and turn to the clock wise direction and then lift up theArmAssembly Tension 1 When reassembling be careful not to change the Spring with above No 11 12 Refer ...

Page 52: ...bossing of the Chassis in the counterclockwise direc tion and lift up the Base Assembly P4 17 Opener Lid Fig A 5 3 1 Break away the C Part of the Opener Lid from the Embossing of the Chassis in the Clockwise direction and lift up the Opener Lid 18 Arm Assembly T up Fig A 5 4 1 Just lift up the Arm Assembly T UP 1 When reassembling confirm the opener lid is placed on the Hook H1 of the Arm Assembly...

Page 53: ... Capstan 1 When reassembling Confirm the A B parts of Motor Capstan is located to the A B of the Chassis 21 Clutch Assembly D33 K Fig A 6 3 1 Remove the Washer W1 and lift up the Clutch Assembly D33 K 22 Lever F R Fig A 6 4 1 Unhook the H1 shown above Fig A 6 4 and lift up the Lever F R 1 When reassembling move the C part of the Lever F R up and down then confirm if it is returned to original posi...

Page 54: ...w S4 and lift up the Bracket Assembly Jog 25 Guide Rack F L Fig A 7 2 Gear Rack F L Fig A 7 3 1 Remove the Screw S4 and lift up the Guide Rack F L 2 Lift up the Gear Rack F L 26 Brake Assembly Capstan Fig A 7 4 4HD model option 1 Hook the Spring Capstan on the Hook H1 2 Unhook the Hook H2 and lift up the Brake Assembly Capstan Refer to Fig to the right 1 When reassembling confirm that the Hole A o...

Page 55: ...3 Lift up the Gear Connector 1 When reassembling confirm that the Hole A of the Gear Connector is aligned to the Hole A of the Chassis Fig A 8 3 2 When reassembling confirm that the Hole B of the Gear Cam is aligned to the Hole B of the Chassis Fig A 8 2 3 When reassembling confirm that the C part of the Gear Cam is aligned to the D part of the Gear Drive as shown Fig B 3 28 Bracket Assembly L D M...

Page 56: ... 2 Plate Slider Fig A 9 3 Lever Tension Fig A 9 4 1 Remove the Screw S4 and lift up the Base Tension 2 Lift up the Plate Slider 3 Hold the A Part of the Lever Tension and turn to the counterclockwise direction and then lift up the Lever Tension 1 When reassembling turn the Lever Tension to the clock wise direction in maximum 2 Push the plate slide right side to be guided by the shaft NOTE Fig A 9 ...

Page 57: ... 10 4 1 Move the Base Assembly P3 in the direction of the arrow of the Chassis Hole A and push down the BaseAssembly P3 2 Move the Base Assembly P2 in the direction of the arrow of the Chassis Hole B and push down the BaseAssembly P2 33 Arm Assembly Idler or Arm Assembly Idler Jog Fig A 10 5 1 Unhook the Hook H3 and push down the Arm Assembly Idler Jog 1 Arm Assembly Idler is for Normal Models 2 A...

Page 58: ...00 D006 4 Torque gauge adaptor Parts No D09 R001 5 Post height adjusting driver Parts No DTL 0005 6 Type driver ø 5 2 Alignment tape Parts No NTSC DTN 001 PAL DTN 0002 3 Torque gauge 3 600g Cm ATG 3 Parts No D00 D002 SRK VIDEO CASSETTE TORQUE METER VHT 303 S R K V H T S SRK V HT T 300 250 200 150 50 0 300 250 200 150 50 0 100 ...

Page 59: ... until the Alignment is as below Fig C 2 4 Remove the Screw which fixes the Deck Mechanism and Main Frame and confirm if the Gear Cam is aligned with the Gear Drive as below Fig C 1 A 5 Confirm if the Mode S W on the Main P C Board is aligned as below Fig C 1 B 6 Remount the Deck Mechanism on the Main P C Board and check each operation Mode S W Gear Cam Gear Drive A B L D Motor Assembly Gear Cam H...

Page 60: ...ise until the Alignment is as below Fig C 2 4 Remove the Screw which fixes the Deck Mechanism and Main Frame and confirm if the Gear Cam is aligned with the Gear Drive as below Fig C 1 A 5 Confirm if the Mode S W on the Main P C Board is aligned as below Fig C 1 B 6 Remount the Deck Mechanism on the Main P C Board and check each operation Mode S W Gear Cam Gear Drive A B L D Motor Assembly Gear Ca...

Page 61: ... Adaptor with the Torque Gauge affixed The Torque reading to measure occurs when the Tape abruptly changes direction from Fast Forward of Rewind Mode when quick bracking is applied to both Reels SRK VIDEO CASSETTE TORQUE METER VHT 303 S R K V H T S SRK V HT T 300 250 200 150 50 0 300 250 200 150 50 0 100 Test Equipment Fixture Torque Gauge 600g cm ATG Torque Gauge Adaptor Cassette Torque Meter SRK...

Page 62: ...velope CH 2 NTSC SW 30Hz PAL SW 25Hz Head Switching Output Point RF Envelope Output Point Test Conditions VCR VCP State Play an Alignment Tape Adjustment Point Guide Roller Height Adjustment Screws Fig C 4 2 Fig C 4 3 P3 POST ADJUSTMENT P2 POST ADJUSTMENT Turn the Roller Guide Height Adjustment Screw slightly to flatten the waveform Tracking control at center RF ENVELOPE OUTPUT TEST POINT OSCILLOS...

Page 63: ...Screw Fig C 5 3 A C Head Tape Tape 0 2 0 25mm P4 5 1 Preliminary Adjustment Height and Tilt Adjustment Perform the Preliminary Adjustment when there is no Audio Output Signal with the Alignment Tape 1 Initially adjust the Base Assembly A C Head as shown Fig C 5 1 by using the Height Adjustment Screw B 2 Play a Blank Tape and observe if the Tape passes accu rately over the A C Head without Tape Cur...

Page 64: ...ly adjust the Azimuth Adjustment Screw A and the Tilt Adjustment Screw C for Maximum Output of the 1Khz and 7Khz segments while maintaining the flattest Envelope differential between the two Frequencies Adjustment Procedure 5 3 Precise Adjustment Azimuth adjustment 6 X Value Adjustment Fig C 5 4 1KHZ Oscilloscope Alignment tape SP only Screw Driver Type 5mm CH 1 PB RF Envelope CH 2 NTSC SW 30Hz PA...

Page 65: ...hanism Condition Play the blank tape Play an alignment tape Adjustment Points Guide Roller Precise Adjustment Switching Point Tracking Preset X Value Checking Adjustment Procedure Play a blank tape and check for tape curling or creasing around the roller guide If there is a problem then follow the procedure 4 Guide Roller Height and 5 Audio Control A C Head Adjustment RF ENVELOPE OUTPUT TEST POINT...

Page 66: ... head Dirt on pinch roller If locations marked with o do not operate normally after cleaning check for wear and replace See the EXPLODED VIEWS at the end of this manual as well as the above illustrations See the Greasing Page 4 22 for the sections to be lubricated and greased NOTE o o o o Dirt on video head Dirt on tape transport system Low volume Sound distorted Tape does not run Tape is slack o ...

Page 67: ...rol head Dirt on pinch roller If locations marked with o do not operate normally after cleaning check for wear and replace See the EXPLODED VIEWS at the end of this manual as well as the above illustrations See the Greasing Page 4 22 for the sections to be lubricated and greased NOTE o o o o Dirt on video head Dirt on tape transport system Low volume Sound distorted Tape does not run Tape is slack...

Page 68: ...tch with Isopropyl Alcohol Touch the cleaning patch to the head tip and gently turn the head rotating cylinder right and left Do not move the cleaning patch vertically Make sure that only the buckskin on the cleaning patch comes into contact with the head Otherwise the head may be dam aged Thoroughly dry the head Then run the test tape If lso propyl Alcohol remains on the video head the tape may b...

Page 69: ...ssembly F L U Groove 4 Arm Take up Rubbing Section 5 L D Motor Worm Wheel Part 6 Shaft 7 Arm Assembly F L of Buming Inside Hole 8 Reel S T Shaft G381 Yellow 9 Brake T Groove Guide Rail Gear Assembly Up D Gear Drive Gear Sector Gear Cam Press Cam Part Cam Part Gear Part Stopper Part Bracket Side L Bracket Assembly Door 1 4 5 7 6 3 2 1 Loading Path Inside Top side 2 Shaft 3 Gear Rack F L Moving Sect...

Page 70: ...d sensor Check syscon circuit NO YES YES YES NO NO NO 1 Deck Mechanism A NO NO NO No F R modes Is the present mode F R Mode Is the mode SW assembled correctly refer to Pages 4 14 Is the normal voltage supplied to the Capstan Motor Vcc1 Vcc2 Does terminal voltage Vctl of Capstan Motor supply side more than 4V Check Servo Power Circuits Replace the Capstan Motor Does the Capstan Motor rotate Do the ...

Page 71: ...tions page 4 14 Check spring Pinch Replace Drum Motor Check Servo Syscon Check the Syscon µ COM No cassette loading Insert the cassette Check Cassette Carry Assembly Is there variation for F L S W Output In Tape with REC Tab L H L In Tape without REC Tab L H L H Does the F L S W work normally Does the lever S W work normally Check Syscon Circuit Check Syscon Circuit Replace F L S W YES YES YES YES...

Page 72: ...ensors ok Check Syscon Circuit Check Syscon Circuit Check Servo Syscon Does the Capstan Motor turn Is the terminal voltage of the Drum Motor more than 2 3V Replace the Drum Motor Is the Vcc voltage of the Drum Motor normal Check the clutch and the Idler Assembly YES YES YES YES YES YES YES YES NO NO NO NO NO Is the terminal voltage of Capstan Motor supplied more than 4V Replace the Capstan Motor I...

Page 73: ...Board 5V YES Is there a short circuit between cassette switch and GND on main P C Board Remove the short circuit part or Replace the main P C Board NO Check Mode switch location and syscon circuit Replace F L Switch YES NO YES NO NO Replace F L Switch NO NO Cassette will not eject Does the L D motor rotate in reverse Check L D Motor or Drive IC Replace lever Switch Does the Lever Switch work YES N...

Page 74: ...m Assembly F L Check the power of L D Motor Is the Holder Assembly Cassette assembled correctly Replace the Rear Rack F L Does the Gear Rack F L work Does the Opener Door work Does the Arm Assembly F L work Does the L D Motor work Does the Holder Assembly Cassette move the Arm Assembly F L Replace the Front Loading Mechanism Assembly YES YES YES YES NO NO NO YES NO YES NO YES NO C ...

Page 75: ...EXPLODED VIEWS 4 31 101 426 103 117 104 105 100 110 115 116 112 113 114 032 109 108 426 A22 A23 A21 A24 107 106 1 Front Loading Mechanism Section ...

Page 76: ...13 022 015 401 401 A01 007 006 A03 009 025 026 027 A04 011 031 018 019 021 020 029 003 004 409 016 O p t i o n a l P a r t s O p t io n a l P a r t s O n l y f o r V C R M o d e l s 2HD Model Only Optional Parts Only for Jog shuttle Models For Normal Models 2 Moving Mechanism Section 1 ...

Page 77: ... 072 078 A12 A13 067 066 065 A11 068 069 070 079 426 064 518 052 055 518 517 061 062 062 060 063 519 051 O p ti o n a l P a r ts O n ly f o r N o m a l M o d e ls O n ly f o r H i R e w in d M o d e ls Optional Parts Only for Jog Shuttle Models 3 Moving Mechanism Section 2 ...

Page 78: ... O O SUPPORTER CST 4980R 0010A 024 645 045 0426 O O O O O ARM ASSY IDLER 4261R 0013A 025 645 045 1065 O O O O O BRACKET L D MOTOR NSP 4810R 0066A 026 645 045 1058 O O O O MOTOR ASSY L D NSP 4681R 0008A 026 645 048 0713 O MOTOR ASSY L D SAMHONGSA NSP 4681R 0008B 027 645 045 0495 O O O O O GEAR WHEEL NSP 4470R 0025A 028 645 045 0907 O O O O O REEL T 4408R 0002B 029 645 047 5412 O O O O ARM ASSY PINC...

Page 79: ...80 645 048 0522 O O PANEL VIDEO FRONT CCY210 1TP B W O AV CLOC NSP 3720R F123K 280 645 048 0539 O PANEL VIDEO FRONT CCY218TP B W O AV CLOCK NSP 3720R F123L 283 645 048 0454 O DOOR CST CCY219TI TF VHR M291 B589 3580R V010N 283 645 048 0461 O DOOR CST CCY211TP VHR M271 B589G 1 3580R V010P 283 645 048 0478 O DOOR CST CCY210TP VHR M261EV B589G 3580R V010Q 283 645 048 0485 O DOOR CST CCY218TP VHR M291E...

Page 80: ...0CE1064F638 C323 645 047 9984 O O O O O CAPACITOR TUBULA T C 33P 50V J SL TA26 0CX3300K408 C324 645 047 3753 O O O O O CAPACITOR TUBULA HIGH DIELE 0 01M 16V M Y TA26 0CN1030F678 C325 645 047 3548 O O O O O CAPACITOR ELECTROLYTIC 10M SRA 16V M FM5 TP 5 0CE1064F638 C326 645 047 3548 O O O O O CAPACITOR ELECTROLYTIC 10M SRA 16V M FM5 TP 5 0CE1064F638 C327 645 047 3548 O O O O O CAPACITOR ELECTROLYTIC...

Page 81: ...61 645 047 3548 O O O O O CAPACITOR ELECTROLYTIC 10M SRA 16V M FM5 TP 5 0CE1064F638 C564 645 047 3845 O O O O O CAPACITOR TUBULA HIGH DIELE 330P 50V K B TA26 0CN3310K518 C567 645 047 3746 O O O O O CAPACITOR TUBULA HIGH DIELE 1000P 50V K B TA26 0CN1020K518 C570 645 047 3487 O O O O O CAPACITOR CERAMIC TEMP COMP 15P 50V J NP0 TS 0CC1500K415 C571 645 047 3487 O O O O O CAPACITOR CERAMIC TEMP COMP 15...

Page 82: ...7 O O O O O DIODE RECTIFIER RL104 R TP GULF SEMICONDUCTOR 0DR104009AB D301 645 047 4026 O O O O O DIODE SWITCHING 1SS133 DETECT SW TP 0DD133009AA D509 645 047 4026 O O O O O DIODE SWITCHING 1SS133 DETECT SW TP 0DD133009AA D901 645 047 4026 O O DIODE SWITCHING 1SS133 DETECT SW TP 0DD133009AA D902 645 047 4026 O O O DIODE SWITCHING 1SS133 DETECT SW TP 0DD133009AA FUSE HOLDER ES501 645 044 0748 O HOL...

Page 83: ...CONNECTOR GP390 LGC 3P 3 96 STRAIGHT SN 561 292B PWB ASSEMBLY PBM00 645 048 1048 O PWB PCB ASSY TOTAL CCY219TF EVNT 6871R 1291D PBM00 645 048 1093 O PWB PCB ASSY TOTAL CCY210TP NA3GS 6871R 2418M PBM00 645 048 1109 O PWB PCB ASSY TOTAL CCY211TP NA6SS 6871R 2418N PBM00 645 048 1116 O PWB PCB ASSY TOTAL CCY218TP NA3GS 6871R 2418P PBM00 645 048 1123 O PWB PCB ASSY TOTAL CCY219TI NA4US 6871R 2418Q TRAN...

Page 84: ...F408 R121 645 047 4415 O O O O O RESISTOR FIXED CARBON FILM 180 OHM 1 6 W 5 00 TA26 0RD1800F608 R125 645 047 4590 O O O O O RESISTOR FIXED CARBON FILM 4 7K OHM 1 6 W 5 00 TA26 0RD4701F608 R126 645 047 4323 O O O O O RESISTOR FIXED CARBON FILM 1K OHM 1 6 W 5 00 TA26 0RD1001F608 R151 645 047 4323 O O O O O RESISTOR FIXED CARBON FILM 1K OHM 1 6 W 5 00 TA26 0RD1001F608 R152 645 047 4613 O O O O O RESI...

Page 85: ...ARBON FILM 1K OHM 1 6 W 5 00 TA26 0RD1001F608 R521 645 047 4392 O O O O O RESISTOR FIXED CARBON FILM 1 5K OHM 1 6 W 5 00 TA26 0RD1501F608 R522 645 047 4323 O O O O O RESISTOR FIXED CARBON FILM 1K OHM 1 6 W 5 00 TA26 0RD1001F608 R523 645 047 4545 O O O O O RESISTOR FIXED CARBON FILM 3 3K OHM 1 6 W 5 00 TA26 0RD3301F608 R524 645 047 4705 O O O O O RESISTOR DRAWING 6 8 OHM 1 W 5 00 TR 0RF0681J619 R52...

Page 86: ...ISTOR FIXED CARBON FILM 220 OHM 1 6 W 5 00 TA26 0RD2200F608 R7M1 645 047 4323 O O O O O RESISTOR FIXED CARBON FILM 1K OHM 1 6 W 5 00 TA26 0RD1001F608 R7M2 645 047 4453 O O O O O RESISTOR FIXED CARBON FILM 220 OHM 1 6 W 5 00 TA26 0RD2200F608 R7M3 645 047 4422 O O O O O RESISTOR FIXED CARBON FILM 1 8K OHM 1 6 W 5 00 TA26 0RD1801F608 R7M4 645 047 4422 O O O O O RESISTOR FIXED CARBON FILM 1 8K OHM 1 6...

Page 87: ...T THVV502GAA POSTECH NON 12V 5A 556 219B SW5V2 645 047 5511 O O O O O SWITCH TACT THVV502GAA POSTECH NON 12V 5A 556 219B TRANSISTOR TU RESONATOR CRYSTAL X TAL T101 645 048 0904 O O O O O TRANSFORMER SMPS SJE 015G SHT 015G SJ SH CS LSE 642 015G VR501 645 047 5580 O O O O O RESISTOR SEMI FIXED RH063MCJ5R 220K 613 032W X301 645 048 0812 O O O O O CRYSTAL STANDARD H49U KJE RADIAL 4 433709MHZ 15 6202R2...

Page 88: ...70 V P V ...

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