Sharp VC-S2000HM Service Manual Download Page 27

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VC-S2000HM

2. Synchro Gear, Drive Gear L and Drive Gear R

ASSEMBLY OF CASSETTE HOUSING

1. Drive Gear and R Drive angle ass’y

Figure 4-47.

MSPRT0381GEFJ

Apply grease

LANGF9592GEFW

Top surface should be free from scratches or soil.

Drive angle

Drive gear R

Frame

Figure 4-48.

Summary of Contents for VC-S2000HM

Page 1: ...RT AND TROUBLESHOOTING GUIDE 31 7 ELECTRICAL TROUBLESHOOTING 37 8 BLOCK DIAGRAM 53 9 SCHEMATIC DIAGRAM AND PWB FOIL PATTERN 63 10 REPLACEMENT PARTS LIST 81 11 EXPLODED VIEW OF MECHANICAL PARTS 92 12 PACKING OF THE SET 96 SHARP CORPORATION MODEL 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 identi...

Page 2: ...e mechanism and its PWB in position in the main frame 1 Start and end sensors Q701 and Q702 Insert the sensor s projection deep into the upper hole of the holder Referring to the PWB fix the sensors tight enough 2 Photocoupler IC901 and IC902 Refer to the symbol on the PWB and the anode marking of the part 3 Cam switches A and B D708 and D705 Adjust the notch of the part to the white marker of the...

Page 3: ...1 5W max at Low power mode Operating temperature 5 C to 40 C Storage temperature 20 C to 55 C Weight Approx 4 3 kg Dimensions 430 mm W x 300 mm D x 91 5 mm H VIDEO Input 1 0 Vp p 75 ohm Output 1 0 Vp p 75 ohm Horizontal resolution 250 lines SP mode AUDIO 0 dBs 0 775 Vrms Input Line1 3 8 dBs 10k ohm Line 2 3 8 dBs 10k ohm Line 3 3 8 dBs 47k ohm Output Line1 3 8 dBs 1k ohm Line 2 3 8dBs 1k ohm Hi Fi...

Page 4: ...emove 3 screws 4 OPERATION L Take it out of connector 5 3 clips PWB 6 and 2 clips 7 OPERATION R Remove 3 clips 9 PWB FUNCTION PWB Remove 4 connectors 0 TERMINAL PWB Remove 3 screws q 1 screw w 1 screw e and 2 connector r MECHANISM Remove 2 screws t 2 screws y MAIN PWB 2 screws u and 1 hook i ANTENNA Remove 1 screw o TERMINAL COVER TOP CABINET FRONT PANEL OPERATION L PWB OPERATION R PWB PWB HOLDER ...

Page 5: ...cts the PWB and the mechanism Take out vertically the mechanism so that it does not damage the adjacent parts 2 2 DISASSEMBLING THE MECHANISM MAIN PWB ASSEMBLY 2 Removing the mechanism and cassette housing Remove 2 screws 3 fixing the cassette housing to the mechanism and remove the cassette housing 1 2 3 ...

Page 6: ... the mechanism the initial setting is essential condition There are two initial setting methods namely electrical and mechanical 1 Electrical initial setting So as to perform initial setting of mechanism execute the Step 1 of Installation of cassette housing After ascertain ing the return to the initial setting position 1 install the 2 3 CARES WHEN REASSEMBLING INSTALLING THE MECHANISM ON PWB Lowe...

Page 7: ...lever ass y 6 Supply reel disk 7 Supply main brake ass y 8 Take up main brake ass y 9 Pinch drive cam 10 A C Head ass y 11 Reverse guide lever ass y 12 Casecon drive gear 13 Take up reel disk 14 Pinch roller lever ass y 15 Drum ass y 16 Loading motor 17 Drum motor 18 Take up pole base ass y 17 15 10 11 5 9 14 12 8 16 13 4 6 2 7 3 1 18 17 15 10 11 5 9 14 12 8 16 13 4 6 2 7 3 1 18 ...

Page 8: ...N OF MAJOR MECHANICAL PARTS BOTTOM VIEW 26 24 21 22 19 20 12 23 No Function No Function 19 Slow brake 20 Master cam 21 Capstan D D motor 22 Reel belt 23 Clutch lever 24 Limiter pulley ass y 12 Casecon drive gear 26 Shifter ...

Page 9: ...ing and adjusting the reel disk height When fixing any part to the threaded hole using resin with screw use the jig Specified torque 5 kg This cassette torque meter is used for check ing and adjusting the torque of take up for measuring tape back tension These Jigs are used for checking and adjusting the torque of take up and supply reel disks Master Plane Jig and Reel Disk Height Adjusting Jig Pi...

Page 10: ...ole on pole base Full erase head A C head Upper and lower drum ass y Capstan D D motor Pinch roller Reel belt Tension band ass y Loading motor Idler ass y Limiter pulley Supply take up main brake levers AHC Automatic Head Cleaner color and beating Small sound or sound distortion Poor S N ratio no color Poor flatness of the envelope with alignment tape No tape running uneven color No tape running t...

Page 11: ...tool do not contact the guide pin or drum 5 After installing the cassette housing control once per form cassette loading operation TO RUN A TAPE WITHOUT THE CASSETTE HOUSING CONTROL ASSEMBLY 1 Remove the full surface panel 2 Short circuit TP801 3 Plug in the power cord 4 Turn off the power switch The pole bases move into U L position 5 Open the lid of a cassette tape by hand 6 Hold the lid with tw...

Page 12: ... brake surface 2 After reassembly check the video search rewind back tension see page 15 and check the brake torque see page 17 Height checking and adjustment Note 1 Set the master plane with due care so that it does not contact the drum 2 When putting the master plane shift the reverse guide a little in the loading direction Care must be taken since excessive shift results in damage Figure 4 6 No...

Page 13: ...uiting TP801 provided at the center facing to the main PWB plug in the power cord Setting 1 Set a torque gauge to zero on the scale Place it on the take up reel disk 2 Press the FF button 3 To calculate the remaining capacity of the play back mode slowly rotate the supply reel disk and then shift it into the forward mode Checking 1 Turn the torque gauge slowly one rotation every 2 to 3 seconds by ...

Page 14: ...nterclockwise very slowly one rotation every 1 to 2 seconds and check that the torque is within the set value 14 0 3 9mN m 144 40gf cm Figure 4 11 Torque gauge Supply reel disk Note Surely put the torque gauge on the reel disk to measure If the torque gauge is raised accurate measurement is impossible Adjustment If the rewinding playback winding up torque is not within the setting replace the limi...

Page 15: ...RCH REWIND BACK TENSION Remove the cassette housing control assembly After short circuiting TP801 provided at the center facing to the main PWB plug in the power cord Checking 1 After pressing the play button press the rewind button and set the video search rewind mode 2 Place the torque gauge on the take up reel disk and turn it counterclockwise very slowly one rotation every 2 to 3 seconds and c...

Page 16: ...HECKING AND ADJUSTMENT OF RECORD PLAYBACK BACK TENSION Remove the cassette housing control assembly After short circuiting TP801 provided at the center facing to the main PWB plug in the power cord Setting 1 Turn off the power switch 2 Open the torque cassette meter and fix with tape 3 Set the cassette tape in loading state 4 Put the weight 500g on the cassette torque meter 5 Turn on the power swi...

Page 17: ...0gf cm Figure 4 20 CHECKING THE BRAKE TORQUE Checking the brake torque at the supply side CCW 2 9 9 8mN m 30 100gf cm CW 4 9 13 7mN m 50 140gf cm Figure 4 21 Tension arm Tension spring CW CCW CW Supply reel disk Torque gauge Torque gauge CCW Take up reel disk A B Remove the cassette housing control assembly After short circuiting TP801 provided at the center facing to the main PWB plug in the powe...

Page 18: ...ding state unplug the power cord Removal 1 Remove the screws123 Azimuth screw Tilt screw 2 Unsolder the PWB fitted to the A C head Notes 1 When replacing never touch the head If you touched clean with the cleaning liquid 2 When removing the screw 3 take care so that the spring may out New A C head ass y A C head PWB 2 Spring 1 Solder Never touch the head 10 8mm 10 8mm Azimuth screw Height screw Ti...

Page 19: ...everse guide height adjustment jig in tape loading state Refer to Figure 4 28 a b Figure 4 29 3 Set the tape and check for tape crease near the reverse guide in the playback mode If crease is found turn the reverse guide adjustment nut to remove crease As for crease check refer to Figure 4 30 a b Figure 4 28 2 Rotate counterclockwise the reverse guide height ad justment nut 1 10 turn For height ad...

Page 20: ... tape crease appears once at the flange and then return the tilt screw so that the crease disappears 2 If there is tape crease Turn counterclockwise the tilt screw so that the tape crease disappears Reference If the tilt screw is turned clockwise crease appears at the lower flange Guide roller Weight of 500g Cassette Tape 2 Adjustment of A C head height and azimuth 1 Perform the initial setting of...

Page 21: ...ck switching point Refer to the electric adjustment method 6 Playback the self picture recorded tape and check the flatness of envelope waveform and sound Notes When the A C head X value adjustment is performed be sure to perform at first X value rough adjustment refer to Page 20 3 2 Take up side Supply side Take up side Adjustment Supply side Supply side guide roller rotated in clockwise directio...

Page 22: ...removing the mechanism from the main PWB Removal Follow the order of indicated numbers 1 Remove the reel belt 1 2 Remove the slow brake lever 2 3 Remove the three screws 3 Figure 4 38 2 4 4 5 D D stator ass y D D rotor ass y Upper drum 3 1 FFC Capstan D D motor Capstan D D motor control PWB 3 1 Reel belt Figure 4 37 1 2 Slow Brake lever Reassembly 1 Taking care so that the capstan shaft does not c...

Page 23: ...WER DRUM ASSEMBLY Replacement Perform in the numerical order 1 Remove the motor as stated in Page 22 D D motor replacement 2 Remove the drum earth brush ass y 2 3 Remove the drum base 3 from the upper and lower drum assembly 1 Cares when replacing the drum 1 Be careful so that the drum earth brush is not lost 2 Do not touch directly the drum surface 3 Fit gently the screwdriver to the screws 4 Sin...

Page 24: ...s y 3Insert Open Lever Insert reverse guide lever ass y Align here 2 Insert pinch drive cam Pinch drive lever ass y Fit the pinch drive cam so that the notch of pinch drive cam aligns with the dent of pinch drive lever assembly Fit the pinch drive cam so that the notch of pinch drive lever assembly aligns with the half round notch of chassis Turn the reverse guide lever assembly counterclockwise t...

Page 25: ...phase matching at the insert point 1 see the PHASE MATCHING point 2 as shown below 4 Finally fix the inserts 1 and 4 Capstan D D motor Drum Reel pulley Bottom side of mechanism chassis Sifter Phase Matching point 2 Insert point 1 Half round notch Shaft 1 Round mark Loading gear T Insert point 3 Insert point 4 Insert point 5 Release point 3 Phase matching point 1 Shaft 1 Shaft 1 Shaft 2 Insert poin...

Page 26: ...ve the loading motor and install the replacement loading motor as shown below Figure 4 46 Figure 4 44 2 Wheninstallingthemastercam align the casecon drive gear round mark with the half round notch of master cam The loading motor pressing in must be less than 147 N 15 kgf Adjust the distance between motor and pulley to 10 2 mm E ring XRESJ30 06000 Master cam Fully turn clockwise Fully turn counterc...

Page 27: ...rive Gear R ASSEMBLY OF CASSETTE HOUSING 1 Drive Gear and R Drive angle ass y Figure 4 47 MSPRT0381GEFJ Apply grease Apply grease Apply grease LANGF9592GEFW Top surface should be free from scratches or soil Drive angle Drive gear R Frame Figure 4 48 ...

Page 28: ...stments otherwise adjustments can not be completed Instruments required Blank video cassette tape DC voltmeter Screwdriver for adjustment Colour TV monitor Dual trace oscilloscope Alignment tape VROCPSV Servicing precations When the IC705 E2 PROM has been replaced make the following reprogramming Depending on models the IC705 E2 PROM has been factry adjusted for it s memory function It s therefore...

Page 29: ... same time to set the tracking in center 3 AC power cord is plugged in 4 You can mechanism operatig mode Replug the AC power cord a few minutes later Measuring instrument Mode Cassette Colour TV monitor Playback Self recorded tape SP LP mode See Note below Control Tracking control buttons or Specification Minimized noise on monitor screen ADJUSTMENT OF PAL SYSTEM SP LP EP SLOW TRACKING PRESET 1 Ha...

Page 30: ...on to freeze the picture 3 Lookatthemonitorscreenandadjust or TRACK ING buttons so that the vertical jitter of the picture to be minimized 4 Play and freeze the self recorded tape in SP mode and make sure vertical jitter of the picture is not noticeable For the LP mode put adjustment at the same adjustment way as SP mode Note 1 The FV goes back to the it s initial state when the unit is put into t...

Page 31: ...0 1 1 0 0 0 0 0 1 0 0 1 or 0 Loading motor turns in reverse direction and master cam counterclockwise CASSETTE INSERTION STOP Cassette inserting Full loading YES YES YES NO NO NO Unloading Loading motor starts in normal direction and master cam counter clockwise Does mechanism position sw come off within 2 5 sec Are start end sensors at low level before cassette insertion Insert cassette Double ac...

Page 32: ...Stop capstan motor NO YES Press STILL key Pinch roller releasing Idler swinging Pinch roller pressing Loading motor turns clockwise and master cam counterclockwise Turn capstan motor in reverse direction Turn loading motor counterclockwise Cam switch is at VSR position Set capstan motor to search speed Is take up reel sensor signal outputted Press REW key Release pinch roller Cam switch is at PU2 ...

Page 33: ... motor stops End Loading motor turns in clockwise and master cam counterclockwise 4 supply reel pulses outputted Does the take up reel pulse output two edges Capstan motor turns clockwise Loading motor turns clockwise Cam switch is at Eject position Loading motor stops Capstan motor stops Press EJECT key Tape unloading Cassette eject End Capstan motor turns clockwise Capstan motor turns counterclo...

Page 34: ...n trouble Does capstan motor turn in FF or REW direction Are idler wheel ass y and reel disk in mesh Is the pulse outputted from reel sensor The cassette tape is presumably damaged 2 REC PLAY FAILURE MODE RELEASE NO NO NO NO NO NO NO YES YES YES YES YES YES YES YES Is the master cam at PB position Does loading motor operate Modes changing smoothly through cam switch Loading motor control system in...

Page 35: ... in mesh Is supply reel disk winding torque normal Is pulse outputted from reel sensor Check main PWB YES YES YES YES YES NO NO NO NO NO YES YES NO NO YES Press REW key 4 i Unusual sound in cassette insertion and ejection mode Is unusal sound heard during cassette coutrol running Unusual sound heard with pinch roller lever going up or down Is unusual sound heard during loading unloading Check pinc...

Page 36: ...t reel disk Drive system out of contact with any part on main PWB Turn capstan motor by hand Unusual sound heard Check drive system s gears for damage Replace damaged gear with new one Reel disk Limiter pulley ass y Idler wheel ass y Check reel disk and main chassis And replace defective parts Adjust reel disk height Rearrange the parts on main PWB ...

Page 37: ... if poor replace at the same time Check short circuit or leak of D9601 D9602 D9603 D9604 D9606 D9607 and secondary circuit FLOW CHART NO 5 TIMER TROUBLESHOOTING 1 The flourescent display tube fails light up Is the supply voltage of 5V fed to pin 18 of IC801 Check STBY 5V line Is the supply negative voltage of 28V fed to pin 16 of IC801 Check negative voltage line STBY 28V and power circuit Is the ...

Page 38: ... A cassette tape is not take in NO NO Check start sensor cover Check line between start sensor and pin 79 of IC701 Check line between pin 93 of IC701 and pin 11 of IC702 Is the supply voltage of 12V fed to pin 9 of IC702 Check M 12V lines Check IC702 Check line between IC702 and loading motor Replace loading motor Is the specified voltage applied at the loading motor terminal when the cassette tap...

Page 39: ...d pin 79 of IC701 Does the end sensor pulse at pin 85 of IC701 change from L to H level when the cassette tape is loaded Check line between end sensor and pin 85 of IC701 Does the master cam mode shifter operate normally when he cassette tape is loaded Check line between cam switch and IC701 Replace IC701 YES YES YES FLOW CHART NO 10 LOADING MOTOR AND EJECT TROUBLESHOOTING The cassette tape fails ...

Page 40: ...ck line between the pin 60 of IC701 and pin 3 of AC connector Is the supply voltage of 25V 12V fed to pin 5 of AC connector YES Replace capstan motor Check MOTOR Vcc line and motor voltage selector circuit Q9907 9908 FLOW CHART NO 14 DRUM MOTOR TROUBLESHOOTING 2 The drum motor runs only for a few seconds Replace IC702 Check peripheral circuit of pins 4 5 6 and 7 of IC702 Is drum PG signal given ou...

Page 41: ...rcuit of pin 50 of IC701 C746 C747 and R745 Check drum FG signal line Is the head switching pulse at pin 23 of IC701 present NO See FLOW CHART NO 15 HEAD SWITCHING PULSE TROUBLESHOOTING YES YES Is the drum APC output at pin 34 of IC701 and drum AFC output at pin 32 of IC701 present NO Replace IC701 YES YES Is the drum control voltage applied to pin 2 of IC702 YES Is pin 58 of IC701 in high impedan...

Page 42: ... and 33 of IC701 Replace IC701 Replace A C head YES YES YES NO NO NO Is there capstan AFC signal at pin 31 of IC701 NO NO NO Is there capstan APC signal at pin 33 of IC701 YES NO Replace IC701 Does PB CTL signal appear at pin 76 of IC701 Replace IC701 Is there REC CTL signal output at pins 75 and 74 of IC701 Does PB CTL signal appear at pin 76 of IC701 Does A C head operate normally Adjust the hei...

Page 43: ...5V line YES YES YES YES YES YES YES YES YES NO NO NO NO Is there picture signal inputted at pin 82 of IC2401 Replace IC2001 YES YES NO NO NO NO NO NO NO NO NO Is there picture signal outputted at pins 25 26 of IC2501 Check the line between IC2501 peripheral and output terminal periphery Check peripheral circuit of IC2501 YES YES COMPOSITE VIDEO Is there Y signal outputted at pin 21 of IC2001 Check...

Page 44: ...in 61 of IC201 YES YES YES YES NO Is there chroma signal inputted at pin 46 of IC201 YES NO Is there chroma signal inputted at pin 58 of IC201 YES NO NO Check peripheral circuit pin 61 of IC201 and PC 5V line Check line between pin 60 and pin 46 of IC201 C512 YES Is the supply voltage of 5V PRE REC Vcc fed to pin 90 of IC201 NO Replace IC201 Check whether the pins 73 and 75 of IC201 oscillate 4 43...

Page 45: ...IC501 and pin 97 of IC701 Replace IC501 Is there luminance signal approx 0 25Vp p inputted at pin 14 of IC201 Is there luminance signal approx 0 5 Vp p inputted at pin 5 of IC2001 Is there luminance signal approx 0 4 Vp p inputted at pin 1 of IC2002 NO YES Check peripheral circuit of pins 13 and 14 of IC201 NO YES Check line between pin 18 of IC201 and pin 5 of IC2001 Check line between pin 3 of I...

Page 46: ...putted at pins 58 and 56 of IC6301 RF output terminal Is there audio signal outputted at pin 57 of IC6301 Line output terminal Check line ranging from pins 58 and 56 of IC6301 to pins 2 and 1 of IC2501 RF output terminal Check line ranging from pin 57 of IC6301 to the audio input terminal pin 21 of tuner TU1401 Are there the serial data and clock at pins 31 and 32 of IC6301 Is there audio signal o...

Page 47: ...e IC6301 pins 26 to 22 CH 1 pins 26 to 25 CH 2 Is the supply voltage of 5V fed to pin 20 of IC6301 Check AH MZ harness Is there L level at pin 33 of IC6301 Check or replace the cylinder Check the Hi Fi CTL line between pin 33 or IC6301 and pin 20 of IC701 YES Check the record current setting resistor R352 at pin 27 of IC6301 L ch pins 41 40 39 38 37 R ch pins 10 11 12 15 16 FLOW CHART NO 24 LINEAR...

Page 48: ...01 YES YES NO NO NO NO YES FLOW CHART NO 26 NICAM IGR TROUBLESHOOTING NO NO YES YES YES YES YES Is 5V supplied at pins 11 19 1 of IC1701 Check PC 5V line Is 8V supplied at pin 33 of IC1701 Check the REG circuit of D9905 Check PC MOTOR 12V line Check peripheral circuit of IC1701 Replace IC1701 Check peripheral circuit of X1701 Is there a NICAM IGR audio signal at pins 31 30 of IC1701 Is there a NIC...

Page 49: ...utput R ch E1 L1 audio input R ch Pin56 of IC6301 Audio output R ch pin15 pin37 pin1 pin31 E2 L2 audio output R ch 21PIN CONNECTOR B C A B C D E2 L2 video input E1 L1 video input Tuner video input Front audio input L ch pin28 pin23 pin18 pin13 pin5 Pin31 of IC201 Y C video input Tuner Aux input A B C D E2 L2 audio input L ch E1 L1 audio input L ch MPX output L ch Front video input pin33 pin36 pin1...

Page 50: ...e CLEAR button has been pressed OFF the memory function number lights up 4 Press the FF button on the remote control unit By doing lower 7 of the 10 digits are displayed in hexadecimal notation 5 Similarly to the above step 4 press the STOP button on the remote control unit By doing upper 3 of the 10 digits are displayed in hexadecimal notation 6 Example ON and OFF are taken as 1 and 0 respectivel...

Page 51: ...65 65 65 04 04 04 ROM ADRS DATA A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 AA Ab AC Ad AE AF 05 05 05 05 05 05 81 81 81 81 81 81 FF FF FF FF ROM ADRS DATA B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 BA Bb BC Bd BE BF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF ROM ADRS DATA d0 d1 d2 d3 d4 d5 d6 d7 d8 d9 dA db dC dd dE dF 7B 7B 4B 4B 4B 00 04 04 04 08 08 08 08 08 08 0C ROM ADRS DATA E0 E1 E2 E3 E4 E5 E6 E7 E8 E9 EA Eb EC...

Page 52: ... 1 2 0 JP27 DNR 1 JP26 POST CODE 1 JP25 SAT CTL 1 JP24 AV LINK 16 9 1 JP23 Hi Fi 1 JP22 SORT CLOCK 1 JP21 DECODER 1 JP20 SURROUND 0 JP19 IGR 0 JP18 NICAM 1 JP17 G CODE1 1 JP16 G CODE0 1 JP15 EP Tape Speed 1 1 JP14 LP Tape Speed 0 0 JP13 F AV 1 JP12 2 SCART 1 JP11 RF OUTPUT OFF 0 JP10 TUNER2 1 JP9 TUNER1 0 JP8 TUNER0 0 JP7 SYSTEM1 0 JP6 SYSREM0 0 JP5 INT SAT 0 JP4 LOW POWER 1 JP3 OEM 0 JP2 VPS PDC ...

Page 53: ...53 VC S2000HM 8 BLOCK DIAGRAM POWER CIRCUIT BLOCK DIAGRAM ...

Page 54: ...55 54 VC S2000HM VC S2000HM SYSTEM SERVO BLOCK DIAGRAM ...

Page 55: ...57 56 VC S2000HM VC S2000HM SIGNAL FLOW BLOCK DIAGRAM 1 2 ...

Page 56: ...59 58 VC S2000HM VC S2000HM SIGNAL FLOW BLOCK DIAGRAM 2 2 ...

Page 57: ...61 60 VC S2000HM VC S2000HM AUDIO BLOCK DIAGRAM ...

Page 58: ...OTES 1 The unit of resistance ohm is omitted k 1000 ohm M 1 Meg ohm 2 Allresistorsare1 8watt unlessotherwisenoted 3 The unit of capacitance F is omitted µ µF p µµF 4 The values in parentheses are the ones in the PB mode the values without parentheses are the ones in the REC mode VOLTAGE MEASUREMENT CONDITIONS 1 DC voltages are measured between points indi cated and chassis ground by VTVM with AC23...

Page 59: ...63 10 11 12 13 14 15 16 17 18 19 VC S2000HM 1 2 3 4 5 6 7 8 9 10 A B C D E F G H I J 9 SCHEMATIC DIAGRAM AND PWB FOIL PATTERN OPERATION L CIRCUIT ...

Page 60: ...65 64 VC S2000HM VC S2000HM 1 2 3 4 5 6 7 8 9 10 A B C D E F G H I J 11 12 13 14 15 16 17 18 19 VOLTAGE MEASUREMENT MODE PB Parentheses REC Without Parentheses MAIN CIRCUIT 1 ...

Page 61: ...67 66 VC S2000HM VC S2000HM 1 2 3 4 5 6 7 8 9 10 A B C D E F G H I J 11 12 13 14 15 16 17 18 19 VOLTAGE MEASUREMENT MODE PB Parentheses REC Without Parentheses MAIN CIRCUIT 2 ...

Page 62: ...69 68 VC S2000HM VC S2000HM 1 2 3 4 5 6 7 8 9 10 A B C D E F G H I J 11 12 13 14 15 16 17 18 19 VOLTAGE MEASUREMENT MODE PB Parentheses REC Without Parentheses MAIN CIRCUIT 3 ...

Page 63: ...71 70 VC S2000HM VC S2000HM 1 2 3 4 5 6 7 8 9 10 A B C D E F G H I J 11 12 13 14 15 16 17 18 19 VOLTAGE MEASUREMENT MODE PB Parentheses REC Without Parentheses MAIN CIRCUIT 4 ...

Page 64: ...73 72 VC S2000HM VC S2000HM 1 2 3 4 5 6 7 8 9 10 A B C D E F G H I J 11 12 13 14 15 16 17 18 19 FUNCTION CIRCUIT VOLTAGE MEASUREMENT MODE PB Parentheses REC Without Parentheses ...

Page 65: ...75 74 VC S2000HM VC S2000HM 1 2 3 4 5 6 7 8 9 10 A B C D E F G H I J 11 12 13 14 15 16 17 18 19 TERMINAL CIRCUIT VOLTAGE MEASUREMENT MODE PB Parentheses REC Without Parentheses ...

Page 66: ...76 1 2 3 4 5 6 7 8 9 10 A B C D E F G H I J VC S2000HM OPERATION R CIRCUIT ...

Page 67: ...77 10 11 12 13 14 15 16 17 18 19 VC S2000HM 1 2 3 4 5 6 7 8 9 10 A B C D E F G H I J PWB FOIL PATTERN FUNCTION PWB Chip Parts Side FUNCTION PWB Components Side ...

Page 68: ...79 78 VC S2000HM VC S2000HM 1 2 3 4 5 6 7 8 9 10 A B C D E F G H I J 11 12 13 14 15 16 17 18 19 MAIN PWB ...

Page 69: ...80 1 2 3 4 5 6 7 8 9 10 A B C D E F G H I J VC S2000HM TERMINAL PWB OPERATION L PWB OPERATION L PWB ...

Page 70: ...OTES 1 The unit of resistance ohm is omitted k 1000 ohm M 1 Meg ohm 2 Allresistorsare1 8watt unlessotherwisenoted 3 The unit of capacitance F is omitted µ µF p µµF 4 The values in parentheses are the ones in the PB mode the values without parentheses are the ones in the REC mode VOLTAGE MEASUREMENT CONDITIONS 1 DC voltages are measured between points indi cated and chassis ground by VTVM with AC23...

Page 71: ...63 10 11 12 13 14 15 16 17 18 19 VC S2000HM 1 2 3 4 5 6 7 8 9 10 A B C D E F G H I J 9 SCHEMATIC DIAGRAM AND PWB FOIL PATTERN OPERATION L CIRCUIT ...

Page 72: ...65 64 VC S2000HM VC S2000HM 1 2 3 4 5 6 7 8 9 10 A B C D E F G H I J 11 12 13 14 15 16 17 18 19 VOLTAGE MEASUREMENT MODE PB Parentheses REC Without Parentheses MAIN CIRCUIT 1 ...

Page 73: ...67 66 VC S2000HM VC S2000HM 1 2 3 4 5 6 7 8 9 10 A B C D E F G H I J 11 12 13 14 15 16 17 18 19 VOLTAGE MEASUREMENT MODE PB Parentheses REC Without Parentheses MAIN CIRCUIT 2 ...

Page 74: ...69 68 VC S2000HM VC S2000HM 1 2 3 4 5 6 7 8 9 10 A B C D E F G H I J 11 12 13 14 15 16 17 18 19 VOLTAGE MEASUREMENT MODE PB Parentheses REC Without Parentheses MAIN CIRCUIT 3 ...

Page 75: ...71 70 VC S2000HM VC S2000HM 1 2 3 4 5 6 7 8 9 10 A B C D E F G H I J 11 12 13 14 15 16 17 18 19 VOLTAGE MEASUREMENT MODE PB Parentheses REC Without Parentheses MAIN CIRCUIT 4 ...

Page 76: ...71 70 VC S2000HM VC S2000HM 1 2 3 4 5 6 7 8 9 10 A B C D E F G H I J 11 12 13 14 15 16 17 18 19 VOLTAGE MEASUREMENT MODE PB Parentheses REC Without Parentheses MAIN CIRCUIT 4 ...

Page 77: ...73 72 VC S2000HM VC S2000HM 1 2 3 4 5 6 7 8 9 10 A B C D E F G H I J 11 12 13 14 15 16 17 18 19 FUNCTION CIRCUIT VOLTAGE MEASUREMENT MODE PB Parentheses REC Without Parentheses ...

Page 78: ...75 74 VC S2000HM VC S2000HM 1 2 3 4 5 6 7 8 9 10 A B C D E F G H I J 11 12 13 14 15 16 17 18 19 TERMINAL CIRCUIT VOLTAGE MEASUREMENT MODE PB Parentheses REC Without Parentheses ...

Page 79: ...76 1 2 3 4 5 6 7 8 9 10 A B C D E F G H I J VC S2000HM OPERATION R CIRCUIT ...

Page 80: ...57 56 VC S2000HM VC S2000HM SIGNAL FLOW BLOCK DIAGRAM 1 2 ...

Page 81: ...59 58 VC S2000HM VC S2000HM SIGNAL FLOW BLOCK DIAGRAM 2 2 ...

Page 82: ...55 54 VC S2000HM VC S2000HM SYSTEM SERVO BLOCK DIAGRAM ...

Page 83: ...53 VC S2000HM 8 BLOCK DIAGRAM POWER CIRCUIT BLOCK DIAGRAM ...

Page 84: ...61 60 VC S2000HM VC S2000HM AUDIO BLOCK DIAGRAM ...

Page 85: ...ing and adjusting the reel disk height When fixing any part to the threaded hole using resin with screw use the jig Specified torque 5 kg This cassette torque meter is used for check ing and adjusting the torque of take up for measuring tape back tension These Jigs are used for checking and adjusting the torque of take up and supply reel disks Master Plane Jig and Reel Disk Height Adjusting Jig Pi...

Page 86: ...ole on pole base Full erase head A C head Upper and lower drum ass y Capstan D D motor Pinch roller Reel belt Tension band ass y Loading motor Idler ass y Limiter pulley Supply take up main brake levers AHC Automatic Head Cleaner color and beating Small sound or sound distortion Poor S N ratio no color Poor flatness of the envelope with alignment tape No tape running uneven color No tape running t...

Page 87: ...tool do not contact the guide pin or drum 5 After installing the cassette housing control once per form cassette loading operation TO RUN A TAPE WITHOUT THE CASSETTE HOUSING CONTROL ASSEMBLY 1 Remove the full surface panel 2 Short circuit TP801 3 Plug in the power cord 4 Turn off the power switch The pole bases move into U L position 5 Open the lid of a cassette tape by hand 6 Hold the lid with tw...

Page 88: ... brake surface 2 After reassembly check the video search rewind back tension see page 15 and check the brake torque see page 17 Height checking and adjustment Note 1 Set the master plane with due care so that it does not contact the drum 2 When putting the master plane shift the reverse guide a little in the loading direction Care must be taken since excessive shift results in damage Figure 4 6 No...

Page 89: ...uiting TP801 provided at the center facing to the main PWB plug in the power cord Setting 1 Set a torque gauge to zero on the scale Place it on the take up reel disk 2 Press the FF button 3 To calculate the remaining capacity of the play back mode slowly rotate the supply reel disk and then shift it into the forward mode Checking 1 Turn the torque gauge slowly one rotation every 2 to 3 seconds by ...

Page 90: ...nterclockwise very slowly one rotation every 1 to 2 seconds and check that the torque is within the set value 14 0 3 9mN m 144 40gf cm Figure 4 11 Torque gauge Supply reel disk Note Surely put the torque gauge on the reel disk to measure If the torque gauge is raised accurate measurement is impossible Adjustment If the rewinding playback winding up torque is not within the setting replace the limi...

Page 91: ...RCH REWIND BACK TENSION Remove the cassette housing control assembly After short circuiting TP801 provided at the center facing to the main PWB plug in the power cord Checking 1 After pressing the play button press the rewind button and set the video search rewind mode 2 Place the torque gauge on the take up reel disk and turn it counterclockwise very slowly one rotation every 2 to 3 seconds and c...

Page 92: ...HECKING AND ADJUSTMENT OF RECORD PLAYBACK BACK TENSION Remove the cassette housing control assembly After short circuiting TP801 provided at the center facing to the main PWB plug in the power cord Setting 1 Turn off the power switch 2 Open the torque cassette meter and fix with tape 3 Set the cassette tape in loading state 4 Put the weight 500g on the cassette torque meter 5 Turn on the power swi...

Page 93: ...0gf cm Figure 4 20 CHECKING THE BRAKE TORQUE Checking the brake torque at the supply side CCW 2 9 9 8mN m 30 100gf cm CW 4 9 13 7mN m 50 140gf cm Figure 4 21 Tension arm Tension spring CW CCW CW Supply reel disk Torque gauge Torque gauge CCW Take up reel disk A B Remove the cassette housing control assembly After short circuiting TP801 provided at the center facing to the main PWB plug in the powe...

Page 94: ...ding state unplug the power cord Removal 1 Remove the screws123 Azimuth screw Tilt screw 2 Unsolder the PWB fitted to the A C head Notes 1 When replacing never touch the head If you touched clean with the cleaning liquid 2 When removing the screw 3 take care so that the spring may out New A C head ass y A C head PWB 2 Spring 1 Solder Never touch the head 10 8mm 10 8mm Azimuth screw Height screw Ti...

Page 95: ...everse guide height adjustment jig in tape loading state Refer to Figure 4 28 a b Figure 4 29 3 Set the tape and check for tape crease near the reverse guide in the playback mode If crease is found turn the reverse guide adjustment nut to remove crease As for crease check refer to Figure 4 30 a b Figure 4 28 2 Rotate counterclockwise the reverse guide height ad justment nut 1 10 turn For height ad...

Page 96: ... tape crease appears once at the flange and then return the tilt screw so that the crease disappears 2 If there is tape crease Turn counterclockwise the tilt screw so that the tape crease disappears Reference If the tilt screw is turned clockwise crease appears at the lower flange Guide roller Weight of 500g Cassette Tape 2 Adjustment of A C head height and azimuth 1 Perform the initial setting of...

Page 97: ...ck switching point Refer to the electric adjustment method 6 Playback the self picture recorded tape and check the flatness of envelope waveform and sound Notes When the A C head X value adjustment is performed be sure to perform at first X value rough adjustment refer to Page 20 3 2 Take up side Supply side Take up side Adjustment Supply side Supply side guide roller rotated in clockwise directio...

Page 98: ...removing the mechanism from the main PWB Removal Follow the order of indicated numbers 1 Remove the reel belt 1 2 Remove the slow brake lever 2 3 Remove the three screws 3 Figure 4 38 2 4 4 5 D D stator ass y D D rotor ass y Upper drum 3 1 FFC Capstan D D motor Capstan D D motor control PWB 3 1 Reel belt Figure 4 37 1 2 Slow Brake lever Reassembly 1 Taking care so that the capstan shaft does not c...

Page 99: ...WER DRUM ASSEMBLY Replacement Perform in the numerical order 1 Remove the motor as stated in Page 22 D D motor replacement 2 Remove the drum earth brush ass y 2 3 Remove the drum base 3 from the upper and lower drum assembly 1 Cares when replacing the drum 1 Be careful so that the drum earth brush is not lost 2 Do not touch directly the drum surface 3 Fit gently the screwdriver to the screws 4 Sin...

Page 100: ...s y 3Insert Open Lever Insert reverse guide lever ass y Align here 2 Insert pinch drive cam Pinch drive lever ass y Fit the pinch drive cam so that the notch of pinch drive cam aligns with the dent of pinch drive lever assembly Fit the pinch drive cam so that the notch of pinch drive lever assembly aligns with the half round notch of chassis Turn the reverse guide lever assembly counterclockwise t...

Page 101: ...phase matching at the insert point 1 see the PHASE MATCHING point 2 as shown below 4 Finally fix the inserts 1 and 4 Capstan D D motor Drum Reel pulley Bottom side of mechanism chassis Sifter Phase Matching point 2 Insert point 1 Half round notch Shaft 1 Round mark Loading gear T Insert point 3 Insert point 4 Insert point 5 Release point 3 Phase matching point 1 Shaft 1 Shaft 1 Shaft 2 Insert poin...

Page 102: ...ve the loading motor and install the replacement loading motor as shown below Figure 4 46 Figure 4 44 2 Wheninstallingthemastercam align the casecon drive gear round mark with the half round notch of master cam The loading motor pressing in must be less than 147 N 15 kgf Adjust the distance between motor and pulley to 10 2 mm E ring XRESJ30 06000 Master cam Fully turn clockwise Fully turn counterc...

Page 103: ...rive Gear R ASSEMBLY OF CASSETTE HOUSING 1 Drive Gear and R Drive angle ass y Figure 4 47 MSPRT0381GEFJ Apply grease Apply grease Apply grease LANGF9592GEFW Top surface should be free from scratches or soil Drive angle Drive gear R Frame Figure 4 48 ...

Page 104: ...stments otherwise adjustments can not be completed Instruments required Blank video cassette tape DC voltmeter Screwdriver for adjustment Colour TV monitor Dual trace oscilloscope Alignment tape VROCPSV Servicing precations When the IC705 E2 PROM has been replaced make the following reprogramming Depending on models the IC705 E2 PROM has been factry adjusted for it s memory function It s therefore...

Page 105: ... same time to set the tracking in center 3 AC power cord is plugged in 4 You can mechanism operatig mode Replug the AC power cord a few minutes later Measuring instrument Mode Cassette Colour TV monitor Playback Self recorded tape SP LP mode See Note below Control Tracking control buttons or Specification Minimized noise on monitor screen ADJUSTMENT OF PAL SYSTEM SP LP EP SLOW TRACKING PRESET 1 Ha...

Page 106: ...on to freeze the picture 3 Lookatthemonitorscreenandadjust or TRACK ING buttons so that the vertical jitter of the picture to be minimized 4 Play and freeze the self recorded tape in SP mode and make sure vertical jitter of the picture is not noticeable For the LP mode put adjustment at the same adjustment way as SP mode Note 1 The FV goes back to the it s initial state when the unit is put into t...

Page 107: ...S2SK2848 1 J 2SK2848 AH å Q902 VS2SC2001LK 1 J 2SC2001LK AA å Q903 VS2PD601AR 1 J 2PD601AR AB å Q904 VS2PD601AR 1 J 2PD601AR AB å Q910 VS2PD601AR 1 J 2PD601AR AB Q1705 VS2PB709AR 1 J 2PB709AR AB Q1706 VS2PB709AR 1 J 2PB709AR AB Q1801 VSUN2211 1 J UN2211 AA Q1802 VS2PD601AR 1 J 2PD601AR AB Q1803 VS2PD601AR 1 J 2PD601AR AB Q1804 VS2PD601AR 1 J 2PD601AR AB Q1805 VS2PD601AR 1 J 2PD601AR AB Q1806 VS2PD...

Page 108: ...Y1HB561K J 560p 50V Ceramic AA C354 VCKYCY1HF103Z J 0 01 50V Ceramic AA C355 VCKYCY1AF105Z J 1 10V Ceramic AC C356 VCCCCY1HH820J J 82p 50V Ceramic AA C357 VCCCCY1HH560J J 56p 50V Ceramic AA C501 VCEA9M0JW107M J 100 6 3V Electrolytic AB C502 VCKYCY1EF104Z J 0 1 25V Ceramic AA C503 VCKYCY1CB104K J 0 1 16V Ceramic AB C504 VCEA9M1HW225M J 2 2 50V Electrolytic AB C505 VCKYCY1CB273K J 0 027 16V Ceramic ...

Page 109: ...mic AA C732 VCKYCY1HB102K J 1000p 50V Ceramic AA C733 VCKYCY1CB393K J 0 039 16V Ceramic AA C734 VCKYCY1CB393K J 0 039 16V Ceramic AA C736 VCKYCY1HB102K J 1000p 50V Ceramic AA C737 VCKYCY1HF103Z J 0 01 50V Ceramic AA C738 VCKYCY1EF104Z J 0 1 25V Ceramic AA C739 VCKYCY1HB222K J 2200p 50V Ceramic AA C740 VCKYCY1HF103Z J 0 01 50V Ceramic AA C741 VCCCCY1HH390J J 39p 50V Ceramic AA C742 VCEA9M1HW105M J ...

Page 110: ... R201 VRS CY1JF682J J 6 8k 1 16W Metal Oxide AA R202 VRS CY1JF182J J 1 8k 1 16W Metal Oxide AA R203 VRS CY1JF682J J 6 8k 1 16W Metal Oxide AA R204 VRS CY1JF821J J 820 1 16W Metal Oxide AA R205 VRS CY1JF103J J 10k 1 16W Metal Oxide AA R206 VRS CY1JF683J J 68k 1 16W Metal Oxide AA R207 VRS CY1JF102J J 1k 1 16W Metal Oxide AA R208 VRS CY1JF471J J 470 1 16W Metal Oxide AA R210 VRS CY1JF102J J 1k 1 16W...

Page 111: ...S CY1JF334J J 330k 1 16W Metal Oxide AA R1814 VRS CY1JF101J J 100 1 16W Metal Oxide AA R1815 VRS CY1JF104J J 100k 1 16W Metal Oxide AA R704 VRS CY1JF392J J 3 9k 1 16W Metal Oxide AA R705 VRS CY1JF104J J 100k 1 16W Metal Oxide AA R706 VRS CY1JF564J J 560k 1 16W Metal Oxide AA R707 VRD RA2BE123J J 12k 1 8W Carbon AA R708 VRD RA2BE123J J 12k 1 8W Carbon AA R709 VRD RM2HD680J J 68 1 2W Carbon AA R710 ...

Page 112: ... 220 1 16W Metal Oxide AA R9911 VRD RA2EE562J J 5 6k 1 4W Carbon AA R9912 VRD RA2EE150J J 15 1 4W Carbon AA R9917 VRS CY1JF333J J 33k 1 16W Metal Oxide AA R9918 VRS CY1JF822J J 8 2k 1 16W Metal Oxide AA RJ1 VRS CY1JF000J J 0 1 16W Metal Oxide AA RJ2 VRS CY1JF000J J 0 1 16W Metal Oxide AA RJ3 VRS CY1JF000J J 0 1 16W Metal Oxide AA RJ4 VRS CY1JF000J J 0 1 16W Metal Oxide AA RJ5 VRS CY1JF000J J 0 1 1...

Page 113: ...332F J 3 3k 1 16W Metal Oxide AA R2011 VRS CY1JF332F J 3 3k 1 16W Metal Oxide AA R2012 VRS CY1JF152F J 1 5k 1 16W Metal Oxide AA R2013 VRS CY1JF471F J 470 1 16W Metal Oxide AA R2014 VRS CY1JF102F J 1k 1 16W Metal Oxide AA R2015 VRS CY1JF102F J 1k 1 16W Metal Oxide AA DIODES AND LED S D2002 VHDMA152WK 1 J Diode AA D2006 VHD1SS119 1 J Diode AB D2402 VHD1SS119 1 J Diode AB D2401 RH EX0604GEZZ J Zener...

Page 114: ... 0 1 16W Metal Oxide AA R2434 VRS CY1JF473J J 47k 1 16W Metal Oxide AA R2435 VRS CY1JF242F J 2 4k 1 16W Metal Oxide AA R2436 VRS CY1JF223F J 22k 1 16W Metal Oxide AA R2437 VRS CY1JF123F J 12k 1 16W Metal Oxide AA R2438 VRS CY1JF821J J 820 1 16W Metal Oxide AA R2439 VRS CY1JF122J J 1 2k 1 16W Metal Oxide AA R2440 VRS CY1JF223J J 22k 1 16W Metal Oxide AA R2442 VRS CY1JF223J J 22k 1 16W Metal Oxide A...

Page 115: ...AA R2519 VRS CY1JF750J J 75 1 16W Metal Oxide AA R2520 VRD RA2BE750J J 75 1 8W Carbon AA R2521 VRS CY1JF000J J 0 1 16W Metal Oxide AA R2523 VRS CY1JF332J J 3 3k 1 16W Metal Oxide AA R2524 VRD RA2BE101J J 100 1 8W Carbon AB R2526 VRS CY1JF103J J 10k 1 16W Metal Oxide AA R2527 VRS CY1JF101J J 100 1 16W Metal Oxide AA R2528 VRS CY1JF222J J 2 2k 1 16W Metal Oxide AA R2529 VRS CY1JF332J J 3 3k 1 16W Me...

Page 116: ...e Drive Lever AB 21 MLEVP0292GEZZ J Slow Brake Lever AE 22 MLEVP0290GEZZ J Open Lever AD 23 MLEVP0293GEZZ J Clutch Lever AE 24 MLEVP0324GEZZ J Supply Main Brake Ass y AF MECHANISM CHASSIS 25 MLEVP0325GEZZ J Take Up Main Brake AF Ass y 26 CLEVP0287AJZZ J Auto Head Cleaner Ass y AG 27 MSLiP0010GEZZ J Sifter AH 29 MSPRD0175GEFJ J Reverse Guide Spring AE 30 MSPRT0402GEFJ J Loading Double Action AE Spr...

Page 117: ...ttom AE 614 LHLDZ2073AJZZ V Display Holder Top AF 615 XJBSD30P16000 J Screw AV AA 616 GBDYU3111AJFW V Bottom Plate AM 617 LX HZ3047GEFF J Screw Bottom Plate AA 618 LHLDZ2075AJZZ V PWB Holder AE 619 PSLDM4540AJFW V H A Shield AE 620 LHLDZ2077AJZZ V Foot Holder R AC 621 LHLDZ2076AJZZ V Foot Holder L AC 622 GLEGP9133AJSA V Decoration Foot Front AF 623 PGUMS0026AJZZ V Foot Rubber AB 624 GLEGP9134AJZZ ...

Page 118: ...S 31 12 20 18 214 19 29 49 51 8 11 203 49 51 7 58 52 4 25 24 2 33 15 1 50 218 207 67 207 53 216 41 61 21 38 17 208 60 47 44 6 30 36 9 39 45 219 10 30 40 27 43 46 43 35 35 37 34 23 48 209 210 211 212 213 223 5 26 68 69 55 16 222 221 201 202 202 220 59 70 57 71 56 32 22 63 62 66 66 66 66 65 62 74 72 73 216 ...

Page 119: ...93 VC S2000HM 7 6 5 4 3 2 1 A B C D E F G H CASSETTE HOUSING CONTROL PARTS 301 300 304 311 308 311 305 306 309 303 312 316 315 307 314 310 317 313 302 ...

Page 120: ... G H MECHANICAL PARTS D c b a c b a B C A C D B A 601 604 604 608 608 608 618 610 610 619 603 615 610 608 618 619 609 612 609 628 629 614 613 605 610 605 602 607 626 627 606 630 616 617 620 623 625 625 622 624 623 611 622 623 625 625 625 621 ...

Page 121: ...raw out the left side rod Do not mount the front panel with the cassette cover tilted too open Otherwise the cassette covermightwronglyrun onthecassettehousing Keep the cassette over about 45 open and make sure that the cassette cover open le ver is between the front panel and the cassette cover Now fix the front panel in place Before attaching the front panel in position make surethatthecassettec...

Page 122: ...ANPSUKM TQ0957 S Aug 2000 Printed in JAPAN SA KY TLABK0016UMZZ No Label SPAKC4068UMZZ Packing Case TGAN 3800UMZZ Guarantee Card TiNS 3894UMZZ Operation Manual QCNW 7870UMZZ 75ohm Coaxial Cable SPAKF0201UMZZ Accessory Case RRMCG1272AJSA Infrared Remote Control Unit SPAKC4453UMZZ Buffer Materia Fix with craft tape SPAKC4453UMZZ Buffer Material SPAKP0051UMZZ Foam Bag ...

Page 123: ...1 5W max at Low power mode Operating temperature 5 C to 40 C Storage temperature 20 C to 55 C Weight Approx 4 3 kg Dimensions 430 mm W x 300 mm D x 91 5 mm H VIDEO Input 1 0 Vp p 75 ohm Output 1 0 Vp p 75 ohm Horizontal resolution 250 lines SP mode AUDIO 0 dBs 0 775 Vrms Input Line1 3 8 dBs 10k ohm Line 2 3 8 dBs 10k ohm Line 3 3 8 dBs 47k ohm Output Line1 3 8 dBs 1k ohm Line 2 3 8dBs 1k ohm Hi Fi...

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