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1. CONTENTS

2. SPECIFICATIONS

2.1 Technical Specifications
2.2 Dimensions
2.3 Accessories

3. GENERAL DESCRIPTION

3.1 Service Manual
3.2 Tape Deck
3.3 Record/playback Amplifiers AM77
3.4 VU-meter Panel
3.5 Console
3.6 Remote Control Unit

4. INSTALLATION

4.1 Unpacking
4.2 Interconnection
4.3 Connector Table
4.4 Connector Drawings
4.5 Transportation

5. OPERATION

5.1 Switching On
5.2 Loading
5.3 Play Mode
5.4 Record Mode
5.5 Fast Wind Mode
5.6 Edit Mode
5.7 Stop Mode
5.8 Tape Deck Logic
5.9 Ready
5.10 Drop In/Out
5.11 Safe
5.12 Line/Sync/Repro
5.13 Solo/Defeat
5.14 Tape Timer
5.15 Search Function
5.16 Varispeed
5.17 Sync Output
5.18 Special Features
5.19 Tape Position Controller TPC

1977-05-01 TR532 CONTENTS

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Содержание TR532 Series

Страница 1: ...npacking 4 2 Interconnection 4 3 Connector Table 4 4 Connector Drawings 4 5 Transportation 5 OPERATION 5 1 Switching On 5 2 Loading 5 3 Play Mode 5 4 Record Mode 5 5 Fast Wind Mode 5 6 Edit Mode 5 7 S...

Страница 2: ...ical Brakes 7 9 Tape End Microswitch 7 10 Tension Arm Potentiometer 7 11 Edit Mechanism Microswitch 7 12 Pinch Roller Solenoid Microswitch 7 13 Tension Arm Guide Roller and Pinch Roller Air Cylinder 7...

Страница 3: ...8 7 Dynamic Brake System 8 8 Capstan and Guide Roller Solenoids 8 9 Remote Control Unit Muting System 8 10 Demagnetization 8 11 Ventilation 8 12 Lubrication 8 13 Removing Head Block 8 14 Tension Arm P...

Страница 4: ...e Standard 180 sec for 730 m tape 2400 ft Start time 15 ips approx 0 6 sec 30 ips approx 1 2 sec Timer accuracy 0 1 Signal inputs Balanced and floating Input impedance 10 kOhms 6 dBm to 24 dBm input l...

Страница 5: ...B I kHz Erase efficiency 75 dB minimum at 1 kHz Power requirements Standard 210 240 V 10 50 Hz 600 VA max Optional 110 V 120 V 240 V 50 60 Hz Working conditions Ambient temperature range 10 40 C Humid...

Страница 6: ...2 2 DIMENSIONS Remote control type RCU Remote control type TPC 1977 05 01 TR532 1977 05 02 2 2...

Страница 7: ...Remote Control type ATC 1984 05 17 TR532 2 2...

Страница 8: ...g of Q tips 2 Double air filter 5 Telephone lamp 36 V 50 mA 1 Minilamp 28 V 40 mA 4 Fuse 2 A slow 2 Fuse 4 A slow 2 Mains cable 3 m 1 Test cable 1 5 m coax with jack and banana plug 1 Manual 1 Dust co...

Страница 9: ...961910 2 Fuse 1A slow 999999 1 Mains cable 3 m 501027 1 Test cable 1 5 coax with jack and banana plug 969044 1 Manual 969046 1 Manual for ATC 501028 1 Extender print for AM77 953701 1 25 pole connecto...

Страница 10: ...k Minimag or similar Tape tension on either side of the capstan is maintained within working limits by servo controlling the wind motors by way of their respective tape tension sensing arm assemblies...

Страница 11: ...tion boards Furthermore there is a possibility of letting the tape speed pushbuttons control the amplifiers only In this way a 15 ips CCIR 15 ips NAB recorder is obtained For purposes where it is nece...

Страница 12: ...ons is so designed as to simplify the operators requirements in so far as routing systems and working requirements are concerned This allows the use of simpler desks or less tiring work routines Furth...

Страница 13: ...he seating of the individual RECORD PLAYBACK AMPLIFIERS modules Refer to the CONNECTOR TABLE below and check that all factory wired plugs and connectors are properly in place Proceed likewise with the...

Страница 14: ...6 VU METERS D To VU meter panel FACTORY 7 REMOTE CONTROL A D To remote control unit FACTORY 8 REMOTE CONTROL B C To remote control unit FACTORY 9 ERASE HEAD E To erase head FACTORY 10 RECORD HEAD E T...

Страница 15: ...hell DBI15339 2 E Siemens A42334 A44 A4 with tray A42334 A228 C95 Siemens A42334 A44 A3 with shell A42334 A228 A845 F Siemens A42334 A44 A3 with tray A42334 A228 C95 Siemens A42334 A44 A4 with shell A...

Страница 16: ...Rear view connector numbers shown without cables 1977 05 01 TR532...

Страница 17: ...RECORD INDICATION 1 8 9 16 17 24 When a channel is in RECORD output will be 24 V other wise a high impedance to ground Ext load min 3 Kohms No 4 SYNC OUT 1 8 9 16 17 24 Ext load min 10 kOhms No 13 Ex...

Страница 18: ...r this purpose the factory has developed a special transport frame that fits the front of the recorder see section 6 7 Move the recorder close to the back of the vehicle and place the transport frame...

Страница 19: ...it See section 7 1 for this adjustment 5 3 PLAY MODE Press START button on the TAPE DECK or on the REMOTE CONTROL UNIT Both buttons should illuminate the PINCH ROLLER and GUIDE ROLLER should pull in p...

Страница 20: ...Drawing No 5 02 Tape path 1977 05 01 TR532...

Страница 21: ...OP MODE Pressing the STOP button immediately interrupts the PLAY or RECORD modes In both cases the tape motion is immediately halted and the tape is lifted from the heads Coming from the RECORD MODE t...

Страница 22: ...tton the tracks will stop recording but tape motion will not be interrupted and the READY pre selection will be maintained 5 11 SAFE When pressed the individual channel SAFE buttons illuminate a stead...

Страница 23: ...all the other channels to switch to LINE This can be changed on special order so that the other channels mute instead of switching to LINE Any amount of channels may be soloed simultaneously In order...

Страница 24: ...PEED Do not release the selector button but hold it down In this position the TAPE TIMER display will change over to 4 digits which express the actual tape speed according to the following formula 100...

Страница 25: ...0902 13 66 8 93 3 4 tone 0920 13 89 7 41 0937 14 11 5 93 1 2 tone 0940 14 15 5 66 0953 14 33 4 49 0960 14 42 3 85 0969 14 55 3 01 1 4 tone 0980 14 71 1 96 0985 14 78 1 48 1000 15 00 0 1015 15 23 1 52...

Страница 26: ...ne 1450 27 27 9 09 1451 27 32 8 93 tone 1460 27 78 7 41 1468 28 22 5 93 tone 1470 28 30 5 66 1476 28 65 4 49 1480 28 85 3 85 1484 29 10 3 01 tone 1490 29 41 1 96 1492 29 56 1 48 1500 30 00 0 1507 30 4...

Страница 27: ...The signal from this extra sync output is available independently for each channel at a separate plug This output is unbalanced and should not be terminated with less than 10 kOhms The SYNC OUTPUT doe...

Страница 28: ...When mains is switched on and off the taperecorder always comes back to the same speed Change between the two nominal speeds can only be done in STOP MODE TRANSIENT PROTECTION To avoid strong switch o...

Страница 29: ...previous circuit allows the machine to be controlled from an external source or synchronized with other machines or equipment SYNC OUTPUT This facility 5 17 is most useful for effects purposes for exa...

Страница 30: ...RD The A and B displays can be loaded from TAPE POSITION as well as from KEYBOARD while TAPE POSITION only can be loaded from KEYBOARD If TAPE POSITION is different from A or B or KEYBOARD it is possi...

Страница 31: ...e the KEYBOARD display to show the tape speed in relation to 15 ips With deviations less than 5 in tape speed the error will be less than 0 2 With greater deviations table 3 will be able to show which...

Страница 32: ...greater than 16 no storing will take place NEXT Pressing this key will make the second digits of the KEYBOARD display contain a number 1 greater than last time this key was pressed First time after po...

Страница 33: ...13 89 27 78 7 41 Q937 14 11 28 22 5 93 112 tone 0940 14 15 28 30 5 66 0953 14 33 28 65 4 49 0960 14 42 28 85 3 85 0969 14 55 29 10 3 01 1 4 tone 0980 14 71 29 41 1 96 0985 14 78 29 56 1 48 1000 15 00...

Страница 34: ...line plugs DIP plug 1 supplies power to the TPC 2 receives information from the tape deck and transmits commands to the tape deck 3 transmits TAPE POSITION number and tape deck status for use in a sl...

Страница 35: ...al processor A pulse on the WRITE line will store the content of the data bus sent by the central processor in the latch In the four KEYBOARD digits the input to the decoder can be switched between th...

Страница 36: ...KEYBOARD The purpose of the KEYBOARD PCB is to convert the various commands into data on the data bus The numeric keyboard is organized in a matrix Transmitting 0001 on the data bus and pulsing the K...

Страница 37: ...e but here to route INCMRAM1 as read pulse and OUTCMRAM1 as write pulse Three write and one read commands are address decoded on this pcb and then taken to the edge connector DISTANCE HIGH write comma...

Страница 38: ...ed pulse arrives every second at nominal tape speed the counter will count down to 1000 At higher tape speeds the number will be higher at lower tape speed the number will be lower The output of the l...

Страница 39: ...he command latch The output of the latch is then levelconverted from 15 V CMOS to 24 V the tape deck control voltage The four outputs correspond to following commands Databus 1 STOP command 2 START co...

Страница 40: ...pulses are shaped in Schmitt trigger NAND gates The shaped pulses are AND ed to give a pulse out independent of direction This pulse is used to trigger the retriggerable oneshot connected to the stat...

Страница 41: ...matically transmits either 00000000 or 11111111 The 8 bit distance is fed to a digital to analog converter AD7520 with a buffer amplifier 1 4 LM324 The analog distance voltage is offset adjusted in an...

Страница 42: ...arly that the time to complete a search is unnecessary increased 6A 6 CENTRAL PROCESSOR MODULE The CENTRAL PROCESSOR module is the heart of the TPC It consists of a 4 bit microprocessor Intel 4040 a c...

Страница 43: ...1978 07 01 TR532 6A 6cont...

Страница 44: ...ape position number in a slave display 6A 8 ADJUSTMENT PROCEDURE FOR TPC The TPC contains in all 5 adjustments They are all located on the INTERFACE module and they are accessible when the TPC is lift...

Страница 45: ...eed influence adjustments P4 operating at 15 ips and P5 at 30 ips P4 should always be adjusted before P5 otherwise the procedure is the same They are adjusted as a compromise between overshoot when se...

Страница 46: ...mounted on two columns at the rear of the machine If desired the VU meter panel can be removed and placed anywhere convenient max cable length 10 m 6 4 MOUNTING FACILITIES FOR EXTERNAL EQUIPMENT The t...

Страница 47: ...dard search function With TPC three preset tape positions can be searched and also automatic recycling can be done between two tape positions The TPC also features a memory where 16 different tape pos...

Страница 48: ...of the long spring with the tape moving in PLAY MODE so that the tape tension measured after the CAPSTAN PINCH ROLLER is 225 p 10 Check the tension arm pressure as follows Remove the screw and cover...

Страница 49: ...REEL PLATFORM HEIGHT ADJUSTMENT DRAWING 7 01 1977 05 01 TR532...

Страница 50: ...after the HEAD BLOCK adjustments are made section 7 7 with the tape running CAUTION When making these adjustments be very careful to remove the adjustment key from the roller before pressing the START...

Страница 51: ...nected 275 325 p Tape tension measured in front of playback head 225 10 SERVOARM RIGHT 275 325 p Tape tension measured after capstan pressure roller 225 10 Capstan pinch roller 2 kp 20 measured as sho...

Страница 52: ...1977 05 01 TR532...

Страница 53: ...BRAKE BAND 1978 08 01 TR532...

Страница 54: ...ake up side As there exist reels with flanges of various thickness this adjustment must be done whenever changing to a new type of reel The adjustment procedure is simple Insert a long 3 mm Allen key...

Страница 55: ...1980 01 10 TR 532 7 8 1 cont...

Страница 56: ...y All guide rollers must have correct perpendicularity see section 7 6 The height of the rollers shall be adjusted so the alignment template is as close as possible to the lower edge of the roller se...

Страница 57: ...not be fully perpendicular In rest position it shall lean SLIGHTLY towards the top of the capstan shaft When the pinch roller is manually pressed against the capstan shaft the top of the pinch roller...

Страница 58: ...tension observe the tape travel and make sure the tape is within the three guides in the headblock If not 1 If the tape tries to travel upwards adjust roller no 6 The top of this roller shall be adjus...

Страница 59: ...1980 01 10 TR 532 7 8 1 cont...

Страница 60: ...ches the rest position or stops along the way If it stops along the way then gently loosen the setscrews and let the arm swing in to its rest position Press against it thereby compressing the end of t...

Страница 61: ...LEFT TENSION ARM ASSEMBLY 1977 05 01 TR532...

Страница 62: ...1978 08 01 TR532...

Страница 63: ...the tacho disc and the phototransistor tube about half a mm below Connect an oscilloscope across the output from the preamplifier live orange ground brown and check the shape of the resulting square...

Страница 64: ...1977 05 01 TR532...

Страница 65: ...O SYSTEM card below the tape deck controls the maximum power to the reel motors and the crossover point for the WIND SPEED CONTROL on the tape deck Put the machine in WIND with the WIND SPEED CONTROL...

Страница 66: ...f the tape below which the TACHO LOGIC circuit determines that the tape has stopped when the machine goes from the WIND function into START or RECORD This is done in order to protect the tape so that...

Страница 67: ...same figure as that which appears on the TIMER display a Connect an oscilloscope to pin 7 on IC 30 and adjust the DC OFFSET potentiometer so that the trace on the oscilloscope screen tends to oscilla...

Страница 68: ......

Страница 69: ...ntinue this procedure till the best compromise adjustment is reached 7 27 COARSE HEAD adjustment NOTE This adjustment is only necessary when a head stack has been replaced HEAD BLOCK adjustment drawin...

Страница 70: ...ignment will cause the trace on the oscilloscope to open out into an ellipse Adjust the azimuth of the head accordingly using screw 5 Then disconnect the output of track 2 and substitute with track 3...

Страница 71: ...TAPE in the same manner as for the PLAYBACK head After the FINE ADJUSTMENT procedure has been completed check that the RECORD and PLAYBACK heads do not make contact with the fixed mumetal shield aroun...

Страница 72: ...HEAD BLOCK 1977 05 01 TR532...

Страница 73: ...bed for one speed 15 ips since the procedure is identical for the two speeds It is assumed that the heads have been demagnetized and adjusted according to section 7 28 7 30 PLAYBACK REPRO LEVEL ADJUST...

Страница 74: ...hese adjustments points 5 8 should be repeated as many times as necessary to obtain a flat frequency response At last check points 2 and 3 and if necessary readjust SYNC ADJUSTMENTS are similar to REP...

Страница 75: ...as may vary according to the type of tape used for optimum results If in doubt refer to the tape manufacturers specifications 7 32 RECORD LEVEL ADJUSTMENT 1 Still with the blank tape and recording on...

Страница 76: ...JUSTMENT Apply a 3 kHz square wave at approx half SSL to LINE IN monitoring LINE OUT with an oscilloscope Adjust P5 PHASE SHIFT to obtain the best square wave response see fig undercompensated correct...

Страница 77: ...rd a piece of tape with 1 kHz SLL 6 dB Rewind go to RECORD again and measure with the selective voltmeter set to 1 kHz at LINE OUT in REPRO mode Adjust ERASE CURR until specification is met 7 34 VU ME...

Страница 78: ...a Select REC on channel under adjustment LINE IN no LINE signal b Connect oscilloscope to output of output amplifier pin A14 c Adjust L7 for min bias leakage 3 REPRO PREAMP BIAS FILTER a Select RECOR...

Страница 79: ...AM 77 RECORD PLAYBACK AMPLIFIER 1977 05 01 TR532 7...

Страница 80: ...7 1 1 Audio amplifier block diagram 1977 05 01 TR532...

Страница 81: ...CAPSTAN MOTOR 1977 05 01 TR532...

Страница 82: ...1977 05 01 TR532...

Страница 83: ...adjusted with a potentiometer in the CAPSTAN PREMAPLIFIER The preamplifier is connected to code 2 card with a 4 pin connector for both signal and power 8 3 FREQUENCY DETECTOR code 2 card diagram 8605...

Страница 84: ...t mode and only to take place at stop and fade out after final braking 8 4 1 ACCELERATION CONTROL IN CAPSTAN MOTOR Code 3 print board 72 143 capstan motor control drw 8436 5 consists of two adjust pot...

Страница 85: ...ced voltage exceeds the admissible value point 7 goes high the exact limit is determined by the potentiometer P1 Point 7 is connected to print 69 025 in the tape deck at point 51 where it causes trans...

Страница 86: ...echanical brakes have taken over the servo tension fades out according to the zener diode ZF4 3 and the 220 F condenser in parallel with it 8 6 WIND SPEED LIMIT CIRCUIT An addition to the tachometer l...

Страница 87: ...r voltage but point C will keep transistor 4 cut off Only transistor 6 will switch on and connect the mains to the TAKE UP motor When the tape stops or is moving very slowly point V will drop to 0 2 V...

Страница 88: ...m the capstan solenoid via the remote plug point 7B to the MASTER COMMAND PRINT point 17 but short circuited by a transistor in the zeroswitchprint placed behind the electrolytic capacitors until corr...

Страница 89: ...The filters are a double type of which only one half is used at a time After both ends have been used dirty filters are either exchanged or vacuum cleaned The filters should be checked at least once...

Страница 90: ...TS 8 14 TENSION ARM POTENTIOMETER REPLACEMENT drawing No 7 06 Unlock arm C and remove mounting screw M Unsolder the two leads to the potentiometer and pull down gently on the pot its mounting plate K...

Страница 91: ...x x Active Neutral Activated short time z Active until 1 2 sec after start and then neutral u Mains switch with light relay active without light relay active Relay 1 start Relay 2 record Relay 3 wind...

Страница 92: ...1979 10 01 TR532...

Страница 93: ...1977 05 01 TR532...

Страница 94: ...1977 05 01 TR532...

Страница 95: ...Drawing 8 01 1977 05 01 TR532...

Страница 96: ...Drawing 8 02 1977 05 01 TR532...

Страница 97: ...h Esso NUTO HP 32 Oilcan mini Belzer with ROCOL molybden oil Bottle of cleaning fluid Bag of Q tips Remote control unit extension card Testcable 1 5 m coax with jack and banana plug 454A 6691D Templat...

Страница 98: ...FX 1011 202 64L 6966 Pull spring for shield for magentic heads 0 ring for adaptor Gaco R 4225 P5 0 ring for stop for press in roller Gaco R 3106 Winding motor Papst Ro 52 80 6 Bl97 55D 6958 3 Brake ba...

Страница 99: ...Regulator 3x 24 12 12 5 4F 9870 Printed circuit complete Servosystem 4F 8520 4 Printed circuit complete Tacho Logic 7C 8439 Printed circuit complete Tape Timer Logic 4F 860513 Printed circuit complet...

Страница 100: ...used for doubletracking by increasing or decreasing the difference between head delays to around 15 to 25 ms For single shot repeats a second machine is not necessary Instead the normal mix is taken f...

Страница 101: ...Drawing 10 01 1977 05 01 TR532...

Страница 102: ...r customers who record time code on one track for synchronizing this may be inconvenient For permanent cancellation of the muting function on a specific channel proceed as follows Remove the front pan...

Страница 103: ...NIT Unscrew the two locking screws on the Commander Print 75 231 diagram 8905 to be modified Pull out the print Unsolder or cut out diode D4 and leave the circuit open at D4 Install a 10 kOhm resistor...

Страница 104: ...1977 07 08 TR53 TR532 10 3 cont...

Страница 105: ...1977 07 08 TR53 TR532 10 3 cont...

Страница 106: ...AMP pin 5a to pin 16 on the SEARCH LOGIC Connect the START LAMP pin 1c via a diode also to pin 16 on SEARCH LOGIC Terminate the two diodes to ground through a 2K2 resistor Install a switch and connect...

Страница 107: ...r group 1 to SOLO and REPRO Group 2 Select tracks for group 2 to SOLO and LINE Group 3 Remaining tracks now automatically belong to group 3 RECALLING GROUPS After programming only group 1 is active Pr...

Страница 108: ...ROUPS After programming only group 1 is active Provided no signals are routed to the recorder group 2 will be silent as it is switched to LINE Group 3 is electronically muted To recall group 2 simply...

Страница 109: ...mply press the MASTER REPRO button This will switch group 2 from SOLO LINE into SOLO REPRO and these tracks are added to group 1 To recall group 3 press the DEFEAT button which will cancel the SOLO fu...

Страница 110: ...lifier adjusted for 15 ips NAB when using a 15 ips CCIR test tape Ereq Relative output in dB 1 kHz 0 20 2 kHz 0 68 4 kHz 1 63 6 3 kHz 2 26 8 kHz 2 52 10 kHz 2 70 12 5 kHz 2 83 14 kHz 2 88 16 kHz 2 93...

Страница 111: ...connector at the bottom to the left Pull out the control box from the rear 2 On the power stabilizer assembly located on the reat plate behind the m metal box with the power transformers change the re...

Страница 112: ...out of the cabinet by unscrewing four Allen screws in the rear 2 Remove the front plate by dismounting the two varispeed knobs take off the lid first and unscrewing the six eight in the TPC screws ho...

Страница 113: ...ore correct tape speed is obtained tape loop will appear at the right hand servo arm To improve the start up characteristic the following modification has been made The code 1 servo system print can e...

Страница 114: ...sary for Pl B Turn potentiometer P7 wind power to its middle position C Turn potentiometer P8 start power time clockwise to about of maximum D Thread tape in the normal tape path with the exception th...

Страница 115: ...ith your hand and adjust P7 wind power so both servo arms rest in their middle positions Check the adjustment by running the tape back and forth The sensor arms should tend to stay in their middle pos...

Страница 116: ...together and with a wire be connected to the emitter of the new transistor BC214 5 To install the new transistor drill a hole for the emitter Base and collector can be mounted in existing holes 6 Coll...

Страница 117: ...1978 05 01 TR532 11 5...

Страница 118: ...1978 05 01 TR532 11 5...

Страница 119: ...1978 05 01 TR532 11 5...

Страница 120: ...1978 05 01 TR532 11 5...

Страница 121: ...varispeed to nomspeed a discharging of C2 will start but through point 9 and master commander point 22 and P1 fine P2 coarse R38 750e to point 19 and back to code 2 point 11 TS2 will be kept in varisp...

Страница 122: ...mp connectors We have recently experienced some cases of intermittent bad connections between the wire and the AMP connector As it concerns the main power supply a number of symptoms can occur and usu...

Страница 123: ...of the lamp driving the tape timer logic the circuit controlling the lamp needs the following change on code 7 tachometer logic print 1 Remove resistor R3 33 Ohm 2 Remove jumper connecting lamp connec...

Страница 124: ...PCB wire connected to pin B13 as close to the connector finger as possible and in the other end as close to the 33e resistor as possible and substitute the PCB wire with a short piece of shielded cabl...

Страница 125: ...ient suppression install two filter capacitors 1 F 35V and 10 F 16V tantal capacitor on the integrated 5V regulator LM309 LM340 5 Remote control type TPC has one regulator Remote control type RCU has...

Страница 126: ...activate the mechanical brakes c Press forward wind When tape reaches full wind speed press stop Repeat this in rewind Alternatively wind and rewind about 5 to 10 times in each direction d The felt br...

Страница 127: ...hand servo arm when right hand reel is full of tape If any tape loop appears during the servo arm traveling in acceleration period damping is too high If any tape loop appears after the servo arm tra...

Страница 128: ...relay If this delay is too small the SYNC signal will be turned off abruptly by the relay instead of softly by the FET switch As the collector of TS26 goes high the relay will be activated c in fig 1...

Страница 129: ...s selected the upper FET has a low resistance to feed the signal through while the lower has a high resistance not to load the signal When deselected the upper FET has high resistance to prevent the s...

Страница 130: ...erased but it will not be recorded producing a hole in the signal on tape To overcome these problems an add on circuit has been developed This circuit will delay the control voltage to R122 TS37 and...

Страница 131: ...he timing of the noise reduction switching can only be matched to the delay circuit if the new computer controlled remote control unit type ATC is used 1 Mark the position of the mounting hole on the...

Страница 132: ......

Страница 133: ......

Страница 134: ...pcb wire running on the component side and install a film capacitor of 470 nF 2 An increase of C59 from 470 nF to 2 2 F point B will extend the low frequency range of the amplifier However do not mak...

Страница 135: ......

Страница 136: ...n be improved by changing some components The table below shows present values as well as values for improved performance The zener diodes D44 and D52 are listed as they in some series have a differen...

Страница 137: ...t may be substituted by type PZ4 A2615 or A2626 which is a 24 V version of the same relay if a 6 2 V zener diode is installed in series with the relay coil Drill two holes and install the zener diode...

Страница 138: ...ontrol type ATC Press NOM speed Adjust for display reading of 3000 P2 MAXIMUM VARISPEED ADJUSTMENT Select maximum varispeed Remote control type RCU Press VARI speed Adjust for display reading of 1750...

Страница 139: ...ODE 3 test point CODE 4 POWER 5 12 12 3 x 24 VOLT DIAGRAM 8497 Adjust each voltage with voltmeter connected to REAR side of big resistors and ground CODE 7 TACHO LOGIC DIAGRAM 8520 4 P1 TAPE MOTION SE...

Страница 140: ...the tape deck VU meter panel 6 Turn the capstan tacho lamp to a position where it will not hit the glass disc 7 Slacken the two Allen screws at the lower part of the flex coupling between motor and t...

Страница 141: ...part no 311303 had a diameter of 9 mm 11 The phototransistor tube must be released and withdrawn to a lower position before re assembly to secure the glass disc during mounting 12 The capstan shaft ha...

Страница 142: ...et to middel position 14 ADJUSTMENT OF CAPSTAN TOP BEARING CAUTION Make sure the capstan top bearing is properly lubricated before mounting Connect a DC voltmeter or oscilloscope between ground and mo...

Страница 143: ...crews holding the square plate with the motor tacho pre amplifier lamp and photo transistor tube Remove the whole assembly MOUNTING OF NEW DISK TYPE CAPSTAN MOTOR 7 Mount the tacho pre amplifier and t...

Страница 144: ...amplifier and check the shape of the wave form Adjust by turning the photo transistor tube to obtain the best square wave and at least 4 volt peak to peak level Adjust Pl for a 1 1 mark space ratio T...

Страница 145: ...which has the same specifications except for power dissipation In all Lyrec applications the MJE 2955T may be used directly without exceeding the maximum ratings but it should be noted that pins are...

Страница 146: ...554 A2 NA RECORD PLAYBACK AMPLIFIER AM77 1039 A1 NA COMPONENT LOCATION FOR RECORD PLAYBACK AMPLIFIER AM77 1040 A2 RECORD EQUALIZATION 1037 A4 RECORD EQUALIZATION 1070V0 A3 RECORD EQUALIZATION 1070V1 A...

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Страница 195: ...veryone From the archives of Analogrules com and AudioSchematics com If you have paid anything for this Manual or Schematic You have been RIPPED OFF Demand your money back And let us know who is steal...

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