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TCI Library  www.telephonecollectors.info 

Содержание DCR-1

Страница 1: ...Dz an ic Model DCR 1 ISSUE E JULY 1957 DESCRIPTION INSTALLATION CO NNECTION AND MAINTENANCE INFORMATION ELECTRONIC SECRETARY INDUSTRIES INC 1101 So Prairie Ave Waukesha Wisconsin TCI Library www telephonecollectors info ...

Страница 2: ...ENERAL OPERATING PRINCIPLES WITH 8 SCHE MATIC DRAWINGS DESCRIPTION OF BASIC COMPONENTS GENERAL MAINTENANCE PROCEDURE SUMMARY OF MAINTENANCE CALLS AND SUG GESTED MEASURES FOR HANDLING TABLE OF VOLTAGE READINGS ADJUSTMENT OF RECORD PLAYER MECHANISM ADJUSTMENT OF WIRE RECORDER MECHANISM PARTS LIST TCI Library www telephonecollectors info ...

Страница 3: ...TCI Library www telephonecollectors info ...

Страница 4: ...rd is the timer for the entire operation The wire recorder which starts immediately following the tone signal will accept messages up to a total of about 60 minutes after which the machine will not respond to incoming calls The automatic restoral of the record player arm after completion of the sign off message electrically resets the machine releasing the line for the next incoming call 2 TRANSPO...

Страница 5: ...below is completed Use suitable protection to avoid marring desk tables etc Prepare a suitable cable with 3 insulated wires preferably of red green and yellow colored insulation Fasten the cable to the terminal block of the Electronic Secretary connecting the red wire to L 1 the green wire to L 2 and the yellow wire to ground Connect the opposite end of the cable to the telephone block as indicate...

Страница 6: ...e machine permits a message cycle to exceed 3 minutes c Place a spool of recording wire on the small spindle of the wire recorder Pull out the plastic leader lead it past the recording head and wrap it around the channeled groove in the large take up drum Make certain that the wire is in the groove of the recording head and that the reset button on the top of the wire recorder is de pressed Move t...

Страница 7: ...until the indicator returns to 0 0 f Move the toggle switch to the extreme right or Play back position operate Automatic Stop Reset button and advance the Volume control to check for record ing of received message and for sufficient playback volume g Erase the test message by rewinding the wire with the erase button depressed until the elapsed time indicator shows 0 0 h The machine is now in the c...

Страница 8: ...he machine is performed by two simple switches attached to the record player the duration of the operating cycle is determined by the length of time to which the record is cut From the above observation we learn that all that is re quired to place the machine into operation would be to apply cur rent when the telephone rings to the record player motor for a period long enough for it to close its o...

Страница 9: ...MF OIMF I KV R4 A AUTO STOP RESET SW WIRE RECORDER 1 EAD SOCKET SWITCH c II r RECORD REPRODUCE HEAD z a J Q NEOI RI 117 1 60N l l E i Ol _____ E NOTE Relay contacts are read from left to right facing terminal board of relay A contacts to the left and B contacts to the right TCI Library www telephonecollectors info ...

Страница 10: ...CR 1 Complete Schematic Drawing 51 ERASE SWITCH Q WIRE RECORDER MOTOR SOCKET IMPORTANT Relay 9 has been removed from this model See Page 48 for schematic drawing with Relay 9 and description RESET r 7 PHONO MOTOR PLUG PHONO MOTOR a e H X s Ji1ti CH Y c _ _ _ _ _ OUTGOllG MESSAGE REPEATER WIRING DIAGRAM 9 TCI Library www telephonecollectors info ...

Страница 11: ... position of the selector con trol switch current will of course be brought to the coil of relay 8 and the neutral path to relays 3 and 6 will be broken We see however that in the automatic position closing of the contacts of relays 3 and 6 will in effect answer the phone in the following manner Referring to diagram S we see that in the stand by automatic position contact 3b of relay 3 is connect ...

Страница 12: ... n CISCft COIL I 2 0MF 100 A ILECIRONIC SECRETARY Model DCR 1 Answering and Line Loading Functions Drawing 52 aMll ll l UTl R TCI Library www telephonecollectors info ...

Страница 13: ... a junction point where it goes in one direction through an 01 condensor to the audio output stage 6AQ5 and through an 001 condensor to the relay tube 6AU6 It is the function of this latter tube in which we are now interested in order to obtain CR action which in ordinary English means A Starting and stopping the wire recorder mechanism at the proper time B Muting the outgoing message at the prope...

Страница 14: ...1 a Mf I OOA RC _L Outgoing Message a nd CR Relay Amplifier Functions Drawing 53 t I RE CORO oua osc Ht co1L x 0 g I I a JI H n IOM f v HEA_ E ___ CJs q IJ l F __ il a 1 1 l l 1 _ 4 I 4 f l f9tw TCI Library www telephonecollectors info ...

Страница 15: ... and cam to return plus open ing the CR MU switch See diagram S7 This stops the wire recorder motor de energizes relays 4 and 9 thus restoring the activity of the outgoing message amplifier and terminating the record and erase conditions The closing message now comes off the record disc and the tone arm finally traverses the throw out grooves of the record and the record player resets itself This ...

Страница 16: ... 1111 RECORD REPRODUCE HEAD osc i t R COi L ti u 2 0MI ELECTRONIC SECRETARY Model DCR 1 Record and Erase Oscillator Functions Drawing 54 a 5 S 11tt r J 1 t IJ 1 tt m TCI Library www telephonecollectors info ...

Страница 17: ...AQ5 where it will attain a very high level of voltage and power and will transfer this energy through its output transformer whose secondary will now be connected to the voice coil of the speaker through the normally closed contact relay 3a To get the complete picture electrically of playback action we can refer to diagrams S5 and S7 We have thus far accounted for the action of relay contact 5a an...

Страница 18: ... i_ ILICTRONIC SECRETARY lt oclel DCR 1 Playback Amplifier Functions Drawing SS C J SPEAKER OJMf lt I 4 i i 4 a AlllOSTCP RESETSW D_ I rw 81 I IOlllF v IHCOlllWl li i AMRECOAOER l 1 l l n rw I 1 1 ra OUTGOllG lo SMGE REPEATER WIAING DIAGRAM TCI Library www telephonecollectors info ...

Страница 19: ...s the motor is allowed to develop itli approximate full speed before the reversing solenoid is energized The electrical pro cedure of this is as follows from diagram 6 When the main control switch is thrown to the left or re wind position the CR motor shown at the left of the diagram will be energized by direct action from the power line through the main contr ol switch This action will after a se...

Страница 20: ...LECTOR SWITCH ELECTRO tlC SEtREr A y Model DCR 1 2 0MF Power Sup y Drawing 56 100 n ________ CJstt i ER AUTOSTO RESET SW D c L a HLI I I R6 B tOMF 4 0V n AM RECORDER 1 r f T 1 i i fli o OUTGOllG ME SSMZ R 1 ATDI NG DWlAAM TCI Library www telephonecollectors info ...

Страница 21: ...TOR SWITCH a ow IOO A ELECJRONIC SECRDARY Model DCR 1 Rc Br Electrical Functions Drawing 57 d i 1 l P l 1 5 g i J J I 3 o COR DUCE 1 bX D r OUTGallG MESSAGE REPEATER WIRING DIAGRAM TCI Library www telephonecollectors info ...

Страница 22: ...MOTOR PLUG TO AC NEUTRAL K 11 CR TIMER ELECTRONIC SECRET ARY Model DCR 1 Pictorial Electrical Drawing 58 L EFr REWIND CENTER AUTO MATIC RIGHT PLAYBACK 0 POWER TRANSFORMER AC NEUTRAL R 1 RECORD PLAYER y x MU SWITCH TCI Library www telephonecollectors info ...

Страница 23: ...laces current on the record player motor and the safety timer motor If the duration of ring is sufficiently long the record player turntable will spin until the tone arm positions itself onto the lead in groove of the record About this time two small mu switches are mechanically closed starting an operating cycle The first of these two switches x form a holding circuit around the contacts of relay...

Страница 24: ...ecord phase and the tone signal and outgoing amplifier is muted thru auxiliary relay action Basic Component 3 The Safety Timer The safety timer is a secondary timing device built into the electronic secretary to insure the continuity of telephone service in the event of mechanical or electrical failure on the part of the electronic secretary This device like the CR mechanism con sists of a spring ...

Страница 25: ...voice coil winding of the outgoing message amplifier to the voice coil of theloudspeaker However when the mu switch on the record player closes the relay is en ergized and contact 3 b switches the telephone line across the secondary of a 10 1 recording transformer which is in series with the voice coil winding of the out going message loud speaker transformers and contact 3 a throws the other end ...

Страница 26: ... becomes energized at the beginning of an automatic cycle Contacts 6 a close the neg ative return and provide plate voltage at the beginning of an auto matic cycle Contacts 6 b provide plate voltage for the CR re lay on automatic operation when the machine goes into cycle Relay 7 This is an alternating current relay Relay 7 is operated by the selector switch in the playback and rewind positions an...

Страница 27: ...gs are readily accessible To work on the under side of the chassis we need only remove the record player and the wire and drum from the wire recorder mechanism and we turn the entire chassis upside down In this position we can take out the three machine screws and remove the base panel Standard electrical and electronic procedure is then fol lowedas indicated other places in this manual Items to b...

Страница 28: ...nism removed and with test extension connector leads used to duplicate normal operating conditions Photo shows the same anangement but with the chassis inverted so that all under chassis components can be observed under operating conditions TCI Library www telephonecollectors info ...

Страница 29: ...al edges of the record player turntable and also the rubber drive pulleys with Denatured Alcohol This will usually remedy the slipping and restore normal traction to the s e components For more detailed information refer toChapterVII Adjustments of the Record Player Mechanism Inspect Relay 2 to see if contacts are sticking be cause of arcing or for any mechanical reasons If such is the case replac...

Страница 30: ... cartridge if output is found to be too low Outgoing message Defective stylus in car Check and replace cartridge needle or both distorted tridge or out of saddle Tone signal is Caused by insufficient Replace either weak cartridge or defective 5751 continuous over gain in CR circuit re 12AX7 5814 A 12AU7 or 6136 6AU6 tubes telephone line and sulting in failure of wire recorder CR relay to pull in d...

Страница 31: ...35 6 8 62 2 2 80 75 85 4 5 160 160 23 VOLTAGES 80 75 85 65 60 2 3 210 215 11 Record Amplifier Record Gain Control Full 400 Cycle Signal From 600 OHM Generator Output Loaded With Head Input To Terminal Block Do Not Ground One Side Oscillator Tube Out 1 2 12AU7 Record Amplifier Grid Pin 7 1 2 12AU7 Plate Pin 6 Through Coupling Capacitor At Record Head Record AMP Has Overall Gain Of 2 6 to 3 Reading ...

Страница 32: ...lide bar has moved to its furthermost position toward the turntable shaft In this position the tone arm has been lowered and is free to fallow the grooving of the record B The backward and in between positions where the ec centric wheel and its associated slide plate are in motion the tone arm is not free but is being guided through a path determined by the mechanical camming and levering actions ...

Страница 33: ...ter closing message and should not have to be re set The only Instance where adjustment might be needed Is when a record Is used that has a 2 mlnute time cycle or more In which case tone arm may reject before closing message is completed Backing off of this adjustment Will make the tone arm reject later 5 BRAKE INTERVAL ADJUSTMENT This adjustment controls the length of time that the brake will be ...

Страница 34: ...f record Tone arm does not tract properly skips grooves in record Erratic indexing tone arm sometimes does not set down on edge of record but off the record Probable Cause Too much brake tension on turntable Not enough brake tension on turntable Momentum of motor causing tone arm to drift too far Gap between bay in ec centric drive wheel and knurled coupling too small Gap between bay in ec centric...

Страница 35: ...rd Adjustment Remove plug from topside of motor board as shown in Figure 5 This permits visible access to top end of motor shaft Now loosen machine screws hold ing motor frame assembly to bracket attached to motor board Position motor so that shaft is centered in well and tighten screws Cause 3 Sticking of the rocker arm assembly caused by friction developed between stabilizing bar refer to Figure...

Страница 36: ...MENT SCREW I FIGURE 2 ACTION OF ROCKER ASSEMBLY ROCK ER ASSEMBLY TAKEUP ORUM JI TURNTABLE I NT E RM ED I ATE ouaaER LLEY 0 MOTOR SHAFT FIGURE 3 OPERATION OF RUN Section 0 0 0 0 35 TCI Library www telephonecollectors info ...

Страница 37: ...IZER BAR I LOCK SC E ADJUSTMENT SC Ew DOUBLE AIM RUDBEA PULLEY FIGURE 4 OPERATION OF REWIND I NTe RM D I ATE ALUMINUM PULLEY DRIVE PULLEY FIGURE 5 TOP VIEW WIRE RECORDER 0 0 TCI Library www telephonecollectors info ...

Страница 38: ...rance of 006 Cause 2 Insufficient end play in rewind pulley shaft assem bly shown in Figure 1 as RPSA Adjustment Loosen Allen set screw on worm gear coupling and set for 006 play Cau_se 3 Too_ much friction or too deep mesh between the worm gear and fibre gear train Adjustment Remove bakelite switch cover housing on top of motor board by taking out three Phillips head screws This makes available t...

Страница 39: ... slot in the recording head should be approximately 020 above the motor board If the wire is too high or too low with respect to the motor board it may be adjusted by slight bending of the level wind slide 2 The reset switch arm which is fastened to the top of the switch housing should be 15 32 from raised section on the motor board under switch lever finger This maybe adjusted by bending the arm ...

Страница 40: ...e passes by it The actuating device for opening or triggering the switch is a small metallic peg which extends across and just above the normal path of the wire as it travels from one spool to the other Attached to this tripping peg is a small rectangular plate which is free to travel around a mounting post but assumes a centered position because of the equalizing force of a tiny hair pin spring P...

Страница 41: ...I I u a o c c u u co t U lllw o u Vi Cl z 0 0 E u Ill Ill 40 TCI Library www telephonecollectors info ...

Страница 42: ... Vs V4 II l t w 1 I I l e c 5 l A 1 VJ RELAY 5 cj JO r t ELECTRONIC SECRETARY MODEL DCR 1 UNDERSIDE VIEW OF CHASSIS TCI Library www telephonecollectors info ...

Страница 43: ... 600V 30 R 100 Relay AC DPDT 115 V 2 circuit 47 C 251 Hicap condenser 01 Mfd 600V 30 R 400 Relay DC 2500 Ohm coil N O 47 C 252 Hicap condenser 02 Mfd 600V SPST 17 1550 Hicap Condenser 01 Mfd KV 35 R 100 Resistor Carbon 100 Ohm 1 2 Watt 17 1549 Hicap Condenser 02 Mfd KV 10 47 C 300 Tubular ceramic condenser 1 35 R 101 Resistor Carbon 220 Ohm 1 2 Watt Mfd 600V 10 47 C 301 Tubular ceramic condenser 0...

Страница 44: ...ad machine Cad plate Screws 8 32 x 2 1 2 round head machine Cad plate CHART REF PART NO 20 S 301 20 S 302 20 S 303 20 S 304 20 S 305 20 S 306 20 S 307 20 S 325 20 S 400 20 S 500 20 T 100 20 T 101 20 T 104 20 T 106 20 T 107 20 T 109 1 W 100 l W 101 1 W 102 1 W 103 1 W 104 1 W 105 1 W 106 2 W 100 2 W 101 2 W 102 2 W 103 2 W 104 Section DESCRIPTION Screws 6 32 x 1 4 round head machine Cad plate Screw...

Страница 45: ...86 65 S 108 Idler wheel retainer 88 l W 116 Spring washer for idler wheel Idler wheel 89 65 S 109 Nut 18 32 Hex 90 90 N 111 6 Split lockwasher 20 S 102 Dampening washer for idler wheel See 75 B 102 Idler wheel tension spring Page 95 S 100 Motor mounting plate complete 3 with idlei lever for 20 S 306 Rubber grommet for motor Sketches 70 S 100 mounting hole Showing Flat metal washer for mounting The...

Страница 46: ...0 1 RECORD PLAYER PARTS e e 45 TCI Library www telephonecollectors info ...

Страница 47: ... and Post Assembly 64 1 W 127 Spring 67 5 C 100 Pulley Assembly 69 75 F 100 Flat Washer 70 64 M 101 8 32 x 3 8 R H M S steel Cad 70A AlO P 116 Lockwasher Spring 70B 20 S 205 Drive Link Assembly 70C 2 W 106 Torque Adjust Assembly 70D 55 S 100 75 A20 G 101 Turntable Spring 76 1 W 127 Bracket 77 20 S 326 Keyed Washer 78 75 B 110 Felt Washer 80 59 C 100 Spring Support with Set Screw 81 20 S 301 Soleno...

Страница 48: ...WIRE RECORDER MECHANISM PARTS 47 TCI Library www telephonecollectors info ...

Страница 49: ...s called R4 B and is located between the lower left of the one half 12AU7 5814 tube and the lower right of the 6AQ5 6005 tube shown on the top half of the drawing 3 The lead from the oscillator coil has been removed from the bottom normally open 11 8 11 contact of Relay 9 and returned directly to Pin 3 of the Record Head plug The normally open contact of Relay 9 is called R9 B and is located to th...

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