JPS55105855A - Control unit for trace arm of record player - Google Patents

Control unit for trace arm of record player

Info

Publication number
JPS55105855A
JPS55105855A JP1240779A JP1240779A JPS55105855A JP S55105855 A JPS55105855 A JP S55105855A JP 1240779 A JP1240779 A JP 1240779A JP 1240779 A JP1240779 A JP 1240779A JP S55105855 A JPS55105855 A JP S55105855A
Authority
JP
Japan
Prior art keywords
arm
detector
voltage
trace
supplied
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1240779A
Other languages
Japanese (ja)
Inventor
Motoi Ieda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Gakki Co Ltd
Original Assignee
Nippon Gakki Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Gakki Co Ltd filed Critical Nippon Gakki Co Ltd
Priority to JP1240779A priority Critical patent/JPS55105855A/en
Publication of JPS55105855A publication Critical patent/JPS55105855A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To increase the lead-in positioning accuracy and facilitate the position setting by supplying the output of both the arm position detector and the arm stop position setter into the servo amplifier and then performing the arm driving by the output of the servo amplifier.
CONSTITUTION: The control unit comprises arm position detector 1, arm stop position setter 4, servo amplifier 8, arm driving unit 9 and others. Detector 1 is a variable resistor which detects the position of the trace arm and then generates voltage Va in accordance with shift amount L1 of slider 1a contained in arm base 2. Setter 4 sets the stop position of the trace arm and consists of resistor 5 and change- over switch 6 with the correspondence secured between the voltage of each contact of switch 6 and the lead-in position. Then voltage Vb of output terminal 7 is supplied to one side of amplifier 8, and at the same time voltage Va of output terminal 3 in detector 1 is supplied to the other side respectively. Thus differential voltage Vr is delivered and then supplied to unit 9 and level detector 10. In such way, the trace arm is shifted, put under the tracing state or under the reset state each.
COPYRIGHT: (C)1980,JPO&Japio
JP1240779A 1979-02-06 1979-02-06 Control unit for trace arm of record player Pending JPS55105855A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1240779A JPS55105855A (en) 1979-02-06 1979-02-06 Control unit for trace arm of record player

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1240779A JPS55105855A (en) 1979-02-06 1979-02-06 Control unit for trace arm of record player

Publications (1)

Publication Number Publication Date
JPS55105855A true JPS55105855A (en) 1980-08-13

Family

ID=11804399

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1240779A Pending JPS55105855A (en) 1979-02-06 1979-02-06 Control unit for trace arm of record player

Country Status (1)

Country Link
JP (1) JPS55105855A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5928269A (en) * 1982-08-07 1984-02-14 Akai Electric Co Ltd Automatic music selector of record player
FR2561424A1 (en) * 1983-11-30 1985-09-20 Pioneer Electronic Corp APPARATUS FOR POSITIONING THE READER OF A DATA READING APPARATUS

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5023610A (en) * 1973-06-30 1975-03-13

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5023610A (en) * 1973-06-30 1975-03-13

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5928269A (en) * 1982-08-07 1984-02-14 Akai Electric Co Ltd Automatic music selector of record player
FR2561424A1 (en) * 1983-11-30 1985-09-20 Pioneer Electronic Corp APPARATUS FOR POSITIONING THE READER OF A DATA READING APPARATUS
US4646278A (en) * 1983-11-30 1987-02-24 Pioneer Electronic Corporation Pick-up positioning apparatus for data playback apparatus

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