Vcr capstan motor driver

Capstan motor control circuit victor company of japan, ltd. You dont have to spend a lot of money to control motors with an arduino or compatible board. The capstan motor was placed on its own little module and was therefore very easy to take out. Video tape recorder circuits vcr nte electronics, inc. Lb1851m 3phase dd motor driver for vcr capstan motor, package. Motor driver ics 3phase motor driver and reversible motor. All nte semiconductors are guaranteed to meet or exceed original specifications. Sometimes drops out in play or record on hitting ruffled tape so a motor problem. Lb11985h datasheet19 pages sanyo vcr capstan motor. Lb1981v portable vcr dvc cylinder motor driver, package. The capstan motor on my sony vcr has lost the war and is in need of replacement.

Testing capstan servos with the vc93 and waveform analyzer. They are usually held together simply by a circlip on the capstan at the top side of the lower bearing. An3986fbp stereo audio signal processor ics for 8mm camcorder. Reference clock options the servo logic requires a 9600 hz master reference clock that determines the capstan motor and tape speed. Control dc and stepper motors with l298n dual motor controller modules and arduino. This includes guide arms and rollers, guide pins, erase head, audio head, and capstan.

Control dc and stepper motors with l298n dual motor. Lb11885 sanyo semiconductor corporation, lb11885 datasheet. The stepbystep procedures will help you quickly isolate capstan servo problems to the defective circuit or component. Lot of 3 vintage ampex signature binding genuine 23k gold reel to reel. An3861sa sensorless motor drive ic for vtr movie cylinder. The part number lb1952 identified it as a brushless motor driver specifically for vcr capstans. Motor dc sankyo y2727a 2e07 n2 03 8ge capstan driver. An3895fhq cylindercapstan motor driver ic for video camera. The nte1809 is an integrated circuit designed for a vcr capstan direct. A similar but larger pm motor may provide power for the capstan and reel rotation and possibly multiple other functions older vcrs. Problem with panasonic agmd830e svhs vcr electronics.

The capstan motor driver uses the threephase, pseudolinear drive method, and has a builtin torque ripple cancellation circuit, and an output transistor saturation prevention circuit. Drum motor drive unit 3phase, 120 degrees full conducting soft. Hardtofind vcr parts here we list a selection of older, difficulttolocate vcr parts. The lb1980h is a 3phase brushless motor driver that is particularly appropriate for vcr capstan motor drivers. Features capstan, ratings unit ic power source voltage vreg max 6. Buy ic an3821k, vcr capstan motor drive, dil24 for 4.

This is a precisely made, muliphase, permanent magnet pm, vcr capstan driver dc motor with a pulley and sleeve bearings. An3824k datasheet vcr capstan direet motor drive circuit. Look through all of the parts due to constantly changing inventory, these parts may not all be grouped together by manufacturer. Builtin torque ripple correction circuit variable correction ratio current limiter circuit. Search results for panasonic motor results from catalog. Lb1987 datasheet117 pages sanyo threephase brushless.

Vcr capstan motor brushless motor driver, lb11985h datasheet, lb11985h circuit, lb11985h data sheet. I know its brushless because i can see the coils on the board. For some reason when i set it up with transistors to drive more power it wont respond. Check the pmc01 and the capstan does the pwm signal appear at ic501 pin77. Panasonic, alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. Lb11985h datasheet, lb11985h datasheets, lb11985h pdf, lb11985h circuit. If any of these limits are exceeded, device functionality should n ot be assumed, damage may occur and reliability may be affected. Monolithic digital ic for vcr capstan threephase brushless motor driver, lb11889m datasheet, lb11889m circuit, lb11889m data sheet. Some part number from the same manufacture sanyo semiconductor corporation. After some hunting around we found a neat motor control module based on the l298n hbridge ic that can allows you to control the speed and direction of t. Lb1851m datasheet 3phase dd motor driver for vcr capstan. Lb11885 is a threeinone motor driver for portable vcr. Integrated circuit vcr capstan, dd, motor driver description. With that title comes the probability that someone will ask you to something.

The loading motor driver has two logic inputs which. The pins on the connector on the board were also nicely. For vcr capstan motors 3phase brushless motor driver. Capstan servo controller 4840356 rtz professional audio. When a cassette is loaded into the vcr and the machine is switched on, it is this motor and its associated mechanics which drag the tape out of the cassette housing and wrap it around the drum and guide posts by rotating the entire drum assembly 200 orso degrees. Capstan servo controller rtz professional audio, llc 3 4. Nte has one of the most extensive semiconductor lines in the industry. Notes on the troubleshooting and repair of video cassette. Ics for vcr 1 an3895fhq cylindercapstan motor driver ic for video camera overview the an3895fhq is an ic designed for driving a cylindercapstan motor for a video camera. Sanyo vcr capstan motor brushless motor driver,alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. N m motor driver integrated circuits threephase, fullwave motor drivers vcr capstan, drivers vcr capstan ba6441fp figure 1 application example. Ic1 is the cylinder driver chip an3815k, and ic2 is the capstan motor drive chip ba6435s. Unfortunately, no quickeasy fix and neither is there a workaround. Lb11889m datasheetpdf sanyo semicon device, monolithic.

Features capstan motor drive unit 3phase, 120 degrees full conducting, direct pwm drive built in pwm oscillator current limiter it is fixed internally and setup externally. Functions threephase fullwave currentlinear drive torque ripple correction circuit fixed correction ratio current limiter circuit with control characteristics gainswitching datasheet search, datasheets, datasheet search site. The unit would have to be opened up for mechanical checks. To use a vcr capstan motor as an example, if you remove one from a vcr there is a large flywheel on the bottom, and the capstan sticking up through a bearing at the top. The pinch roller is a rubberized, freespinning wheel typically used to press magnetic tape against a capstan shaft in order to create friction necessary to drive the tape along the magnetic heads erase, write, read most magnetic tape recorders use one capstan motor and one pinch roller located after the magnetic heads in the direction of the moving tape. Vcr is osaki vcr 34h, no knowledge, so i dont know if correct ps voltages for a start 3 lines from the ta2620d driver ic to the coils and further ends of each are joined together but not returned to anywhere so presumably 3 phase. Because neither the cylinder nor the capstan move, it is difficult to know whether there is a problem with one chip, both chips, or neither chip if the problem is upstream of both chips. The servo loop is a closed loop system with a phase comparator which compares the servo motor tachometer. Threephase brushless motor driver for vcr capstan motors. Of particular interest for preliminary checks would be the drum motor, capstan motor, capstan belt, motor servodriver. If you have been a ham radio operator for any length of time, its probable that most of your extended family and neighbors know it. Basically, if the tape touches it, its part of the tape path and needs to be cleaned. Thorn television rentals limited, vhs recording principles. Vcr capstan motor brushless motor driver any and all sanyo products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as lifesupport systems, aircrafts.

Vintage rca selectavision video cassette recorder wremote vcr model vkt385. Motor driver ic is the matsushita m56730asp multiphase driver chip. Quite frequently you will become known as the electronics genius. It came with a small pcb with a few surface mount components, most notably a 34pin qfp. The a 3phase brushless motor drive ic ideally suited for use in vcr capstan. Based on my dejanews search on this topic, this is evidently not an uncommon occurrence. The problem is that i only know what a few pins two, to. With over 4,700 nte devices cross referenced to 384,000 industry device. Forwardreverse rotation 2 levels fg amplifier builtin.

The first item that should be mentioned in the picture below is the lacing motor. Testing capstan servos with the vc93 and waveform analyzer this tech tip explains how to use the sencore vc93 all format vcr analyzer and the waveform analyzer to troubleshoot vcr capstan servo problems. For vcr capstan motors 3phase brushless motor driver stresses exceeding those listed in the maximum ratings table may damage the device. Servo circuit 3 when the capstan motor doesnt run, when the capstan motor doesnt run, refer to smpscapstan12volt does 12va appear at pmc01. So far i have been able to drive it with my arduino. It can reduce the torque ripples, noises and vibrations of the motor. The ba6872afm has a 3phase motor driver for vcr capstans, and a reversible motor driver for vcr loading.

A capstan motor controller includes a capstan motor for moving a recording medium, a motor driver for driving the capstan motor, a capstan frequency generator cfg for generating a cfg signal according to the rotation of the capstan motor, a speed controller for generating reference pulse trains having different periods in order to control the speed of the capstan motor according to a modes. Capstan motor driver ic for vcr, an3841sr datasheet, an3841sr circuit, an3841sr data sheet. Fast shipping on all specialized integrated circuits orders within europe. Sony tcka7es 3 head cassette deck with dolby s new belts and rmj701 remote. A single low profile or pancake brushless dc motor may provide power for a direct drive capstan, reel rotation, and possibly multiple other functions.

Panasonic motor electronic parts electronic components. The video head is also included in the tape path, although the tape doesnt actually touch it. Functions 3phase fullwave drive builtin torque ripple correction circuit variable correction ratio current limiter circuit upper and lower side output stage oversaturation prevention circuit that does not require. The ba6871bs is a 3phase, fullwave, pseudolinear motor driver suited for vcr capstan motors. A capstan motor control circuit comprises a comparing circuit for comparing an instruction voltage dependent on an instructed lowspeed search mode and a rotational speed voltage dependent on a present rotational speed of a capstan motor, a circuit for detecting a rotating direction of the capstan motor and for generating a rotating direction instruction which instructs rotation in a. The datasheet for the device was very easy to find.

Lb11885 monolithic digital ic threeinone motor driver. I recently took apart an old goldstar vcr and took out the capstan motor. I know traditionally it cannot be driven without a controller. Sanyo, alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. Nte1809 integrated circuit vcr capstan, dd, motor driver. Lb1980 datasheet 3phase brushless motor driver for vcr. I think this is as far as i am going to get without a.