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Service Manual

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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of JVC HRJ4008UM Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

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Text excerpt from page 12 (click to view)
Loading motor board assembly Loading motor Lugs Motor guide

6.5 ± 0.2 mm

2. How to install (Centering the mounting position) When the capstan motor has once been removed and then reinstalled out of the initial correct position in the rotational direction, the capstan motor current may be unstable during operation in high or low temperatures. This may result in greater Wow & Flutter and occasionally in power breakdown because of current over - load. Install the capstan motor while following the procedure given below. (The capstan motor is centrally located when the unit is shipped from the factory.) (1) Provisionally tighten the three screws (A) securing the capstan motor. (2) Install the mechanism assembly to which the capstan motor is provisionally fastened on the bottom chassis which incorporates the Main board assembly. (No need to tighten the screws for mounting the mechanism.) Make sure that all the connectors for the mechanism assembly and the Main board assembly are correctly installed as indicated in Fig. 2-2-8b. (3) Making sure that the connector for the capstan motor is correctly mounted, and securely tighten the three screws (A). Note: ⢠When the capstan motor has been replaced with a new one, perform recording in the EP(or LP) mode for at least 2 minutes at normal temperatures immediately be-

Motor pulley Worm gear Belt

Fig. 2-2-7a 2.2.8 Capstan motor 1. How to remove (1) Remove the belt (capstan) on the mechanism assembly back side. (2) Remove the three screws (A) and remove the capstan motor.
Screws(A) Screw(A)

fore starting the FF/REW or SEARCH operations (Aging).
Capstan motor

2.2.9 Pole base assembly (supply or take-up side) 1. How to remove (1) Remove the UV catcher 2 on the removal side by loosening the screw (A). (2) Remove the pole base assembly on the supply side from the mechanism assembly by loosening the screw (B) on the mechanism assembly back side and sliding the pole base assembly toward the UV catcher 2. (3) As for the pole base assembly on the take-up side, turn the pulley of the loading motor to lower the cassette holder because the screw (B) is hidden under the control plate. (See the âProcedures for Lowering the Cassette holder assemblyâ of 1.3 DISASSEMBLY/ASSEMBLY METHOD.) Further turn the motor pulley to move the cassette holder until the screw (B) is no longer under the control plate (in the half-loading position). Then remove it as done for the supply side by removing the screw (B). Note: ⢠After reinstalling the Pole base assembly and the UV catcher2, be sure to perform compatibility adjustment.
Screw(A) UV catcher2 Screw(A)


Fig. 2-2-8a



UV catcher2

Connector for the capstan motor

Fig. 2-2-8b


Fig. 2-2-9a 2-9

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