JVC HR-XVC28BUS Service Manual

Also see for HR-XVC28BUC: Service manual

Contents

1-8 (No.YD052)Fig.2-3a User/Jig RCU mode2.3.1 Setting the Jig RCU mode(1) Turn on the power.(2) Press the following remocon keys continuously within 2seconds " SET UP " → " 2 " → " 8 " → " ENTER ".When the VCR is set to the Jig RCU mode, the symbols( " : " ) in the time display of the FDP are turned off.(Refer to Fig.2-3a)2.3.2 Setting the User RCU mode(1) Turn off the power.(2) Press the "REC" and "PAUSE" buttons of the VCR simul-taneously. Alternatively, transmit the code "43-80" from theJig RCU.2.4 Mechanism service modeThis model has a unique function to enter the mechanism into ev-ery operation mode without loading of any cassette tape. Thisfunction is called the "Mechanism service mode".2.4.1 How to set the "Mechanism service mode"(1) Set the VCR to the Jig RCU mode (the mode in whichcodes from the Jig RCU can be received)(2) Transmit the code "43-E5" from the Jig RCU.(3) Release the lug of the Cassette holder and then slide theCassette holder toward the direction where the Cassetteholder is loaded by manually.(4) The cassette holder lowers and, when the loading hascompleted, the mechanism enters the desired mode.When the VCR is set to the Mechanism service mode, thesymbols ("Timer") in the FDP (LED) are blinked.2.4.2 How to exit from the "Mechanism service mode"(1) Unplug the power cord plug from the power outlet.2.5 Maintenance and inspection2.5.1 CleaningRegular cleaning of the transport system parts is desirable butpractically impossible. So make it a rule to carry out cleaning ofthe tape transport system whenever the machine is serviced.When the video head, tape guide and/or brush get soiled, theplayback picture may appear inferior or at worst disappear, re-sulting in possible tape damage.Note:• Absolutely avoid sweeping the upper drum vertically asthis will cause damage to the video head.(1) When cleaning the upper drum (especially the video head),soak a piece of closely woven cloth with alcohol and whileholding the cloth onto the upper drum by the fingers, turnthe upper drum counterclockwise.(2) To clean the parts of the tape transport system other thanthe upper drum, use a piece of closely woven cloth or a cot-ton swab soaked with alcohol.(3) After cleaning, make sure that the cleaned parts are com-pletely dry before using the cassette tape.Fig.2-5a2.5.2 LubricationWith no need for periodical lubrication, you have only to lubricatenew parts after replacement. If any oil or grease on contact partsis soiled, wipe it off and newly lubricate the parts.Note:• See the "mechanism assembly" diagram of the "partslist" for the lubricating or greasing spots, and for thetypes of oil or grease to be used.2.5.3 Suggested servicing schedule for main componentsThe following table indicates the suggested period for such ser-vice measures as cleaning, lubrication and replacement. In prac-tice, the indicated periods will vary widely according toenvironmental and usage conditions. However, the indicatedcomponents should be inspected when a set is brought for ser-vice and the maintenance work performed if necessary. Alsonote that rubber parts may deform in time, even if the set is notused.C : CleaningX : Inspection or Replacement if necessaryUser RCU modeJig RCU mode( not displayed)System Parts name Operation hours1000H 2000HTapetransportDrum assembly C,X XA/C head C,X C,XPinch roller arm assembly C CFull erase head C CTension arm assembly C CCapstan motor (Shaft) C CGuide arm assembly C CDriveCapstan motor XCapstan brake assembly XMain brake assembly XBelt (Capstan) X XLoading motor XClutch unit XWorm gear XControl plate XOther Rotary encoder XVideo headsA/C head