[TechAssist] Re: Mitsubishi-VCR mod#HS-U51C,no drum rotation UPDATE&FIX
- From: "Don Hartigan" <hartstv@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 8 May 2002 11:46:39 -0300
Tks for the i/p Jerry,you put me in the right area.On the large worm gear&PR
assy,there's a plastic spring loaded slide gear that was cracked,thus
unableing the cam gear to fully seat in the load/down position,which
probably also puts the mode switch in the wrong spot to enable
''tape-load''&play cycle.Replacing it and problem cured.The black graphic
grease was hiding the crack.Tks again Jerry & to all for there i/p's on this
unit....Don........
HARTS-TVCR''ASC''
9-Robert St.,Oromocto,NewBrunswick,CAN
Tel#506-357-9785Fax#506-357-6010
----- Original Message -----
From: "J Silverman" <greentron@xxxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, May 07, 2002 3:35 PM
Subject: [TechAssist] Re: Mitsubishi-VCR mod#HS-U51C,no drum rotation
>
> Three things to check! The front loading switches get their ground through
> the right front loading mech mounting screw - make sure it is tight. The
> reel belt can cause the symptom you describe if it slips the slightest
> amount at the instant the capstan is transferred from front loading to
reel
> drive duty. We have had good luck with the PanasonicVDVS0047 belt. Last,
> black grease on the metal post the pinch arm slides up and down on can
also
> cause the same symptom. I usually just add a little light oil rather than
> removing the black stuff.
> Jerry Silverman
> Greentron Inc
> 4 Newland Ave
> Greenville SC 29609
> 864 232 3889
> Fax 271 2080
> mailto:greentron@xxxxxxx
> ----- Original Message -----
> From: "Don Hartigan" <hartstv@xxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Monday, May 06, 2002 11:56 PM
> Subject: [TechAssist] Mitsubishi-VCR mod#HS-U51C,no drum rotation
>
>
> > Not sure if I have 2 faults on this unit or the absence of one causes
the
> other.Unit will load the ''cassette'' &emmediately unloads it; the upper
> drum does not rotate as with most vcr's upon cassette load the upper drum
> starts it's rotation before ''tape load'' starts to thread.Replaced mode
> switch,drum motor,load cage,power supply from another serviceable
unit.Also
> replaced IC502 &IC4A0.There is B+ to the drum IC,M51721.Have no print for
> this guy so anyone have a tip as to what I'm missing.Which IC provides
drive
> for the drum ic.I know these units are famous for hardened black grease on
> the main gear mech,which I cleaned & all plastic worms & cam gears look
> good.Customer ok'ed a hi estimate on this 4 head hi-fi unit so would like
to
> get a fix....TIA....Don.......
> >
> > HARTS-TVCR''ASC''
> > 9-Robert St.,Oromocto,NewBrunswick,CAN
> > Tel#506-357-9785Fax#506-357-6010
> >
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