"Brad" wrote in message
...
hi
i have the same problem, with mine, is their any way to fix this i don't
know much about it but im sure if you gave me some instructions i would be
able to play and fix it.
This is how the write-up will appear on repair file when i next
ftp to URL below
Panasonic SA CH 74,compact hi-fi 1996
Broken mic plug stuck in socket,jammed CD mechanism
Mark orientation of all removable ribbon cables before
separating - foil type push and pull,wire type raise the surround
before pulling on the cable. Pull front panel away from main body,
2 indirect connectors under the vol control.
To get to mic socket ,remove 2 knobs ,remove display
pannel then multi-switch pannel. Desolder socket ,drill small hole
on underside and push remnant of plug back.
This one has 5 separate platters to hold each CD.
On entry the CD sldes along the bottom ,is elevated by the laser + spinner
assembly and 4 flimsy 'ratchet' pawls hold the carrier in the elevated
position and the main slide mchanism returns the carrier to the top of the
stack of 5 after playing or along bottom to release/change through front.
As a fall-back ,disabling the
pawls and associated high level slideway the carrier will move in and out at
low level for single CD operation without jams.
Unfortunately a flimsey microswitch monitors carrier across the top and i
won't know what effect non-switching of this micro will have until i
rerassemble it all.
Marvellous array of mechanisms all coming off the one motor drive .
What sort of mind designs these mechanisms, rotary,rack and
pinion, latches, compound slideways,translating and reciprocating motions?
[ for anyone involved with this sort of thing or automata then
this book may be interesting
Ingenious Mechanisms for Designers and Inventors
Volume I: Franklin D. Jones; 1930, 536 pp, illustrated, ISBN 0-8311-1029-5 ]
Retrieved a displaced torsion spring from
elesewhere in the casing. This biased a latch (at the rear) that engaged /
disengaged at
the point where CD carrier sliding along base changes to vertical movement
of
the laser + spinner and carrier.
It looks as though a physically large but not strong torsion spring ,now
missing, used to be at the
centre of a long lever and quadrant cog that drives a lead screw to push a
lifter of all the stacked CDs.
Could not make sense of this spring, as to function properly ,seems to be
the
reverse action to what the anchor hooks would suggest.
Finally under the front edge of the CD carrier slideway is a little passive
latch that holds/releases
the bottom-most carrier relative to the slideway. Fingernails pushed behind
this
cover and forced up and out will release it.
This latch ,not obviously as
covered,was out of alignment because the central plastic pin was broken-
replaced with glued in nylon bolt after drilling a hole . Broken pedastal
type of microswitch monitoring slideway limits.
For these 2 uswitches with CD drawer out both are s/c,
in between sw1 s/c and sw2 o/c. Drawer in both o/c.
2 uswitches monitoring laser carrier movement in play
sw2 &sw3 s/c ,in between sw3 o/c,sw2 s/c
at bottom position sw2 & sw3 o/c.
Top slideway microswitch n/o
Drawer motor 3 to 4 V for external powering or
remove rubber band and turn large cogs by finger.
On reassembly intermittently powered down showing
error F61 or FG1 ,probably dodgy ribbon connections as
remade all and ok after that.
e-mail (removing .....)
electronic hints and repair briefs , schematics/manuals list on
http://homepages.tcp.co.uk/~diverse/repair.htm
Nigel,Diverse Devices,Southampton,England