Akai X-355 - HEAD DEMAGNETIZATION; TRANSISTOR PROTECTION; VENTILATION

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22. HEAD DEMAGNETIZATION
OPERATING INSTRUCTlUN;j
Normally , in ail tape re corde rs, the head s will become s lightly magnetiz-
ed. A s li ghtly m ag ne ti zed h ead will partial! y erase a recordee! t ape with
high fr e qu encies s uff c rin g th e gr ea test !osses. Severe magnetization will
re
ult if ma gn eti ze d tools a re used in th e vi c inity of th e head s. Th t>
X- 355 ha s a bui lt in he ad d emagne tizing circuit ; h owever, perioclic de-
magn e ti za tion with a demagn e ti zer is still rec ommend ed . After r emoving
th e LOW I ~ R HEAD COVER @, the he atls ca n be cl em ag neti ze d by
tou c hing the h ea ds li ghtly wi th the dem agne ti zer nnd ma king small
c- ir cul ar motion s O"er the en tir e h ea d s urf ace and he a 1 hous ing .
23. TRANSISTOR PROTECTION
Th e S. E. P. P. O. T . L. sys t<' m is u se d to pr ·otect the ou t put cirn ri tr y of the X- 355 ma in a mpli fi ers. The minimum output imp t" da nce sho uld
be 8 ohm<.. If a >P ·; rk ~r of le s' tha n B o hm ; i rnped:tnte is u ~ <:d or if the > peake r t er min ais are acc ide nta i! y s hort ed, the prot t'C tor fu se will bio" ·
to
prot ect the tran si. tor s. Tr ansistOr> art• r·asil~ · da111 agc d by excessive loacl or high a rllbient te mper a tur es. If the prot er tor fu se ha s bl own,
the so und nw · be di. tort ed or th t::re ma y be no s ound at a i l. Th e prott · nor fu se may be re pla ce cl with a n y s uiwhlc c- onllnercia l 1:\ fu >e .
24. VENTILATION
Th e V(" lltila ti on ystem of th e X- 355 is desig ne e! tO pre vent i nt e rnai a('c umul a tion of excess h ea r th ar wou id s hon en th e !ife of th t" <'Oll l pone rll
part . lt i r
eco mm e nd e cl rha t th e X- 355 b - pl ace e! o tha t air ma y c ir cu la te freely a round it.