Scully 280 Series - Page 17

TAPE TRANSPORT
CAUTION
00.- p ce5.S the ST AR T !>uUoo, 1",,,..,-
diately after the STO P b.uton I. actu-
ated "'hen tape has been drh'en at high
.peed. Let the t>.pC motion Or tile
plnchlng action 01 tile preuure r Oller
will cause tape brcakao;e.
NOT E
The a l xw e d()('s not apply to the M odel
260 (or 260/SP- 14 ) wllh Motion Sens-
[iii·
Po""",, read",s the torque motors t hrough con-
t ac t" KI03 (2 1, 22) lor Ihe aupply motor 8103,
and K 103 (U , 19) ror the t ueup mot or BIOI.
The ae ,"Olt",e .,ilI be e i ther 10 vae {high} or
vat (low) depending on the poIIllion of the ' ... ·0
\en.slon
"",I t ches S1D'9, SilO. Brake
LI04 (supply) and (t ue-up) are energIzed
by K IOO (9, 1 0).
Record
The Record ,witch Sl060n the tape trans_
p<>rt cQfltrol panel energizes the record relay
K602, which l)ermlt, bias and erase currenl to
be fed to their respective magnetic heads. The
re cord lights 00]02 and DS60] are lit when K602
is e nergIzed.
Record and playback enuallzation ls
",Ith tape speed and OOlh are controlled
ty the capslan sP«'<l ... ·Itch S1I4. ThiS ..... ilCh
xli"ates the equalizer relay K601 in the ampLi-
fier and provIdes lor hl&h - s peed equalizalion.
Lo"'-specl equallutlon normaLly i. prO,· ide<! by
L..., relay .,hen de-energized.
280AC
CAPSTA",
M OTOR
r----,
I r-- , I
(
),
J
SII· HIGH
9102
E1 h
sr AAT L-
I SHEOI EQUALIZER
"
'("'" !: c. .- ' ""
"" KIQ5 11:103
UP E [OIT START ' _ A_ST rwo
LI ... E nOI 70 I '3 20 u ' 21 2Q 2. 2tLu. 21
SW AUTO • .1 ---;lr
5·101 TR so "[ .
: SI09 tl 22 22
I ILf!TI S'Z E :" "TCHES 5110
MIOI SUPPLY
-or\.
"y
I
-- J BI03
"
I Y b-- Y IG H rl
TAXEUP
19 d:
MOTOII
l'L".f-" " '- ____ 17 & 11 ","Ti l Q
i\j "
EOIT s r ART rAST EW IND
KIQS 11: 10 1 rwo 11:101 8tOI
It 102
II NOTE 90 YOlT UP ON '201 USEO fOIl HIGHER TAPE SPEEOS A ... D III INCH TAPE
CIRCUIT
SHOWN YIlTH POW [R OH
Fig'Ure 4-2. M odel 280 AC :::[rcuils - SimpUfled