Cassette; Video Tape; Leader Tape And Trailer Tape; Reel - JVC HR-S10EG Service Manual

1.9 CASSETTE
1.9.1. Video Tape
Length : The relationship between tape length and
time for recording and playback can be de-
fined by the formula:
L=[1.42t+21°3
where, L : tape length (m)
t : recording or playback time
(minutes)
Note: L shall be an integer obtained after all
decimals produced in calculation are
raised. (See 'Reference Table".)
Width : 12.65 + 0.01 mm
Fluctuation : less than 6 um
Thickness: 19° ym
Coercivity —: 600 oersted class (nominal)
Optimum recording current shall not differ
from the standard tape.
{Reference Table]
Kinds of Blank Cassettes
Kind of Recording or playback | Length of
cassette time video tape
E-240 240 min.
E-180 180 min.
E-150 150 min.
E-120 120 min.
E-90 90 min.
E-60 60 min.
E-30 30 min,
1.9.2 Leader Tape and Trailer Tape
Length : In case time for recording or playback is:
over 90 minutes : 170+ 20mm
just or under
90 minutes 1150+ 20mm
Width : 12,65 + 0.03 mm
Thickness 24086 um
Material : Polyester film
Transparency : more than 50%.
Length of splicing: 12 ~ 19 mm
Gap of splicing :O0~70um
Splicing force : more than 3 kg
1.9.3 Reel
Outside diameter : 89 + 0.2mm
Hub diameter __: In case time for recording or playback is:
over 90 minutes : 26 +0.15mm
just or under
90 minutes :62£0.2mm
(If just or under 30 minutes, it can be
70 + 0.2 mm.)
E-value : more than 1.5 mm
1.9.4 Simplified Ilustrations
Coated side
Base side
£ é
3
Hole for the Hole for the sensor
Tight path Hight path
Hole for the sensor famp
OF
lO:)
Unlocking pin the Reference pane
front cover
ea
Erasure prevention tab
O
e
Reference plane
Fig. 1-19 Cassette appearance
1-11