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T_A_B_L_E_ _O_F_ _C_O_N_T_E_N_T_S_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _P_A_G_E_

1. CONTROL PANEL ......................................... 1

2. OPERATING PROCEDURES .................................. 5
2.1 Loading the Tape ................................. 5
2.1.1 Loading the Reel .......................... 5
2.1.2 Start Procedure ........................... 6
2.2 Unloading the Tape ............................... 7
2.2.1 Stop Procedure ............................ 7
2.2.2 Unloading the Reel ........................ 8

3. SUPPLEMENTARY NOTES ................................... 9
3.1 Maintenance ...................................... 9
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1_._ _ _ _ _ _ _ _ _C_O_N_T_R_O_L_ _P_A_N_E_L_ 1.

Figure 1: Control Panel.

1) POWER - when pressed to light,
push-button/indicator power is applied to the
tape unit.

2) LOAD - when pressed to light, a
push-button/indicator load sequence is ini-
tiated.

Pressing and releasing
the LOAD push-button for
the first time after
mounting a reel of tape,
causes the tape to be
tensioned.

Pressing and releasing it
a second time, causes the\f

tape to advance to the
BOT mark and stop. (BOT =
b_eginning o_f t_ape; EOT =
e_nd o_f tape).

3) ON LINE - when pressed to light,
push-button/indicator the tape unit is in the
on-line mode. This
control can only be used
after having performed a
load, or rewind,
sequence.

Pressing and releasing it
a second time will cause
the unit to go off-line.
The off-line mode can
also be caused by a
system command, or by
lack of tape tension.

4) REWIND - when pressed to light,
push-button/ indicator the tape will rewind at
maximum speed. This con-
trol can only be used in
the off-line mode.

On reaching the BOT mark,
the rewind drive ceases
and the load sequence is
automatically entered.
The REWIND indicator
remains lit also during
the subsequent load
sequence.

5) WRT EN (W_r_it_e E_n_able) - this indicator is illumi-
indicator nated, when mounting a
reel of tape with a write
enable ring. \f

If no write enble ring is
mounted, the tape unit
can only read from the
tape.

6) HI DEN (H_i_gh D_e_n_sity) - when pressed to ligth,
push-button/indicator the high density record-
ing method is selected.
The selecting of density
by this control depends
on the optional features
installed:

RC3610S: The control is not ope-
rable; indicator always
lit (PE/1600 bpi).

RC3615S: Indicator lit, selects
high density (PE/1600
bpi), if feature is in-
stalled.

Indicator not lit, se-
lects low density
(NRZI/800 bpi), if
feature is installed.

RC3620S: The control is not ope-
rable; indicator never
lit (NRZI/800 bpi).

7) FORWARD - when pressed to ligth,
push-button/indicator the tape will be moved
forward at normal opera-
ting speed. This control
can only be used in the
off-line mode.
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Pressed and releasing it
a second time will cause
the tape to stop.

8) REVERSE - moves the tape in the
push-button/indicator reverse direction, other-
wise functioning as the
FORWARD control.
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2_._ _ _ _ _ _ _ _ _O_P_E_R_A_T_I_N_G_ _P_R_O_C_E_D_U_R_E_S_ 2.

The operating points are shown in fig. 2. The tape unit is de-
signed for a maximum reel diameter of 10.5 inches (corresponding
to 2400 feet of tape).

The supply reel, i.e. the reel of tape to be read or written,
always is the lower reel. Note that the presence of a write
enable ring is required to close the interlocks which allow
writing (otherwise reading is possible only).

2_._1_ _ _ _ _ _ _ _L_o_a_d_i_n_g_ _t_h_e_ _T_a_p_e_ 2.1

2_._1_._1_ _ _ _ _ _L_o_a_d_i_n_g_ _t_h_e_ _R_e_e_l_ 2.1.1

The tape is loaded as the supply reel (lower reel). The tape must
unwind from the supply reel when the reel is turned in a
clockwise direction. To load the tape reel, position the reel
over the quick-release hub and press the center plunger. This
allows the reel to slip over the rubber ring on the hub. Press
the reel evenly and firmly against the back flange of the hub,
still with the center plunger pressed inwards. Release the center
plunger. The reel is now properly aligned in the tape path and
ready for tape threading. Then rotate the supply reel to give
about 1.5 meters of free tape.

Thread the tape along the path shown in fig. 2. It will be neces-
sary to rotate the supply reel and hold the flux gate unit away
from the head during tape threading.

Wrap the tape leader onto the take-up reel so that the tape will
be wound onto the reel when it is rotated clockwise. Wind several
turns onto the take-up reel, then turn the supply reel counter-
clockwise until slack tape has been taken up.
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Figure 2: Operating points; tape threading path.

2_._1_._2_ _ _ _ _ _S_t_a_r_t_ _P_r_o_c_e_d_u_r_e_ 2.1.2

After the tape has been manually tensioned and checked for
correct seating in the guides, bring the tape to the load point
as follows.

1. Switch on power by pressing the POWER push-button. If
desirable, power can automatically be switched on/off as the
system is switched on/off, when after the initial power-on
sequence the POWER push-button is left untuched.

2. Press and release the LOAD push-button. This applies power to
the capstan and reel motors and brings the tape to the
correct operating tension. The tape storage arms are now in
the operating position.
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CAUTION: Check that the tape is positioned correctly on all
guides or tape damage may result.

3. Press and release the LOAD push-button a second time. This
causes the tape to move forward. When the reflective BOT mark
reaches BOT/EOT tab sensor, the tape is at load point and
stops. Check the tape tracking in the guides again and close
the dust cover.

CAUTION: The dust cover should remain closed at all times
when a tape is on the take-up reel. Data reliability
may be impaired by dust and other particles in the
air if the cover is left open.

4. Select the correct recording density, using the HI DEN
push-button (if applicable).

5. Depress the ON LINE push-button. When the indicator lights,
the tape unit is ready to receive system commands.

2_._2_ _ _ _ _ _ _ _U_n_l_o_a_d_i_n_g_ _t_h_e_ _T_a_p_e_ 2.2

2_._2_._1_ _ _ _ _ _S_t_o_p_ _P_r_o_c_e_d_u_r_e_ 2.2.1

1. Ensure that the tape unit is in the off-line mode, i.e. the
ON LINE indicator is not lit. If necessary, press and release
the ON LINE push-button in order to establish the off-line
mode.

CAUTION: Only switch the tape unit off-line, while the tape
is at rest.

2. Press and release the REWIND push-button. When the tape has
rewound to the BOT mark, it comes to a controlled stop. The
tape overshoots and the transport enters the load sequence to
bring the tape to rest at the BOT mark.
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3. Press and release the REWIND control a second time. This
initiates a further rewind action which continues until
tension is lost.

2_._2_._2_ _ _ _ _ _U_n_l_o_a_d_i_n_g_ _t_h_e_ _R_e_e_l_ 2.2.2

After having performed the stop procedure, the reel is unloaded
by,

- opening dust cover,
- manually rewinding end of tape onto the supply reel,
- pressing the hub center plunger and remowing the reel.

Always keep the dust cover closed, when not operating the tape
unit.

Switch off POWER (aslo cf. 2.1.2 step 1).
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3_._ _ _ _ _ _ _ _ _S_U_P_P_L_E_M_E_N_T_A_R_Y_ _N_O_T_E_S_ 3.

3_._1_ _ _ _ _ _ _ _M_a_i_n_t_e_n_a_n_c_e_ 3.1

E_a_c_h_ _d_a_y_ _(_e_a_c_h_ _8_ _h_o_u_r_s_ _o_f_ _o_p_e_r_a_t_i_o_n_)_

Clean the read-write-heads, the guides, and the capstan using a
swab stick, or lint free cloth, damped with isopropyl alcohol.

Do not use too much fluid; the excessive fluid may easily
penetrate the bearings and damage these.

Observe: Other detergents such as methylated spirit can damage
the read-write-heads and the capstan.
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