Radio Shack TRS-80 User manual

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jTRS-80
CCR-82
Computer Cassette Recorder
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Operation Manual
Catalog Number 26-1209
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Contents
Controls and Connections 1
Features ,2
Preparation for Use 3
Power Source .3
Inserting the Cassette 4
Connecting to the Computer 4
Operation with the Computer 5
Loading aProgram or Data File from Tape 5
Locating aProgram or Data on the Tape 5
Saving aProgram or Data File on the Tape 6
Other Uses for the Recorder 8
To Play Back g
To Record 9
To Erase Tape ... . 9
Accidental Erasure Prevention 10
Maintenance 11
Specifications —12
Schematic Diagram 13

Controls and Connections
®®©
(A) Tap* output p4uq (lo iARphone Jack)
iS'Tbpd input plug (to AUXiMary Input Jack)
iS'Tape control plug (to BEWot* Jackf
!§) Computer cowette plug
(:o TAPE. C*SS. Or CASSETTE dIN pli/g)
©Tapft counttr
©Ca»s«tte Compartment
©DC 6V Jack
©EARphonw Jack
©AUXiliorv Jack
©REMote/WICrophonu Jacks
©RECORD/LOW BATTERY Indicator
©STOP/EJECT Koy
©REWIWD/REVIEW Key
u2i BtCORD.'CSAV EKwy
H^PLAV/CLOAD Key
©FAST-Forward/CUE K*y
(^VOLUME Control
QMONITOR Switch
Q} PAUSE Switch
QjrDATA Indicator
-1-

Features
Computer Controlled: Allows the Computer to start or stop the tape
to load or save programs and data,
CUE/REVIEW Functions: Enable instant fast-forward or rewind while
in either save/record or load/play mode, independent of the Computer.
These functions allow you to quickly locate any desired portion of the
tape,
MONITOR Switch: Enables monitoring of the sound while saving
programs and data.
DATA Indicator: Illuminates to show that programs and data are being
loaded to the Computer. Also used with CUE/REVIEW to locate data
and/or programs on the tape.
VOLUME Control with Preset Marker: Set to the marker position for
program and data loading.
Automatic Shut-Off Mechanism: Automatically shuts off the recorder
when the end of the tape is reached while in the play/load or record/save
mode. This saves wear and strain on the unit, the tape, and the batteries.
Built-in A.L.C. (Automatic Level Control) Circuit: Enables you to
automatically obtain perfect recording levels for both recording music
and saving programs/data »no need to adjust the volume.
Tape Counter: Helps you to quickly find aspecific section of the tape.
Switchablc PAUSE: Permits you to stop the tape instantaneously, either
in record/save or pi ay/load mode -or you can switch off the remote
function of the computer to allow for manual control of the tape move-
ment.
Convenient 3-Way Power: Can be powered by the internal batteries, by
an AC power source via AC adapter, or by acar battery via DC car
adapter.
RECORD/LOW BATTERY Indicator: Serves two functions. During
recording/saving, the LED will light to show the presence of arecording
signal. In any oiher function, it will give you an indication of the battery
condition -the LED lights up when the batteries need to be replaced.
You may note that the LOW BATTERY Indicator flashes briefly as you
switch function keys. This is normal and does not mean the batteries are
weak. If the LED stays on, the batteries need to be replaced. The LOW
BATTERY Indicator is designed so that the LED lights up any time the
voltage drops below the required level. Don't let the batteries get so
weak that they cannot light the LED,
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Preparation for Use
Power Source
•Installing Batteries: Your recorder requires four (4) AA size 1-1/2 volt
batteries. (We recommend Radio Shack Enercell batteries, catalog, number
23-582 or 23-552), Ti> load batteries, turn the recorder over and open the
battery compartment cover. Insert batteries as indicated within the
compartment; then close the cover,
ZZ ZZ ZZ ZZ ZZZ WARNING: Weak batteries, even
~^^_ "~" ~~" """ ^~ "leak-proof* types, may swell and
————MM —leak. To avoid damage to the
%•recorder, remove batteries when
they are weak or if you are going
to store the recorder for an ex-
tended period of time.
•DC 6V Jack: When you want to use the unit with standard AC power
(and save the battery power), use the AC adapter (Radio Shack Catalog
Number 273-1454 )[for 240V AC, use 14-9854 (UK) or 14-9521 (Aus-
tralia)] ,Connect it to the DC 6V jack on the unit and plug the adapter
into an AC outlet.
•Car Battery: If your vehicle has 'a 12-volt, negative ground electrical
system, you can provide power to your recorder from your car battery.
Use our DC «iuto adapter (14-844D), Set the switch on the adapter to
the 6V position and connect it to the DC 6V jack. When the adapter is
connected, the internal batteries are automatically disconnected.
CAUTION: If you use an adapter other than Radio Shack's recommended
type, you must be sure that the voltage is correct (6V DC only) and that the
center terminal of the connector is negative. Failure to observe these two
vital points may result in damage to your recorder and/or adapter.
-3 -

Inserting the Cassette
Before inserting or removing the cassette, be sure to press the STOP/EJECT
key to cancel any functions that may have been previously selected. Open
the cassette lid by pressing the STOP/EJECT key again. Hold the cassette
with the open side toward you and insert it into the opening so that the full
reel is on your left; then close the lid.
After you've completed recording
or playing on one side of the
cassette, open the lid, turn the
cassette over and re-insert it. You
are now ready to record or play
the second side.
,;,.
Connecting to the Computer
CAUTION: Some Computers require their own connection cables. Refer
to your Computer and/or cassette interface owner's manual.
Use the cable to connect to the Computer.
1. Connect to the EARphone jack on the cassette unit via the black tape
output plug.
2. Connect to the AUXiliary* jack on the cassette unit via the gray tape
input plug,
3. Connect to the REMote jack on the cassette unit via the gray tape
control plug.
4. Connect to the Cassette Tape output on the Computer via the Computer
cassette plug.
*Some of the Computers, especially the Pocket Computers, need to be
connected to the MIC jack, not the AUX jack. (Refer to your Computer
and/or cassette interface owner's manual.)
Note: Some connecting cables have plugs that are too long to fit into the
jacks on the CCR-82. When using aconnection cable other than the one
supplied with your CCR-82, insert the plug until you feel aslight "catch".
Do not force the plug all the way in.

Operation with the Computer
Loading aProgram or Data File from Tape
1. Set the VOLUME control to the Pmarker. If you have trouble in
loading, adjust the VOLUME setting. When you have found the VOLUME
setting that works best with your Computer, you may want to mark that
position as your preset marker on the VOLUME knob,
2. Be sure the tape is positioned to the point just before the beginning of
recorded programs or data. Usually this means the tape should be
rewound all the way (or positioned using the tape counter). The CUE/
REVIEW functions are quite handy for this purpose.
3. If your Computer has aremote control function, set the PAUSE switch
on the CCR-82 to the OUT position. If it does not have aremote control
function, set the PAUSE switch to IN before the Computer is ready to
load the program or input the data,
4. Press PLAY on the cassette unit. Then type CLOAD .md piv^ (ENTER)
(or the equivalent command on your Computer), If you set the PAUSE
switch to IN in the preceding step, now set it to OUT before pressing
(ENTER) ,The tape will begin moving arid programs or data will be trans-
ferred lo the Computer, While the CCR-82 is sending data to the Com-
puter, the DATA LED will blink.
5. When aComputer remote control function has completed the tape opera-
tion. it will stop automatically. For aComputer without aremote con-
trol function, watch the DATA LED; when the LED goes off. it means
the end of ihe program/data has been reached. Pres-s STOP.
CAUTION: Be careful not to leave the RECORD and/or PLAY buttons
engaged for long periods of time. Failure to observe this warning could
cause aflat spot on the drive wheel, resulting in sound distortion.
Locating aProgram or Data on the Tape
The CCR-82 allows fast-forward,'rewind functions, which can operate apart
from the remote control of the Computer. That is, you can do fast-forward
or rewind, even with the Computer connected to the REMotc jack, With
the PLAY key pressed down, press and hold FAST-F/CUE or REWIND/
REVIEW. Watch the DATA LED or listen to the recorded sound to help
you locate the beginning or end of the program or data on the tape. Release
the key, and the CCR-82 is again under the control of the Computer. If you
do not press the PLAY key, the FAST-F/CUE or REWIND/REVIEW key
will lock down and the sound is automatically muted.
-5-

Saving aProgram or Data File on the Tape
1. Insert ablank (new or bulk-erased) tape, and rewind it to the beginning of
the Line. It" you use atape with aleader, be sure to advance it past the
leader to the beginning of the recording tape,
2. If your Computer has aremote control function, set the PAUSE switch
on the CCR-82 to the OUT position, (If it does not have aremote
control function, set the PAUSE switch to IN before the Computer is
ready to save the program or the data.)
3. Press RECORD on the cassette unit, (When RECORD is pressed, the
PLAY butcon automatically goes down.) Then type CSAVE and press
(RENTER) (or the equivalent command on your Computer). If you set
the PAUSEswitch to IN in the preceding step, now set it to OUT before
pressing (ENTER) .The tape will begin moving and programs or data
will be saved onto the CCR-82. While the CCR-82 is receiving data, the
RECORD LED will blink. There is no need to adjust the VOLUME set-
ting; the CCR-82 does that automatically during the save operation.
4. When the save operation is complete, aComputer with the remote con-
trol function will stop the tape automatically. If your Computer does
not have the remote control function, press STOP at the end of the save
operation.
Notes:
1. When you are saving data on acassette tape with aComputer that does
not have aremote control function, we recommend that you write apro-
gram such that the end of data transfer is shown on the display. Then
you can manually stop the CCR-82 without much loss of the tape.
2, It is possible to record two or more programs or data files on one side of
atape. However, this takes alittle extra care and attention on your part.
First, rewind the tape and reset the tape counter. Then keep awritten
record of the counter reading where each program or data file starts.
When you are ready to load in aparticular program or data file, rewind
the tape, reset the counter, and then use FAST-FORWARD/REWIND to
position the tape just ahead of the desired tope section. Remember, fast-
forward,'rewind can be done manually without disconnecting the REMote
jack.
-6-

We've already noted the special features of your CCR-82; here are some
suggestions to get most from your unit.
•On ordinary cassette recorders, you would have to disconnect the plug
from the earphone jack to monitor the sound from the speaker. On the
CCR-82, the MONITOR switch allows you to listen to the sound without
disconnecting the EARphone jack. Set the MONITOR switch to IN for
listening, to OUT if you do not need monitoring.
•The remote control jack on normal cassette units turns the unit on/off
remotely: you must turn the unit on first before using fast-forward/cue
or rewind/review. We have built in another leaf switch so you can fast-
forward/rewind without disconnecting the REMote jack,
»Another convenience is the PAUSE switch. Many computers have the
remote control function. Set the switch to OUT for such aComputer. If
your Computer does not have the remote control function, use the IN
and OUT positions to stop/start tape movement; these positions function
the same as the pause switch on ordinary tape recorders.
To avoid remote control by your Computer, set the PAUSE switch to
REM OFF; then you can manually play (or record) tape without discon-
necting the remote plug.
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Other Uses for the Recorder
To Play Back
1. Insert the pre-recorded cassette tape.
2. Rewind the tape by pressing the REWIND/REVIEW key.
3. Press the STOP/EJECT key when you reach the section of the tape you
wish to play
.
4. Press PLAY. Adjust the VOLUME control to acomfortable setting.
5. To stop playback, press STOP/EJECT, When the tape reaches the end,
the unit will automatically shut off the power.
6. When you want to listen privately, plug an earphone into the EARphone
jack, Or. for greater Fidelity; you can play back the sound through an
external speaker which has an impedance of 8ohms. Connect the speaker
via apatch cord plugged into the EARphone jack. (Visit your local
Radio Shack store for all accessories.)
To advance the tape rapidly, press FAST-F/CUE, When you reach the ap-
proximate point you want, press STOP/EJECT and then press PLAY.
To rewind the tape rapidly, press REWIND/REVIEW, When you reach the
approximate point you want, press STOP/L'JECT and then press PLAY.
In each case, always press STOP/EJECT before pressing PLAY. Abrupt
change in tape speed /direction can damage the tape.
When you press and hold FAST-F/CUE or REWIND/REVIEW while the
PLAY key is engaged, either in the play or record mode (the RECORD key
is released if it is in the record mode), the tape will be wound rapidly and, at
the same time, you can hear the recorded sound in ahigh-pitched tone.
This helps you to locate the end or beginning of aparticular section of the
tape. Release the FAST-F/CUE or REWIND/REVIEW, and normal play-
back is resumed.
The PAUSE switch provides aconvenient method of starting and stopping
the recorder whenever it is playing or recording. It docs not function in
fast-forward or rewind mode. To stop tape movement, set PAUSE to IN.
To continue tape movement, set the PAUSE switch to OUT.
-8-

To Record
Connect an optional microphone to the MIC jack on the unit; or connect an
external source such as aradio, etc., to the AUX jack with asuitable patch
cord with proper plugs. When both MIC and AUX jacks arc connected, only
the MIC jack is functional, Set the volume control of the external sound
source to anormal listening level.
Press the RECORD key. Now the tape starts moving and you are recording.
The recording level is automatically set by the CCR-S2;you do not have to
worry about your recording level being too high or too low. The VOLUME
control has no effect on the sound.
You can monitor the sound when you record from an auxiliary source. Set
the MONITOR switch to IN. If you are recording from the microphone, do
not set MONITOR to IN. If you do, acoustic feedback (whistling) will take
place.
If your microphone has aremote plug, connect it to the REMote jack on
the CCR-82. Use the remote switch on the microphone to temporarily stop
recording. But be sure that the PAUSE switch kset to OUT!
To Erase Tape
Each time you make arecording, any previous recording on the tape is auto-
matically erased; thus;, the tape may be used for new recording as many
times as you wish. For best results, we recommend that computer tapes be
bulk erased before reusing them. (Use our Magnetic Bulk Tape Eraser,
Radio Shack Catalog Number 44 -232.) This will assure that all traces of
previously recorded data are removed and will not interfere with the new
data.
CAUTION; The bulk tape eraser erases both sides of acassette. If you
want to erase only one side, disconnect the plugs from the MIC and/or AUX
jacks and press RECORD.
-9-

Accidental Erasure Prevention
Cassettes have abuilt-in device to automatically prevent erasure of aprevious
recording. It is asmall plastic tab at the back of the cassette. To activate
the erasc-protect feature, break off the plastic tab with ascrewdriver-
There is atab for each side; be sure you break off the correct tab, (See Fig-
ure I-A.) If you decide you want to record on that cassette after you have
broken off the tabs, put apiece of tape over the hole where you brake off
each tab, as shown in Figure 1-B.
CAUTION; If you have acassette with the tabs broken off, don't try to
force the RECORD key down. You can damage apart of the mechanism.
Figure 1-A
Figure 1-6
Figure 1. Erase Prevention Tabs
-10

Maintenance
With the cassette removed, and with the cassette lid up, press down the PLAY
key, exposing the erase and record heads and the rubber drive wheel. Clean
these points, using acotton swab moistened with denatured alcohol (not
nibbing alcohol) or with a special head cleaning fluid. (Your local Radio
Shack store has these items,) To insure good recording and playback results,
clean after the first 6hours of operation (and every 6-8 hours of operation
after that). After cleaning, be sure to press (he STOP/EJECT key, so that
these parts may return to their normal operating position for cassette hold-
ing. For easy cleaning, we recommend our Cassette Head Cleaner Tape (44-
1160),
m
11is agood idea to periodically demagnetize the tape heads, too. Use one of
our Tape Head Demagnetizes, You can clean and demagnetize in one simple
operation just by playing our Cassette Demaunetizer Tape (44-63 1),
If you use the longer, thinner tapes (C-90, C-l 20, etc.), it is absolutely vital
that you keep your recorder clean. Failure to do so will result in poor tape
handling, improper auto-slop function, and serious tape wrap-ups. Clean
the tape handling parts well and often.
CAUTION:
Do not expose the tape recorder or acassette to high temperatures or high
humidity.
Do not touch the tape heads with screwdrivers or other metal objects, or
any magnetic object.
Remove the batteries when the recorder will not be used for more than a
month, because battery leakage may damage the unit. Don't leave weak or
dead batteries in the recorder.
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Specifications
Tape System:
Tape Speed:
Wow and Flutter:
(WRMS)
Signal-to-Noise Ratio:
(Playback/Overall)
Semiconductors:
Erase System:
AGC Delay Time at Recording:
Turn On Time at Record:
Record System:
Power Requirement:
Dimensions:
Weight:
2-track monaural
4,75 cm/sec.
0.28%
50/39 dB
2ICs
5transistors
4diodes
DC erasing
0,4 sec.
0.4 sec.
AC bias
DC 4"AA" cells
Standard AC via adapter
External 12 VDC via adapter
7-3/32" x4-11/16" x1-5/16"
(H xWx D) (1 80mm x119mm x33.5mm
>
1.1 lbs(SOOg)
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Schematic Diagram
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