Tandy CM-8 User manual

TANDY cai.No. 26-321
5
Color Monitor CM-8
Owner's Manual

The FCC Wants You to Know
This equipment generates and uses radio frequency energy. If not installed and used properly,
that is in strict accordance with the manufacturer's instructions, it may cause interference to
radio and television reception.
It has been type tested and found to comply with the limits for aClass Bcomputing device
in accordance with the specifications in Subpart Jof Part 15 of FCC Rules, which are designed
to provide reasonable protection against such interference in aresidential installation.
However, there is no guarantee that interference will not occur in aparticular installation.
If this equipment does cause interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is encouraged to try to correct the in-
terference by one or more of the following measures:
•Reorient the receiving antenna
•Relocate the computer with respect to the receiver
•Move the computer away from the receiver
•Plug the computer into adifferent outlet so that computer and receiver are on different
branch circuits.
Warning
This equipment has been certified to comply with the limits for aClass Bcomputing device,
pursuant to Subpart Jof Part 15 of FCC Rules. Only peripherals (computer input/ouput
devices, terminals, printers, etc.) certified to comply with the Class Blimits may be attached to
this computer. Operation with non-certified peripherals is likely to result in interference to
radio and TV reception.
2/86
Color Monitor CM-8 Owner's Manual:
Copyright 1986 Tandy Corporation
Fort Worth, Texas 76102, U.S.A.
All Rights Reserved
Reproduction or use, without express written permission from Tandy Corporation,
of any portion of this manual, is prohibited. While reasonable efforts have been
taken in the preparation of this manual to assure its accuracy, Tandy Corporation
assumes no liability resulting from any errors or omissions in this manual or from the
use of the information obtained herein.
10

TERMS AND CONDITIONS OF SALE AND LICENSE OF TANDY COMPUTER EQUIPMENT AND SOFTWARE
PURCHASED FROM RADIO SHACK COMPANY-OWNED COMPUTER CENTERS, RETAIL STORES AND
RADIO SHACK FRANCHISEES OR DEALERS AT THEIR AUTHORIZED LOCATIONS
LIMITED WARRANTY
I. CUSTOMER OBLIGATIONS
A. CUSTOMER assumes full responsibility that this computer hardware purchased (the "Equipment"), and any copies of software included
with the Equipment or licensed separately (the "Software") meets the specifications, capacity, capabilities, versatility, and other
requirements of CUSTOMER.
B. CUSTOMER assumes full responsibility for the condition and effectiveness of the operating environment in which the Equipment and
Software are to function, and for its installation.
II. LIMITED WARRANTIES AND CONDITIONS OF SALE
A. For aperiod of ninety (90) calendar days from the date of the Radio Shack sales document received upon purchase of the Equipment.
RADIO SHACK warrants to the original CUSTOMER that the Equipment and the medium upon which the Software is stored is free from
manufacturing defects. This warranty is only applicable to purchases ol Tandy Equipment by the original customer from Radio Shack
company-owned computer centers, retail stores, and Radio Shack franchisees and dealers at their authorized locations The warranty
is void if the Equipment's case or cabinet has been opened, or if the Equipment or Software has been subjected to improper or abnormal
use. If amanufacturing defect is discovered during the stated warranty period, the defective Equipment must be returned to aRadio Shack
Computer Center, aRadio Shack retail store, aparticipating Radio Shack franchisee or aparticipating Radio Shack dealer for repair, along
with acopy of the sales document or lease agreement. The original CUSTOMER'S sole and exclusive remedy in the event of adefect is
limited to the correction of the detect by repair, replacement, or refund of the purchase price, at RADIO SHACK'S election and sole
expense. RADIO SHACK has no obligation to replace or repair expendable items.
B, RADIO SHACK makes no warranty as to the design, capability, capacity, or suitability for use of the Software, except as provided in this
paragraph. Software is licensed on an "AS IS" basis, without warranty. The original CUSTOMER'S exclusive remedy, in'the event of a
Software manufacturing defect, is its repair or replacement within thirty (30) calendar days of the date of the Radio Shack sales document
received upon license of the Software. The defective Software shall be returned to aRadio Shack Computer Center, aRadio Shack retail
store, aparticipating Radio Shack franchisee or Radio Shack dealer along with the sales document,
CExcept as provided herein no employee, agent, franchisee, dealer or other person is authorized to give any warranties of any nature on
behalf of RADIO SHACK.
DEXCEPT AS PROVIDED HEREIN, RADIO SHACK MAKES NO EXPRESS WARRANTIES, AND ANY IMPLIED WARRANTY OF
MERCHANTABILITY OR FITNESS FOR APARTICULAR PURPOSE IS LIMITED IN ITS DURATION TO THE DURATION OF THE WRITTEN
LIMITED WARRANTIES SET FORTH HEREIN.
E. Some states do not allow limitations on how long an implied warranty lasts, so the above limitation^} may not apply to CUSTOMER.
III. LIMITATION OF LIABILITY
AEXCEPT AS PROVIDED HEREIN, RADIO SHACK SHALL HAVE NO LIABILITY OR RESPONSIBILITY TO CUSTOMER OR ANY OTHER
PERSON OR ENTITY WITH RESPECT TO ANY LIABILITY, LOSS OR DAMAGE CAUSED OR ALLEGED TO BE CAUSED DIRECTLY OR
INDIRECTLY BY "EQUIPMENT" OR "SOFTWARE" SOLD, LEASED, LICENSED OR FURNISHED BY RADIO SHACK, INCLUDING, BUT NOT
LIMITED TO, ANY INTERRUPTION OF SERVICE, LOSS OF BUSINESS OR ANTICIPATORY PROFITS OR CONSEQUENTIAL DAMAGES
RESULTING FROM THE USE OR OPERATION OF THE "EQUIPMENT" OR "SOFTWARE." IN NO EVENT SHALL RADIO SHACK BE LIABLE
FOR LOSS OF PROFITS, OR ANY INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF ANY BREACH OF THIS
WARRANTY OR IN ANY MANNER ARISING OUT OF OR CONNECTED WITH THE SALE, LEASE, LICENSE, USE OR ANTICIPATED USE OF
THE "EQUIPMENT" OR "SOFTWARE."
NOTWITHSTANDING THE ABOVE LIMITATIONS AND WARRANTIES, RADIO SHACK'S LIABILITY HEREUNDER FOR DAMAGES INCURRED
BY CUSTOMER OR OTHERS SHALL NOT EXCEED THE AMOUNT PAID BY CUSTOMER FOR THE PARTICULAR "EQUIPMENT" OR
"SOFTWARE" INVOLVED.
B. RADIO SHACK shall not be liable for any damages caused by delay in delivering or furnishing Equipment and/or Software.
CNo action arising out of any claimed breach of this Warranty or transactions under this Warranty may be brought more than two (2) years
after the cause of action has accrued or more than four (4) years after the date of the Radio Shack sales document for the Equipment or
Software, whichever first occurs.
D. Some states do not allow the limitation or exclusion of incidental or consequential damages, so the above limitation(s) or exclusion(s) may
not apply to CUSTOMER.
IV. SOFTWARE LICENSE
RADIO SHACK grants to CUSTOMER anon-exclusive, paid-up license to use the TANDY Software on one computer, subject to the lollowing
provisions:
A. Except as otherwise provided in this Software License, applicable copyright laws shall apply to the Software.
B. Title to the medium on which the Software is recorded (cassette and/or diskette) or stored (ROM) is transferred to CUSTOMER, but not
title to the Software.
C. CUSTOMER may use Software on amultiuser or network system only if either, the Software is expressly labeled to be for use on a
multiuser or network system, or one copy of this software is purchased for each node or terminal on which Software is to be used
simultaneously.
D. CUSTOMER shall not use, make, manufacture, or reproduce copies of Software except for use on one computer and as is specifically
provided in this Software License. Customer is expressly prohibited from disassembling the Software.
E. CUSTOMER is permitted to make additional copies of the Software only for backup or archival purposes or if additional copies are required
in the operation of one computer with the Software, but only to the extent the Software allows abackup copy to be made However, for
TRSDOS Software, CUSTOMER is permitted to make alimited number of additional copies tor CUSTOMER'S own use.
F. CUSTOMER may resell or distribute unmodified copies of the Software provided CUSTOMER has purchased one copy of the Software for
each one sold or distributed. The provisions of this Software License shall also be applicable to third parties receiving copies of the
Software from CUSTOMER.
G. All copyright notices shall be retained on all copies of the Software
V. APPLICABILITY OF WARRANTY
A. The terms and conditions of this Warranty are applicable as between RADIO SHACK and CUSTOMER to either asale of the Equipment and/
or Software License to CUSTOMER or to atransaction whereby Radio Shack sells or conveys such Equipment to a third party for lease to
CUSTOMER.
B, The limitations of liability and Warranty provisions herein shall inure to the benefit of RADIO SHACK, the author, owner and or licensor of
the Software and any manufacturer of the Equipment sold by Radio Shack.
VI. STATE LAW RIGHTS
The warranties granted herein give the original CUSTOMER specific legal rights, and the original CUSTOMER may have other rights which vary
from state to state.
8/85

Introduction
Tandy is proud to present the CM-8, acolor display monitor specially designed for
Color Computer 3.
Features of the CM-8 include:
•Thirteen-inch color display providing eye-pleasing graphics
•High contrast CRT with 0.52-mm screen pitch
•Adjustable picture controls that tailor brightness and contrast to suit environ-
mental lighting
•Sharp, "flicker-free" image provided by non-interlaced circuitry
•Built-in speaker and audio circuit
Description of the CM-8
Before connecting your CM-8 to acomputer or power source, first read the instruc-
tions provided in the section Using the CM-8. The information below will only ac-
quaint you with the parts of your monitor.
Features and Controls
W\
[£_ ^
~v1 '
Figure 1. Front View
(T) Video Screen. Front viewing surface.
(2) POWER ON Indicator. This indicator illuminates when the monitor's power is
on.

Description of the CM-8
(D POWER ON/OFF Switch. Press to turn on power to the CM-8. Press again to turn
off power.
(4) Control Panel. Behind this panel are the Vertical Hold, Horizontal Centering,
Sound Volume, Contrast, and Brightness rotary controls.
Figure 2. Rear View
(T) Power Cord. Plug the power cord into astandard, grounded AC outlet or approved
power strip.
(2) RGB Connector. Connect the RGB connector to the Color Computer 3.
Setting Up the CM-8
To set up the CM-8, you only have to connect the monitor to your Color Computer 3
via cable.
Connecting to aComputer
1. Be sure that power to all components is OFF.
2. Connect the RGB connector to the computer's RGB interface on the bottom of
the computer.
3. Route the connector cable through the groove on the bottom of the computer.
After you have connected the CM-8 to your Color Computer, connect the CM-8's AC
cord to the power source.
-3-

Using the CM-8
Power up the CM-8 (and other peripherals if necessary), then the Color Computer 3.
After powering up, you may need to adjust the display of the CM-8.
Adjusting the CM-8
The 5adjustment knobs are located below the video screen on the left side behind
the control panel. The panel door opens from the left side and swings down to reveal
the controls.
BRIGHTness
CONTRAST
-
SOUND
H-CENTER -
V-HOLD
"1
Figure 3. Control Panel
V-HOLD
This control stabilizes the display on the screen. Rotate the knob fully counter-
clockwise and then slowly clockwise until the display is stable.
SOUND
This control adjusts the sound volume. The volume increases as this knob is turned
clockwise and decreases as it is turned counterclockwise.
H-CENTER
This control sets horizontal position. Rotate the knob to center the display.
CONTRAST and BRIGHTness
Adjust the screen brightness to compensate for room lighting.
•If the room is dark, rotate either or both of these controls counterclockwise
until the picture is easily visible.
•If the room is bright, rotate either or both of these controls clockwise until the
picture is easily visible.
•The CONTRAST control also adjusts separation of low and high intensity
characters —low or high as required.

Care and Maintenance
Provided the CM-8 is connected to the proper power source and is handled gently, it
should give you along period of trouble-free service. Unplug the set and have it
checked by your qualified Radio Shack service technician, if you suspect amalfunc-
tion with the unit under conditions such as:
•Set is dropped or the cabinet is damaged
•Power cord is damaged or frayed
•Set is exposed to rain or water
If you are unable to restore normal operation by following the detailed procedure in
your operation instructions, do not attempt any further adjustments as improper
adjustment of other controls may result in damage and could require extensive work
by aqualified technician to restore the set to normal operation. Unplug the set and
call your Radio Shack Computer Center or Radio Shack store.
If the set fails, or exhibits adistinct change in performance, the unit needs servicing.
Unplug the set and have it checked by aprofessional Radio Shack service technician.
It is normal for some sets to make occasional snapping and popping sounds, par-
ticularly when being turned on or off. If the snapping or popping is continuous or
frequent, unplug the set and consult your Radio Shack Computer Center or Radio
Shack store.
Installation and Location Hints
The set has slots, openings in the cabinet and back for ventilation purposes, to pro-
vide reliable operation of the monitor and protect it from overheating.
•Install the set at least 4" (0.1 meters) away from the wall.
•Never cover the slots or openings with cloth or other fabric.
•Never block the bottom ventilation slots of the monitor by placing it on abed,
sofa, rug, etc.
•Never place the monitor in abuilt-in enclosure unless proper ventilation is
provided.
•Never place the monitor near or over aradiator or heat register.
•Never expose the monitor to rain or excessive moisture and dust as this can be
apotential cause of fire or shock hazard.
•Never place the monitor on an unstable monitor cart or stand. The monitor
may fall, causing damage to the monitor or personal injury.
-5-

Care and Maintenance
Operation
•Operate the set only from the power source indicated on the back of the cabinet.
•To use apower source that is not marked on the monitor will shorten the life of
the monitor and cause damage in addition to improper operation.
•To ensure safe operation, the 3-pin plug (supplied) must be inserted only into a
standard 3-pin power point which is effectively grounded through the normal
household wiring. Extension cords used with the equipment must be 3-wire and
correctly wired to provide connection to ground. Improperly wired extension
cords are amajor cause of fatalities. The fact that the eqirpment operates satis-
factorily does not imply that the power point is grounded and that the installation
is completely safe. For your safety, if in any doubt about the effective grounding
of the power point, consult aqualified electrician.
•Do not overload wall outlets and extension cords as this can result in afire or
electrical shock.
•Adjust only those controls that are described in the owner's manual. Improper
adjustment of other controls may result in possible damage and will require the
services of atechnician to restore proper operation.
•Do not allow anything to rest on the power cord. Do not locate this monitor
where the cord will be abused by persons walking on it.
•When not using the set for extended periods of time, such as aweekend or vaca-
tion, unplug the set from the wall outlet.
•When the same characters or graphics are shown for along time with the BRIG HT-
ness and CONTRAST controls set to maximum positions, part of the screen may
be damaged. Use these controls with care.
•Do not remove the back cover of the set as this can expose you to very high volt-
age and other hazards.
•Caution children about dropping or pushing objects into the cabinet openings.
Some internal parts carry hazardous voltages and contact can result in electrical
shock or fire.
•Never operate the set near water—for example, near abathtub, washbasin,
kitchen sink, laundry tub, swimming pool, or in awet basement, etc.
•Never spill aliquid of any kind on the monitor. If liquid is accidentally spilled,
unplug the set and have it checked by aRadio Shack service technician before
using.
Cleaning the CM-8
Always unplug the monitor before cleaning it. Wipe the screen and cabinet, front and
sides, with asoft cloth. If the screen requires more than dusting, apply ahousehold
window cleaner to asoft cloth to clean the monitor screen.
Caution—Do not use benzene, thinner, or any volatile substances to clean the unit
as the finish may be permanently marred. Never leave the unit in contact with rubber
or vinyl for an extended period.
Occasionally, the internal parts of the monitor may need to be cleaned to prevent
afire and other damage caused by dust particles. It is recommended that you take
the unit to aRadio Shack Computer Center for a yearly cleaning.
-6-

Technical Information
The CM-8 is designed for connection to anon-interlaced 225-line signal with 15.701
kHz scanning frequency (as detailed on pages 7and 8). When the CM-8 is connected
to acomputer with other than the specified input signal, the following may occur:
Symptom Cause
Shrunken screen
Expanded screen
Image to left or right
Moving screen
Dark screen
Data display period is too short.
Data display period is too long.
Data display period is out of alignment.
Synchronization period is different.
Front and back porch of video signal is missing.
Input Signal
Video Signal Horizontal Sync. Vertical Sync.
RGB Separate Analog
0.8 ~e 2.0 VTTL-Positive TTL-Positive
Timing Chart
Horizontal
Video
H-sync.
(10CHK8CHK5CH)
P_™.,5.701kHz
(unit: jus)
Vertical
Video
V-sync.
fV=59.7Hz
(unit:ms)

Technical Information
Input Connector
The connector is a10-pin, flat cable type. The relation between pins and signals is as
follows:
raarasa
[±] [aid
PIN# SIGNAL
1NO CONNECT
2GROUND
3RED
4GREEN
5BLUE
--
7AUDIO
8HORIZONTAL SYNC
9VERTICAL SYNC
10 NO CONNECT
Specifications
Power Supply
AC Input Current
CRT
Input Signal
Input Level
Input Connector
Speaker
Scanning Frequency
Horizontal
Vertical
Display Size
Cabinet Dimensions
Weight
Power Cord
U.S.A.: 120VAC, 60Hz
Australia: 240VAC, 50Hz
U.S.A.: 0.75A
Australia: 0.35A
13" (33 cm) diagonal, 90° deflection, high contrast,
picture tube, 0.52-mm screen pitch
Red, green, and blue (RGB) video, analog, vertical and
horizontal synchronization, audio signal
Video 0.8 ~2.0V-positive, vertical and horizontal
synchronization, TTL-positive, audio 1.0V p-p
10-pin, flat cable type connector
3-1/8" (8.0 cm) round (8 ohms)
15.701 kHz±500Hz
59.7Hz±1.0Hz
9-27/32" x7-15/32" (250 mm x190 mm)
13-11/16"(W)x 12-17/32"(H) x15-1/8"(D)
(348 mm(W) x318 mm(H) x384.5 mm(D))
Approximately 23 lbs. 2ozs. (10.5 kg)
3-wire, approximately 6ft. (1.83 m)
-8-

SERVICE POLICY
Radio Shack's nationwide network of service facilities provides quick, conveni-
ent, and reliable repair services for all TANDY/Radio Shack computer products,
in most instances. Warranty service will be performed in accordance with Radio
Shack's Limited Warranty. Non-warranty service will be provided at reasonable
parts and labor costs.
Because of the sensitivity of computer products, and the problems which can
result from improper servicing, the following limitations also apply to the ser-
vices offered by Radio Shack:
1
.
If any of the warranty seals on any Radio Shack and Tandy computer prod-
ucts it sells are broken, Radio Shack reserves the right to refuse to service
the product or to void any remaining warranty on the product.
2. If any computer product purchased from Radio Shack has been modified so
that it is not within manufacturer's specifications, including, but not limited to,
the installation of any non-Radio Shack parts, components, or replacement
boards, then Radio Shack reserves the right to refuse to service the product,
void any remaining warranty, remove and replace any non-Radio Shack part
found in the product, and perform whatever modifications are necessary to
return the product to original factory manufacturer's specifications.
3. The cost for the labor and parts required to return the computer product to
original manufacturer's specifications will be charged to the customer in ad-
dition to the normal repair charge.

CUSTOM MANUFACTURED FOR RADIO SHACK
ADivision of Tandy Corporation
U.S.A.: FORT WORTH, TEXAS 76102
CANADA: BARRIE, ONTARIO L4M 4W5
AUSTRALIA
91 Kurrajong Avenue
Mount Druitt, N.S.W. 2770
—TANDY CORPORATION -
BELGIUM FRANCE
Rue des Pieds d'Alouette, 39
5140 Naninne (Namur)
Centre Commercial des 3Fontaines
B.P. 147
95022 Cergy Pontoise Cedex
U. K.
Bilston Road Wednesbury
West Midlands WS10 7JN
7A6 Printed in Japan
TINS-3198CEZZ