Radio Shack TRC-237 User's Manual
Contents
1. oF VOLUME SQUELCH 19 J As 21 1650 fm Page 20 Thursday August 5 1999 11 43 AM Note Do not turn SQUELCH too far clockwise because you might also cut out weak signals 7 To turn off the TRC 237 turn OFF VOLUME toward OFF until it clicks TRANSMITTING 1 Follow Steps 1 6 in Receiving Transmissions and Adjusting Squelch on Page 18 2 Hold the TRC 237 2 to 3 inches from your mouth Press and hold PUSH TO TALK on the side of the TRC 237 TX on the front of the TRC 237 lights Speak into the microphone MOD lights When you finish speaking release the button TX and MOD turn off Note Do not speak too loudly when transmitting It does not make your signal any stronger and might distort your transmission Important Channel 9 is reserved for motorist assistance and for reporting emergency information about acci dents hazardous road conditions and so on If you are using Channel 9 always give emergency messages priority 3 To turn off the TRC 237 turn OFF VOLUME toward OFF until it clicks 20 RW J As 21 1650 fm Page 21 Thursday August 5 1999 11 43 AM CB OPERATION TIPS The following tips will help you get the most enjoyment from your TRC 237 COMMON USES FOR A CB RADIO Business Uses e Truck drivers and delivery personnel can learn road and traffic conditions and get assistance in locating desti nations A walkie talkie is2. 10 1 Cannot understand your mes sage 10 2 Your signal is good 10 3 Stop transmitting 10 4 Message received and under stood 10 5 Relay information to 10 6 I am busy 10 7 Out of service 10 8 In service 10 9 Repeat last message 10 10 Negative No 10 11 in service 10 12 Stand by 10 13 Report conditions 10 14 Information 22 o p 498 Ge S 21 1650 fm Page 23 Thursday August 5 1999 11 43 Code Meaning 10 15 Message delivered 10 16 Reply to message 10 17 En route 10 18 Urgent 10 19 Contact 10 20 My location is 10 21 Call by telephone 10 22 Cancel last message 10 23 Arrived at the scene 10 24 Assignment complete 10 26 Estimated time of arrival is i 10 30 Use caution 10 31 Pick up 10 33 Emergency traffic Clear the channel 10 34 The time is Note Although this table lists the 10 codes meanings in the form of a state ment they can also be phrased as ques tions 10 6 Are you busy 10 20 What is your location 23 o p e Ge S 21 1650 fm Page 24 Thursday August 5 1999 11 43 CB COURTESY e Wait for a pause in someone else s transmission before you ask for a break e If you do not receive an answer to your call after a second attempt sign off and wa
3. USING BATTERIES You can power the TRC 237 from eight AA alkaline batteries such as Ra dioShack Cat No 23 552 with the two supplied dummy batteries or 10 re chargeable AA nickel cadmium batteries such as Cat No 23 125 7 d S 21 1650 fm Page 8 Thursday August 5 1999 11 43 AM S Cautions e Always use fresh or freshly charged batteries of the required size and recommended type e Do not mix old and new batteries different types of batteries stan dard alkaline or rechargeable nickel cadmium or rechargeable batteries of different capacities Follow these steps to install the batteries 1 If the TRC 237 is on turn OFF VOLUME fully counterclockwise until it clicks to turn it off a VOLUME SQUELCH 2 Slide the strap on the back of the TRC 237 through the buckle and the battery compartment cover to re move it GB ooooooocooooo0oo0o0 AF ao oooooooooo0oo0oo0o0 oQ 20 3 Slide the battery compartment cover in the direction of the arrows to remove it Ra w k EEE EEES EA o p pe P AWS 21 1650 fm Page 9 Thursday August 5 1999 11 43 AM 4 Be sure ALKALINE NI CD inside the battery compartment is set to ALKA LINE 5 Put eight AA alkaline batteries and the two supplied dummy batteries or ten AA nickel cadmium batteries into the battery compartment as indi cated b
4. batteries After removing the batteries from the TRC 237 follow the instructions that come with the external charger Important Your TRC 237 is capable of using nickel cadmium batteries At the end of the batteries useful life they must be re cycled or disposed of properly Contact your local county or state hazardous waste management authorities for informa tion on recycling or disposal programs in your area Some options that might be available are municipal curbside collec tion drop off boxes at retailers such as your local RadioShack store recycling col lection centers and mail back programs USING VEHICLE BATTERY POWER You can power your TRC 237 from your vehicle s cigarette lighter socket with an optional 12 volt DC fused power cord such as Cat No 270 1533 Cautions e You must use a DC fused cord that supplies 12 volts and delivers at least 1200 milliamps of vehicle power lts center tip must be set to positive and its plug must correctly fit the TRC 237 s POWER jack The recommended fused cord meets these specifications Using a fused cord that does not meet these speci fications could damage the TRC 237 or the fused cord 12 RW P AS 21 1650 fm Page 13 Thursday August 5 1999 11 43 AM e When you finish using the TRC 237 unplug the fused cord from the ciga rette lighter socket before you dis connect it from your TRC 237 1 If the TRC 237 is on turn OFF VOL UME ful
5. also good company on those long hauls e On construction crews a walkie talkie quickly pays for itself when you are calling for additional materials or coordinating the activities of differ ent work crews e For security officers a walkie talkie is more than a convenience it is a must for both safety and efficiency Personal Uses e Keep in touch with home while driv ing to work to the store or to a social activity Let your family know you are tied up in traffic or that you will stop by the store on the way home e If you are a two car or more family walkie talkies are great for communi cating with family members while they are in their cars e Contact friends or neighbors find out what s happening or plan a get together Ever have car trouble or run out of gas on the highway What an assur ance it is to be able to radio for assis tance 21 RW Ge S 21 1650 fm Page 22 Thursday August 5 1999 11 43 Camping fishing and other sports are more fun with a walkie talkie Locate a friend or find out what s cooking back at camp USING COMMON 10 CODES Citizen s band operators have largely adopted the 10 codes for standard ques tions and answers Their use permits fast er communication and better intelligibility in noisy areas This table lists the codes adopted by the Associated Public Safety Communica tions Officers APCO Code Meaning
6. Ge S 21 1650 fm Page 1 Thursday August 5 1999 11 43 AM S OWNER S MANUAL Cat No 21 1650 TRC 237 40 Channel 5 Watt CB Walkie Talkie with Channel 9 19 Priority Switch e R o O 020 g o 09 225 Oro Lay o O ot 0 Qat One N 220 VQ 2 A 5 Q Xo XQ vo 5 5 o Please read before using this equipment RadioShack AW H 4 J As 21 1650 fm Page 2 Thursday August 5 1999 11 43 AM FEATURES Your RadioShack TRC 237 40 Channel 5 Watt CB Walkie Talkie with Channel 9 19 Priority Switch is a portable two way radio you can carry almost anywhere The chan nel priority switch lets you quickly switch to either Channel 9 to report emergency situ ations or to Channel 19 to transmit and re ceive information about road and traffic conditions You can use your TRC 237 around the house in your office or in your car or boat You can also use it on fishing trips or at your business for supervisory security or warehouse personnel Your TRC 237 also has the following fea tures Transmit Power High Low Switch lets you reduce the transceivers power output during short range transmissions to save battery power Transmit Indicator lights whenever you press the transmit button Modulation Indicator lights when you speak into the microphone The indicator brightens as modulation increases Built In Mo
7. PL 259 to BNC anten na plug adapter such as Cat No 278 120 Your local RadioShack store carries a wide variety of coaxial antenna cable and connectors 16 RW P AWS 21 1650 fm Page 17 Thursday August 5 1999 11 43 AM Follow the installation instructions sup plied with the antenna route the antenna cable to the TRC 237 then connect it to the antenna jack Cautions e Do not run the cable over sharp edges or moving parts e Do not run the cable next to power cables or other CB antenna cables e Do not run the cable through a vehi cle s engine compartment or other areas that produce extreme heat e Follow all cautions and warnings included with the antenna Warning When installing or removing a base station CB antenna use extreme caution If the antenna starts to fall let it go It could contact overhead power lines If the antenna touches the power line contact with the antenna mast cable or guy wires can cause electrocution and death Call the power company to remove the antenna DO NOT attempt to do so yourself 17 Z Ge S 21 1650 fm Page 18 Thursday August 5 1999 11 43 OPERATION Before you use your TRC 237 we recom mend you read CB Operation Tips on Page 21 which contains information to help you use it effectively and courteously RECEIVING TRANSMISSIONS AND ADJUSTING SQUELCH 1 If you did not connect an external antenna hold the TRC 237 so th
8. dioShack A Division of Tandy Corporation Fort Worth Texas 76102 811080960B 4A8 Printed in China RW
9. dulation Limiter Circuit automatically adjusts to a variety of voice levels to ensure a clear transmission PLL Phase Locked Loop Frequency Synthesizer provides reliable and ex act tuning Adjustable Squelch helps to eliminate noise between transmissions 1997 1998 Tandy Corporation All Rights Reserved RadioShack is a registered trademark used by Tandy Corporation 2 ww J As 21 1650 fm Page 3 Thursday August 5 1999 11 43 AM 2 Digit LED Display lets you easily see the selected channel number Automatic Noise Limiter ANL Circuit reduces noise caused by nearby elec trical equipment such as motors or auto motive ignition systems Battery Test Button and Battery Indica tor lets you check the batteries condi tion to find out if they need replacing Flexible Antenna with BNC Connector provides excellent reception and trans mission and is designed to help prevent antenna breakage Automatic Display Dimmer the chan nel display automatically brightens when you press most buttons Then after a few seconds it dims to save battery power Power Charging Jack lets you power your TRC 237 from an AC or DC power source so you can use the TRC 237 with out draining the batteries And lets you charge nickel cadmium batteries without removing them from the TRC 237 Note You need eight AA alkaline batter ies or ten nickel cadmium rechargeable batteries not s
10. e antenna is vertical 2 Turn on the TRC 237 by turning OFF VOLUME clockwise until you hear a click and a hissing sound 3 Set OUT CH9 CH19 on top of the TRC 237 for the channel you want to tune e To quickly tune to Channel 9 set it to CH9 9 flashes on the display e To quickly tune to Channel 19 set it to CH19 19 flashes on the dis play To tune to any channel other than Channel 9 or Channel 19 set it to OUT The previously selected channel number appears on the display Note When you tune a channel the channel s number appears or flashes on the display for about 20 seconds then fades to save battery power To continuously display the channel number press and hold DISPLAY on the side of the TRC 237 18 Z Ge S 21 1650 fm Page 19 Thursday August 5 1999 11 43 so0o0o00o00 ENN S989999 000000 OO e o E ee eae o a To redisplay the channel number for about 20 seconds simply press and release DISPLAY 4 If you set OUT CH9 CH19 to OUT repeatedly press CH s to select higher channels or CH t to select lower channels To move rapidly through the channels hold down CH sort 5 Adjust OFF VOLUME to a comfortable listening level 6 Adjust SQUELCH to cut out the back ground noise Wait until there is no signal on the channel then slowly turn SQUELCH clockwise until the background noise stops
11. external antenna is attached to the TRC 237 s antenna jack Be sure you are fully pressing PUSH TO TALK Be sure the batteries are not weak see Testing the Battery Power on Page 10 Channel select but tons do not work Make sure OUT CH9 CH19 is set to OUT 25 o p 498 J As 21 1650 fm Page 26 Thursday August 5 1999 11 43 AM MAINTENANCE Your RadioShack TRC 237 40 Channel 5 Watt CB Walkie Talkie with Channel 9 19 Priority Switch is an example of supe rior design and craftsmanship The follow ing suggestions will help you care for your TRC 237 so you can enjoy it for years Keep the TRC 237 dry If it gets wet wipe it dry immedi ately Liquids might contain minerals that can corrode the electronic circuits Handle the TRC 237 gently W and carefully Dropping it can damage circuit boards and cases and can cause the TRC 237 to work im properly Use and store the TRC 237 NU only in normal temperature environments Temperature extremes can shorten the life of electronic devices damage batteries and dis tort or melt plastic parts Keep the TRC 237 away from dust and dirt which can cause premature wear of parts Wipe the TRC 237 with a damp cloth occasionally to keep it looking new Do not use harsh chemicals clean ing solvents or strong deter gents to clean the TRC 237 Modifying or tampering with the TRC 237 s internal compone
12. g the CB cccssssssseresseeeeees 6 Using the POWER Jack and ALKALINE NI CD Switch 6 Using Batteries 0 eeeees 7 Testing the Battery Power 10 Recharging Nickel Cadmium Batterie Sinin u i 10 Using Vehicle Battery Power 12 Using AC Power eeeeeeteeenees 13 Connecting the Antenna 15 Connecting an Optional Antenna eee 16 OPC Matin asia sseccce As eeteeevecccescecseeece cnet 18 Receiving Transmissions and Adjusting Squelch 18 Transmitting 2 eceeeeeeeeeeeeeeeeeeeeee 20 CB Operation TipS seceesseeeeeeee 21 Common Uses for a CB Radio 21 Business USES cceeeees 21 Personal USES naese 21 Using Common 10 Codes 22 CB Courtesy sssini i 24 Maximum Range sessen 24 Troubleshooting c sseececeeeeeseeeees 25 Maintenance cccessseeeeeeeeeeeeeeees 26 Specifications ccccssesseeeeeeeeees 27 5 RW Ge S 21 1650 fm Page 6 Thursday August 5 1999 11 43 AM S POWERING THE CB You can power your TRC 237 from any of these sources none supplied e Eight AA alkaline batteries with the two supplied dummy batteries e Ten rechargeable AA nickel cadmium batteries e 12 volt vehicle battery power using a fused power cord e Standard AC power using a power supply USING THE POWER JACK AND ALKALINE NI CD SWITCH The POWER jack lets you connect an e
13. it several minutes before trying again e Do not press and hold PUSH TO TALK when you are not talking This is called dead keying e Assist callers with directions infor mation about road conditions and any other reasonable requests MAXIMUM RANGE The maximum range and quality of CB transmissions vary depending on these conditions e Amount of power in the batteries e The surrounding terrain moun tains and tall buildings limit the range e Weather conditions The number of nearby CBs operating on the same channel To ensure maximum range always keep fresh alkaline batteries or fully charged nickel cadmium batteries in your TRC 237 when using battery power 24 ww Ge S 21 1650 fm Page 25 Thursday August 5 1999 11 43 TROUBLESHOOTING If your TRC 237 is not working as it should follow these suggestions to see if you can eliminate the problem If you can not take it to your local RadioShack store for assistance Symptom Suggestion Weak bad or no recep tion Be sure the TRC 237 is turned on Be sure the volume is turned up Be sure the supplied flexible antenna or an external antenna is attached to the TRC 237 s antenna jack Be sure the batteries are not weak see Testing the Battery Power on Page 10 Be sure you are not pressing PUSH TO TALK Trouble with transmis sion Be sure the supplied flexible antenna or an
14. kel cadmium batteries never charge them in an area where the temperature is above 90 F 32 C or below 40 F 4 5 C 10 Z P AWS 21 1650 fm Page 11 Thursday August 5 1999 11 43 AM Follow these steps to charge nickel cadmium batteries in the TRC 237 1 Ifthe TRC 237 is on turn OFF VOLUME fully counterclockwise until it clicks to turn it off OUECHE cHia Sa OFF VOLUME SQUELCH 2 Set ALKALINE NI CD inside the bat tery compartment to NI CD see Us ing the Power Jack and ALKALINE NI CD Switch on Page 6 3 Connect the battery charger s 5 5 mm outer diameter 2 1 mm inner diameter barrel plug to the POWER jack on the side of the TRC 237 then plug the battery charger s plug into a standard AC outlet a l l It takes about 24 hours to charge new or fully discharged nickel cadmium batteries Subsequent charges take about 16 to 18 hours CODD O000000000 4 When charging is complete unplug the battery charger s plug from the AC outlet Then disconnect the bat tery charger s barrel plug from the POWER jack 5 If the TRC 237 is on turn OFF VOLUME fully counterclockwise until it clicks to turn it off Then set ALKALINE NI CD to ALKALINE 11 Z J As 21 1650 fm Page 12 Thursday August 5 1999 11 43 AM Note You can use an external charger such as Cat No 23 134 not sup plied to recharge the nickel cadmium
15. ly counterclockwise until it clicks to turn it off 2 Be sure ALKALINE NI CD inside the battery compartment is set to ALKA LINE 3 Insert the power cord s 5 5 mm outer diameter 2 1 mm inner diameter bar rel plug into the POWER jack 4 Plug the power cord s other end into your vehicle s cigarette lighter socket Note If the TRC 237 does not operate when you use the DC power cord unplug the cord from the cigarette lighter socket and clean any ashes or debris from the socket If your TRC 237 still does not work check the fuse in the DC power cord and replace it if necessary USING AC POWER You can power your TRC 237 from stan dard AC power using an optional AC to 12 V DC power supply such as Cat No 22 504 and an optional DC fused power cord such as Cat No 270 1533 ooo0000000000 13 Kll Ge S 21 1650 fm Page 14 Thursday August 5 1999 11 43 Cautions e The power supply must be able to deliver 12 volts and at least 1200 mil liamps of power The recommended power supply meets these specifica tions Using a power supply that does not meet these specifications could damage the TRC 237 or the power supply e You must use a DC fused cord that supplies 12 volts and delivers at least 1200 milliamps of power Its center tip must be set to positive and its barrel plug must correctly fit the TRC 237 s POWER jack The rec ommended fused cord meets these specificatio
16. ns Using a fused cord that does not meet these specifica tions could damage the TRC 237 or the fused cord e To help prevent an electrical short unplug the DC fused cord s plug from the AC adapter s power socket be fore you unplug the cord s barrel plug from the TRC 237 Follow these steps to connect the TRC 237 to AC power 1 If the TRC 237 is on turn OFF VOL UME fully counterclockwise until it clicks to turn it off 2 Connect the DC fused cord s 5 5 mm outer diameter 2 1 mm inner diame ter barrel plug to the TRC 237 s POWER jack 3 Be sure ALKALINE NI CD inside the battery compartment is set to ALKA LINE 4 Plug the DC fused cord s other end into the power supply s power socket 5 Plug the power supply into a stan dard AC outlet then turn on the pow er supply 14 ww P AWS 21 1650 fm Page 15 Thursday August 5 1999 11 43 AM Note If the TRC 237 does not operate when you use the DC fused cord turn the power supply off unplug the cord from the power supply s power socket then clean any debris from the socket If your TRC 237 still does not work check the fuse in the DC fused cord and replace it if neces sary CONNECTING THE ANTENNA Caution To prevent damage to your TRC 237 you must connect an antenna before you operate it Follow these steps to attach the supplied flexible antenna to your TRC 237 1 Align the slots around the antenna s connect
17. nts can cause a malfunc tion and might invalidate your TRC 237 s warranty and void your FCC authorization to operate it If your TRC 237 is not per forming as it should take it to your local RadioShack store for assistance 26 ww J As 21 1650 fm Page 27 Thursday August 5 1999 11 43 AM SPECIFICATIONS Receiver Frequency Coverage 26 965 27 405 MHz Sensitivity Max 0 5 uV at 10 dB S N N Adjacent Channel Rejection 45 dB Squelch Adjustable from 1 uV to 1 mV Audio Output 10 THD 400 mW Current Drain eee 85 450 mA Transmitter Frequency Coverage 26 965 27 405 MHz Power Input at 12V DC Highs an etat 5W COW a r e ae a cee ataa eae cee os 2 W Power Output FIQN a i iaie a 2 5 W COW ee ora a aeara E a In tteete 1W Spurious Emission 67 dB or better Type of Modulation s e A3 Frequency Tolerance n se 0 002 Antenna Impedance eee eee 50Q Antenna Length eee eeeeeeeeee 10 In 25 4 cm Current Drain High 2s cosas Materiales 650 mA LOW 4 tue ccvceces A T 450 mA Dimensions HWD 7 2x Blax 2 s In 190 x 70 x 54 mm Weight sea sdita werden se 11 8 oz 334 g Specifications are typical individual units might vary Specifications are subject to change and improvement without notice 27 ww Ge 21 1650 fm Page 28 Thursday August 5 1999 11 43 AM Limited Ninety Day War
18. or with the tabs on the antenna jack on top of the TRC 237 2 Press the antenna down over the jack and turn the antenna s base clockwise until it locks into place To remove the antenna turn the anten na s base counterclockwise until it un locks then lift it off the antenna jack 15 d J As 21 1650 fm Page 16 Thursday August 5 1999 11 43 AM Connecting an Optional Antenna Your walkie talkie comes with a flexible antenna that is ideal for most applications However the walkie talkie s antenna jack makes it easy to connect other types of antennas too For mobile or base station use you might want to connect an option al external antenna Your local Ra dioShack store carries a wide selection of external mobile or outdoor base station antennas Choose the one that best meets your needs When deciding on a mobile or base station antenna and its location consider the following e The location of the antenna should be as high as possible e The antenna and antenna cable should be as far as possible from sources of electrical noise appli ances other radios and so on e The antenna should be vertical for the best performance Note When connecting an optional an tenna always use 50 ohm coaxial cable such as RG 58 or RG 8 For lengths over 50 feet use RG 8 low loss dielectric coax ial cable If the coaxial cable s connector does not fit into the antenna jack you might also need a
19. ranty This product is warranted by RadioShack against manu facturing defects in material and workmanship under nor mal use for ninety 90 days from the date of purchase from RadioShack company owned stores and authorized RadioShack franchisees and dealers EXCEPT AS PRO VIDED HEREIN RadioShack MAKES NO EXPRESS WARRANTIES AND ANY IMPLIED WARRANTIES IN CLUDING THOSE OF MERCHANTABILITY AND FIT NESS FOR A PARTICULAR PURPOSE ARE LIMITED IN DURATION TO THE DURATION OF THE WRITTEN LIMITED WARRANTIES CONTAINED HEREIN EX CEPT AS PROVIDED HEREIN RadioShack SHALL HAVE NO LIABILITY OR RESPONSIBILITY TO CUS TOMER OR ANY OTHER PERSON OR ENTITY WITH RESPECT TO ANY LIABILITY LOSS OR DAMAGE CAUSED DIRECTLY OR INDIRECTLY BY USE OR PERFORMANCE OF THE PRODUCT OR ARISING OUT OF ANY BREACH OF THIS WARRANTY INCLUD ING BUT NOT LIMITED TO ANY DAMAGES RESULT ING FROM INCONVENIENCE LOSS OF TIME DATA PROPERTY REVENUE OR PROFIT OR ANY INDI RECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES EVEN IF RadioShack HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES Some states do not allow the limitations on how long an implied warranty lasts or the exclusion of incidental or consequential damages so the above limitations or ex clusions may not apply to you In the event of a product defect during the warranty pe riod take the product and the RadioShack sales receipt as proof of purchase date to any RadioShack store Ra dioShack will at its op
20. tion unless otherwise provided by law a correct the defect by product repair without charge for parts and labor b replace the product with one of the same or similar design or c refund the pur chase price All replaced parts and products and prod ucts on which a refund is made become the property of RadioShack New or reconditioned parts and products may be used in the performance of warranty service Re paired or replaced parts and products are warranted for the remainder of the original warranty period You will be charged for repair or replacement of the product made af ter the expiration of the warranty period This warranty does not cover a damage or failure caused by or attributable to acts of God abuse accident misuse improper or abnormal usage failure to follow in structions improper installation or maintenance alter ation lightning or other incidence of excess voltage or current b any repairs other than those provided by a RadioShack Authorized Service Facility c consumables such as fuses or batteries d cosmetic damage e transportation shipping or insurance costs or f costs of product removal installation set up service adjustment or reinstallation This warranty gives you specific legal rights and you may also have other rights which vary from state to state RadioShack Customer Relations Dept W 100 Throck morton St Suite 600 Fort Worth TX 76102 We Service What We Sell 3 97 Ra
21. upplied to power your TRC 237 We recommend you record the TRC 237 s serial number here The serial number is located on the radio s back panel 3 ww J As 21 1650 fm Page 4 Thursday August 5 1999 11 43 AM FCC INFORMATION The Federal Communications Commis sion FCC does not require you to have a license to operate this walkie talkie However the FCC does require that you read and know Part 95 of FCC Rules These rules apply to the operation of a Class D CB We have provided a copy of these regulations with your TRC 237 Internal adjustments and or modifications can lead to illegal operation as defined by Part 95 of FCC Rules Such illegal opera tion can lead to very serious consequenc es To be safe and sure e Never open your TRC 237 s case e Never modify your TRC 237 Your TRC 237 might cause TV or radio interference even when it is operating properly To determine whether your TRC 237 is causing the interference turn off your TRC 237 If the interference goes away your TRC 237 is causing it Try to eliminate the interference by e Moving your TRC 237 away from the TV or radio e Contacting your local RadioShack store for help Warning Do not open your TRC 237 to make any internal adjustments Any inter nal adjustments should be made only by authorized service personnel 4 ww J As 21 1650 fm Page 5 Thursday August 5 1999 11 43 AM CONTENTS Powerin
22. x ternal power source such as your vehi cle s battery power or AC power or connect a battery charger to charge nickel cadmium batteries while they are in the TRC 237 ae O l P 6 pea Jol L j eE The TRC 237 also has a slide switch AL KALINE NI CD inside the battery com partment that you must set correctly depending on what power source you are using and whether or not you want to charge rechargeable batteries while they are in the TRC 237 6 Z P AWS 21 1650 fm Page 7 Thursday August 5 1999 11 43 AM ALKALINE NI CD lj UU L _ amp Ta An y LE e Set it to ALKALINE before you con nect an external power source vehi cle battery power or AC adapter to the POWER jack or while you are us ing internal batteries alkaline or re chargeable e Set it to NI CD only when you con nect a battery charger to the POWER jack to charge the installed recharge able batteries Warning To avoid injuring yourself or damaging the TRC 237 connect a bat tery charger to the POWER jack only when nickel cadmium batteries are in stalled see Recharging Nickel Cadmium Batteries on Page 10 Never try to re charge non rechargeable batteries They could get very hot and explode Note You can connect an external pow er source for power regardless of the type of batteries you installed
23. y the polarity symbols and marked inside 5 ALKALINE O Ni co Note Before you use the TRC 237 with nickel cadmium batteries you need to charge the batteries see Recharging Nickel Cadmium Batter ies on Page 10 6 Replace the battery compartment cover and the strap on the back of the TRC 237 Cautions e If you will not be powering the TRC 237 from internal batteries for sev eral months remove the batteries e Dispose of old batteries promptly and properly 9 d P AWS 21 1650 fm Page 10 Thursday August 5 1999 11 43 AM Testing the Battery Power 1 Turn on the TRC 237 by rotating OFF VOLUME clockwise until it clicks 2 Hold down BATT TEST If the indica tor lights there is enough battery power to operate the CB If the indi cator is dim or does not light replace or recharge the batteries Recharging Nickel Cadmium Batteries You can use a battery charger Cat No 23 249 not supplied to charge or re charge nickel cadmium batteries while they are inside the TRC 237 s battery compartment Do not use the TRC 237 while you are charging the nickel cadmium batteries Cautions e Use only the recommended battery charger to recharge the batteries in the TRC 237 Other chargers could damage your TRC 237 or the batter ies e Be careful not to overcharge nickel cadmium batteries To prevent damage to rechargeable nic
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