Motorola TIMEPORT 280 Service Manual Download Page 51

Page: 51 / 64

6881038B15

May 14, 2001

Index-1

Level III Service Manual Index

Index

accessories

part numbers

alert modes

antenna, removing and replacing

battery

function

gauge

removing

battery door

removing

caller ID

Canadian Interference-Causing Equipment regulations

changes

product

closed user group

commands, manual test mode

controls

conventions

copyrights

computer software

disassembly

display animation

exploded view diagram

exploded view parts list

FCC rules

features

call diverting

caller ID

text entry

voice recognition

Wireless Access Protocol (WAP)

identification

international mobile station equipment identity

mechanical serial number

product

IMEI

Introduction

keypad keys, removing and replacing

29, 32 , 33

keypad PCB, removing and replacing

27, 31

LCD

liquid crystal display (LCD)

manual test mode

microphone, removing and replacing

MSN

names

product

overview

part numbers

accessories

parts

exploded view diagram

exploded view parts list

product

changes

identification

names

publications, related

rear housing

removing

regulatory agency compliance

related publications

removing

1 and 2
Index

B58
6881038B15

Summary of Contents for TIMEPORT 280

Page 1: ...Level III Service Manual Product Family B58 Tri Band Mobile Telephone Timeport 280 GSM 900 1800 1900 MHz GPRS Technologies ...

Page 2: ......

Page 3: ...oving and Replacing the Rear Housing 18 Removing and Replacing the RF Grommet and the Alert Transducer 20 Removing and Replacing the Battery Latch 22 Removing and Replacing the Battery Cover Latch 23 Removing and Replacing the RTC Battery 24 Removing and Replacing the Transceiver Board 25 Removing and Replacing the Display Module Assembly 26 Removing and Replacing the Keypad Switch Dome Array 27 R...

Page 4: ...May 14 2001 6881038B15 Table of Contents P280 Part Number Charts 42 Exploded View Diagram 42 Exploded View Parts List 43 Model dependent Part Numbers 44 Accessories 45 Related Publications 45 Index Index 1 ...

Page 5: ...ded in Product Family B58 PF B58 telephones are listed on the front cover Product names are subject to change without notice Some product names as well as some frequency bands are available only in certain markets Product Changes When electrical mechanical or production changes are incorporated into Motorola products a revision letter is assigned to the chassis or kit affected for example A B or C...

Page 6: ...es proper installation operation and maintenance of PF B58 telephones Refer questions about this manual to the nearest Customer Service Manager A product family is the group of products having the same Account Product Code APC To locate the APC on a device refer to Mechanical Serial Number MSN later in this manual Audience This document aids service personnel in testing and repairing PF B58 teleph...

Page 7: ...arly on after the date of sale are to be returned to Manufacturing for root cause analysis to guard against epidemic criteria Manufacturing to bear the costs of early life failure Product Support Customer s original units will be repaired but not refurbished as standard Appoint ed Motorola Service Hubs will perform warranty and non warranty field service for level 2 assemblies and level 3 limited ...

Page 8: ...in country help desks Product Service training should be arranged through the local Motorola Support Center Ordering Replacement Parts Only centers authorized to carry out repairs can purchase spare parts Orders for spare parts from hubs and Hi Tech Centers should be placed with the regional Motorola Parts Distribution Center ...

Page 9: ...98 5 cc 5 9 in3 with 500 mAh battery 104 5 cc 6 3 in3 with 800 mAh battery Weight 109 gm 3 9 oz with 500 mAh battery 119 gm 4 2 oz with 800 mAh battery Temperature Range 10 C to 55 C 15 F to 130 F Battery Life 500 mAh LI Ion Battery Talk Time 120 to 162 minutes Standby 96 to 158 hours Battery Life 800 mAh LI Ion Battery Talk Time 192 to 259 minutes Standby 153 to 253 hours Transmitter Function Spe...

Page 10: ...ess The virtual nature of this connection means that network resources are not consumed during periods when a user is not actually sending or receiving data PF B58 telephones are made of a polycarbonate plastic The display and speaker as well as the keypad transceiver printed circuit board PCB microphone external accessory connector volume buttons power button and voice button are contained within...

Page 11: ...k and management tools that make it easy to store and maintain a list of personal memos Wireless Access Protocol WAP 1 1 Compliancy In the WAP environment access to the Internet is initiated in wireless markup language WML which is derived from hypertext markup language HTML The request is passed to a WAP gateway which retrieves the information from the server in standard HTML subsequently filtere...

Page 12: ...number will be displayed In the event thatno calleridentification information isavailable the message INCOMING CALL is displayed Call Forwarding Call forwarding is a network feature that diverts incoming calls to another phone number if the user or phone is unavailable or the user does not wish to receive calls This option can be used to Divert all incoming voice calls unconditionally Divert incom...

Page 13: ... and Indicators Locations Power Button Service Indicator Press the button to either turn on or off your phone The multi color indicator let s you know the status of your wireless service Headset Jack For connection to one of our optional handsfree headsets for those private handsfree conversations Volume Keys up down Select the volume that best suites the environment you are in Even noisy public E...

Page 14: ...m out side the user s home network When leaving the home network area the phone roams or seeks another network Message Waiting Indicator Appears when the phone receives a text mes sage This is a network dependent feature Voice Message Waiting Indicator Appears when a voicemail message is received This is a network dependent feature Battery Level Indicator Shows the amount of charge left in the bat...

Page 15: ... 3 shows the PF B58 telephone menu structure Alert Settings PF B58 telephones include up to 32 preset alert tones and vibrations that can be applied individually to specific alert events or to all events at the same time 010392o Figure 3 PF B58 Menu Structure Pressing either volume key will mute the alert ...

Page 16: ...e to immediately shut down and any pending work for example partially entered phone book entries or outgoing messages is lost Operation For detailed operating instructions refer to the appropriate User s Guide listed in the Related Publications section toward the end of this manual To ensure proper memory retention turn the phone OFF before removing the battery Immediately replace the old battery ...

Page 17: ...ctrostatic discharge ESD 6680388B67 Disassembly tool plastic with flat and pointed ends manual opening tool Used during assembly disassembly of device RSX4043 A Torque Driver Used to remove and replace screws Torque Driver Bit T 6 Plus Apex 440 6IP Torx Plus or equivalent Used with torque driver 6680388B01 Tweezers plastic Used during assembly disassembly Pliers long nose Used during assembly disa...

Page 18: ...e battery cover release and slide the battery cover in the direction of the arrow see Figure 4A G Many of the integrated devices used in this equipment are vulnerable to damage from electrostatic discharge ESD Ensure adequate static protection is in place when handling shipping and servicing the internal components of this equipment G Avoid stressing the plastic in any way to avoid damage to eithe...

Page 19: ...ery match the battery contacts in the phone 6 Slide the top of the battery into the receptacle molded into the housing then press the bottom end of the battery securely into the battery compartment until it locks into place 7 Line up the battery cover with the rear housing then push it forward until it snaps firmly in place 010394o Figure 5 Removing the battery E There is a danger of explosion if ...

Page 20: ...tate the SIM holder upward and slide out the SIM card as shown in Figure 6B 4 To replace carefully insert the SIM card into the slot in the holder Be sure the SIM is correctly positioned to contact the terminals when closed 5 Close the holder and slide to lock in place 6 Replace the battery and battery cover as described in the procedures 010395o Figure 6 Removing the SIM card SIM CARD SIM CARD HO...

Page 21: ...ds are completely disengaged pull the antenna straight out of the phone housing to remove 4 To replace insert the threaded end of the antenna carefully into the housing and after ensuring the threads are properly engaged tighten firmly by hand 5 Replace the battery and battery cover as described in the procedures 010396o Figure 7 Removing the antenna G To prevent damage to antenna or housing ensur...

Page 22: ...ith the cavity molded into the rear housing 4 Press the escutcheon firmly into place making sure pressure is applied evenly across the entire surface to ensure a tight bond 5 Replace the antenna battery and battery cover as described in the procedures Removing and Replacing the Rear Housing 010397o Figure 8 Removing the rear escutcheon G This product contains static sensitive devices Use anti stat...

Page 23: ...ed in the procedures 2 Locate the 6 screws holding the front housing to the rear housing See Figure 9A 3 Using the Torx driver with a T6 bit remove the 6 screws and set aside for reuse 010398o Figure 9 Removing the Rear Housing HOUSING CATCH 2 PLACES FRONT HOUSING REAR HOUSING TRANSCEIVER BOARD ASSEMBLY SCREW SCREW SCREW SCREW SCREW SCREW B A C ...

Page 24: ...and tighten firmly Do not over tighten 8 Replace the rear escutcheon antenna SIM card battery and battery cover as described in the procedures Removing and Replacing the RF Grommet and the Alert Transducer 1 Remove the battery cover battery SIM card antenna rear escutcheon and rear housing as described in the procedures 2 Using the flat end of the disassembly tool carefully loosen the RF grommet a...

Page 25: ...ar housing See Figure 10B 5 To replace the alert transducer remove the protective backing from the new transducer then press the transducer into place in the rear housing cavity Be sure the transducer is straight and fully seated in the cavity 6 Replace the rear housing rear escutcheon antenna SIM card battery and battery cover as described in the procedures G The alert transducer is fastened to t...

Page 26: ...he 2 battery latch catches inward to release the battery latch from the housing Slide the latch downward and lift from the housing as shown in Figure 11B 4 To replace slide the latch into the housing until it locks into place 5 Carefully reinstall the spring and verify proper operation of the latch by temporarily inserting a battery into the housing 6 Replace the rear housing rear escutcheon anten...

Page 27: ...Figure 12A 3 Remove the battery cover latch spring from the housing Set aside for reuse 4 To replace set the battery cover latch spring on its post in the rear housing then insert the latch into its rear housing cavity until it snaps into place Verify proper operation of the latch by temporarily installing a battery cover 5 Replace the rear housing rear escutcheon antenna SIM card battery and batt...

Page 28: ...ceiver board as shown in Figure 13 3 To replace align the new RTC battery with the holder so its positive contact is facing upward then snap the battery in place until it is completely seated in the holder 4 Replace the rear housing rear escutcheon antenna SIM card battery and battery cover as described in the procedures G Dispose of used batteries according to the manufacturer s instructions 0104...

Page 29: ...sceiver board with the front housing and gently press into place 5 Replace the rear housing rear escutcheon antenna SIM card battery and battery cover as described in the procedures G This product contains static sensitive devices Use anti static handling procedures to prevent electrostatic discharge ESD and component damage 010403o Figure 14 Removing the transceiver board Ensure the keypad and th...

Page 30: ... the procedures 2 Locate the 4 display module mounting tabs shown in Figure 15A G The flex cable connecting the display module to the transceiver board is easily damaged Exercise care when handling 010404o Figure 15 Removing the display module assembly DISPLAYMODULE TRANSCEIVER BOARD ASSEMBLY DISPLAY MODULE MOUNTING TAB 4 PLACES DISASSEMBLY TOOL PLASTIC TWEEZER LCD FLEX CONNECTOR A B Side Rear Fro...

Page 31: ...e display module mounting tabs with the corresponding cut outs in the transceiver board then press together until the display module snaps into place 8 Replace the transceiver board rear housing rear escutcheon antenna SIM card battery and battery cover as described in the procedures Removing and Replacing the Keypad Switch Dome Array 1 Remove the battery cover battery antenna rear escutcheon rear...

Page 32: ...rectly positioned on the transceiver board as shown in Figure 17 6 Apply even pressure across the entire surface of the switch dome array to ensure proper adhesion 7 Replace the display module transceiver board rear housing rear escutcheon antenna SIM card battery and battery cover as described in the procedures 8 Verify correct operation G Do not touch the adhesive on the back of the keypad switc...

Page 33: ...n the procedures 2 Lift the keypad from the front housing as shown in Figure 18 3 To replace insert the keypad into the front housing ensuring the keys align properly with the openings in the front housing 4 Replace the transceiver board rear housing rear escutcheon antenna battery and battery cover as described in the procedures 010407o Figure 18 Removing the keypad KEYPAD FRONT HOUSING DISASSEMB...

Page 34: ...the microphone cavity Be sure the open end of the microphone is facing the front housing Press the micro phone assembly firmly into place ensuring it is straight and completely seated in its cavity 4 Replace the keypad transceiver board rearhousing rear escutcheon antenna battery and battery cover as described in the procedures G This product contains static sensitive devices Use anti static handl...

Page 35: ...ton from the front housing The plastic tweezer may be useful when removing the buttons See Figure 20 3 To replace insert the buttons into their respective front housing cavities ensuring each button is properly aligned and seated within the housing 4 Replace the transceiver board rear housing rear escutcheon antenna battery and battery cover as described in the procedures 010409o Figure 20 Removin...

Page 36: ... replace insert the IR port lens into its front housing cavity Be sure the lens is properly aligned and fully seated within the front housing 4 Replace the transceiver board rear housing rear escutcheon antenna battery and battery cover as described in the procedures Removing and Replacing the Speaker 1 Remove the battery cover battery antenna rear escutcheon rear housing transceiver board and IR ...

Page 37: ... the IR port lens transceiver board rear housing rear escutcheon antenna battery and battery cover as described in the procedures Removing and Replacing the Lens 1 Remove the battery cover battery antenna rear escutcheon rear housing transceiver board keypad microphone volume buttons voice button power button IR port lens and speaker as described in the procedures G The speaker is fastened to the ...

Page 38: ...align the lens with the front housing and rotate the lens downward to engage the lens top catches 8 Apply even pressure across the adhesive area of the lens to bond it to the housing Ensure the lens is straight and flush with the front housing 9 Replace the speaker IR port lens voice button power button volume buttons microphone keypad transceiver board rear housing rear escutcheon anten na batter...

Page 39: ...k Identification Each Motorola GSM device is labelled with a variety of identifying numbers The following information describes the current identifying labels Mechanical Serial Number MSN The Mechanical Serial Number MSN is an individual unit identity number and remains with the unit throughout the life of the unit The MSN can be used to log and track a unit on Motorola s Service Center Database T...

Page 40: ...m illustrates the various parts of this number Other label number configurations present are TRANSCEIVER NUMBER Identifies the product type Normally the SWF number i e V100 PACKAGE NUMBER Identifies the equipment type mode and language in which the product is shipped 000808 O Figure 25 IMEI Label Breakdown IMEI 16 Digits 6 Digits 2 Digits 6 Digits 2 Digits TAC FAC SNR IU Type Approval Code Distrib...

Page 41: ...slot 5 Replace the battery as described in the procedures 6 Press to turn the phone ON Manual Test Mode Commands Table 2 Manual Test Commands Key Sequence Test Function Name Remarks Menu 048263 Enter manual test mode End Key Exit manual test mode 54 Suspend Required for all Test Mode Operations 0 0 0 Select tone 0 0 0 1 Select tone 1 0 0 2 Select tone 2 0 0 3 Select tone 3 0 0 4 Select tone 4 0 0 ...

Page 42: ... Set band PCS 1900 10 0 6 Set dual band GSM 900 1800 10 1 0 Read band 3 GSM 4 DCS 5 PCS 6 GSM DCS 18 0 Initialize non volatile memory Master Reset 18 1 Initialize Non volatile memory Master Clear 55 2 001 Test Display All pixels ON 55 2 000 Test Display All pixels OFF 55 2 002 Test Display Checkerboard pattern A 55 2 003 Test Display Checkerboard pattern B 55 2 004 Test Display Border pixels ON 06...

Page 43: ...ll present proceed to b b Transceiver board assembly defective Replace the transceiver board assembly refer to 1c Verify that the fault has been cleared and reassemble the unit with the new transceiver board assembly 3 Display is erratic or provides partial or no display a Mating connections to or from transceiver board faulty Remove rear housing from unit check general condition of flex connector...

Page 44: ...nown good SIM card into the telephone Power up the unit and confirm that the card has been accepted If the fault no longer exists replace the defective SIM card If the SIM card is not at fault proceed to b b Transceiver board assembly defective Replace the transceiver board assembly refer to 1c Verify that the fault has been cleared and reassemble the unit with the new transceiver board assembly 8...

Page 45: ...ay 14 2001 41 Level III Service Manual Troubleshooting Programming Software Upgrade and Flexing Contact your local technical support engineer for information about equipment and procedures for flashing and flexing ...

Page 46: ...0 Part Number Charts The following charts are provided as a reference for the parts associated with PF B58 telephones Exploded View Diagram 010249 O Figure 26 Exploded View Diagram 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 14 14 19 20 21 22 24 23 ...

Page 47: ...88588K01 Dust Gasket 7 3888923K01 Volume Button 24 5085600J01 Microphone 8 3888924K01 Voice Activation Button 25 9 7289437K04 Display Module Assembly 26 10 See Note 1 Transceiver Board Assembly 27 11 5089001K01 Alert 28 12 8586336P01 Antenna Jade 29 13 4109494U03 Spring Battery Door Button 30 14 0309315B07 Screw Torx 6 1 8 6 31 15 1588617K02 Panther 2 Battery Door Button 32 16 See Table 5 Rear Esc...

Page 48: ...eport 1388836K04 18 Battery Door Painted Matte Silver 800mAh 1588098L02 18 Battery Door Painted Marine Silver 800mAh 1588098L03 18 Battery Door Painted Smoked Silver 800mAh 1588098L04 18 Battery Door Painted Graphite 800mAh 1588098L09 18 Battery Door Painted Matte Silver 500mAh 1588097L02 18 Battery Door Painted Marine Silver 500mAh 1588097L03 18 Battery Door Painted Smoked Silver 500mAh 1588097L0...

Page 49: ...sal Brazil SPN4738 Adapter Euro Plug SPN4940 Adapter UK Plug SPN4739 Adapter Aus NZ Plug SPN4741 Adapter India Plug SPN4744 Adapter Korea Plug SPN4756 Dual Pocket Desktop Charger Base English Label SPN4772 Dual Pocket Desktop Charger Base Chinese Label SPN4773 Vehicle Power Adapter SYN7818 Easy Install Hands Free Car Kit analog audio SYN8597 Headset Jewel Case SYN7453 Headset with Boom Microphone ...

Page 50: ...46 May 14 2001 6881038B15 Part Number Charts P280 ...

Page 51: ...call diverting 8 caller ID 8 text entry 7 voice recognition 7 Wireless Access Protocol WAP 7 I identification 35 international mobile station equipment identity 36 mechanical serial number 35 product 1 IMEI 36 Introduction 1 K keypad keys removing and replacing 29 32 33 keypad PCB removing and replacing 27 31 L LCD 10 liquid crystal display LCD 10 M manual test mode 37 microphone removing and repl...

Page 52: ... S serial number mechanical 35 service manual about 2 revisions 3 scope 2 service policy 3 customer support 4 out of box failure 3 product support 3 replacement parts 4 shut down upon battery removal 12 SIM card 35 removing 16 replacing 16 support customer 4 product 3 T test equipment 13 text entry 7 tools 13 transceiver board removing 20 25 troubleshooting 37 manual test mode 37 manual test mode ...

Page 53: ...X 5V RX_ACQ RF_V1 RF_V2 BFSR BDR BCLKR Q200 GP04 GP05 RF_V2 RVCO RVCO N_TXVCO PAC_275 RF_V2 EXC_EN N_RVCO N_GSM_SEL Q351 U402 Q202 Q202 Q202 RF_V2 N_DCS_SEL PAC_275 DCS_SEL N_TX_EN RF_V2 DCS_SEL DCS_SW RX_EN N_DCS_SEL RX_EN RF_V2 N_DCS_SW RF_V2 N_EXC_EN GSM_EXC_EN EXC_EN EXC_EN N_GSM_SEL Q203 U110 GSM_EXC_SW 5V N_GSM_EXC_EN N_GSM_EXC_SW 5V U110 U120 Q204 U120 CR201 RF_V1 MAGIC_13MHz CLK_SELECT DM_...

Page 54: ... V_BUCK EXT_B BATT B UTXD_VDOUT BATT CR902 CR932 Q932 Q942 URXD_USBVM URTS_USBXRXD UCTS UDSR UDTR UDCD URI INT5 INT4 UTXD2 RW_N CE4 CE2 FLASH_CS BRST_CLK ADV_N ECB_N EB0_N EB1_N OE_N CE5 CE3 CE1 V3 V2 IVDD JVDD OVCC V3 V2 CR700 V2 V3 V3 V3 V3 V2 V2 JTAG DVDD EVDD BVDD CVDD MOD HVDD AVDD CLK_SELECT STBY GCAP_CLK OC3 WDOG RESET_OUT RESET INT3 U700 SIM_TX SIM_RX SIM_RST SIM_CLK VSIM_EN SIM_PD0 SIM_TX...

Page 55: ...S_SW 9 N_DCS_SW DCS_SEL N_RVCO GSM_EXC_EN N_GSM_EXC_EN 1 5V 3 2V 1 5V 3 2V PCS 1850 1910MHz EGSM 880 915Mhz DCS 1710 1785MHz PCS 1850 1910MHz EGSM 1325 1360Mhz DCS 1405 1480MHz PCS 1530 1590MHz 2 75V 2 75V EGSM CH 37 942 4Mhz DCS CH 700 1842 8MHz PCS CH 661 1960MHz RX MID CHANNELS GSM CH 62 947 4 MHz EGSM CH 37 1342 4Mhz DCS CH 700 1442 8MHz PCS CH 661 1560MHz RX VCO MID CHANNELS GSM CH 62 1347 4 ...

Page 56: ...0 IRDA_TX IRDA_RX G14 H11 5 6 7 IRDA V2 V3 3 8 BATT_FDBK 2 INT4 INT5 13 14 OPTION1 OPTION2 UCDC UDTR UCDC UDTR SPK SPK HS_SPKR J650 AUX_MIC 4 3 2 1 2 J910 N1 M2 B1 B2 3 4 J910 1 2 J3 J1 Mic Alert J904 J902 SPK ON_OFF PWR_SW AUDIO_OUT 15 K3 ON_OFF D6 J5 AUDIO_IN NC 16 9 11 1 17 20 BATT_FDBK EXT_BATT 3 SW_B Q600 B SW_B _EN D6 SW_B _EN D14 G10 F13 C9 E9 7 U700 PATRIOT U900 GCAP3 U702 U703 2 Mbit SRAM...

Page 57: ...P280 BOARD LAYOUT PAGE 1 2 ...

Page 58: ...P280 BOARD LAYOUT PAGE 2 2 ...

Page 59: ...1 4 5 8 9 12 13 16 2 6 7 14 R GCAP_13MHz C6CLK_IN C7 A7 A6 FQ32kHz XTAL1 XTAL2 GCAP_CLK A2 F14 L3 CKIL CKOH_SCC_CLK CKIH 22 23 5 2 10 14 3 13 2 3 11 10 from MagicDM N_DCS_SEL RVCO RF_V2 RX_EN N_GSM_SEL PAC_275 DCS RX ANTENNA SIGNAL GSM PCS RX ANTENNA SIGNAL FILTERED DCS RX ANTENNA SIGNAL FILTERED GSM RX ANTENNA SIGNAL FILTERED PCS RX ANTENNA SIGNAL AMPLIFIED IF 400MHz BFSR SIGNAL TO PATRIOT BDR SI...

Page 60: ...AL FILTERED DCS RX ANTENNA SIGNAL FILTERED GSM RX ANTENNA SIGNAL FILTERED PCS RX ANTENNA SIGNAL AMPLIFIED IF 400MHz BFSR SIGNAL TO PATRIOT BDR SIGNAL TO PATRIOT BCLKR SIGNAL TO PATRIOT RX SPEAKER LINE RX SPEAKER LINE RX VCO TUNING VOLTAGE RX TX VCO FEEDBACK LINE TO MAGIC TX MIC LINE BCLKX SIGNAL TO MAGIC BDX SIGNAL TO MAGIC TX VCO TUNING VOLTAGE MAGIC_13MHz TO PATRIOT A B C D E F G H I J K L M N R...

Page 61: ...104 9109487U02 400MHz U1907 5162852A59 MAX4599EXT J100 0987984K02 CONN_J U1908 5162852A59 MAX4599EXT J650 0987837L01 CONN_J U1909 5162852A59 MAX4599EXT J700 0987817K02 CONN_J U1912 4809788E06 UDZTE 176 8B J900 3909426M04 C707 U201 5109879E50 79E50 J901 0987636K06 CONN_J U300 4809283D80 ATXN1007T J902 3988929K01 CONTACT U350 4809283D90 ATXN1000B J904 3988929K01 CONTACT U400 5109923D50 23D50 J912 39...

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Page 63: ...ueSync is a trademark of Starfish Inc a wholly owned independent subsidiary of Motorola Inc All other product or service names are the property of their respective owners 2001 Motorola Inc All rights reserved Personal Communications Sector 1500 Gateway Blvd Boynton Beach FL 33426 8292 Printed in U S A 05 01 6881038B15 6881038B15 O ...

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