Page 1 AMENDMENT INSTRUCTION NO. 234a AL2 TO TM1188 ISSUE 1 RPR 550IS SERIES PAGING RECEIVERS OCTOBER 1998 PLEASE NOTE THAT THIS AMENDMENT INSTRUCTION (No. 234a) REPLACES INSTRUCTION No. 234 WHICH HAD A PAGE ERROR. PLEASE DESTROY ANY COPIES OF INSTRUCTION 234 YOU MAY HAVE RECEIVED AND USE THE PAGES SUPPLIED WITH THIS INSTRUCTION SHEET INSTEAD.
Page 2 7-1/7-2 Contents List updated. 7-9/7-10 Drawing now at Issue 2. 7-21/7-22 Drawing now at Issue 4. 7-23/7-24 Drawing now at Issue 4. With the compliments of Multitone Electronics plc PCN Nos. 4883, 4899, 5031, 5183 Page 2 TPF003-01 [August 1996]...
Page 3 RPR 550IS Series TECHNICAL MANUAL RADIO PAGING RECEIVERS MODELS RPR 551IS, RPR 552IS AND RPR 553IS Printed and published in England TM1188 Issue 1 AL2 (Oct. 98) Page (i)
Page 4: Company Liability
The information in this manual has been carefully compiled and checked for technical accuracy. Multitone Electronics plc accept no liability for inaccuracies or errors. In line with the company policy of technical advancement, the information within this document may be changed.
Page 5 RPR 550IS Series CONTENTS Page (i) Title Page Page (ii) Company Liability Page (iii) Contents Page (iv) (v) Effective Page List Page (vi) Safety Summary Warnings Page (vii) Cautions FCC Part 15 Compliance Section 1 Introduction and Specification Section 2 Operating Instructions Section 3 Technical Description...
Page 6 RPR 550IS Series EFFECTIVE PAGE LIST Page No. Issue Page No. Issue Page No. Issue Page No. Issue 2-11 3A-1 5-17 (ii) 1 AL2 2-12 3A-2 5-18 (iii) 2-13 3A-3 5-19 (iv) 1 AL2 2-14 3A-4 5-20 1 AL2 2-15 3A-5 5-21 (vi)
Page 7 RPR 550IS Series EFFECTIVE PAGE LIST (Continued) Page Issue Page No. Issue Page No. Issue Page No. Issue 1 AL1 1 AL2 7-13 7-27 1 AL1 1 AL2 7-14 7-28 1 AL1 1 AL1 7-3/4 7-15/16 1 7-29/30 1 1 AL2 7-31/32 1 7-17 1 AL2...
Page 8: Safety Summary
RPR 550IS Series SAFETY SUMMARY The following information applies to both operating and servicing personnel. General Warnings and Cautions will be found throughout the manual where they apply. WARNING statements identify conditions or practices that could result in injury or loss of life. CAUTION statements identify conditions or practices that could result in equipment damage.
Page 9 MAINTENANCE AND REPAIRS TO THIS EQUIPMENT MAY ONLY BE CARRIED OUT BY MULTITONE AUTHORISED PERSONNEL. LIABILITY IS NOT ACCEPTED FOR WORK CARRIED OUT BY OTHER THIRD PARTIES. EQUIPMENT MUST ONLY BE CONNECTED TO MULTITONE SPECIFIED CHARGING AND DATA FACILITIES. EQUIPMENT PROGRAMMING MUST ONLY BE CARRIED OUT BY MULTITONE AUTHORISED PERSONNEL, USING THE RECOMMENDED APPARATUS.
Page 10 RPR 550IS Series INTENTIONALLY BLANK Page (viii) TM1188 Issue 1 AL2 (Oct. 98)
Page 11 RPR 550IS Series SECTION 1 INTRODUCTION AND SPECIFICATION CONTENTS: INTRODUCTION STANDARD FEATURES OPTIONAL FEATURES SPECIFICATIONS RPR 551IS Receiver Performance RPR 552IS Receiver Performance RPR 553IS Receiver Performance Power Supply Code Format Display, Controls and Alerts Memory Beep Code Alpha Operational Environment...
Page 12 The Radio Paging Receiver (RPR) 550 Intrinsically Safe (IS) Series consists of RPR 551IS, RPR 552IS and RPR 553IS pagers. They are small, well constructed, easy to operate and respond to Multitone Mk7 radio paging transmissions in the HF, VHF and UHF bands respectively.
Page 13 4: 35.0MHz to 38.999MHz 5: 39.0MHz to 43.499MHz 6: 43.5MHz to 48.499MHz 7: 48.5MHz to 54.000MHz c) Channel Spacing: 10/12.5kHz or 20/25kHz d) Sensitivity: Table 1: RPR 551IS Sensitivity Figures TYPICAL MEASUREMENT 8 POSITION MODE BEST POSITION AVERAGE On Body 15µVm...
Page 14 RPR 550IS Series e) Adjacent Channel Selectivity: 65dB at 20/25kHz 55dB at 12.5kHz 45dB at 10kHz f) Image Response: 15dB g) Spurious Response: 50dB #2nW h) Spurious Emissions to 1GHz: Intermodulation Response: 55dB (2+4, 4+8 channel separation) k) Co-channel rejection: -5dB NOTE: The figures quoted in (d) to (k) are typical for the frequency range 25MHz to...
Page 15 RPR 550IS Series Intermodulation Response: 60dB (2+4, 4+8 channel separation) k) Co-channel rejection: -5dB NOTE: The figures quoted in (d) to (k) are typical for the frequency range 138MHz to 174MHz and assume an ambient temperature in the range 18EC to 25EC. RPR 553IS Receiver Performance The receiver performance is as follows: a) Frequency Range:...
Page 16 RPR 550IS Series Intermodulation Response: 55dB (2+4, 4+8 channel separation) k) Co-channel rejection: -5dB NOTE: The figures quoted in (d) to (k) are typical for the frequency range 430MHz to 470MHz and assume an ambient temperature in the range 18EC to 25EC. For the RPR 550IS Series the voltage of the pager battery should be above the low battery trigger point.
Page 17 4s with 30s mean speech time User time (e.g. Status/Memory Recall) 20s/hour Code Format The code format is Manchester Encoded Multitone Mk7 Radio Paging Code. Display, Controls and Alerts The display, controls and alerts are as follows: a) Liquid Crystal Display:...
Page 18 RPR 550IS Series d) Audible Alert, Full Volume (typical): 80dB SPL @ 30cm e) Audible Alert* (escalating option): Stage 1: 4 seconds of LED and vibrate. Stage 2: seconds volume beep patterns (70dB to 75dB SPL typical) at 2.7kHz, with LED and vibrate. Stage 3: 8, 16, 32 seconds or continuous full volume...
Page 19 RPR 550IS Series Operational Environment The operational environment is as follows: a) Temperature: -10EC to +55EC b) Humidity: 90% RH (Non-Condensing) c) Storage Temperature: -20EC to +70EC NOTE: There may be some degradation of display performance below 0EC. Dimensions The dimensions are as follows: a) Width: 56mm (2.2ins) b) Length:...
Page 20 RPR 550IS Series INTENTIONALLY BLANK Page 1 - 10 TM1188 Issue 1...
Page 21 RPR 550IS Series SECTION 2 OPERATING INSTRUCTIONS CONTENTS: 1. INTRODUCTION 2. CONTROLS AND INDICATORS 3. WEARING THE PAGER OPERATION OF PAGER 4. Switching On 7. Display Mode 8. Status Information 9. Receiving a Paging Call 11. New Status 12. Cancelling Alerts 13.
Page 22 RPR 550IS Series TABLES Page Status Messages Beep Alert Patterns and Beep Codes FIGURES Controls and Indicators Switch-on Sequence Display Representation of Call Battery Removal and Replacement 2-13 ANNEXE ENGINEERING MODE INTRODUCTION Section 2 describes the operation of the RPR 550IS Series of pagers consisting of RPR 551IS, RPR 552IS and RPR 553IS.
Page 23 RPR 550IS Series DISPLAY ALERT LED MUTE BUTTON OFF BUTTON ON/CANCEL/ MEMORY RECALL BUTTON PSG/10431/1 Figure 1: Controls and Indicators WEARING THE PAGER 3. The pager is supplied with a detachable Griptite clip which is specially designed to ensure tight fitting for `in pocket' or `on belt' application. Tighten the clip by moving the clip slider towards the top of the pager.
Page 24 RPR 550IS Series NOTE: If Permanent On has been incorporated, switching on is not necessary but the pager resets and gives a short beep (deleting any stored messages) each time Off is pressed. SECONDS TONE VIBRATE SEGMENTS ADDRESS SWITCH-ON MESSAGE Figure 2: Switch-on Sequence Display Mode 7.
Page 25 RPR 550IS Series Table 1: Status Messages Description Format Priority When Used x new New message there are x message(s) with new message(s) status (x = 1 to 5) Out-of-Range out of range option is enabled and no in-range signal been received for 3.5 minutes low battery...
Page 26 RPR 550IS Series M1 CALL 123 PSG/10433/1 Figure 3: Display Representation of Call New Status 11. Each call is automatically given new status when first received. New status is removed by cancelling the alert or reviewing the call from memory. If the alert is left uncancelled then ` x new messages ' appears on the display showing the number of messages with new status (x corresponds from 1 to 5).
Page 27 RPR 550IS Series Table 2: Beep Alert Patterns and Beep Codes MULTITONE PIP/BEEP TONE ALERT PATTERN BEEP CODE Single Beep Double Beep Triple Beep Continuous Beep Single Pip Double Pip Triple Pip Continuous Pip Silent Alert NOTE: * The escalating alert and the Mute mode are overridden by beep code five (triple pip) and beep code eight (continuous pip).
Page 28 22. If there are no messages or speech associated with a call the display shows ` tone call n ' for the duration of the alert (n is the Multitone beep code number 1-8). The display behaves identically as it would during a message call.
Page 29 RPR 550IS Series Receiving Another Call Before the Previous Alert Has Finished 24. If a call is being shown on the display when another call arrives, the first call is placed into memory (before viewing is complete) for later retrieval and the new alert proceeds. Calls being reviewed from the memory are also displaced from the display by new alerts.
Page 30 RPR 550IS Series OPTIONS AND FEATURES 31. Some of the facilities on the pager have a number of options so that individual user requirements can be met. Options can be programmed at the time of purchase or at a later date. Display Reversal 32.
Page 31 RPR 550IS Series If low battery and/or Mute are present when Time-of-Day is displayed, they are shown in abbreviated form at either end of the display. M 5:58 Bat b) On-demand Display Mode Press Cancel during the display quiescent condition, when no calls are being received or displayed, to select status interrogation from where Time-of-Day (if enabled) can be seen.
Page 32 RPR 550IS Series System Size Example of Display 10,000 RNo. 01234 10,000 RNo. 1234 1,000 RNo. 234 RNo. 34 Group Call 40. The pager may operate as part of a group of up to either 10 or 100 users. This is achieved using a second address.
Page 33 RPR 550IS Series Low Battery Condition 45. The low battery indication is triggered when the battery voltage drops below a predetermined level, nominally 1.25V. Visual and audible warnings are given. 46. When the pager is switched on it produces a buzz if the battery is low. The visual warning depends upon which display option has been selected.
Page 34 RPR 550IS Series ABSENCE RACK REGISTRATION AND CHARGING WARNINGS WHEN CHARGING IS ENABLED, ONLY PAGERS WITH RECHARGEABLE BATTERIES SHOULD BE INSERTED INTO THE ABSENCE/CHARGING RACK. BATTERY CHANGING OR RECHARGING IS ONLY TO BE UNDERTAKEN IN NON-HAZARDOUS AREAS. ONLY ABSENCE AND CHARGING RACKS A3RO AND A3RP ARE TO BE USED WITH RPR 550IS PAGERS.
Page 35 RPR 550IS Series 52. Remove the pager from the rack by pressing the pager clip and withdrawing the pager. The LED extinguishes and the pager goes through the switch-on sequence before reverting to its normal operational mode. 53. If the pager is inserted into a rack that has charging disabled (i.e. absence operation only) and the pager battery goes flat then the pager may not register as absent.
Page 36 RPR 550IS Series INTENTIONALLY BLANK Page 2 - 16 TM1188 Issue 1...
Page 37 RPR 550IS Series ANNEXE A TO SECTION 2 ENGINEERING MODE CONTENTS: 1. INTRODUCTION 2. ENGINEERING STATES 4. Engineering Mode Characters TABLES Page 1. Engineering States 2A-2 2. Conversion of HEX to Binary 2A-3 3. Programmed Options - EMC Bit Allocation 2A-4 4.
Page 38 RPR 550IS Series Table 1: Engineering States ENGINEERING DESCRIPTION STATE Bytes 0-3 of EEPROM displayed Bytes 4-7 of EEPROM displayed Bytes 8-B of EEPROM displayed Bytes C-F of EEPROM displayed Address displayed Quiet tone Normal tone Out-of-range buzz Vibrate Speech channel open All segments displayed Engineering Mode Characters 4.
Page 39 RPR 550IS Series Table 2: Conversion of HEX to Binary BINARY 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111 Conversion of the sample engineering mode displays previously shown: 1001 0000 0001 0101 0110 1100 1110...
Page 40 HEX DIGIT FUNCTION Fixed Fixed Fixed Fixed LANGUAGE France Germany Holland Portugal Italy Spain SELECTION 0000 0010 0100 0110 1000 1010 1100 FIXED BITS Example 0000 Fixed Display Mode Alert Duration Test Mode Extended Alert Alert Start Point Fixed Speech Speech Time-out Cont.
Page 41 Beep Code for Beep Code Alpha Slot 1 Beep Code for Beep Code Alpha Slot 4 Beep Code for Beep Code Alpha Slot 3 Time Stamp Time-of-Day Fixed (for message) Enable Dis- Enable Dis- able able 0011 1000 0101 Fixed Mk7 System Fixed Fixed...
Page 42 Mute mode Enabled Permanent On Disabled Beep code alpha - slot 1 0011 (Multitone beep code 3) Beep code alpha - slot 2 0100 (Multitone beep code 4) Beep code alpha - slot 3 0101 (Multitone beep code 5) Beep code alpha - slot 4...
Page 43 RPR 550IS Series SECTION 3 TECHNICAL DESCRIPTION CONTENTS: INTRODUCTION PHYSICAL CHARACTERISTICS FUNCTIONAL DESCRIPTION Signal Processing RPR 551IS RADIO BOARD (FRONT END) Antenna RF Amplifier Local Oscillator Mixer RPR 552IS RADIO BOARD (FRONT END) Antenna RF Amplifier SAW Filter Local Oscillator...
Page 44 RPR 551IS Hardware Components RPR 552IS/553IS Hardware Components Overall Block Diagram RPR 551IS Radio Board (Front End) Functional Block Diagram RPR 552IS Radio Board (Front End) Functional Block Diagram RPR 553IS Radio Board (Front End) Functional Block Diagram Main Board Functional Block Diagram...
Page 45 The RPR 550IS Series technical description describes conditions which are common to all three types of the pager (RPR 551IS, RPR 552IS and RPR 553IS). When the description is only applicable to a particular pager then that pager is referred to by name.
Page 46 RPR 550IS Series PSG/10436/1 Figure 1: RPR 551IS Hardware Components PSG/10437/1 Figure 2: RPR 552IS/553IS Hardware Components Page 3 - 4 TM1188 Issue 1...
Page 47 RPR 550IS Series FUNCTIONAL DESCRIPTION Figure 3 shows the block diagram of the functional areas of the RPR 550IS Series. Full circuit diagrams for the radio and main board of each type of pager appear in Section 7. Signal Processing The RF signal is detected by the antenna and fed to a single conversion superheterodyne receiver where the RF is converted into IF and subsequently demodulated into audio and data.
Page 48 RPR 550IS Series RPR 551IS RADIO BOARD (FRONT END) Figure 4 shows the functional block diagram of the RPR 551IS radio board (front end). IF SIGNAL TO MIXER AMPLIFIER MAIN BOARD TR103 RF SIGNAL FROM TR101 ANTENNA ON MAIN BOARD...
Page 49 RPR 550IS Series Mixer The signal frequency is fed to the base of mixer TR103, via the matching network L101, C104 and C105, where it combines with the local oscillator output to produce a difference frequency of 455kHz across R105. The IF signal then passes, via SK101 pin 3, to the first 455kHz IF filter, on the main board.
Page 50 RPR 550IS Series Local Oscillator Transistor TR203 and associated components form the third overtone Colpitts crystal oscillator, with XL201 being the resonant quartz element. The oscillator is trimmed to the correct frequency by C209. The collector of TR203 is tuned to the third harmonic of the oscillator by L204 and C212.
Page 51 RPR 550IS Series RF Amplifier 23. The two-stage RF amplifier has the main effect in achieving the sensitivity of the receiver. The signal passes to TR301 and TR302 before being fed to the Surface Acoustic Wave (SAW) filter via C307. Capacitor C305 and L304 match TR301 to TR302.
Page 52 RPR 550IS Series RPR 550IS MAIN BOARD The main board, shown in block diagram form in Figure 7, contains the following: a) IF, Detector and Speech circuits b) Decoding circuits c) LCD and Alert generation drive circuits d) Function control switches e) Power supply circuits INCOMING IF FROM FRONT INCOMING IF FROM FRONT...
Page 53 RPR 550IS Series IF Amplifier, Filters and Discriminator The 455kHz IF signal passes from the radio board to PL1 pin 3 and then to the first 455kHz bandpass filter FL1. The filtered signal enters IC1 via pin 1, where it is amplified before passing to the second 455kHz filter FL2, via pin 4 and C13.
Page 54 The decoder circuit comprises gate array IC2, microprocessor IC3, EEPROM IC4 and associated components. Gate array IC2 tracks and samples incoming data from the receiver. Multitone Mk7 data then passes to the microprocessor. The interrupt signal, reset, LED drive and tone waveforms are all generated by the gate array.
Page 55 RPR 550IS Series Decoder Operation The radio receiving circuits are activated for a brief period once a second by that IC2 can check for the presence of the Mk7 preamble signal (256Hz square wave). If preamble is detected, the radio receiving circuits remain powered on and IC2 is used to acquire batch synchronisation.
Page 56 R1B to the vibrate driver from the rest of the circuitry. R1A is fitted to the RPR 552IS/553IS and R1B is fitted to the RPR 551IS. Liquid Crystal Display Module The Liquid Crystal Display (LCD) module consists of a driver chip, a liquid crystal display and five resistors forming a bias chain.
Page 57 RPR 550IS Series POWER SUPPLIES There are four infallibly power limited supplies on the main board. They are: a) BEPB+, limited by R16 provides power to the beep drive. b) B+, limited by R61 provides power to the speaker driver. c) B+, limited by R1A or R1B provides power to the vibrate driver.
Page 58 RPR 550IS Series LCD 5V Power Supply When the display module is to be enabled, microprocessor IC3 generates a low signal from pin 11 enabling TR19b via R73. Transistors TR4 and TR22 subsequently conduct. A self-oscillating converter is formed by TR22 and L4. On negative cycles C39 charges via D10b.
Page 59 RPR 550IS Series ANNEXE A TO SECTION 3 MULTITONE Mk7 DIGITAL FORMAT CONTENTS: INTRODUCTION MODULATION CODE FORMAT General Preamble System Transmissions Batch Structure Codeword Structure Types of Codeword FIXED POSITION CODEWORDS Syncword System/Time Codeword Dateword In-Range IDLE, ADDRESS AND MESSAGE CODEWORDS...
Page 60 Figure 1: Example of Manchester Bitstream CODE FORMAT General The Multitone Mk7 format consists of a Preamble followed by a number of system transmissions (see Figure 2). Preamble Each paging call transmission starts with a Preamble to enable paging receivers to attain bit synchronisation, before acquiring word and batch synchronisation from the syncword.
Page 61 RPR 550IS Series System Transmissions A system transmission consists of a number of complete batches, all belonging to one system. There is no constraint on the number of batches within a system transmission. Figure 2: Mk7 Code Format Up to four independent system addresses may be accommodated within the Mk7 signal code.
Page 62 RPR 550IS Series Codeword Structure Each codeword has 32 bits, comprising: a) Bits 1 to 21 Information Bits. b) Bits 22 to 31 Error check bits following the Bose-Chaudhuri-Hocquenhen (BCH) method. c) Bit 32 Parity Bit. Gives an even bit parity check of the whole codeword.
Page 63 RPR 550IS Series System/Time Codeword The System/Time codeword is the second codeword in the batch (Position 1). Its purpose is to identify the system (0 - 3) and broadcast the Time-of-Day signal (see Figure 4). Midnight is always transmitted as 24:00:00 to avoid the possibility of an all-zeroes codeword.
Page 64 RPR 550IS Series BIT No. 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 DATA 0 D1 D0 d3 d2 d1 d0 M1 M0 m3 m2 m1 m0 Y3 Y2 Y1 Y0 y3 y2 y1 y0 DATEWORD (UK/EUROPE) BIT No.
Page 65 RPR 550IS Series BIT No. 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 DATA NOTE: Check bits 22-31 and Parity bit 32 are not shown. Figure 7: Idleword Structure Address Codeword The Address Codeword identifies Beep Code, message wait, and address value.
Page 66 RPR 550IS Series Table 1: Beep Code Patterns MULTITONE CODE TYPE PATTERN BEEP CODE SINGLE BEEP DOUBLE BEEP TRIPLE BEEP NORMAL CONTINUOUS BEEP SINGLE PIP DOUBLE PIP TRIPLE PIP OVERRIDE CONTINUOUS PIP Message Codeword The Message codeword, in ASCII+ format, has a four-bit header which identifies the message type.
Page 67 RPR 550IS Series Some paging sites have multiple encoder channels controlling sequential transmitters. If a paging receiver is located mid-way between two transmitters it may receive the same call twice. To assist the paging receiver's call comparator in determining whether the second call is the same call or a new call, a Message Stamp codeword may be inserted before the message.
Page 68 RPR 550IS Series Assuming a pager address of 11500 (1 is the system number and 1500 is the pager number) the second address for groups of 10 is constructed as follows: a) Pager Address 11500 b) Ignore the first and last digits c) Add 10 in front of number 10150 (second address) The group of 10 consists of receivers 1500 to 1509.
Page 69 RPR 550IS Series SECTION 4 INSTALLATION AND COMMISSIONING Any relevant information, on the installation and commissioning procedures for the RPR 550IS Series of pagers, is contained within Section 2 of this manual. TM1188 Issue 1 Page 4 - 1...
Page 70 RPR 550IS Series INTENTIONALLY BLANK Page 4 - 2 TM1188 Issue 1...
Page 71: Table Of Contents
21. Receiver Sensitivity Measurement (Coarse) 22. Receiver Sensitivity Measurement (Fine) 24. PROGRAMMING THE PAGER TABLES Page 1. RPR 551IS Radio Board DC Voltage Levels 5-16 2. RPR 552IS Radio Board DC Voltage Levels 5-16 3. RPR 553IS Radio Board DC Voltage Levels 5-16 4.
Page 72 RPR 550IS Series FIGURES Page 1. Clip Removal 2. Case Removal 3. Exploded View 4. Fault-Finding Guide 5-10 4. Fault-Finding Guide (Continued) 5-11 4. Fault-Finding Guide (Continued) 5-12 4. Fault-Finding Guide (Continued) 5-13 4. Fault-Finding Guide (Continued) 5-14 4. Fault-Finding Guide (Continued) 5-15 5.
Page 73: Routine Maintenance
Important MAINTENANCE AND REPAIRS TO THIS EQUIPMENT MAY ONLY BE CARRIED OUT BY MULTITONE AUTHORISED PERSONNEL. LIABILITY IS NOT ACCEPTED FOR WORK CARRIED OUT BY OTHER THIRD PARTIES. 2. Repairs are only to be performed by qualified personnel in authorised workshops.
Page 74: Test Equipment, Tools And Ancillaries
RPR 550IS Series TEST EQUIPMENT, TOOLS AND ANCILLARIES Test Equipment 7. The following test equipment is required: & IBM PC or equivalent & P648 Programming Unit & P648H Programming Software, RPR 550 Series & P910/911 Cable Assembly, Computer to P645 &...
Page 75: Servicing
RPR 550IS Series & Trimming Tools (RPR 551IS), Tip Sizes 0.4 x 0.9mm (L101), 0.4 x 1.8mm (C121, L2) & Trimming Tools (RPR 552IS), Tip Sizes 0.4 x 1.8mm (C202, C209, C212, RV1, L2) & Trimming Tools (RPR 553IS), Tip Sizes 0.4 x 1.8mm (C314, C327, RV1, L2) &...
Page 76: Case Removal
Using a 2.5mm crosspoint screwdriver, remove the crosspoint screw from the radio board. For RPR 551IS, gently prise the radio and main board apart using the RF board extraction tool, taking care not to damage the pins of the connecting plugs.
Page 77 RPR 550IS Series PSG/10444/1 Figure 2: Case Removal TM1188 Issue 1 Page 5 - 7...
Page 78: Re-Assembly
Swivel it around until it locates in the correct position. Ensure that the contact fingers at the end of the decoder board are not disturbed and that the link wires are correctly located. RPR 551IS RPR 552IS/553IS PSG/10445/1...
Page 79: Power Supply Voltage Adjustment
RPR 550IS Series c) Place on an anti-static mat, connect 1.3V DC and switch on. d) With a x10 probe connected to the oscilloscope measure points 1 to 13 in Table 5 and compare the resultant waveforms with those in Figure 5. Power Supply Voltage Adjustment 16.
Page 80 RPR 550IS Series SUSPECT PAGER FIT NEW BATTERY. SWITCH ON IS DISPLAY CORRECT? IS DISPLAY FLASHING BLANK OR FLASHING? BLANK CORRUPTED EEPROM. RE-PROGRAMME IS LED IS LED CORRECT? CORRECT? IS BEEP IS BEEP IS BEEP IS BEEP CORRECT? CORRECT? CORRECT? CORRECT? DECASE AND DECASE AND...
Page 81 TR13, IC1 PIN 16 FL1, IC1 * -70dBm CHANNEL FREQUENCY 1kHz MODULATION FAULTY RADIO 1.5/3kHz DEVIATION BOARD GO TO: C FOR RPR 551IS D FOR RPR 552IS E FOR RPR 553IS Figure 4: Fault-Finding Guide (Continued) TM1188 Issue 1 Page 5 - 11...
Page 82 RPR 550IS Series C (RPR 551IS RADIO BOARD) PLACE THE MAIN BOARD ON THE P637, POSITION B, AND CONNECT IT TO THE RADIO BOARD VIA THE 4-WAY EXTENSION LEAD. FIT A BATTERY. POWER UP THE RADIO BOARD BY CONNECTING A LINK BETWEEN PINS 1...
Page 83 RPR 550IS Series IS THERE A 30mV p-p SIGNAL AT 2x XTAL FREQUENCY? CONNECT A SCOPE WITH A x10 PROBE TO THE EMITTER OF TR102. IS THERE ≈700mV p-p AT THE XTAL FREQUENCY? LOCAL OSCILLATOR STOPPED. CHECK BIASING OF TR102 (XL101, C115, C116, R108, R107, R109, TR102) LOCAL OSCILLATOR...
Page 84 RPR 550IS Series D (RPR 552IS RADIO BOARD) PLACE THE MAIN BOARD ON THE P637, POSITION B, AND CONNECT IT TO THE RADIO BOARD VIA THE 4-WAY EXTENSION LEAD. FIT A BATTERY. POWER UP THE RADIO BOARD BY CONNECTING A LINK BETWEEN PINS 1 AND 4 ON SK2 CHECK: ARE DC LEVELS...
Page 85 RPR 550IS Series E (RPR 553IS RADIO BOARD) PLACE THE MAIN BOARD ON THE P637, POSITION B, AND CONNECT IT TO THE RADIO BOARD VIA THE 4-WAY EXTENSION LEAD. FIT A BATTERY. POWER UP THE RADIO BOARD BY CONNECTING A LINK BETWEEN PINS 1 AND 4 ON SK2 CHECK: ARE DC LEVELS...
Page 86 RPR 550IS Series Table 1: RPR 551IS Radio Board DC Voltage Levels COMPONENT COLLECTOR BASE EMITTER REMARKS TR101 0.98 0.94 0.22 RF amplifier TR102 0.96 0.92 0.21 Oscillator TR103 0.88 0.68 Mixer XL101 0.92 Local oscillator crystal NOTE: The voltages listed above were measured with a battery terminal voltage of 1.3V, the 1V line at 1.05V and SK2 pin 4 connected to common.
Page 87 RPR 550IS Series Table 4: RPR 550IS Main Board Decoder Circuit DC Voltage Levels COMPONENT COLLECTOR BASE EMITTER REMARKS 1.27 1.27 Audio power amp 1.30 " 1.17 0.54 1.18 Switched battery 0.02 2 oscillator feedback TR5a 0.73 (4) 0.71 (2) 1.18 (3) regulator circuit TR5b...
Page 88 RPR 550IS Series Table 4: RPR 550IS Main Board Decoder Circuit DC Voltage Levels COMPONENT COLLECTOR BASE EMITTER REMARKS TR21a 2 regulation TR21b 1.25 (2) " TR22 0.87 1.21 2 oscillator TR23 1.49 Rack switch on TR24 1.24 1.24 Beep enable amp TR25a 1.49 (4) Charger pager...
Page 89 RPR 550IS Series Table 5: Decoder Circuit Detailed Test Sequence STEP TEST POINT REMARKS 1.3V DC IC2 pins 31,71 2.7 - 3.3V DC IC3 pin 39 2.7 - 3.3V DC IC2 pins 10,51 1.5V IC2 pin 3 Gate array clock crystal 32.768kHz IC2 pin 5 RESB 0 - 3V on switch on...
Page 90 RPR 550IS Series f = 32kHz IC2 PIN 3 (CLK) (XL3) IC3 PIN 33 (SCK) (INTERRUPT) 140µs IC2 PIN 68 (TMI) 100µs IC3 PIN 22 (XL4) ≈8.4ms 125ms IC2 PIN 26 WHEN MUTE IS PRESSED 200µs IC2 PIN 9 (BEC) 30ms NOTE: 1.
Page 91 RPR 550IS Series DISPLAY SCREEN LAMP LCD1 BOARD MAIN BOARD PSG/10447/1 Figure 6: Display Connections Between LCD and Main Board Table 6: Display Connections LCD1 REMARKS IC-2 ON icon oscillator (from TR18) IC-1 ON icon oscillator (from TR18) 4.75V nominal Not connected TM1188 Issue 1 Page 5 - 21...
Page 92 RPR 550IS Series µP D65026 PSG/10448/1 Figure 7: IC2, Gate Array Pin Configuration Table 7: IC2, Gate Array Pin Connections NAME DESCRIPTION OSEN Oscillator cell enable Clock input: 512 baud = 32.768kHz, 1200 baud = 38.400kHz RESB Reset input: 0 = reset Data input Radio enable: 0 = radio on, 1 = radio off Low voltage supply rail (0.9V - 1.5V)
Page 93 RPR 550IS Series Table 7: IC2, Gate Array Pin Connections NAME DESCRIPTION Data transfer clock: = data transfer Read/Write: 0 = write to chip, 1 = read from chip Register select: 0 = data register, 1 = address/status Ground µP supply rail Tri-state bi-directional buffer: bi-directional data bus DA3 = most significant bit DA0 = least significant bit...
Page 94 RPR 550IS Series Table 7: IC2, Gate Array Pin Connections NAME DESCRIPTION Ground Ground NOTE: Z = high impedance output. = falling edge of output signal. PSG/10449/1 Figure 8: IC3, Microprocessor Pin Configuration Page 5 - 24 TM1188 Issue 1...
Page 95 RPR 550IS Series Table 8: IC3, Microprocessor Pin Connections NAME DESCRIPTION To switch outputs on IC2, the gate array Bi-directional data bus Speech enable SBY (display enable) Display V enable Display DB7 Display DB6 Display DB5 Display DB4 Ground Ground RESET Reset Oscillator circuit...
Page 96 RPR 550IS Series Table 8: IC3, Microprocessor Pin Connections NAME DESCRIPTION P13/TI0 To SCK (Sample Clock) on IC2 INT1/P11 To switch and timer interrupts on IC2 INT0/P10 To sync word detect on IC2 Display RS O/P Display E O/P Battery Low I/P TEST PSG/10429/1 Figure 9: IC4, EEPROM Pin Configuration...
Page 97 RPR 550IS Series IF1 IN DE-COUPLE PNP base DE-COUPLE 1V POT IF1 OUT IF2 IN DATA OUT DE-COUPLE DATA IN DE-COUPLE DISCRIMINATOR OUT QUADRATURE LC IN NC = NOT CONNECTED PSG/10427/1 Figure 11: IC1 Pin Configuration BAV 99 BAT 74 PSG/10426/1 Figure 12: Diode Lead Details TM1188 Issue 1...
Page 98 RPR 550IS Series VOUT PSG/10425/1 Figure 13: IC7 Pin Configuration ALIGNMENT PROCEDURE RPR 550IS SERIES 1kHz SINAD/AC SIGNAL mV METER GENERATOR P637 AUDIO OUT RF IN OSCILLO- SCOPE 10dB P637F ATTENUATOR PSG/10424/1 Figure 14: Alignment Procedure Test Equipment Layout 20. To carry out the alignment procedure configure the equipment as shown in Figure 14. If the meter has a speaker facility ensure that the speaker is switched on.
Page 99 Fit a dummy case front (see Figure 16) and connect the lead from the SINAD meter to SK2. For RPR 551IS - Adjust C121 for 12dB SINAD with minimum input signal. For RPR 552IS - Adjust C202 for 12dB SINAD with minimum input signal.
Page 100 RPR 550IS Series C121 L101 C314 RF IN RF IN RF IN C202 C212 C327 C209 PSG/10423/1 SK2 TEST SK2 TEST SK2 TEST SOCKET SOCKET SOCKET Figure 15: Tuning Points PSG/10422/1 Figure 16: Dummy Case Front (RPR 550IS Series) Page 5 - 30 TM1188 Issue 1...
Page 101 2 calls in five. f) Increase the level in 1dB steps until five consecutive calls are received. An output level should be achieved of -90dBm (RPR 551IS/552IS) or -92dBm (RPR 553IS). NOTES: 1. This is only an indication of sensitivity.
Page 102 (up/down with transitions). Place the pager in the polystyrene block (see Figure 18), positioned centrally in the TEM Cell with the clip facing the input end of the cell. A level of -90dBm (RPR 551IS), -92dBm (RPR 552IS) or -93dBm (RPR 553IS) should be achieved.
Page 103 RPR 550IS Series PSG/10039 Figure 18: Polystyrene Foam Block Dimensions (in mm) TM1188 Issue 1 Page 5 - 33...
Page 104 SW BATT TR12b DATA OUT TR12a TR29 REGULATOR CONTROL PL1-3 PART OF IC1 TR11a TR31b TR11b TR31a SK2-2 AUDIO TEST SPEAKER TR10b TR10a PRE AMP SPEECHEN...
Page 105 PL1-1,2 PL1-4 RADIO BOARD SWITCHED BATTERY DATA AMP TR27 SK2 (TEST) TR28 PART OF IC1 DATA SK1-2 AUDIO PRE AMP LINK Y OR Z SK1-1 AUDIO BATT...
Page 106 CIRCUITRY TR16 BATTERY CHARGE IC 2 CIRCUIT IC 3 CHARGE IC 4 CONTACT "ON" ICON DRIVER (TR18) LED DRIVER TR5b IC2p17 IC2 p55 OFF CIRCUIT TR5a RESB TR14b TR14a IC2 p5 SWITCH IC2 p53 ON/CANCEL SWITCHING ON FROM OFF IC2 p53 TR25a SELF SWITCH ON FITTING BATTERY...
Page 107 VIB CONTACT R1A/R1B RESB IC2 p5 TR26 TR25b R100 CHARGE CONTACT VIBRATE DRIVE CCTRY IC2 p15 TR22 D10b DISPLAY V D10a TR19b IC3p11 TR19a TR21b TR21a DISPLAY 5V SUPPLY...
Page 108 AUDIO SK2-2 AUDIO TEST BEEP SPEAKER TR10b TR10a PRE AMP TR15a TR15b SPEECHEN...
Page 109: Spare Parts List
9. Diodes 10. Filters 11. Inductors 12. Integrated Circuits 13. Resistors 14. Switches 15. Transistors 16. Channel Dependent Components RPR 551IS RADIO BOARD COMPONENTS 17. General 18. Capacitors 19. Connectors 20. Crystal 21. Inductors 22. Resistors 23. Transistors RPR 551IS BANDED COMPONENTS 24.
Page 110 RPR 550IS Series CONTENTS: (Continued) RPR 552IS RADIO BOARD COMPONENTS 31. General 32. Capacitors 33. Connector 34. Crystal 35. Filter 36. Inductors 37. Resistors 38. Transistors RPR 552IS BANDED COMPONENTS 39. Band 1 40. Band 2 41. Band 3 RPR 553IS RADIO BOARD COMPONENTS 42.
Page 111 21450 PAD SPEAKER RETAINING 1861-2539 BATTERY DOOR 0860-9736 PLATE BLANKING (REPLACES CLIP ASSY) 0860-9789 3. LABELS - MULTITONE STANDARD LABEL CLIP RPR550IS 2061-2431 LABEL APPROVAL 2061-2421 LABEL REAR RPR 550IS 2061-2445 * COMPONENTS MARKED WITH AN ASTERISK ARE ESSENTIAL FOR INTRINSIC SAFETY AND THEIR SPECIFICATIONS MUST NOT BE CHANGED WITHOUT REFERENCE TO BASEEFA.
Page 112: General
RPR 550IS Series ITEM/CIRCUIT DESCRIPTION PART NO. REFERENCE 3. LABELS - MULTITONE STANDARD (Continued) LABEL WARNING (UNDER CLIP) 2061-2522 LABEL DATA 2060-7228 LABEL SERIAL 16300X17 LABEL CE LOGO (BLACK) 2061-3733 LABEL CE LOGO (GREY) 2061-3457 RPR 551IS LABEL CASE FRONT APPROVAL (T4)
Page 113: Capacitors
CAP CHIP TANT 10µ 10% 6.3V 3325-0001 C34,55,48 CAP CHIP 220p 5% 50V 3326-0031 7. Connectors PLUG MODULAR 4-WAY 4322-0007 PLUG MODULAR 2-WAY (RPR 551IS ONLY) 4322-0006 SOCKET LOWPROF 2-WAY 4444-0001 CONNECTOR MODULAR SKT 4-WAY 4443-0004 8. Crystals XTAL CLOCK 32.768kHz...
Page 114 RPR 550IS Series ITEM/CIRCUIT DESCRIPTION PART NO. REFERENCE 9. Diodes D2,6,7,10 DIODE CHIP BAT 74 3710-0002 LED RED 3704-0020 D8,11,14,19 DIODE SCHOTTKY RECT 3703-0046 DIODE SWITCHING 3703-0047 D4*,5* DIODE ZENER 3712-0025 D9*,13*,15*,16*,17*,18* DIODE ZENER 3712-0024 10. Filters (10/12.5kHz) MIN. CERAMIC FILTER 455kHz CFUM455F 4010-0004 (10/12.5kHz) MIN.
Page 115 3115-0026 RES CHIP 330k 5% 0.0625W 3115-0134 RES CHIP 1k0 5% 0.0625W 3115-0074 NOTE: R1A IS FITTED TO RPR 552/553IS. R1B IS FITTED TO RPR 551IS. 14. Switches SWITCH (ON/CANCEL) 4202-0011 SWITCH, PUSH BUTTON (OFF) 4202-0013 SWITCH, PUSH BUTTON (MUTE) 4202-0006 15.
Page 116: Crystal
25kHz Channel Spacing R23 (551, 552, 553) RES CHIP 27k 5% 0.0625W 3115-0108 R91 (551, 552, 553) RES CHIP 150k 5% 0.0625W 3115-0126 RPR 551IS RADIO BOARD COMPONENTS 17. General CAN RADIO SCREEN 1261-0256 SLEEVE XL101 7803-0001 18. Capacitors C103,107,113,118...
Page 117: Inductors
RES CHIP 150R 5% 0.0625W 3105-0151 23. Transistors TR101 TRANSISTOR NE 02133-D 3605-0002 TR102,103 TRANSISTOR BFS17 3602-0001 RPR 551IS BANDED COMPONENTS 24. Band 1 C101 CAP CHIP 75p 5% 50V 3301-0034 C102 CAP CHIP 270p 5% 50V 3301-0047 C104 CAP CHIP 68p 5% 50V...
Page 118 RPR 550IS Series ITEM/CIRCUIT DESCRIPTION PART NO. REFERENCE Band 3 C101 CAP CHIP 39p 5% 50V 3301-0027 C102 CAP CHIP 150p 5% 50V 3301-0041 C104 CAP CHIP 47p 5% 50V 3301-0029 C105 CAP CHIP 33p 5% 50V 3301-0025 C108 CAP CHIP 5p6 0.25p 50V 3301-0010 C114 CAP CHIP 12p 5% 50V...
Page 119: Rpr 553Is Radio Board Components
RPR 550IS Series ITEM/CIRCUIT DESCRIPTION PART NO. REFERENCE RPR 552IS RADIO BOARD COMPONENTS 31. General SCREEN CAN INJECTION 1261-0501 ADHESIVE PAD XL201 1860-8096 32. Capacitors C201 CAP CHIP 10p 0.25p 50V 3301-0013 C202 CAP TRIM 3-10p 3502-0025 C205,207,213,216 CAP CHIP 1n 10% 50V 3301-0100 C206,208,214,217 CAP CHIP 1µ0 +80/-20% 16V...
Page 120 RPR 550IS Series ITEM/CIRCUIT DESCRIPTION PART NO. REFERENCE 37. Resistors R201 RES CHIP 4k7 5% 0.0625W 3105-0187 R202,205 RES CHIP 680R 5% 0.0625W 3105-0167 R203,207 RES CHIP 100R 5% 0.0625W 3105-0147 R204 RES CHIP 1k 5% 0.0625W 3105-0171 R208 RES CHIP 33k 5% 0.0625W 3105-0207 R209 RES CHIP 1k5 5% 0.0625W...
Page 121: Filter
RPR 550IS Series ITEM/CIRCUIT DESCRIPTION PART NO. REFERENCE RPR 553IS RADIO BOARD COMPONENTS 42. General CAN SCREEN IMAGE 1261-0298 SLEEVE XL301 7803-0001 43. Capacitors C302,303,304,305,306,331 CAP CHIP 100p 5% 50V 3301-0037 C307,323 CAP CHIP 12p 5% 50V 3301-0015 C309,315,321 CAP CHIP 1µ0 20% 16V 3306-0020 C310,320,325,330 CAP CHIP 1n 10% 50V...
Page 122: Resistors
RPR 550IS Series ITEM/CIRCUIT DESCRIPTION PART NO. REFERENCE 48. Resistors R301,304 RES CHIP 1k 5% 0.0625W 3105-0171 R302,316 RES CHIP 220R 5% 0.0625W 3105-0155 R305 RES CHIP 10R 5% 0.0625W 3105-0123 R306 RES CHIP 390R 5% 0.0625W 3105-0161 R307 RES CHIP 330R 5% 0.0625W 3105-0159 R308 RES CHIP 1k8 5% 0.0625W...
Page 123 DIAGRAMS CONTENTS: Source Drawing Page RPR 551IS PCB can be identified by the marking “3061-2733 ISS 1” RPR 551IS Radio Board Circuit Diagram 2961-2731 Iss. 1 7-3/4 RPR 551IS Radio Board Component Layout 0261-2732 Iss. 1 - Side 1 (sheet 1 of 2) RPR 551IS Radio Board Component Layout 0261-2732 Iss.
Page 124 RPR 550IS Series CONTENTS: Source Drawing Page RPR 550IS PCB can be identified by the marking “3061-1213” 10. RPR 550IS Main Board Circuit Diagram (Radio) 2961-1212 Iss. 4 7-21/22 (sheet 2 of 5) 11. RPR 550IS Main Board Circuit Diagram (Decoder) 2961-1212 Iss.

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