Unication NP88 POCSAG Wartungshandbuch Seite 6
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June 21,2004 1-1
NP88 FLEX GENERAL
About This Publication
About This Publication
Using t his manual and the many suggestions contained in it assures proper
installation, operation, and maintenance of Unication products and equipment.
Refer any questions about this m anual to the nearest Customer Service Manager.
Audience
This Service Manual is provided to assist service personnel in the test and repair
of Unication NP88 FLEX . Service personnel should be familiar wit h
electronic assembly test methods and troubleshooting and with the operation and
use of associated test equipment.
Finding Information
This manual provides descriptive data and service information for the Unication
NP88 FLEX. A pager’s product family is identified by the first three
digits of the pager serial number, unless the pager is covered by an extended
warranty.Extendedwarrantypagershavetwoalphabeticcharactersin placeofthe
first two digits of the product family code. The first digit following the alphabetic
code indicates the number of years the warranty period is in effect.
Where information is specific to a type of pager, it is indicated, otherwise informa-
tion is pertinent to NP88 FLEX.
Schematicdiagrams, parts lists,and printed-circuitboardlayouts are containedin
supplementary manuals.
This Service Manual consists of three types of major sections.
• General - Describes the product family, its features and options, and theory of
operation. Also provided, are procedures for disassembling, troubleshooting,
and repairing Unication NP88 FLEX.
• Decoder - Provides decoder-specific circuit descriptions and troubleshooting
flowcharts.
• Receiver - By frequency band, provides receiver-specific circuit descriptions,
alignment procedures, and troubleshooting flowcharts.
Conventions
Special characters and typefaces, listed and described below, are used in this
publication to emphasize certain types of information.
Q234
This typeface is used to emphasize circuit board component reference
designators.
cell
This typeface represents text displayed on the pager LCD.
N
Note: Emphasizes additional information pertinent to the subject matter.
G
Caution: Emphasizes information about actions which may result in equipment
damage.
- SERVICE MANUAL 1
- Foreword 2
- Computer Software Copyrights 3
- About This Publication 6
- Revisions 7
- Related Publications 7
- Product Overview 9
- A ddres s ing 10
- Controls and Indic ator 10
- Liquid Crystal Display (LCD) 11
- 7:44a 11-11 12
- 2: 11:45a 12
- Standard Features 13
- Message Features 14
- Duplicate Message Indicator 14
- VIBRA-Page 14
- Operation 14
- Battery Check And Monitor 16
- Reminder Alert 16
- Standard Options 17
- Time and Date Options 17
- Alert Options 18
- − 60-second lockout 19
- − 150-second lockout 19
- − 390-second lockout 19
- FLEX-Specific Options 20
- Automatic Message Formatting 21
- Automatic Reset 21
- Erroneous Data Indication 21
- Out of Range Option 21
- Theory of Operation 22
- General Circuit Description 23
- Receiver 24
- Paging Coding Schemes 25
- Figure 1-9 27
- Removing the Back Cover 28
- Replacing the Back Cover 29
- Figure 1-13 30
- Figure 1-14 30
- Removing the Receiver Board 31
- Replacing the Receiver B oard 31
- F igure 1-16 32
- F igure 1-17 32
- Troubleshooting 33
- Corrective Maintenance 34
- Self-Diagnostic Feature 34
- June 21, 2004 1-31 36
- NP88 FLEX GENERAL 36
- Paging Sensitivity Check 37
- Circuit Checks 39
- ΔI is between 2% and 15% 40
- Backend Filter Measurement 43
- Contents 46
- Model Numbers 47
- Operating Modes 48
- Page Alert/Display Mode 49
- Circuit Description 50
- Alert Circuitry 51
- FLEX Pagers 53
- No Audible Alert 55
- No Vibrator Alert 56
- No Backlighting 57
- NOTE: THIS PAGER DOES NOT 58
- REQUIRE DATA INVERSION, BUT 58
- CAN BE CONFIGURED FOR 58
- INVERSION DUE TO TERMINAL 58
- REQUIREMENTS 58
- June 21, 2004 3-i 60
- NP88 FLEX RECEIVER 61
- Specifications 61
- June 21, 2004 3-1 61
- RECEIVER NP88 FLEX 62
- 3-2 June 21, 2004 62
- NP88 FLEX RECEIVER 63
- June 21, 2004 3-3 63
- 3-4 June 21, 2004 64
- Oscillator Frequencies 65
- June 21, 2004 3-5 65
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