Unication NP88 POCSAG Manual de Serviço descarregar pdf (Página 31)

1-26 June 21, 2004

GENERAL NP88 FLEX

Maintenance

Removing the Receiver Board

1. Removing the battery, battery cover, and back and front cover according to the

earlier procedures.

2. Hold the decoder board down, grasp the receiver board and gently lift the

receiver board away from the decoder board as shown in Figure 1-15.

Replacing the Receiver B oard

1. Align the interconnect plug on the decoder board with the socket on the receiver

board.

2. Press down on the receiver board until all the pins of the interconnect plug are

fully engaged. The bodies of the plug and socket must be touching.

F igure 1-15.

3. Replace the back and front cover, batter y, and batter y cover accor ding to the

ealier procedur es

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 64 65

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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Unication NP88 POCSAG Manual de Serviço Página 31

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