Lafayette ssb 25 service manual

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23 CHANNEL. AM- 558

FREQUENCY SYNTHESIZED
CB TRANSCEIVER

V/ ..

SERVICE MANUAL
TELSAT $53-25

(99-32377)

LAFAY ETTE

TRANSCEIVER

Page 2

CO NTE NTS

FOREWORD ....................... 1
GENERAL INSTRUCTIONS ............. 1'
GENERAL DESCRIPTION .............. 1
TELSAT SSB~25 TRANSCEIVER
ALIGNMENT PROCEDURE ............. 2
SYNTHESYZER ALIGNMENT ........... 2
01 and 02 OsciIlator Adjustment ........ 2
O3 Oscillator Adjustment ............. 2
Q4 Oscillator Adjustment ............ 2
' 06 and O7 Oscillator Adjustment ........ 3
TRANSMITTER ALIGNMENT ........... 3
RF Power Output Adjustment .......... 3
$55 Transmission Adjustment .......... 3
Driver [012] and Final Stage Adjustment ..... 3
Carrier Balance Adjustment ............. 3
$53 Modulation Adjustment ............ 3
RF Meter Adjustment ................ 3
Range Boost Adjustment On AM
Transmission ..................... 6
TVI Adjustment ................... 5
RECEIVER ADJUSTMENT ............. 6
AM Reception Adjustment ............ 5
Second Local Oscillator [034] Adjustment . . . . 5
RF and IF Alignment ................ 5
858 Reception Adjustment ............ 5
IF Alignment ..................... 6
Sensitivity Check For SSE Reception ....... 5
AGC Alignment ................... 7
S-Meter Alignment .................. 7
Noise Silencer Alignment ............. 7
BLOCK DIAGRAM ................... g
ELECTRONIC PARTS LOCATION,
PRINTED CIRCUIT BOARDS ........... 11
MECHANICAL PARTS LOCATION ........ 13
COMPLETE PARTS LIST ............... 15
SCHEMATIC DIAGRAM ...... (Separate Sheet)

PARTS LOCATION ......... (Separate Sheet)

LIST OF ILLUSTRATIONS

FIGURE

1

10.

Circuit and equipment connections
required to make 588 Modulation

and Transmitter adjustment, .......
SSB Modulation Envelopes ........
Noise Silencer ADJ. TeSt Fixture . . .

Power Supply PC Board Assembly

EPO-538 ...................
AGC PC Board Assembly EPO-539 . . . .

Transmitter/Receiver PC Board

Assembly EPO-534 .............

Front Panel Mechanical Parts

Locations ...................

Main Chassis Component Mechanical

Parts Locations (Top View) .......

Rear Panel Mechanical Parts

Locations ...................

Main Chassis Component Mechanical
Parts Locations (Bottom

View) ......................

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