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Micro System BTB2370/12




TABLE OF CONTENTS
Chapter
Location of PC Boards & Versions Variation .......................... 1
Technical Specifications......................................................... 2
Safety instruction.....................................................................3

Set Block Diagram...................................................................4

Set Wiring Diagram .................................................................5
Disassembly Diagram .............................................................6
Main Board...............................................................................7
Circuit Diagram ................................................................7-1
Layout Diagram................................................................7-5
Display Board............................................................................8
Circuit Diagram................................................................8-1
Layout Diagram ................................................................8-3
Mechanical Exploded View ..................................................... 9
Trouble Shooting....................................................................10
Software Upgrade & Procedure To Restore Product Setting....11
Revision list ............................................................................12



5 Gibson


Gibson
Gibson

3140 038 63130
Published by Xu & Sam wk1526 Subject to modification


Version1.0
1-1
2-1




2. Technical Specification
TEST CONDITIONS:
1.POWER SUPPLY: AC.Accordiing to Ver
2.REF OUTPUT: 830W , Sound effect off
3.FM MONO: 22.5KHz Dev,1KHz MODULATION ,75 IMPEDANCE ,60dBu
4.FM STEREO : MAIN+SUB = 50KHz, PILOT : 10KHz,COMPOSITE: 40.0KHz
FM SECTION
TEST DATA
NO TEST ITEMS UNIT NOM. LIMIT
1# 2#
87.5 87.5 87.5
1 Fvequency Range MHz
108 108 108
88 18 22 9 9
2 26dB QUENTING SENSITIVITY 98 dB 18 22 9 9
107 18 22 10 10
3 -3dB LIMITING POINT 98 dB 20 26 8 9
4 IF REJECTION 98MHZ 98 dB 65 60 >126 >126
5 IMAGE REJECT 98MHZ 107 dB 30 25 >126 >126
6 S/N MONO 65 60 70 68
7 OVERALL DISTERTION % 2 3 0.07 0.08
8 MODULATION HUM 10%THD S/N dB 50 45 60 60
88MHz dBf 28 36 33 32
9 TUNING SENS 98MHz dBf 28 36 33 33
107MHz dBf 28 36 33 33
10 STREO CHANNEL SEPARATION 1KHZ Db 30 26 40 41
11 THD 10% POWER 1KHZ W 30