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Micro System BTM2335/all




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
Circuit Diagram ................................................................7-1
Layout Diagram................................................................7-2
Display Board
Circuit Diagram................................................................8-1
Layout Diagram ..............................................................8-2
Mechanical Exploded View ..................................................... 9
Trouble Shooting...........................................................10
Software Upgrade & Procedure To Restore Product Setting....11
Revision list ............................................................................12




Published by Xu & Kelly wk1422 Subject to modification 314003862000

Version1.0
1 .Location of PC Boards & Versions Variation
Location of PC Boards


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6




Versions Variation


Type/Version BTM2335
/12
Board in used Service Policy
Main board M
Display board M




Tips: C--Component Level Repair
M--Module Level Rpair
2. Technical Specification

MODELBTM2335
TEST CONDITIONS:
1.POWER SUPPLY: AC.Accordiing to Ver
2.REF OUTPUT: 4 1W , 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 87.5
1 Fvequency Range MHz
108 108 108 108
90.1 16 22 17 17
2 26dB QUENTING SENSITIVITY 98.1 dBf 16 22 18 17
106.1 16 22 18 18
3 -3dB LIMITING POINT dBf 20 26 20 20
4 FM IF REJECTION 98MHZ S/N=26dB dB 65 60 65 65
5 IMAGE REJECT 98MHZ S/N=26dB 40 25 40 40
MONO dB 50 45 58 58
6 S/N
ST 50 45 NA NA
7 OVERALL DISTERTION % 2 5 0.2 0.2
8 MODULATION HUM dB 50 45 60 60
90MHz dBf _ 16-36 34 34
9 TUNING SENS 98MHz dBf _ 16-36 34 34
106MHz dBf _ 16-36 35 34
10 STEREO CHANNEL SEPARATION 1KHz dB 25 18 35 37
11 THD 10% POWER 1KHz W _ 10