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Micro System MCM2300/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 wk1352 Subject to modification 3140 038 61310


Version 2.0
1.Location of PC Boards & Versions Variation

Location of PC Boards



AA AA AA
AA AA AA
AAAAAAAAAAAAAAAAAA AAAA AAAA AA
AA
47
5

AA AAAA AAAA AAAA AAAA AA
AA
AA AA AA 7AA AA A
AA AA
AA AAAA AAAA AAAA AAAA AAAAA
AAA AA AA AA AA
AA AA AA AA
A 7 AAAAAAAAA AAAAAA AAAAAAAA
AA


7
"

6




Versions Variation


Type/Version MCM2300
/12 /12
Board in used Service Policy (EU) (APMEA)
/55 /96
Main board M M+C M+C M+C
Display board M M+C M+C M+C




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

moduleMCM2300




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
42# 2#
87.5 87.5 87.5 87.5
1 Fvequency Range MHz
108 108 108 108
90.1 16 22 14 13
2 26dB QUENTING SENSITIVITY 98.1 dBf 16 22 13 13
106.1 16 22 13 13
3 -3dB LIMITING POINT dBf 20 26 10 10
4 FM IF REJECTION 98MHZ S/N=26dB dB 65 60 113 113
5 IMAGE REJECT 98MHZ S/N=26dB 40 25 113 113
MONO dB 65 60 68 68
6 S/N
ST 55 50 64 65
7 OVERALL DISTERTION % 1 2 0.2 0.2
8 MODULATION HUM dB 45 40 58 58
90MHz dBf _ 19-35 18 18
9 TUNING SENS 98MHz dBf _ 19-35 18 18
106MHz dBf _ 19-35 18 18
10 STEREO CHANNEL SEPARATION 1KHz dB 25 18 39 39
11 THD 10% POWER 1KHz W _ 5