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Micro System MCM2350/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 ............................................................................................................7
Circuit Diagram .............................................................................................7-1
Layout Diagram .............................................................................................7-2
Display Board ........................................................................................................8
Circuit Diagram .............................................................................................8-1
Layout Diagram .............................................................................................8-2
Mechanical Exploded View ...................................................................................9
Trouble Shooting ................................................................................................10
Software Upgrade & Procedure To Restroe Product Setting ...............................11
Revision List ........................................................................................................12
Published by Li&Kelly wk1450 Subyect to modification 3140 038 61310
Version 1.0
1.Location of PC Boards
Main Board Display Board
Versiongs Variation
Type/Version MCM2350
/12 /12
Board in used service Policy (EU) (APMEA)
Main Board M M+C
Display Board M M+C
Tips:C--Component Level Repair
M--Module Level Rpair
2.Technical Specification
MCM2350
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
87.5 87.5 87.5
1 Fvequency Range MHz
108 108 108
88 18 22 18 18
2 26dB QUENTING SENSITIVITY 98 dBf 18 22 18 18
107 18 22 15 15
3 -3dB LIMITING POINT 98 dBf 20 26 7 7
4 FM IF REJECTION 98MHZ S/N=26dB 98 dB 65 60 65 65
5 IMAGE REJECT 98MHZ S/N=26dB 107 dB 30 25 30 30
MONO 65 60 68 68
6 S/N
ST 55 50 / /
7 OVERALL DISTERTION % 2 3 0.2 0.2
8 MODULATION HUM dB 50 45 70 70
88MHz dBf 24 30 27 27
9 TUNING SENS 98MHz dBf 24 30 27 27
107MHz dBf 24 30 28 28
10 STREO CHANNEL SEPARATION 1KHZ Db 25 18 38 38
11 THD 10% POWER 1KHZ W 30 30'