TABLE OF CONTENTS

Page

Location of PCB boards and version variation ............................1

T
Technical specification ............................................................2-3
..........................................................
Safety instruction........................................................................ 4
ESD protection.............................................................................5
Safty precautions ........................................................................6
Set Block diagram ...................................................................7-8
Set Wiring diagram .....................................................................9
Disassembly diagram ................................................................10
Main board
Circuit diagram...............................................................11-14
Layout diagram..............................................................15-16
Display board
Circuit diagram.....................................................................17
Layout diagram...............................................................18-19
Mechanical Exploded view..... .................................................20
 1

Location of PCB Boards

Display Board

Main Board

VERSION VARIATION

Type /Versions: MCM2150

/05 /12 /98
Board in used: Service policy (GREAT BRITAIN) (EUROPE) (ASIA)

Main BOARD C/M C

Display BOARD C/M C

Type /Versions:
MCM2150
Features Feature diffrence /05 /12 /98
RDS
VOLTAGE SELECTOR
ECO STANDBY - DARK

* TIPS : C -- Component Lever Repair.

M -- Module Lever Repair
-- Used
 
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MCM2150 Elec parameter Test Report
TEST CONDITIONS:
1.POWER SUPPLY: AC.Accordiing to Ver
2.REF OUTPUT:8ȍ 1W , Sound effect off
3.FM MONO: 22.5KHz Dev,1KHz MODULATION ,75ȍ 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  
1 Fvequency Range MHz
108  
90 18 22  20
2 26dB QUENTING SENSITIVITY 98 dBf 18 22  19
106 18 22  18
3 -3dB LIMITING POINT dBf 17 25  19
4 FM IF REJECTION 98MHZ S/N=26dB dB 55 50 ! !
5 IMAGE REJECT 98MHZ S/N=26dB dB 24 20 ! !
6 SELECTIVITY S 0.3 dB 40 33  
MONO 55 50  58
7 S/N
ST 55 50  /
8 OVERALL DISTERTION % 3 5  0.4
9 MODULATION HUM dB 45 40  43
63Hz ±3  /
10 FREQUENCY RSEPOUSE dB
12.5K ±3  /
90MHz dBf 24-32 19 - 35  31
11 TUNING SENS 98MHz dBf 24-32 19 - 35  31
106MHz dBf 24-32 19 - 35  31
12 AUTO TUNING SENG ALL dBf 24-32 19 - 35  
˘91 MHz 0  
13 TUNING ACCURAY
˚91 MHz 0.5  0
400Hz dB 21 18  48
14 STEREO CHANNEL SEPARATION 1KHz dB 25 20  36
5KHz dB 18 15  26
15 THD 10% POWER W 25 Z Z
CD SECTION˖
TEST DATA
NO TEST ITEMS UNIT NOM. LIMIT
1# 2#
1 TOTAL HARMONIC DISTORTION 1KHz % İ İ  
2 S/N (1KHz,A-weightde) dBA 76 70 94 
FREQUENCY RESPONSE AT 40Hz dB ±3  
3 L/R
LOUDSPEAKER OUT 16KHz dB ±3 -2.9 
4 CHANNEL DIFFERENCE (1KHz) dB 0 İ2 0.1 
L dB 40 26  
1K
R dB 40 26  
5 CHANNEL SEPARATION
L dB 30 16  
10K
R dB 30 16  
 
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6 Residual noise (Vol min) nW İ40  
7 HUM nW İ00  
8 10% THE POWER W 25 : :
AUX SECTION˖
TEST DATA
NO TEST ITEMS UNIT NOM. LIMIT
1# 2#
1 L/R OUTPUT POWER (10% THD, Ohm,1KHz) W 25 Z Z
FREQUENCY RESPONSE AT 40Hz dB ±3 -3 -3.5
2 L/R
LOUDSPEAKER OUT 16KHz dB ±3 -0.9 1.7
3 AMPLIFIER DISTORTION % İ İ  0.46
L dB 40 26 75 68
1K
R dB 40 26 58 53
4 CHANNEL SEPARATION
L dB 30 16 71 57
10K
R dB 30 16 56 42
5 CHANNEL DIFFERENCE˄1KHz˅ dB 0 İ2 0 0
LEVEL
FM 1KHz 67.5KHz DEV,68dBf dB - ±5 4 4
DIFFERENCE
6
(RATED OUTPUT
CD disc1-6dB track35 dB - ±3 3 3
POWER AT 1KHz)
INPUT SENSITIVITY(RATED OUTPUT POWER AT
7 mV 600 ±200 660 640
1KHz,10%THD
8 S/N RATIO (1KHz,A-WEIGHTED) dBA İ İ 86 78
9 HUM (VOL.MIN-MAX-20dB,without signal) nW - İ200 80 125
10 RESIDUAL NOISE (VOL.MIN.with signal ) A-WEIGHTED nW - İ40 6 11
 4

Safety instruction
 5

ESD PROTECTION
 6

SAFTY PRECAUTIONS
 7

Set Block diagram

 8

Set Block diagram

 9

Set Wiring diagram

 10

Disassembly diagram
DISMANTING DIAGRAM
1)Dismanting of the top cabinet:Remove 10 screws A&B as indicated to loosen the top cabinet

A B

2)Dismanting of the PCB board:

a: Remove 6 screws C as indicated to loosen the main board
b: Remove 9 screws D as indicated to loosen the display board

D
C
 11

Main board Circuit diagram

 12

Main board Circuit diagram

 13

Main board Circuit diagram

 14

Main board Circuit diagram

 15

Main board Layout diagram

 16

Main board Circuit diagram

 17

Display board Circuit diagram

 18

Display board Layout diagram

 19

Display board Layout diagram

 20

Mechanical Exploded view