Service Manuals, User Guides, Schematic Diagrams or docs for : . Rare and Ancient Equipment BOSS MR1500W boss_mr1500w_sm

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PLL SYNTHESIZER STEREO RADIO WITH
COMPACT DISC PLAYER DIGITAL

POWER MODE
CDC CONTROLLER
DISP
VOL BA EJ ECT
MTL AMS LOUD

ND
RPT RDM INT
SEL DISC MUTE MUTE

VOL
DIM LOUD
CD PLAYER RECEIVER

SHIFT/SCAN 1 2 MEM 3 PGM 4 RPT 5 RDM 6 INT 7 8 9 0
OPEN

MODEL: MR-1500W
CONTENTS

Page
Disassembly Instructions ........................................................................................................................................ 3
Disassembly Diagram............................................................................................................................................. 4
Operation Check..................................................................................................................................................... 5
Block Diagram ........................................................................................................................................................ 6
Alignment Locations ............................................................................................................................................... 7
Alignment Procedures ............................................................................................................................................ 8
Printed Circuit Boards........................................................................................................................................... 10
Exploded Views (Panel)........................................................................................................................................ 15
Exploded View Parts Lists (Panel)........................................................................................................................ 16
Exploded Views (Cabinet) .................................................................................................................................... 17
Exploded View Parts Lists (Cabinet) .................................................................................................................... 18
Exploded Views (Deck)......................................................................................................................................... 20
Exploded View Parts Lists (Deck)......................................................................................................................... 21
Schematic Diagram .............................................................................................................................................. 23
Electrical Parts List ............................................................................................................................................... 26
Specifications........................................................................................................................................................ 32

2
DISASSEMBLY INSTRUCTIONS

1. Using the unlock key that came with the unit or a similar tool, unlock the Mounting Box and remove toward the
rear of the unit.

2. Remove four screws (A) located each side of the top cabinet then remove the Top Cabinet.

3. Remove two screws (B) located on the front deck bracket.
Remove two screws (C) located each side of the cabinet bottom.

4. Remove two screws (D) located under the front deck bracket then remove the Front Deck Bracket.
Remove two screws (E) located under the rear deck bracket then remove the Rear Deck Bracket.

5. Take Out the Front Panel; The Panel Bracket and the Watertight Ring 2.

6. Remove six screws (F) located base for CD of the front then remove the Base For CD and the Watertight 3.

7. Remove two screws (G) from on the cabinet bottom then remove the Front Cabinet.

8. Remove five screws (F) located on the heat sink of the back then remove the Heat Sink.

9. Remove two screws (I) located on the rear cabinet of the back then remove the 22PIN Socket and the Main
Board.

10. Remove two screws (J) from each side of the cabinet bottom then remove the Rear Cabinet and the Cabinet
Bottom.

3
DISASSEMBLY DIAGRAM

4
OPERATION CHECK

GENERAL SPECIFICATIONS OF SIGNAL

Standard frequency FM 98.1 MHz (87.5, 107.9 MHz)
AM 1000 kHz (530, 1710 kHz)
Signal output FM 1 mV
AM 5 mV
Modulation AM 400 Hz 30% MOD.
FM Stereo 1 kHz 75 kHz DEV.
90% for L only or
R only pilot level 10%
AF output level FM/AM
Power source voltage DC 14.0V (Backup voltage is the same as this)
AF load impedance 4 ohm pure resistance
Balance Center position of level
Tone Center position
The signal strength read in this section is voltage on the antenna.
Test Diagram
ACC (DV14.4V)
2-SPEAKER 4-SPEAKER 4-SPEAKER 2-SPEAKER
RR.
RL. SPK.
SPR. BACK UP (14.4V)
FRONT FRONT
SPK. SPK.
FL. FR.
SPK. SPE. GROUND

POWER ANTANNA

MAIN UNIT

ANT

MPX
DUMMY STEREOS
DISTORTION ANTANNA MODULATOR
METER VTVM VTVM

AM SG FM SG

5
BLOCK DIAGRAM

6
ALIGNMENT LOCATIONS

FM/AM TUNER

7
ALIGNMENT PROCEDURES

FM ADJUSTMENT

Equipment Required

AM IF/RF signal generator
Solid-state voltmeter (SSVM)
Regulated DC power supply
2-CH voltmeter
Distortion meter

FM Alignment Using FM Signal Generator

Note: Press the radio power switch to on the radio. Signal generator output must be kept as low as possible
to avoid overload and clipping.

Step Generator Generator Display Adjustment Remarks
Coupling Setting
Stereo Signal 98.1 MHz Adjust AF
Separation Generator Int. 1 kHz 98.1 MHz VR1 output power
to antenna Dev. 75 kHz at maximum
receptacle L+R = 90 % separating
pilot = 10 % more than 30 dB
FM SNC 98.1 MHz
Adjustment Dev. 75 kHz 98.1 MHz 98.1 MHz VR2 Stereo Separation
L+R=90 % @ 40 dB

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