Aiwa XR-EM31 User Manual

SERVICE MANUAL
DATA
XR-EM30
XR-EM31
EZ(S),K(S)
CD STEREO SYSTEM
BASIC TAPE MECHANISM : CMAL5Z213B
BASIC CD MECHANISM : KSM-213 RDM
S/M Code No. 09-023-454-8R2
REVISION
SYSTEM
XR-EM30
XR-EM31
CD CASSEIVER
CX-SLEM30
CX-SLEM31
SPEAKER
SX-SLEM30
REMOTE
CONTROLLER
RC-CAS07
• This Service Manual is the “Revision Publishing” and replaces “Simple Manual”
XR-EM30 <U(S), EZ(S), K(S)> (S/MCode 09-023-454-8T1).
EZ(S)

Aiwa XR-EM31 Specifications

General

CD Player	Yes
Radio Tuner	FM/AM
Bluetooth	Yes
USB Port	Yes
Speaker Configuration	2.0
Cassette Deck	No
Playable Media	CD, USB
Speakers	2
Power Output	30W (15W x 2)

Summary

Specifications Overview

Main Unit Specifications

Details tuner, amplifier, cassette deck, and CD player specifications for the main unit.

Speaker System Specifications

Laser Safety Precautions

Servicing Warnings and Cautions

Essential warnings and cautions regarding laser beam exposure during servicing procedures.

Optical Block Replacement Precautions

Electrostatic Discharge (ESD) Warning

Warns about electrostatic discharge potentially damaging the laser diode in the optical block.

Electrical Parts List

Main Circuit Schematic Diagram

Main Circuit Wiring Diagram

Front and Deck Circuit Schematic Diagrams

Front C.B Schematic

Displays the schematic diagram for the front circuit board.

Deck C.B Schematic

Shows the schematic diagram for the tape deck circuit board.

CD Circuit Schematic Diagram

Front and CD Circuit Wiring Diagram

Tuner Circuit Schematic Diagram

Tuner Circuit Wiring Diagram

Power Transformer Circuit Schematic Diagram

Power Transformer Circuit Wiring Diagram

Deck Circuit Wiring Diagram

Voltage Charts Overview

Transistor Voltage Chart (Main/Front-CD)

IC Voltage Chart (Main C.B)

Voltage Charts (Continued)

IC Voltage Chart (Front/CD C.B)

IC Voltage Charts (LC78622NE, BA5949FP, LC72131, LA1845N-A)

Tuner Section Voltage Chart

CD Section Voltage Chart (LA9241ML)

Electrical Adjustments

Clock Adjustment

Procedure for adjusting the clock frequency on the front PWB.

Electrical Adjustments (Continued)

Tape Speed Adjustment

Steps for adjusting tape speed using a wow-flutter meter.

Head Azimuth Adjustment

Method for adjusting the head azimuth screw for optimal playback.

Tuner Adjustments (Clock, VT, Tracking)

De Balance and Tracking Adjustments (LW/MW)

LW and FM Tracking Adjustments

CD Focus Offset Adjustment

Procedure to adjust the CD focus offset using a multimeter.

CD Jitter, Tracking Balance, and Playability Checks

Procedures for checking CD jitter, tracking balance, and playability.

Wow-Flutter Check

Procedure for checking wow and flutter levels on the tape mechanism.

Rec. Bias Frequency Adjustment

Steps to adjust the bias frequency for recording using a frequency counter.

CD RF Waveform Check

CD Test Mode Operations

Starting the CD Test Mode

Exiting the CD Test Mode

Test Mode Functions and Applications

Mechanical Exploded Views

Overall Mechanical Exploded View

Speaker Disassembly Instructions

Speaker Panel Removal and Attachment