Aiwa Z-KD970 User Manual

SERVICE MANUAL
DATA
COMPACT DISC STEREO
CASSETTE RECEIVER
BASIC TAPE MECHANISM : 2ZM-3MK2 PR5NM
BASIC CD MECHANISM : 6ZG-1 VZRDM
Z-KD770
Z-KD970
HR
HR
S/M Code No. 09-008-434-5R1
REVISION
• This Service Manual is the "Revision Publishing" and replaces "Simple Manual"
Z-KD770/KD970, (S/M Code No. 09-005-434-5T1).
• If requiring information about the CD mechanism, see Service Manual of
6ZG-1, (S/M Code No. 09-001-338-7N2).
Z–KD770
SPEAKERSYSTEM
CD
CASSEIVER
SX–ZHT730
SX–CR677
CX–ZKD770
REMOTE
CONTROLLER
RC–ZAS08
Z–KD970
CX–ZKD970
SX–ZHT930
SX–CR677
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Aiwa Z-KD970 Specifications

General

Brand	Aiwa
Model	Z-KD970
Track System	4-track, 2-channel stereo
Motor	DC servo motor
Type	Cassette Deck
Frequency Response	20 Hz - 20 kHz
Input	Line In, Mic In
Output	Line Out, Headphones
Dimensions	430 x 120 x 270 mm
Power Supply	220V

Summary

Product Specifications

Laser Safety During Servicing

Laser Beam Exposure Warnings

Cautionary notes regarding direct eye exposure to laser radiation.

Optical Block Handling Precautions

Guidelines for safely replacing the optical pickup block.

Repair Preparation and Diagnostics

Power Supply Capacitor Discharge Procedure

Steps for safely discharging power supply electrolytic capacitors before repair.

Microcomputer Troubleshooting Checks

Pre-exchange checks for the microcomputer, including HOLD terminal status.

Microcomputer Reset Procedure

Main Unit Diagrams

Component Board Diagrams

Integrated Circuit Block Diagrams

Tuner Section Adjustments

Tuner Frequency, VT, and Tracking Checks

Tuner IF and DC Balance Adjustments

Deck Section Adjustments

Deck Speed, Azimuth, and Playback Checks

Deck Record/Playback Adjustments

Micon Section Adjustments

Micon OSC Adjustment

CD Test Mode Operation

Starting and Cancelling CD Test Mode

Instructions for entering and exiting the CD test mode.

CD Test Mode Functionality

Description of modes like Start, Search, Play, Traverse, and Sled test functions.

Speaker Disassembly and Reassembly