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Aiwa SX-WNH81 User Manual

Aiwa SX-WNH81
37 pages
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SERVICE MANUAL
DATA
COMPACT DISC STEREO
CASSETTE RECEIVER
NSX-SZ70
NSX-SZ72
NSX-SZ73
EZ,K
EZ
EZ
S/M Code No. 09-006-425-3R3
REVISION
BASIC TAPE MECHANISM: 2ZM-3MK2 PR4NM
BASIC CD MECHANISM: AZG-1 ZD3RDM
This Service Manual is the “Revision Publishing” and replaces “Simple Manual”
NSX-SZ70/SZ72/SZ73 (S/M Code No. 09-002-425-3T3).
If requiring information about the CD mechanisim, see Service Manual of AZG-1
(S/M Code No. 09-001-335-3N8).
CD-CASSEIVER
CX-NSZ70
CX-NSZ72
CX-NSZ73
SPEAKER
SX-WNSZ70
SX-WNSZ71
SX-WNH81
SYSTEM
NSX-SZ70
NSX-SZ72
NSX-SZ73
REMOTE CONTROLLER
RC-ZAS01
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Aiwa SX-WNH81 Specifications

General IconGeneral
TypeStereo Receiver
Power output80W per channel (4 ohms, 1kHz, 10% THD)
Frequency Response20Hz to 20kHz
Total harmonic distortion0.8%
Speaker load impedance8Ω to 16Ω

Summary

SPECIFICATIONS

FM, MW, LW Tuner Specifications

Detailed specifications for FM, MW, and LW tuner sections.

Amplifier Specifications

Power output, total harmonic distortion, and input/output details.

Compact Disc Player & Speaker System Specifications

CD player specs, speaker impedance, sensitivity, and dimensions.

General Unit Specifications

Power requirements, consumption, dimensions, and weight.

SERVICING SAFETY AND PRECAUTIONS

Laser Beam Protection During Servicing

Safety measures to protect eyes from laser radiation during servicing.

Electrostatic Discharge Precautions

Precautions to prevent damage to optical blocks from static electricity.

REPAIR PREPARATION AND CHECKS

Forced Discharge of Power Supply Capacitors

Procedure to safely discharge electrolytic capacitors before repair.

Microcomputer Pre-Exchange Checks

Checks for HOLD terminal status and software reset procedures.

SERVICE SCHEMATICS AND WIRING DIAGRAMS

Main Board Wiring and Schematics

Wiring and schematic diagrams for the main control and power boards.

Deck and Amplifier Schematics

Schematics for cassette deck, amplifier, and tuner sections.

Front Panel and PT Circuit Diagrams

Wiring and schematic diagrams for front panel, PT, and related circuits.

IC FUNCTIONAL DIAGRAMS

Key IC Block Diagrams

Diagrams illustrating the internal functions of major ICs used in the unit.

SPEAKER ASSEMBLY AND PARTS

Speaker Disassembly Instructions

Step-by-step guide for disassembling speaker units.

Speaker Parts Lists

Lists of parts for different speaker models.

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