Aiwa NSX-S16 - User Manual

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Overview

Function Description
Important Technical Specifications
Usage Features
Maintenance Features

This document serves as a service manual supplement for a range of Aiwa compact disc and stereo cassette receiver models, specifically addressing changes related to the CD mechanism.

Function Description

The devices covered by this manual are integrated audio systems designed to play compact discs and stereo cassette tapes, while also functioning as receivers for radio broadcasts. They combine multiple audio sources into a single unit, providing a comprehensive entertainment solution. The core functionality revolves around audio playback from physical media (CDs and cassettes) and reception of radio signals.

Important Technical Specifications

The manual highlights a significant change in the CD mechanism, specifically the Digital Signal Processor (DSP) IC. This change involves a transition from a SONY DSP IC to a SANYO DSP IC within the 4ZG-1 CD mechanism. This modification affects the following models and their regional variants:

NSX-S16: EZ, K
NSX-A111: U
NSX-S111: HA, LH, HR, HE, HS, EZ, K, G, V
NSX-S112: EZ
NSX-A115: U
NSX-S116: HC, EZ
NSX-S119: LH

The basic CD mechanism for all listed models is identified as 4ZG-1. However, there are variations in the specific CD mechanism sub-types depending on the model and region:

4ZG-1 Z3RNDSHJM: Used in NSX-S16 (EZ), NSX-A111 (U), NSX-S111 (all variants), NSX-S112 (EZ), NSX-A115 (U), NSX-S116 (EZ), and NSX-S119 (LH).
4ZG-1 Z4RNDSHC: Used in NSX-S16 (K).
4ZG-1 Z4RNDSHC1: Used in NSX-S116 (HC).
4ZG-1 Z3RNDSHM: Used in NSX-S119 (LH).

The electrical main parts list details specific component changes on the PWB (Printed Wiring Board), primarily affecting the IC101 (Digital Signal Processor IC) and several resistors (R103, R107, R108, R140, R810, R811, R814, R815, R816, R817, R715, R858) and capacitors (C801).

For models NSX-A111/A115/S111/S119 (U, HA, LH), the IC101 changes from C-IC,M38B59MFH-P109FP (SONY, 8Z-NFA-631-010) to C-IC,M38B59MFH-P117FP (SANYO, 8Z-NFA-671-010). Correspondingly, C801 (1000P) is removed, and several resistors have their values changed or are removed (e.g., R108 from 1k to 10k, R814 and R815 removed).

For models NSX-S111/S112/S116/S16 (HR, HE, HC, HS, EZ, K, G, V) and NSX-S16 (K), the IC101 changes from C-IC,M38B59MFH-P113FP (SONY, 8Z-NFA-661-010) to C-IC,M38B59MFH-P117FP (SANYO, 8Z-NFA-671-010). D801 (1SS133) is replaced with a jumper, and C801 is removed. Similar to the previous group, numerous resistor values are updated or components are removed. For instance, R103 changes from 1k to 82, R107 from 470 to 1k, and R108 from 1k to 10k.

Usage Features

While the manual primarily focuses on service information, the listed models are stereo cassette receivers, implying standard usage features for such devices:

CD Playback: Users can play audio compact discs. The change in the DSP IC is an internal modification that should not directly impact the user's experience of CD playback, but rather ensure continued functionality or potentially improved performance/reliability with the new component.
Cassette Playback/Recording: Users can play and likely record on stereo cassette tapes.
Radio Reception: The "receiver" designation indicates the ability to tune into and listen to radio broadcasts (AM/FM, depending on the model and region).
Integrated Design: The "compact disc / stereo cassette receiver" implies a single, integrated unit, simplifying setup and operation for the user.

Maintenance Features

This document is a service manual supplement, making its content directly relevant to maintenance and repair. Key maintenance features include:

Component Identification for Repair: The "ELECTRICAL MAIN PARTS LIST" provides crucial information for technicians, detailing which components have changed and their new specifications. This is essential for ordering correct replacement parts and performing accurate repairs.
Cross-referencing with Existing Manuals: The manual explicitly directs technicians to other service manuals for comprehensive information:
- For other information not covered by this supplement, refer to the service manuals for NSX-A111/A115/S111/S119 (U, HA, LH) (S/M Code No. 09-993-404-3R1), NSX-S111/S112/S116/S16 (HR, HE, HC, HS, EZ, K, G, V) (S/M Code No. 09-996-404-3R2), and NSX-S16 (K) (S/M Code No. 09-999-404-3S1).
- For information specifically about the 4ZG-1 CD mechanism, refer to its dedicated service manual (S/M Code No. 09-992-325-4N2). This modular approach to documentation allows technicians to access detailed information for specific sub-assemblies.
Part Number Updates: The "OLD PART" and "NEW PART" columns in the parts list are critical for ensuring that technicians use the correct components during repairs, especially given the change in the DSP IC manufacturer. This prevents compatibility issues and ensures the device functions as intended after service.
Regional and Model Specificity: The manual clearly delineates component changes based on specific model numbers and regional variants (e.g., EZ, U, HA, LH), which is vital for accurate troubleshooting and repair in a global market.
Troubleshooting Guidance (Implied): While not explicitly stated as troubleshooting steps, the detailed list of component changes serves as a guide for technicians when diagnosing issues related to the CD mechanism or general functionality that might be affected by the DSP IC change. If a device exhibits symptoms, knowing the specific component revisions helps narrow down potential causes.

In summary, this supplement is a vital resource for service personnel, ensuring they have the most up-to-date information regarding internal component changes, particularly within the CD mechanism, to effectively maintain and repair the listed Aiwa compact disc and stereo cassette receiver models.