Introduction
This document is the official service manual for the KENWOOD DPF-1010, DPF-1010E, DPF-2010, and DPF-2010E Compact Disc Players. It is intended for use by authorized service personnel for the repair and maintenance of these units. This manual provides essential information for units with serial numbers from 80900001 onwards. For units with serial numbers before 80900000, please refer to the original service manual (B51-5428-00).
Key Contents
The manual covers various aspects crucial for servicing the CD players, including:
- Detailed pin descriptions for integrated circuits.
- Test mode procedures for diagnostics and adjustments.
- Key functions in test mode for precise control.
- Comprehensive adjustment procedures for the CD section, including focus offset, tracking offset, E/F balance, and RF level AGC functions.
- Exploded views of the mechanism and unit for easy identification of components.
- Detailed PC board component side views.
- Extensive parts lists for both mechanical and electronic components, including part numbers and descriptions.
- Block diagrams illustrating the overall system architecture and signal flow.
- Circuit descriptions providing in-depth understanding of the electronic pathways.
- Full technical specifications for the DPF-1010, DPF-1010E, DPF-2010, and DPF-2010E models, covering audio performance, digital output, power consumption, dimensions, and weight.
Important Cautions and Notes
Before transporting or moving the unit, specific operations must be performed to prevent damage. The manual also outlines procedures for resetting the microcomputer in case of malfunction, noting that this will erase stored information and restore factory settings. Safety critical components must be replaced only with manufacturer's recommended parts to ensure continued safety and prevent risks such as fire or electric shock. DC voltage measurements are provided as actual readings, which may vary slightly depending on the measuring instruments or the product.
Product Overview
The KENWOOD DPF-1010/1010E/2010/2010E are compact disc players designed for high-fidelity audio reproduction. They feature a semiconductor laser and 1-bit D/A conversion with 8fs (352.8 kHz) oversampling. The units offer both variable and fixed output levels, as well as optical digital output. Automatic adjustment functions are integrated into the CD system, reducing the need for manual readjustment when replacing the pickup unit.
