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This document is a service manual for the Sony KV-A2121D/A2521D/A2921D Trinitron Color TV, chassis AE-1C, AEP model. It provides comprehensive information for servicing and maintaining the television set.
The Sony KV-A2121D/A2521D/A2921D is a Trinitron Color TV designed for AEP (Audio-Video European Product) markets. It supports multiple television and color systems, including B/G/H for TV system, and PAL, SECAM, NTSC3.58, NTSC4.43 for color system. It also features German stereo sound. The TV is equipped with a Hi-Black Trinitron tube, available in three sizes: 54.5 cm (21 inches) with 100-degree deflection, 63.5 cm (25 inches) with 110-degree deflection, and 72.4 cm (29 inches) with 110-degree deflection.
The television offers a variety of input and output options. Inputs include two 21-pin CENELEC standard connectors (one with RGB input, the other with S-video input), and front-mounted audio and video input jacks (phono jack, including S-video input). Outputs include a 21-pin CENELEC standard connector, a headphones jack (stereo minijack), external speaker terminals (2-pin DIN), and audio output jacks (phono jack, with output dependent on TV settings).
The remote control system operates via infrared and requires two AA batteries. The manual details basic functions such as turning the TV on/off, program selection, and volume control. It also covers special functions for adjusting picture and sound, inserting channel names, and fine-tuning channels. The teletext service is supported, allowing users to access information broadcasted by TV stations. The FASTEXT function provides rapid access to teletext pages.
The manual guides users through initial setup, including automatic and direct TV channel presetting. It explains how to memorize broadcasting stations, exclude unwanted channels, and temporarily tune channels. Basic operations like program selection and volume adjustment are detailed for both the TV unit and the remote control. Special functions allow for personalized picture and sound adjustments, including color, contrast, brightness, hue, picture definition, bass, treble, and speaker balance. The teletext service provides access to information, with features like page index, sub-pages, and access to previous/following pages. The FASTEXT function offers quick access to teletext functions via color-coded keys on the remote. The TV can be connected to various external audio/video machines such as videocameras, VTRs, videodisc players, or stereo systems using the provided connectors.
The service manual includes detailed disassembly instructions for various components, such as the rear cover (for 21-inch, 25-inch, and 29-inch models), chassis assembly, A and J1 boards, and B1 and V boards. It also provides specific instructions for picture tube removal, including how to handle the anode cap safely.
Set-up adjustments are crucial for optimal performance and are outlined in detail. These include:
The manual emphasizes safety precautions, particularly regarding high voltage components during inspection and repair. It also highlights critical components for safety, which should only be replaced with specified part numbers. The document includes block diagrams, circuit board locations, printed wiring boards, schematic diagrams, and an electrical parts list to aid in troubleshooting and repair.
General