Grundig TK 24 Tape Recorder Service Manual
Service manual for the Grundig TK 24 tape recorder with four-spur (Vierspur) format. Contains detailed mechanical and electrical sections. Mechanical section covers general information, lubrication, functional description of drive and tape transport systems, coupling mechanisms, belt guidance and transport, and auxiliary tools. Electrical section includes tube-based circuitry diagrams for recording and playback channels, frequency response curves, measurement circuits (Entzerrer-Kurven, Aufnahme), relay configurations, contact assemblies, and winding specifications. Technical measurements and specifications provided for all electrical parameters.
Table of Contents:
- Recording Input Sockets TK 120/140
- Input impedance over 100 kΩ single-ended
- Microphone/Radio input impedance at socket Ms. 1 or directly at Ms. 2
- Input impedance 100 kΩ at Ms. 3
- Control voltage at Ms. 4 after connection
- Frequency response 20 Hz to 20 kHz
- Input setting: Micro/Radio 1.2
- Measurement: Head microphone at 100 kΩ parallel to head system
- Speaker setting: Speaker Start
- Regler and Schalter: Pegelregler auf, Klangregler hell
- Amplification
- Verification of input sensitivity with 1000 Hz
- Input voltage drop of 100 mV required at input for voltage follower
- Damping of input stage to speaker input
- Voltage measurement and output control of EM 84 controller
- Final setting with R 21
- Frequency measurement
- Frequency measurement at radio microphone input
- Frequency at 66 Hz
- Frequency at 12000 Hz
- Frequency response spike
- Intermediate values see recording curves
- Rated input voltage maximum
- Input short-circuit
- Input open-circuit
- During incorrect HF-Premagnetization and discharge, maximum voltage at speaker output allowed
- Final stages
- Measurement at playback parallel to 5 Ω load
- Damping of measuring circuit
- Distortion and distortion factor
- Output voltage of 333 kHz
- Frequency response
- Frequency response and distortion factor
- Foreign voltage
Documentation must be downloaded on a computer (PC, Mac, or Linux).
Do not use a smartphone or tablet to download documentation; they generally lack sufficient memory capacity to handle large files, and few users know how to locate the download folder on these devices.
Once downloaded, you can use it right away and even print the pages you need, or use your smartphone in photo mode to translate into the language of your choice: Google Translate
Document Details
- Format
- Pages
- 24
- Size
- 9.0 MB
- Category
- Audio & HiFi