Grundig TK 54 Tape Recorder Service Manual
Service manual for the Grundig TK 54 tape recorder, providing comprehensive technical guidance for technicians servicing this classic reel-to-reel deck. The mechanical assembly section covers the tape transport mechanism in detail, including belt drive configuration, coupler adjustments, fast forward and rewind functions, and the complete brake system. The electrical section includes frequency response curves for both playback and recording modes, measurement circuit diagrams, and full technical specifications. A detailed mechanical breakdown on the rear cover shows the internal tape transport assembly and component layout, essential for understanding the recorder's mechanical architecture and performing field repairs or adjustments.
Table of Contents:
- Recording sockets TK 120/140
- Input impedances are over 100 kΩ single-ended
- Amplification
- Input sensitivity
- Microphone/radio input
- Headphone output
- Regulator and switches
- Amplification verification
- For a voltage drop of 100 mV at input, the following voltages are required at the microphone/radio input
- Test voltage at headphone output
- Voltage measurement is also performed on the EM 84 controller
- Frequency measurement
- Frequency measurement is performed at the radio microphone input
- At 66 Hz frequency
- At 12,000 Hz frequency
- The peak value of the frequency response is at 12,000 Hz
- Intermediate values see attenuation curves Appendix
- Maximum permissible input voltage
- Input at 100 kΩ closed
- Input at short circuit
- With incorrect HF pre-magnetization and discharge voltage setting at headphone output
- Final stages
- The measurement is performed with feedback parallel to a load resistance of 5 Ω ± 2%
- Input impedance
- Distortion factor and clipping factor
- At 333 kHz an output voltage of a clipping factor is required
- Frequency response
- A control voltage of 100 mV at 3.2 kHz of the radio input
- At 1000 Hz frequency
- Just at the sound regulator dark (12,000 Hz) a voltage of
- Remote voltage
- Remote voltage must be maintained
- Loudspeaker impedance regulator to
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Document Details
- Format
- Pages
- 23
- Size
- 3.5 MB
- Category
- Audio & HiFi