The TEAC A-1500's Service Manual was instrumental in reviving this classic reel-to-reel. Not only does it have the schematics, exploded parts diagram and parts list, it also provided mechanical adjustment information that approximate factory default settings.
This service manual was determinant to enable to fix my Alpine Amplifier. I am pleased with my purchase. For a 5 star rating I would like to see a higher resolution scan of the printed circuit board lay-out because the gray scale grafics was dificult to see. Also some schematic diagrams were scanned at a slight angle. Never the less, it had all information I needed to troubleshoot and service my equipment.
Complete manual, the good quality of reproduction allows enlarged print-out of the schematic diagram in the size it probably had in the original print edition and which is necessary for practical use.
The service manual was complete and the components on the drawings very good visible.
Text excerpt from page 18 (click to view)
7. The voice of the caller cannot be heard (incoming call).
Can the base and handset be connected? OK The 1kHz 97.5mV sine waveform is applied to TEL-line of the base, can the 1kHz sine waveform from the Q1 collector be fed? OK Check whether there is the 1kHz sine waveform at Pin13 of IC1. OK Check whether there is the 1kHz sine waveform at Pin9 of IC1. OK TX output signal from the base is detected by the liner detector, can the 1kHz 3kHz Dev. sine waveform be fed? OK Check whether there is the 1kHz sine waveform at Pin16 of IC501. OK Check whether there is the 1kHz sine waveform at Pin19 and 20 of IC501. OK Check whether there is the 1kHz sine waveform during for Pin1 and 2 of J501. OK NG NG Check IC501 and Pin17~20 peripheral circuits of IC501. NG Check IC501 and Pin15~16 peripheral circuits of IC501. NG NG Check IC1 and Pin9~11 peripheral circuits of IC1. NG Check IC1 and Pin13~14 peripheral circuits of IC1. NG Check the base TEL-line circuit and RELAY control circuit. NG See 3. The base and handset be cannot be connected.
