A site where discontinualed schematic diagrams and back dated information can be found on discontinued radios tv's and any electronic equipment can be found. Newer manuals either Service and operating manuals. Radio amateurs should find this site a great source for ham radio equipment manuals. I will return to this site should I need information on any electrical equipment. priced easy to download in a PDF format and print pages need to undertake the repair.
some of the writing is a bit blur but the part in the schmatic was great and i have fixed the machine thanks
Text excerpt from page 6 (click to view)
A MAIN C.B (BOTTOM VIEW)
SFR1 (2.4cm) SFR3 (1.2cm) J1 EAR PHONE
J4 DC3V 2 RPH
S4 TAPE SPEED 1.2 2.4 3
1. Head Azimuth Adjustment Setting: â¢ Test tape: TTS-930 â¢ Tape speed: 2.4 cm â¢ Adjustment point: Head Azimuth Adjustment screw Method: Playback the 5 kHz signal of the test tape (TTS-930) and adjust screw so that the output becomes maximum. 2. Tape Speed Adjustment (2.4cm) Setting: â¢ Test tape: TTS-900 â¢ Volume: MAX â¢ Adjustment point: SFR1 Method: Playback the test tape (TTS-900) and adjust SFR1 so that the tape speed is become 3000 Â± 10Hz. 3. Tape Speed Adjustment (1.2cm) Setting: â¢ Test tape: TTS-910 â¢ Volume: MAX â¢ Adjustment point: SFR3 Method: Playback the test tape (TTS-910) and adjust SFR3 so that the tape speed is become 3000 Â± 90Hz.
PRACTICAL SERVICE FIGURE
Tape speed: Wow & flutter: Take-up torque: F.F torque: Rew torque: Back tension: S/N ratio: Noise level: Erasing ratio: Test tape: 3000 Hz Â± 90 Hz Less than 0.65% (RMS) (2.4cm) Less than 0.65% (RMS) (1.2cm) 4 ~ 12 g-cm 30 ~ 150 g-cm 25 ~ 60 g-cm Less than 1.3 g-cm More than 50 dB (DC. PB) More than 26 dB (DC. R/PB) Less than 1.7 mV (DC.Vol Max. PB) Less than 18 mV (DC. Vol Max. R/PB) More than 40 dB (1 kHz) TTS-900 (Wow & flutter/Tape speed â 2.4 cm) TTS-910 (Wow & flutter/Tape speed â 1.2 cm) TTS-920 (Distortion/Output) TTS-930 (Azimuth) TTS-940 (REC/PB)