* Do it yourself *
Index Home E-mail Photo-Albums Owner & Service manuals
Feedback from customers Orders & Information
Do it yourself Reel to reel for sale.
When ordering belts or taking a peek inside there are usually several different belts. This is a Sony TC-399 that's similar to model: TC-366, TC-377, TC-378 and TC-388.
(1)are the counterbelts, one long from the counter pulley up to the second pulley located next to the L- reel-table. Another shorter belt is then attached behind the reel-table from that pulley. (2)Drive-belt is attached from capstan-motor pulley to the left idler-wheel. When engaged on rewind the idler-wheel goes against L-reel-table and start rewinding. (3)Help-belt is the longest that goes around from a small pulley on the fly-wheel to a pulley behind the R reel-table. Function of this belt is feeding the tape to the right reel on play-mode. This belt is difficult too replace, because the whole mounting plate where the head-assembly is attached needs to come off. See picture below:
Sony TC-366 with the mounting plate and fly-wheel off.
(1) Left Idler-wheel. (2) Right Idler-wheel. (3) Pulley attached on the capstan-motor. (4) Flywheel. (5) Pinchroller.
(1) Automatic shut-off switch that engage the capstanmotor to stop when tape is ending. Sometimes this switch goes bad. (2) Erase-head. (3) Record head. (4) Playback head. The red arrows are tape-guides that also is important to keep clean, otherwise severe tape-flutter, damaged tape, slow speed on play, or sluggish rewind/fforward can be the result.
Similar models: Akai GX-4000D, 4000, 4000DS X-150, 1700, 1710, M-series. (1)Automatic-shutoff switch. When the small arm is lifted up treading the tape it's engaged with a small rod to the switch and sending voltage to the power-supply for the capstan-motor. This model has one-single motor and several idler-wheels. (2)Idler-pulley. When rewind is engaged the idler-wheel goes against this pulley. (3)Idler-wheel. For rewind function that goes against capstan-pulley + plastic idler-pulley. (4)Capstan-motor with attached pulley. (5)Idler-wheel for fast forward function and play-mode. (6)Tension-roller made of plastic (7)Track-selector switch that moves the headstack up and down depending which track is used. (8)Capstan-axel coming up from the fly-wheel and spin at certain speed from the drive-belt underneath. (9)Cam for play-function. (10)Cam for fforward-funtion. (11)Pause assembly.
(1)Drive-belt. Flat belt that goes around the fly-wheel and capstan-motor pulley. (2)Counter-belt. (3)Capstan-motor. (4)Fly-wheel. (5)Bracket for the fly-wheel and adjusting screw in the center. (6)Linkage for record-switch, this engage the record-switch located on the pc-board below. (7)Start capacitor for the capstan-motor. These need replacement sometimes on many Sony and Akai models. (8) Transformer.
About electronics and repairs: A big warning, there is high-voltage involved and I don't suggest anyone without the right knowledge and experience to repair electronic devices. The free of charge information on this website is provided "as is" without any warranty af any kind,expressed or implied, including limitation. The entire risk as to the quality and performance of this data is borne by you. Should any of this information prove defective, you and not me shall be liable for any special, exemplary or conseqvential damages resulting from use of this material. Readers are strongly advised to utilize safety precautions when working with electronics or electricity to avoid all potentioal hazards. The information contained herein has not been approved or endorsed by any of the manufactures mentioned in herein.
I have many used parts in stock for different brands and models.
Pictures © Vintage TX
