Thomson DK 700 T Belt Replacement

Using a Phillips PH2 screwdriver, remove the 4 screws located on the sides of the cover.

With the 4 screws removed, slide the cover toward the back by about 1 to 2 cm, then lift it up.

The device is open.

The power switch (220V).

The power transformer.

The power fuses (2 glass 1.6 A 5 x 20 mm fuses).

Analog VU meter block.

Cassette player/recorder block.

Auxiliary input/output board and sockets.

Disconnect the three white connectors located on the back of the cassette player/recorder.

Although the connectors have a snap fit, they disconnect quite easily by pulling with your fingers, or by using bent-nose pliers.

For the one on the bottom left, bent-nose pliers make the task easier.

Disconnect the two recording/playback head and erase head connectors with your fingers or bent nose tweezers.

Using flush cutters, cut the cable ties of the cables you just disconnected.

Remove the PH1 Phillips screw securing the automatic stop board.

Remove the board and move it out of the way of the reader/recorder assembly.

Remove the (white) snap fit from the button pin by prying it with a sharp tool inserted into the accessible hole. The snap fit comes off very easily. Using a tool is not strictly necessary.

Remove the button and its pin by sliding it out of its housing on the front of the device.

Using a size 1.2 flathead screwdriver, remove the circlip connecting the cassette door flap to its opening brake.

Open the cassette door.

Unclip the front panel of the door by lifting it with your index fingers, using your thumbs to provide leverage on top of the door.

Remove the five Phillips PH2 screws.

Spread the white connectors toward the back and place the three gray read/write and erase head cables toward the front of the device.

Remove the tape drive assembly from the frame by pulling it back one to two centimeters, then lifting it from the rear.

Front view.

Top view. Read/record head. If its removal is not necessary, do not do it, because the left screw is used to adjust the azimuth of the head relative to the tape to obtain the maximum amplitude signal on both the left and right channels.

Top view. Erase head.

Rear view. Counter drive belt.

Rear view. Flywheel drive belt.

Open the cassette door flap by pressing the release lever with your thumb, while holding it with your index finger to prevent it from opening too abruptly.

Remove the two PH1 Phillips screws from the plate located on the left side of the cassette door flap.

Remove the left side plate by sliding it downward and to the right.

A small return hairpin spring comes off with the plate. This spring is fragile. Do not forget it during reassembly.

Remove the cassette door flap by disengaging it from the pin on the right side plate.

Remove the four Phillips PH1 screws from the mobile deck guides (deck with the two heads and the pinch roller).

Gently lift the deck.

Unhook the spring from the frame and place the deck next to the frame.

Remove the belt from the counter drive pulley and the take-up reel pulley.

Counter pulley.

Take-up reel (it receives the magnetic tape from the cassette after playback, recording, or erasure by the heads).

Remove the two PH1 Phillips screws from the bracket located under the drive/recorder assembly, then remove the bracket.

Remove the two PH1 Phillips screws located on top of the plate that holds the flywheel in place (with the adjustable bearing).

Remove the PH1 Phillips screw located on the side.

Remove the belt from the motor pulley.

Remove the PH1 Phillips screw securing the motor locking tab and remove the tab.

Rotate the motor counter-clockwise, remove it from its housing, then slightly lift the plate to access the belt on the flywheel side.

Remove the belt.