Lyrec TR532 Series, Manual

Page: 111 / 195

11.2
Subject:
To reduce hum.
Procedure:
1. Take out the tape deck control box by:
Unscrewing four screws at the rear of the box.
Open the tape deck to tilted position.
Remove: 2 connectors on the left side.
Remove: 3 connectors to the control printed circuit
board.
Remove: 1 connector at the bottom to the left.
Pull out the control box from the rear.
2. On the power stabilizer assembly (located on the reat
plate behind the mµ metal box with the power
transformers) change the resistor indicated on the
diagram from 0.68 ohms to 1.5 ohms.
Be sure to change the resistor connected to the
LM340K15, not the one connected to LM320K15.
3. Assemble in reverse order.
Be sure to connect all plugs correctly.
Extract of Diagram 9119/2
1977-11-01
TR532 11.2