Technics SU-Z65 Service Manual

Mi PROTECTION CIRCUITRY
The protection circuitry may have operated if either of the following conditions is noticed:
@ Nosound is heard when the power is turned on.
@ Sound stops during performance.
The function of this circuitry is to prevent circuitry damage if, for example, the positive and negative speaker
connection wires are ‘‘shorted’’, or if speaker systems with an impedance less than the indicated rated impedance of the
amplifier are used.
If this occurs, follow the procedure outlined below:
1. Turn off the power.
2. Determine the cause of the problem and correct it.
3. Turn on the power once again.
Note:
When the protection circuitry functions, the unit will not operate unless the power is first turned off and then on again.
Mi DISASSEMBLY INSTRUCTIONS
1. How to remove the cabinet
(1) Remove the 4 setscrews on the side and back of the cabinet. [Fig. 1: @ ~ 0)
(2) Remove the cabinet from the chassis and rear panel as in Fig. 1.
Cabinet
Screw-driver
2. How to remove the bottom board
(1) Loosen the 2 setscrews [Fig. 1: @,@].
(2) Remove the 3 setscrews [Fig. 2: @ ~ @] of the
bottom board. [Screw @ is also used to fit the
front panel.]
(3) Remove the setscrew [Fig.1-1: @] of the printed
circuit board.
(4) Lift the back [rear panel] of bottom board and
remove claw ©) from the rear panel.
(5) Lifting the back of bottom board, insert a flat-head
screwdriver between the front chassis and bottom
board as in Fig. 3 in order to remove claw @).
(6) Remove the bottom board from the chassis.
Power transformer
{Fig. 1-1]

Technics SU-Z65 Specifications

General

Brand	Technics
Model	SU-Z65
Category	Amplifier
Language	English