Technics RSB 605 Service Manual

Page 2

l CONTENTS.

0 Safety Precaution..
. Accessorles ........
- How to Connection
- Location of Controls
- Dlsassembly Instructions.
- Measurement and Adjustment Methodes
- Microcomputer Terminal Function

and Waveform .............................................. 9~15
- Terminal Gulde of ICs.
Transistors and Diodes ..................... . 15

- Replacement Parts List (Electrical Parts)

Page
0 Resistors & Capacltors ....................................... 17, 18
0 Block Dlagram ............ ., 19, 20
v Printed Circuit Board 21~24
. Schematic Diagram... 25~31
0 Replacement Parts List (Mechanical Parts). 32

- Mechanical Parts Location. . 33. 34
- Cabinet Parts Location... - 35, 36
- Wiring Connection Diagram . 37

. Replacement Parts List (Cabinet,
Packings and Accessories Parts) ................... 38

I SAFETY PRECAUTION (This safety precaution applies only in U.S.A.)

. Before servicing, unplug the power cord to prevent an electric shock.

. When replacing parts, use only manufacturers recommended components for safety.

. Check the condition of the power cord. Replace if wear or damage is evident.

. After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields, etc.

Before returning the serviced equipment to the customer, be sure to make the following insulation resistance test to
prevent the customer from being exposed to a shock hazard.

macaw--

INSULATION RESISTANCE TEST

1. Unplug the power cord and short the two prongs of the plug with a jumper wire.

2_ Turn on the power switch.

3. Measure the resistance value with ohmmeter between the jumpered AC plug and each exposed metal cabinet part, such as
screwheads antenna, control shafts. handle brackets, etc. Equipment with antenna terminals should read between 3M9
and 5.2MS'2 to all exposed parts. (Fig. A) Equipment without antenna terminals should read approximately infinity to
all exposed parts. (Fig. B)

Note: Some exposed parts may be isolated from the chassis by design. These will read infinity,

Antenna
terminal \

Exposed Exposed
metal metal
part part
Ohmmeter Ohmmeter
(Fig-A) (Fig.3)

Resistance = BMQ-Sz MQ Resistance = Approx 00

4. If the measurement is outside the specified limits, there is a possibility of a shock hazard. The equipment should be
repaired and rechecked before it is returned to the customer.