unit measured by DC electronic voltmeter (high impedance) and
oscilloscope on the basis of chassis. Accordingly, there may arise
some error in voltage values and waveforms depending upon the
internal impedance of the tester or the measuring unit.
- Importance safety notice :
Components identified by mark have special characteristics
important for safety. Furthermore, special parts which have
purposes of fire-retardant (resistors), high-quality sound
(capacitors), low-noise (resistors), etc. are used. When replacing
any of components, be sure to use only manufacturer's specified
parts shown in the parts list.
Caution !
IC, LSI and VLSI are sensitive to static electricity.
Secondary trouble can be prevented by taking care during repair.
- Cover the parts boxes made of plastics with aluminium foil.
- Put a conductive mat on the work table.
- Ground the soldering iron.
- Do not touch the pins of IC, LSI or VLSI with fingers directly.
11. Schematic Diagram
11.1. Power Circuit
11.2. Transformer Circuit and AC Inlet Circuit
11.3. Amplifier Circuit
12. Printed Circuit Board
12.1. Power P.C.B.
12.2. AC Inlet P.C.B. and Transformer P.C.B.
12.3. Amplifier P.C.B.
13. Wiring Connection Diagram
14. Illustration of ICs, Transistors and Diodes
15. Parts Location and Replacement Parts List
Notes:
- Important safety notice:
Components identified by mark have special characteristics
19
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