Technics SX-PX554, Руководство по обслуживанию

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Oscilloscope VP-5730A”. Therefore the waveforms of musical tone
signals shown may differ somewhat due to the difference in the timing
of triggering.
2. Since the 1/10 test probe is used, the indicated voltage value on the
bottom part of each waveform illustration is 1/10 of the actual value
(e.g. 0.2 V/cm should be 2.0 V/cm).
3. To measure the waveforms, first set this unit to the service diagnostic
mode (refer to “Wave ROM check on SELF-DIAGNOSTIC FUNCTIONS ”).
The WAVE ROM output will then be output as a sine wave to facilitate
the servicing check.
9.2. Important safety notice
- Components identified by a mark have special characteristics
important for safety.
- When replacing any of these components, use only manufacture’s
specified parts.
9.3. Symbolic marks
The symbolic marks for resistors and capacitors which used in this circuits are classified as following
Table-1 and Table-2 .
9.3.1. Resistors
- Resistors without symbolic mark are FIXED CARBON FILM RESISTORS
(ERD-type).
- All resistors are 1/4 WATT, ±5 % TOLERANCE unless otherwise
designated in schematic diagrams.
Table-1
15
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