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TRC-70
CIRCUIT DESCRIPTION
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Fig. 14 Dimmer circuit
1C300
R363
* Tone output
pp7
on
M—e-—> ALM
The 1500 Hz tone by the TONE SW is output by
| 2K
$ |
= 3
generating
a pseudo sine wave
by D/A output and
PDs
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passing it through the LPF. This tone has a step wave-
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form with a 1/11 cycle.
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7
PDS
l MM
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=
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PD4
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it
PD3
AM
|
PD2
Ww-
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PDI
W-
:
PDO
: Wy
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cS
Lj
15
Fig. 15 Tone output circuit
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