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© 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved GD-1150/1151/1200/1201/1160/1260
ELECTRICAL CIRCUITS
4 - 17
4
The relation between the signals and sound volume is as follows.
The monitoring signal whose volume is controlled by IC9[IC2] is amplified by the OP amplifier (IC10
[IC1]), then output to the speaker.
* Values in [ ] are for GD-1151/1201 in case that the descriptions vary between GD-1150/1200 and
GD-1151/1201.
Sound volume VOLSEL2 VOLSEL1 VOLSEL0
Max. (7) LOW LOW LOW
(6) LOW LOW HIGH
(5) LOW HIGH LOW
(4) LOW HIGH HIGH
(3) HIGH LOW LOW
(2) HIGH LOW HIGH
Min. (1) HIGH HIGH LOW
Silent (0) HIGH HIGH HIGH
Signal Name Type Active Description Destination
SP-SEL O H Line/Tone Selection Signal IC3
MON O H Ring/Tone Selection Signal IC3
VOLSEL0-2 O H Speaker Volume Control Signals 0-2 IC9 [IC2]
08/03