Parts Identification ( con’t )
8. OUTPUT VOLUME
PT1801 comes with a built in Westminster chime. The output volume can be adjusted accordingly to suit the
requirement.
9. OUTPUT JACK
The chime output can be connected to pre-amplifier mixer with 1/4” unbalanced phone jack.
Note : Chime output is only available when CH8 is used as output channel.
General Schematic Diagram
O
I
amperes
MX2222
POWER
OFF
SELECT
TUNER
CD
CASS
OFF
MASTER
MUSIC SOURCE
SIG IN
BASS
MAX
MIN
EXT INPUT
MAX
MAX
MIN
SOURCE
MIN
SIG IN
CHIME
MIXER
TREBLE
MAX
MIN
TONE CTRL
CH5
CH6
CH4
SIG IN
SIG IN
SIG IN
MAX
MIN
MAX
MIN
MIN
CH3
CH1
CH2
SIG IN
SIG IN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
AUX
SIG IN
Paging Microphone
( Normal / Zone Selection )
Optional PC Interface
PT1801
Pre-Amplifier Mixer
Power Amplifier
Speaker Zone Selector
Speakers
Audio Output
(Balanced / Unbalanced )
Zone
Triggering
Zone Triggering ( optional )
or connect to Message Playback equipment
Mini USB
Cable
Audio output ( unbalanced )
Only when
Ch.8 is used
PAGE 3
PT1801 | MULTICHANNEL PROGRAMMABLE TIMER
a m pe re s
RELAY OUTPUT CONTACT
MELODY
