Entry Phone Adjustment Cd-2502 - Laskomex CD-2502 Series Installation, Service And Programming Manual

7 Entry phone adjustment CD–2502.
Elements of entry phone system are preliminarily adjusted and position of internal
potentiometers should not be changed without necessity.
Entry phone CD-2502 has the following adjustment elements (see dwg. 17):
P1 — volume control in external panel loudspeaker
P2 — volume control in uniphone loudspeaker (amplification of panel micro-
phone)
P3 — line balance responsible for the lack of acoustic interference
Potentiometers P1, P2 and P3 are placed in the electronic cassette.
P4 — amplification of microphone track in external panel (potentiometer in
external panel)
P1 — amplification of microphone track in uniphone (potentiometer is in uni-
phone)
a)
M
Figure 17: Control elements a) control amplification of microphone in panel, b) control elements
in entry phone cassette
Volume control in external panel
If necessary, the volume of speaker in the external panel can be adjusted by
potentiometer P1 which is placed in electronic cassette (gain adjust of a signal
coming from the uniphones).
Gain adjust of microphone track in external panel
If necessary, the sensitive of microphone track can be adjusted by potentiome-
ter P4 in external panel or potentiometer P2 (microphone) in electronic cassette.
However it is recommended to adjust only by potentiometer P2 in electronic cas-
sette. If the results will not be satisfy then adjust potentiometer P4 (position of
potentiometer's knob should be at the maximum position).
K
P4
K1
K2
K3
K4
K5
K6
G
J
J
D
P1
7 ENTRY PHONE ADJUSTMENT CD–2502.
P2
b)
- +
MICROPHONE SPEAKER
Kaseta elektroniki
EC-2502
ul. Nowa 20, 90-031 £ódŸ,
tel. (0-42) 672 44 00, fax 672 44 45,
DATA:
e-mail: laskomex@laskomex.com.pl,
http://www.laskomex.com.pl
RESET MIKROFON BALANS G£OŒNIK
CP-2500
A/B
26
P1
P3
- +
- +
BALANCE