Philips CCS 800 Service Manual page 19

Nominal level, maximum level and bandwidth
Connect successively a sine-wave generator to the left and right external microphone input connections, ("MIC-IN+"
(M131) and "MIC-IN-" (M132) ) related to GND (M133) according to figure 5.
NOTE: be sure that the gain control potentiometer (R140) of the external microphone input is set to the middle
position.
G1
+
mic-IN+
Sine-Wave
Generator GND
-
G1
+
mic-IN-
Sine-Wave
GND
Generator
-
Nominal level
Maximum level
Bandwidth
Bandwidth
Mute level: set S240 to chairman
only mode
Set S240 back to position AUTO 1.
LBB 3310/00, 3330/00 and 3331/00
4822 861 11006
90 ... 264V AC
~ ~
Power Supply
AC
24V DC
X10
Ext. mic
Input
X130 R140
2
M131
1
M133
(GND)
M110 M111
X110 6 9
Line-IN
Ext. mic
Input
X130
3
M132
1
M133
(GND)
M110 M111
X110 6 9
Line-IN
settings for G1
Amplitude
-56 dBV (1.6 mVrms)
-31 dBV (28.2 mVrms)
-56 dBV (1.6 mVrms)
-56 dBV (1.6 mVrms)
-56dBV (1.6 mVrms)
PCB CPSU
Loudspeaker
X205 M119
25Ω
(GND) (GND)
M121 M122 M124 M150 M151
4 8 2 7 2 5
Rec-IN Rec-IN Telephone
L R IN
M1
R
Figure 5
Frequency
1 kHz
1 kHz
125 Hz
12.5 kHz
1 kHz
page: 17
SERVICE MANUAL
A1
+
V
M2
-
X150
003_005.cdr
measurement results for A1
Amplification
-15 dBV +/- 2dB (85dB SPL)
+10 dBV +/- 2 dB (110 dB SPL)
-3dB +/- 2dB related to nom. level at
1kHz
-1dB +/- 1dB related to nom. level at
1kHz.
< -74 dBV (selective) or < -74 dBV (A-
weighted)
Date of issue:
July 1998