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Philips CCS 800 Service Manual
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SERVICE MANUAL
LBB 3310/00, 3330/00 and 3331/00
page: 45
Date of issue:
4822 861 11006
July 1998
12.7
Block diagram chairman unit
LBB3331/x0 Chairman Uni
t CCS800
Audi
o distribution
Audio
con
t
ribu
tion
Contr
ol 2
Contr
ol 1
Supply positive
Supply negative
Ground
Audi
o distribution
Audi
o contribu
tion
Contr
ol 2
Contr
ol 1
Supply Positive
Supply negative
Ground
Trun
k in
Trun
k out
Head
phone 1
Head
phone 2
Ch
i
m
e
Volume
headphone
3
1
5
4
6
7
2
3
1
5
4
6
7
2
Mic. gain
preset
Logic
Priority Mic. on
Mic.
on
Chime ena
ble
preset
Mic.
ret
urn
preset
DC
DC
15V
5V
0V
47
49
Table of Contents
Default Chapter
3
Table of Contents
3
1 About this Manual
5
Important Safety Instructions
5
2 About this Equipment
5
3 Installation
5
4 Ordering Service Information
6
5 Introduction
6
6 Controls and Indicators
7
7 Technical Data
8
Cpsu
8
Delegate and Chairman Units
8
Power Supply
9
Additional Information
10
8 Microphone Stem Adjustment
11
9 Maintenance
12
10 Diagnostics/ Fault Finding
13
Functional Test
13
Brief Description of the Various Modes of the Chairman and Delegate Unit
14
Measuring Instructions for the CPSU (LBB3310/00)
15
Settings before You Start Measuring
15
Internal Supply Voltages
15
Phantom Supply of the External Symmetrical Microphone Input
15
Supply Current Measurement
16
AUDIO-CONTR to Loudspeaker Circuit
16
External Microphone Input to Line out (Balanced)
18
Audio-Contribution and Audio-Distribution Circuit
20
LINE-IN to TELEPHONE-OUT, LINE-OUT, INSERTION-OUT Circuit
22
REC-IN-L and REC-IN-R to REC-OUT Circuit
24
TELEPHONE-IN to LINE-OUT Circuit
26
The Mode Switch
27
Functional Test of the Mode Switch (S240)
28
Functional Test of System Volume Control (S260)
29
Measuring Instructions for the Delegate and Chairman Unit (LBB3330/00, LBB3331/00)
30
Supply Current
30
Internal Supply Voltages
30
Unit Presence
30
Unit Type
30
Microphone Switch and Light-Ring
31
Internal Signals for Delegate and Chairman Units
31
Internal Signals Only for Delegate Units
31
Priority Switch (Only for Chairman Units)
33
Measuring Spots with Signal Description
34
11 Spare Parts
35
General
35
Ordering Spare Parts/ Service Publications
35
Spare Parts List
35
12 Illustrations
39
Block Diagram CPSU
39
Exploded View CPSU
39
Layout CPSU
39
Circuit Diagram CPSU
39
Measuring Points CPSU
39
Block Diagram Delegate Unit
39
Block Diagram Chairman Unit
39
Exploded View Delegate/ Chairman Unit
39
Lay-Out Delegate Unit
39
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Philips CCS 800 Specifications
General
Brand
Philips
Model
CCS 800
Category
Microphone
Language
English
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