BECKER 3300S Service Manual
Circuit diagram - Mercedes Benz MY98
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Blockdiagram
Main Board 4010 .................................................... 2
Connector
Connector block (Board 4040) .............................. 3
Connector interface (Board 4010) ......................... 4
Power supply
UG9V; UD5V; UG5V (Board 4010) ........................5
Tuner
FM-Tuner 1 (Board 4010) ...................................... 6
FM-Tuner 2 (Board 4080) ...................................... 7
FM-Peripherie (Board 4010) ................................. 8
AM-Tuner (Board 4010) ........................................ 9
AF-section
Audio controller and FM-Stereo decoder ............... 10
AF-amplifier (Board 4010).....................................11
CSD - Version: 36/99
Interface
d2b-optical (Board 4010) ...................................... 12
Wake up-Line, K-Line (Board 4010)...................... 13
Control
Processor (Board 4010) ........................................14
Shiftregister, EEPROM (Board 4010) ................... 15
CC-control, Dolby B/C (Board 4010) .....................16
Front
Front-Interface (Board 4010).................................. 17
Front-Processor, Keyboard Middle, right (9090) .... 18
Keyboard left (Board 9060) .................................... 19
Table of contents Circuit diagram 3300Audio 30 ECE DIN
Display (Board 9080) ............................................. 20
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1
Circuit diagram - Mercedes Benz MY98
CSD - Version: 36/99
AF-section
AF-amplifier
and
Connector-
interface
Interface
„d2b“
AF-section
Audio-
controller
Power
supply
Control
CC-Control,
Dolby B/C
Tuner
Peripherie
Tuner
FM
Tuner
AM
Front
„Interface“
Blockdiagram Main Board 4010
Interface
Shiftregister,
EEPROM,
Wake upline,
K-line
Control
P
BE
3300Audio 30 ECE DIN
2
2
Circuit diagram - Mercedes Benz MY98
CSD - Version: 36/99
B1 B3 B5
B2 B4 B6B7B8
A1 A3 A5
A4
A6A2
A7
A8
Chamber CChamber B Chamber A
C1 C3 C5 C7
C2 C4 C6 C8C9C10
Connector block
Chamber C
Chamber B
Chamber A
PIN
Chamber A Chamber B Chamber C
Speed
1
dependent Vol.
control
K-line
2
3
mute
C1 C3 C5 C7
C2 C4 C6 C8C9C10
B1 B3 B5
B2 B4 B6B7B8
A1 A3 A5
A4
A6A2
Loudspeaker
rear right +
Loudspeaker
rear right -
Loudspeaker
front right +
A7
Sicherung 10A
A8
not assigned
not assigned
not assignedTelephone
Terminal 30,
4
Battery
Control
5
output 12V
Battery 12V
6
Fuse
7
Ignition
Terminal 31,
8
Ground
9
Connector Connector block (Board 4040) 3300Audio 30 ECE DIN
Loudspeaker
front right -
Loudspeaker
front left +
Loudspeaker
front left -
Loudspeaker
rear left +
Loudspeaker
rear left -
Wake up line
Battery 12V
Fuse
Terminal 31,
Ground
not assignedTerminal 15,
not assigned
not assigned
not assigned10
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3
Circuit diagram - Mercedes Benz MY98
CSD - Version: 36/99
AF-section
Page 11
Connector Connector interface (Board 4010) 3300Audio 30 ECE DIN
BE
4
Circuit diagram - Mercedes Benz MY98
12V out
Voltage
control
CSD - Version: 36/99
UG9V
UG5V
UD5V
Tel.- Mute- input
GAL-input
Inverter -Ignation KL75-
Power supply UG9V; UD5V; UG5V (Board 4010) 3300Audio 30 ECE DIN
BE
5
Curcuit diagram - Mercedes Benz MY98
CSD - Version: 36/99
FM-Demodulator
Oszil.
FM-
Frontend
Tuner FM-Tuner 1 (Board 4010)
Synthesizer
BE
3300Audio 30 ECE DIN
6
6
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