BECKER 3301 Service Manual
Circuit diagram - Mercedes Benz MY98
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 (Board 4010) ........................................6
FM-Peripherie (Board 4010) .................................7
AM-Tuner (Board 4010) ........................................8
AF-section
Audio controller and FM-Stereo decoder (Board 4010) 9
AF-amplifier (Board 4010).....................................10
CSD - Version: 26/99
Interface
d2b-optical (Board 4010) ......................................11
Wake up-Leitung, K-Leitung (Board 4010)............12
Control
P-control (Board 4010)........................................13
Shiftregister, EEPROM (Board 4010) ...................14
CC-Steuerung, Dolby B/C (Board 4010) ...............1 5
Front
Front-Interface (Board 4010)..................................16
Front-P, Keyboard central and right (Board 9090)17
Tastatur links (Board 9060)....................................1 8
Display (Board 9080) ............................................. 19
Table of contens Circuit diagrams 3301Audio 30 DIN Export
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1
Circuit diagram - Mercedes Benz MY98
CSD - Version: 26/99
AF-section
AF-amplifier
and
Connector-
interface
Interface
„d2b“
AF-section
Audio-
controller
Power
supply
Control
CC-Control,
Dolby B
Tuner
Periphery
Tuner
FM
Tuner
AM / WB
Front
Interface
Blockdiagram Main Board 4010
Interface
Shiftregister,
EEPROM,
Wake up-line,
K-line
Control
P
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3301Audio 30 DIN Export
2
2
Circuit diagram - Mercedes Benz MY98
CSD - Version: 26/99
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
2
Telephone
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 +
Fuse 10A
A7
A8
not assigned
not assignedK-line
not assigned
4
Battery
Control
5
output 12V
Battery 12V
6
Fuse
7
Ignition
8
Ground
9
Connector Connector block (Board 4040) 3301Audio 30 DIN Export
Loudspeaker
front right -
Loudspeaker
front left +
Loudspeaker
front left -
Loudspeaker
rear left +
Loudspeaker
rear left -
Wake up lineTerminal 30,
Battery 12V
Fuse
Terminal 31,
Ground
not assignedTerminal 15,
not assignedTerminal 31,
not assigned
not assigned10
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3
Circuit diagram - Mercedes Benz MY98
CSD - Version: 26/99
AF-section
Page 10
Connector Connector interface (Board 4010) 3301Audio 30 DIN Export
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4
Circuit diagram - Mercedes Benz MY98
12V out
Voltage
control
CSD - Version: 26/99
UG9V
UG5V
UG9V
Tel.- Mute- input
GAL-input
Inverter -Ignition KL75-
Power supply UG9V; UD5V; UG5V (Board 4010) 3301Audio 30 DIN Export
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5
Circuit diagram - Mercedes Benz MY98
CSD - Version: 26/99
Tuner FM-Tuner (Board 4010)
Synthesizer
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3301Audio 30 DIN Export
6
6
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