Bang & Olufsen Beocord 1800 Manuals

Bang & Olufsen Beocord 1800 Manuals

Manuals and User Guides for Bang & Olufsen Beocord 1800. We have 1 Bang & Olufsen Beocord 1800 manual available for free PDF download: Service Manual

Bang & Olufsen Beocord 1800 Service Manual

Bang & Olufsen Beocord 1800 Service Manual (124 pages)

Brand: Bang & Olufsen | Category: Tape Deck | Size: 27 MB

Table of Contents

Contents
2
Technical Data
3
Disassembly
7
Connecting Cables and Adaptors
8
Circuit Diagram
9
Functions
37
Microphone Input
37
Radio Input
37
Gramophone Input
37
Playback Amplifier
38
Record Amplifier
38
Monitoring Amplifier
38
Output Amplifier
39
Power Supply Section and Erase Oscillator
39
Photo-Electric Stop
39
Speaker
40
Wiring Diagrams
42
Replacement of Preamplifier Units
44
Sensitivities
47
Mechanical Function and Adjustment
49
PA Power Supply
49
Adjustment of Mains Switch in PA Operation
49
Power Supply Via Speed Selector
49
Speed Selector
50
Forward Tape Motion
51
Adjustment of Thrust Roller
51
Pause Control
52
Guide Plate with Tape Guide
52
Adjustment of Spring
52
Adjustment of Tape Pull
53
Tape Head Screens
53
Fast Forward
54
Fast Rewind
54
Adjustment of Fast Forward and Rewind
55
Adjustment of Guide Piece
55
Brakes
55
Brakes Adjustment
56
Turntables Adjustment
56
Height Adjustment of Turntables
56
Reel Lifting Arrangement (Take-Up)
57
Adjustment of Reel Lifting Arrangement
57
Slack Absorbers
58
Pushbutton Release
58
Automatic Stop
59
Adjustment of Trip Pin
59
Adjustment of Trip Relay
59
Adjustment of Tag
60
Adjustment of Tape Head Bridge
61
Adjustment of Tape Guides
61
Erase Head
61
Adjustment of Playback Heads
62
Adjustment of Record Head
64
Adjustment of Erase Heads
66
Electrical Adjustments
69
Adjustment of Supply Voltage
69
Adjustment of No-Signal Current
69
Motor Voltage Adjustment
70
Adjustment of Photo-Electric Stop (Reflection)
70
Adjustment of Photo-Electric Stop (Transillumination)
71
Adjustment of VU Meters
71
Adjustment of Before-The-Tape and Off-The-Tape Monitoring
72
Bias
72
Adjustment of 100 Khz Filters
73
Lubrication and Cleaning
75
Ditections for Fault-Finding
77
Voltage Measurements
77
Measuring with an Ohmmeter
77
Service Tips
79
Replacement of Mains Transformer
79
Mounting the Front Chassis
79
Replacement of Bearings
79
Modification
80
Replacement of Velvet Band for Tape Holding Mechanism
80
Output and Series Transistor
80
Hum on am Recordings
81
Noise on Tape
81
Whistles on am Recordings
81
Parts View
83
Parts List
84
Schematics and Pcbs
120

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