Dolby Laboratories CP500 Specifications Page 98
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- TROUBLESHOOTING
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9-6
To select one mic:
SK1 - SK4
To remove one mic:
SK1 - SK4 ⇒
⇒⇒
⇒
SK5
To resume scan:
SK8
Pressing any soft key, SK1 through
SK4, will halt scanning and enable the
corresponding microphone.
To remove a microphone from the scan
sequence, select the microphone by
pressing the corresponding softkey, then
press the Enable/Disable key (SK5).
Resume scanning by pressing Scan
(SK8).
NOTE
: This feature can be used to find out if one
microphone has accidentally been placed in an
acoustically unusual location that might adversely
affect the overall equalization. It can also be used to
identify failed microphones.
Calibration of the CP500’s measurement system for absolute level is done in the
same way as it is with no multiplexer.(See page 5-7.) Sound pressure levels can be
adjusted either with the multiplexer scanning or with a single microphone selected,
although equalization should always be done with the multiplexer in scanning mode.
The Real-Time Analyzer in the CP500 has been designed to always set the 800 Hz
1/3-octave band at the “0” line. Therefore, any variations in microphone sensitivity
or level in the room are automatically removed from the display, and only
equalization differences remain. This feature makes using a multiplexer for
equalization much easier since only frequency response differences are shown on
the display. Furthermore, the CP500 analyzer has slower display time constants --
graded according to frequency, than many commercial analyzers. This results in a
display that is more stable at low frequencies but still responsive at mid- and high
frequencies.
9.2.2 Components
Use the listed numbers for ordering replacement parts:
Cat. No. 580 Microphone Multiplexer Unit
Cat. No. 581 One Microphone with Adapter Cable
(Part Nos. 51031 and 83294)
Part No. 51031 Microphone
Part No. 83294 Microphone-to-MPX500 Adapter Cable, 6 meter (20')
Cat. No. 582 MPX500-To-CP500 I/O Cable, 31 meter (100')
- Film-Tech 1
- Model CP500 2
- Model CP500 3
- TABLE OF CONTENTS 4
- 1.1 About the Dolby CP500 10
- 1.3 About This Manual 11
- 1.4 Specifications 12
- 1.5 Regulatory Notices 14
- SECTION 2 16
- EQUIPMENT REQUIRED 16
- TEST FILM 17
- 3.1.2 While playing the film: 18
- 3.2 Mount the CP500 19
- 3.3 Connect the CP500 19
- (Models CP500-D, and -70) 20
- Figure 3 - 2 22
- Figure 3 - 3 22
- 3.4 Check and Set Jumpers 23
- CAT. NO. 683 25
- Appendix B, Cat. No. 683 26
- Model CP500-D 27
- Model CP500-D/300 28
- Model CP500-SR 28
- Model CP500-70 28
- 3.6 Bypass Power Wiring 29
- 3.7 Power On 30
- 4.1 The CP500 Front Panel 32
- 4.2 System Password 35
- 4.3 Aligning the B-Chain 36
- 5.1 Check Theater Equipment 38
- 5.2.2 Screen Channels 39
- B-Chain Alignment 40
- 5.3 Room Equalization 41
- “85 dBC” 44
- Reference 47
- Response 47
- CAT. NO. 682 52
- Cat. No. 682 card 53
- 6.1 Aligning the A-Chain 54
- LAMP VOLTAGE DC ADJUSTMENT 56
- OSCILLOSCOPE TRACES 60
- CAT. NO. 661 61
- P1, Left 62
- 7.1 Mechanical Alignment 66
- 2.7 to 5 volts 67
- Voltage Adjust 68
- 7.6 Optical Alignment 69
- Figure 7- 5 70
- 7.8 Film Threading 71
- 7.9 Cat. No. 673 72
- 7.11 Format Control 72
- Allowable Source Formats 75
- Allowable Target Formats 75
- How It Works 75
- Assigning Source Formats 76
- Assigning Target Formats 77
- Figure 7- 8 78
- 7.13.2 Print Cleanliness 79
- 7.13.3 Adjustments 79
- SECTION 8 80
- FINAL ADJUSTMENTS 80
- 8.2.1 Static 82
- 8.2.2 Dynamic 83
- 8.2.3 Typical Settings 83
- Width (feet) 84
- Width (meters) 84
- 8.4 Bypass Adjustments 85
- Position J900 to 86
- REMEMBER 87
- Format 04 Dolby Stereo 89
- Adjustments 90
- 8.5 About Non-sync 91
- 8.6 Mute Speed Adjustment 92
- Figure 9 - 1 93
- CAT. NO. 689 REMOTE 94
- 9.1.3 Auditorium Fader 95
- 9.2.1 Operation 96
- 9.2.2 Components 98
- 10.1 During the Show 99
- Surround Speakers 101
- Electronic Crossover: 101
- 10.2 Between Shows 102
- WARNING: 104
- 10.3 Troubleshooting Chart 105
- NO SOUND AT ALL 106
- NO SOUND IN SOME 107
- FADER PROBLEMS 108
- CONTROL PROBLEMS 108
- RUMBLES, WHISTLES 109
- HUM etc. IN SOUND 109
- TROUBLE IN ONE OR 110
- MORE CHANNELS 110
- CHANGEOVER AND 113
- CONTROL TROUBLES 113
- APPENDIX A 115
- ADVANCED OPERATIONS 115
- Cancel OK 116
- A.2 Saving System Settings 119
- Saving System Settings 120
- A.2.2 Using Load500 Software 125
- Connect to Load500 127
- Menu Cancel OK 130
- B.1 Description and Features 131
- B.2 Installation 131
- B.3 Alignment 132
- B.4 Special Applications 134
- B.5 Headers Available 135
- B.6 Jumpers and Headers 136
- APPENDIX C 138
- 9. Mic. Input Connector: 140
- System Setup Menu Tree 144
- Signal Block Diagram 144
- Basic Functions 145
- Auxiliary Data Channel 147
- Optical Sound 149
- Magnetic Sound 150
- Dolby Gets Involved 151
- The Next Step: Dolby SR 152
- And Now - Dolby Digital 152
- About Dolby AC-3 153
- Making Films Sound Better 153
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