Dolby Laboratories CP500-300 Specifications Page 100
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10-3
10.1.5 Excessive or Inappropriate Sound From
Surround Speakers
1. As an emergency measure to continue the show, switch off the surround
channel power amplifier(s). At your next opportunity, find out if the problem is
related to the film itself or the theater sound system.
The problem is most likely to be in:
• Power amplifier gain settings;
• Damaged loudspeakers rattling, etc.;
• Solar cell alignment in the projector (if the problem is analog sound);
• Cat. No. 661 optical preamplifier card (if the problem is analog sound);
• Cat. No. 222 SR/A or Cat. No. 300 (if so equipped) Noise Reduction
cards (if the problem is analog sound).
10.1.6 On CP500s Equipped with Cat. No. 683
Electronic Crossover:
This optional board is located in the first slot on the left hand side of the unit.
No High Frequency Or Low Frequency Output
Possible causes are
• A high frequency driver speaker driver has failed.
• A low frequency speaker has failed.
• A power amplifier has failed.
• A power amplifier fuse has failed.
• The Cat. No. 683 card may have failed.
High frequency driver failures are the most common cause of this problem.
If it appears that the Cat. No. 683 card is the cause of the problem, open the front
door of the CP500 and switch to Bypass using the pushbutton switch in the lower
right corner. A separate speaker crossover system is provided for Bypass operation;
however, the sound will be in mono only.
- Model CP500 1
- Model CP500 2
- TABLE OF CONTENTS 3
- 1.1 About the Dolby CP500 9
- 1.3 About This Manual 10
- 1.4 Specifications 11
- 1.5 Regulatory Notices 13
- SECTION 2 15
- EQUIPMENT REQUIRED 15
- TEST FILM 16
- 3.1.2 While playing the film: 17
- 3.2 Mount the CP500 18
- 3.3 Connect the CP500 18
- (Models CP500-D, and -70) 19
- Figure 3 - 2 21
- Figure 3 - 3 21
- 3.4 Check and Set Jumpers 22
- 1.9 mSEC 1.9 mSEC 1.9 mSEC 24
- Appendix B, Cat. No. 683 25
- Model CP500-D 26
- Model CP500-D/300 27
- Model CP500-SR 27
- Model CP500-70 27
- 3.6 Bypass Power Wiring 28
- 3.7 Power On 29
- 4.1 The CP500 Front Panel 31
- 4.2 System Password 34
- 4.3 Aligning the B-Chain 35
- Amplifiers 37
- Air-conditioning 38
- B-Chain Alignment 39
- POWER AMPS 40
- “85 dBC” 43
- Cat. No. 682 card 52
- 6.1 Aligning the A-Chain 53
- LAMP VOLTAGE DC ADJUSTMENT 55
- OSCILLOSCOPE TRACES 59
- CAT. NO. 661 60
- P1, Left 61
- P1, Right 62
- Projector 1 64
- 7.1 Mechanical Alignment 65
- 7.3 Focus Adjustment 66
- Figure 7- 2 67
- Figure 7- 3 68
- Figure 7- 4 68
- CCD Circuit Board 68
- Figure 7- 5 69
- 7.8 Film Threading 70
- 7.9 Cat. No. 673 71
- 7.11 Format Control 71
- Allowable Source Formats 74
- Allowable Target Formats 74
- How It Works 74
- Assigning Source Formats 75
- Assigning Target Formats 76
- Figure 7- 8 77
- 7.13.2 Print Cleanliness 78
- 7.13.3 Adjustments 78
- SECTION 8 79
- FINAL ADJUSTMENTS 79
- 8.2.1 Static 81
- 8.2.2 Dynamic 82
- 8.2.3 Typical Settings 82
- Width (feet) 83
- Width (meters) 83
- 8.4 Bypass Adjustments 84
- REMEMBER 86
- Format 04 Dolby Stereo 88
- REMEMBER: 89
- Figure 8-2 90
- Figure 9 - 1 92
- CAT. NO. 689 REMOTE 93
- Selection 94
- 9.2.1 Operation 95
- 9.2.2 Components 97
- 10.1 During the Show 98
- Surround Speakers 100
- Electronic Crossover: 100
- 10.2 Between Shows 101
- WARNING: 103
- 10.3 Troubleshooting Chart 104
- NO SOUND AT ALL 105
- NO SOUND IN SOME 106
- FADER PROBLEMS 107
- CONTROL PROBLEMS 107
- RUMBLES, WHISTLES 108
- HUM etc. IN SOUND 108
- TROUBLE IN ONE OR 109
- MORE CHANNELS 109
- CHANGEOVER AND 112
- CONTROL TROUBLES 112
- APPENDIX A 114
- ADVANCED OPERATIONS 114
- Cancel OK 115
- Equipment Needed 118
- Saving System Settings 119
- Connect to Load500 124
- Menu Cancel OK 129
- B.1 Description and Features 130
- B.2 Installation 130
- B.3 Alignment 131
- B.4 Special Applications 133
- B.5 Headers Available 134
- B.6 Jumpers and Headers 135
- 1. Automation Connector: 137
- 2. Serial Data Connector: 137
- 3. Motor Start Connector: 137
- 9. Mic. Input Connector: 139
- System Setup Menu Tree 143
- Signal Block Diagram 143
- Basic Functions 144
- Auxiliary Data Channel 146
- Optical Sound 148
- Magnetic Sound 149
- Dolby Gets Involved 150
- The Next Step: Dolby SR 151
- And Now - Dolby Digital 151
- About Dolby AC-3 152
- Making Films Sound Better 152
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