Dolby Laboratories CP500 Specifications Page 106
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- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
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10-8
Symptom Probable Cause Recommended Action
NO SOUND AT ALL
No sound, front panel dark, no bypass
LED
No power to either main or bypass systems. See if mains panel fuse or circuit breaker feeding the CP500 is blown.
Verify all power connectors are fully inserted into their sockets. If
power is present, see if CP500 bypass transformer is installed correctly.
Verify that Cat. No. 682 card is fully seated in its connector.
Press main power switch (behind front door of CP500). If CP500 still
doesn’t come on, check fuse behind plastic door in power inlet module
on power supply housing.
No sound, and switching to Bypass
doesn’t restore sound.
No sound, front panel dark, red Bypass
LED is on and system is already in
Bypass
Defective exciter lamp or lamp power supply.
Projector selection wire/switch is faulty.
No signals coming from stereo solar cells.
Power amplifiers switched off.
Malfunction in the CP500.
Check that the exciter lamp is on and that the lamp power supply is
operating. If not, fade up background music and transfer the reel to the
alternative projector and continue the show until the exciter lamp can be
replaced. Call service engineer.
If the front panel indication (P1, P2) for the currently active projector is
not correct, check that the projector selector switch wiring is held firmly
under the screw terminals on the Phoenix connector on the back panel
of the processor. In addition, check that the switch is operating
properly.
Check that the signal present LEDs on the Cat. No. 661 optical preamp
are flashing while film is projected. If not, there is no signal from the
solar cells or the Cat. No. 661 has failed.
Check power feed to power amplifiers for blown circuit breaker or fuse
or accidental disconnection.
Substitute Cat. Nos. 661, 682, 683 (if so equipped). See block diagram
and earlier parts of the troubleshooting section.
No sound, front panel normal.
Above problems plus wrong format, system
muted, fader turned down. If fader display reads
“Au,” check where the auditorium fader is set.
Check same components as mentioned above. Then verify selected
format, mute status, and fader setting. If no formats produce sound, a
number of cards may be at fault. See block diagram and LED fault
tracing instructions.
- 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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