Dolby Laboratories CP650 Installation Manual Page 114
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- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
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CP650 Troubleshooting Chart Maintenance and Troubleshooting
9-6
Symptom Probable Cause Recommended Action
NO SOUND IN SOME
FORMATS
No analog film sound (formats 01, 04, or
05). Front panel normal, Dolby Digital
sound OK, and nonsync OK.
The analog LED or exciter lamp or power supply may
have failed or the wrong projector may be selected.
Solar cell connections may be loose or damaged.
The remote solar cell preamp board used with LED
analog readers may have failed.
If the signal-presence LEDs inside the access door are not
flashing, verify exciter operation and solar cell connections
as described above. Substitute known working
Cat. No. 772B board.
No Dolby Digital sound (format 10).
Front panel normal, analog sound OK.
Digital reader LED not working, Dolby Digital decoder
board Cat. No. 773 not installed or not working, Dolby
Digital print not being played, film not threaded correctly
in reader, reader failure.
Verify that the LED (or exciter lamp) in the digital film
reader is on. Verify that the print you are playing is
correctly threaded through the digital reader and that it
includes Dolby Digital information. If the CP650 accepts a
format 10 command, the digital subsystem is probably still
working.
No sound on external six-track input
(format 11, 70 mm, external Dolby Model
DA20, or other multichannel sound
sources), front panel normal.
Cat No. 772B board defective. Wrong format, external
device not receiving good data. Six-channel input
connector not fully plugged in.
Check external device for audio output. Reseat the six-
channel connector.
No sound in nonsync.
Nonsync source not working, nonsync level set too far
down, faulty Cat. No. 772B board. If nonsync is a user
format, is the input from Nonsync 1 or Nonsync 2?
Which channels are the signals being sent to? Are those
power amplifiers working?
Verify output of nonsync source. Determine from front-
panel display which channels the output is directed to and
verify that power amplifiers and speakers for those
channels are working. After checking the above, adjust
nonsync level in setup, changing both Left and Right
channels by equal amounts.
Power button illuminated. Front panel
dark. There is sound.
System is in Bypass mode.
Turn on the CP650 with the front-panel power button. Call
service engineer if the system is still not operating
correctly.
- Digital Cinema Processor 1
- Installation Manual 1
- Dolby Laboratories, Inc 2
- Table of Contents 3
- CP650 Installation Manual 4
- List of Figures 6
- List of Tables 7
- Regulatory Notices 8
- CP650 Installation Manual 11
- Chapter 1 13
- Introduction 13
- Dolby Digital 18
- Surround EX mode 18
- 1.4 Specifications 19
- 2.1 Check Main Fuse 21
- 2.3 Mount the CP650 22
- 2.5 Connect the CP650 23
- 2.5.2 Remote Controls 24
- 2.5.5 Digital Audio Sources 28
- For Cat.No. 778 29
- For Cat.No. 794 29
- CP650 INSTALLATION WIRING 33
- INPUT AND CONTROL CONNECTIONS 33
- AUDIO OUTPUT CONNECTIONS 35
- CP650DCXO INSTALLATION WIRING 38
- Chapter 3 41
- 3 1/3 db 45
- 3.2 The Setup Control Panel 47
- Chapter 4 51
- B-Chain Alignment 51
- 4.2 Microphone Placement 52
- 4.3 Initial Setup 53
- OK to save this setting 54
- Mic Level Too Low 55
- Proceeding 55
- Uncalibrated 55
- 4.5.1 Main Channels 56
- 4.5.2 Subwoofer Channel 57
- Cat. No. 791 58
- Screen Loss 58
- Filter Jumpers 58
- Crossover Mode 59
- >3 Way 59
- Le / Re Channels 59
- Disabled 59
- OK to save 62
- 4.7 Room Equalization 63
- 4.7.2 Setting Coarse EQ 64
- 4.7.3 Setting Fine EQ 65
- 4.7.4 The EQ Assist Feature 66
- Digital Subwoofer 68
- >Level: xx 68
- Polarity: Normal 68
- Center Noise: Off 68
- OK to save the selection 69
- 123 7456 8 70
- Chapter 5 71
- A-Chain Alignment 71
- 5.1 Projector Checkup 72
- 5.3 Dolby Level Set 74
- 5.3.2 Manual 75
- 5.5 Cell Alignment Check 76
- 5.6 Cell Wiring Check 77
- 5.7 Azimuth Check 77
- 5.8 Focus Check 78
- 5.9.1 Auto Slit-Loss EQ 79
- 5.9.2 Manual Slit-Loss EQ 79
- OK to save the settings 80
- Chapter 6 81
- Digital Soundheads 81
- 6.3 Focus Adjustment 82
- 6.4.1 Cat. No. 702 Reader 83
- 6.4.2 Cat. No. 701 Reader 84
- Chapter 7 85
- Final Adjustments 85
- OK to save the setting 86
- Digital Surround 88
- > xxx mSec 88
- 7.8 Mono Level Trim 92
- 7.9 Mono EQ Adjustment 92
- Front-Panel Buttons 92
- Button Presets 93
- Button 01 93
- Fader: 6.5 93
- >Delay: 0—170 mSec 93
- 7.13 Reversion Mode 94
- 7.15 Noise Gating 94
- 7.16.3 Fail Parameters 97
- L M1 0 99
- 7.17 Dialogue Normalization 100
- 7.18 Network Configuration 100
- 7.19 Clock Set 101
- 7.20 Date Set 101
- Chapter 8 103
- Accessories 103
- 8.1.1 Remove the Housing 104
- Top View 105
- 8.1.5 Assemble the Unit 106
- 8.1.6 Connect to the CP650 107
- Chapter 9 109
- 9.3 CP650 Troubleshooting 110
- Bypass Fuse 111
- 9.3.3 The Event Log 112
- 9.3.4 Troubleshooting Chart 112
- NO SOUND AT ALL 113
- NO SOUND IN SOME 114
- FORMATS 114
- FADER PROBLEMS 115
- CONTROL PROBLEMS 115
- RUMBLES, WHISTLES 116
- HUM IN SOUND 116
- TROUBLE IN ONE OR 117
- MORE CHANNELS 117
- CHANGEOVER AND 120
- CONTROL TROUBLES 120
- CP650 POWER SUPPLY WIRING 122
- CAT.NO.776-5 (GOLD COVER) 122
- CAT.NO.776-2 (GOLD COVER) 124
- Cat. No. 702 Exploded View 125
- Cat. No. 702 REAR VIEW 126
- F11504A_2.CDR 127
- Cat. No. 700 / 701 REAR VIEW 128
- Appendix A 129
- Software Operations 129
- A.2 Updating CP650 Software 130
- Appendix B 133
- Rear-Panel Connectors 133
- B.2 Input Connectors 136
- B.3 I/O Connectors 140
- Appendix C 143
- Format Descriptions 143
- C.2 Format Definitions 144
- Cat. No. 778 AES1 153
- Appendix D 155
- External Control 155
- Key Range of Values Notes 156
- Serial Data 157
- Remotes and Aud. Fader 158
- Appendix E 161
- Setup and User Menus 161
- + = 161
- = Bypass/Normal toggle 163
- (Cat. No. 778 only) 164
- E.2 CP650 User Menu 165
- DIP switch 6 Down 165
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