Crown Macro-Tech 5002VZ Manuel de service Page 31
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- Table des matières
- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
Maintenance 5-3
130446-1 Rev. A
MA-5002VZ Service Manual
©2000 Crown International, Inc.
Indicator Condition
ODEP One OFF
SPI/IOC Both OFF
ILOAD/ILIMIT Both OFF
STBY Both OFF
OV/THERM Both OFF
DC/LF Both OFF
OUTPUT MOD Both OFF
ODEP One OFF
SPI/IOC Both OFF
ILOAD/ILIMIT Both OFF
STBY One/Both ON
OV/THERM Both OFF
DC/LF Both OFF
OUTPUT MOD Both OFF
ODEP Both OFF
SPI/IOC Both OFF
ILOAD/ILIMIT Both OFF
STBY Both OFF
OV/THERM Both ON
DC/LF Both OFF
OUTPUT MOD Both OFF
ODEP One OFF
SPI/IOC Both OFF
ILOAD/ILIMIT Both OFF
STBY Both OFF
OV/THERM One ON
DC/LF Both OFF
OUTPUT MOD Both OFF
ODEP One OFF
SPI/IOC One ON
ILOAD/ILIMIT Both OFF
STBY Both OFF
OV/THERM Both OFF
DC/LF One ON
OUTPUT MOD Both OFF
Cause
At any time the main relay is off (open), the ODEP indicator is also
held off. Any protective action which will result in amplifier shut-
down will cause the ODEP indicator on the affected channel to be
off. The ODEP indicator will also be off when the amplifier is into
“full ODEP” limiting. Under the initial conditions described, the
conditions in the left column will only occur when there is a failure
in one relay or relay control circuit, in the ODEP circuit itself, or in
a thermal sensor for the ODEP circuit.
An ODEP indicator off coupled with one or both internal STBY
indicators lit is most often caused by low line voltage. It may also
be caused by placing a logical low on a RS (remote standby func-
tion) connection to the PIP module. First, verify AC mains voltage
and check the amplifier to ensure it is wired for the appropriate
AC mains. The RS port from the PIP module is not likely to be at
fault, but if an IQ-PIP is installed, it may be necessary to replace it
with a blank module (such as the PIP2-FXQ) for testing purposes.
Both ODEP indicators off coupled with both internal OV/THERM
indicators lit is most often caused by high line voltage (>10% above
what the amplifier is wired for). It is extremely unlikely that the
thermal switches in both amplifier channels will be activated. First,
verify AC mains voltage and check the amplifier to ensure it is
wired for the appropriate AC mains. If fans are running at full speed,
a transformer thermal condition is probably being stimulated by a
failed IC such as U707.
One ODEP indicator off coupled with one internal OV/THERM in-
dicator lit will result from an open thermal switch in the toroid of
the affected channel. Except for very early units with control mod-
ule Q42930-0, fans should both be operating at high speed. If
they are, a thermal switch is in fact open. If fans are off or nearly
off (and control module is Q43096-9 or later), the problem is more
likely a failed Q709 (Ch 1) or Q707 (Ch 2).
One ODEP indicator off coupled with IOC and DC/LF indications
indicates a DC offset at the amplifier's output. The amplifier may
attempt to cycle if a small offset is being caused by a malfunction.
This may not be the direct result of an output device failure. It may
rather be caused by a grossly maladjusted or faulty balance con-
trol within the amplifier. It may also be caused by any number of
minor components failing in an unexpected manner. It could also
be the result of an unbalanced ODEP circuit (±ODEP bias poten-
tials unequal). If the DC/LF indication remains locked in, the OUT-
PUT MOD Fault circuit may be activated, but on occasion the DC/
LF circuit will trigger faster causing this indication. Observe the
output with a scope to determine if cycling action is in fact occur-
ring.
- SERVICE MANUAL 1
- Macro-Tech® 1
- Revision History 3
- Table of Contents 5
- 1 Introduction 7
- 1-2 Introduction 8
- 2 Specifications 9
- ±10 millivolts 10
- 2-4 Specifications 12
- 3 Voltage Conversion 13
- INSTRUCTIONS 13
- 3-2 Voltage Conversion 14
- 4 Circuit Theory 15
- 4-2 Circuit Theory 16
- 4.2.2 Output Stage Circuitry 17
- 4.3 VZ Power Supply 18
- 4.3.2 VZ Supply Circuitry 19
- 4.4 ODEP Theory 20
- On Main ModuleOff Main 21
- 4.5 Front End Theory 22
- 4.6 Protection Systems 23
- 4-10 Circuit Theory 24
- 4.6.2 Over-voltage 25
- 4.6.3 DC/LF 25
- 4.6.5 Output Thermal 26
- 4.6.6 Transformer Thermal 26
- 4.6.7 FET Thermal 26
- 4.7 Display 27
- 4.8 Mono Modes 27
- 4.8.2 Parallel Mono 28
- 5 Maintenance 29
- 5.3.2 LED Checks 30
- Maintenance 5-3 31
- 5.4 Test Procedures 32
- 5-6 Maintenance 34
- Maintenance 5-7 35
- Maintenance 5-9 37
- 5-10 Maintenance 38
- Figure 5.3 10-kHz Square Wave 38
- Maintenance 5-11 39
- ENABLECH2 40
- 5-14 Maintenance 42
- 6 Parts 43
- 6-2 Parts 44
- 7 Exploded View Parts 45
- 7-2 Exploded View Parts 46
- 7.1 Main Chassis Assembly 47
- 7-4 Exploded View Parts 48
- 7.2 Front Chassis Assembly 49
- 7-6 Exploded View Parts 50
- 7.3 Middle Chassis Assembly 51
- 7-8 Exploded View Parts 52
- 7.4 Rear Chassis Assembly 53
- 7-10 Exploded View Parts 54
- Exploded View Parts 7-11 55
- 7-12 Exploded View Parts 56
- 7.6 Transformer Assembly 57
- 7-14 Exploded View Parts 58
- Exploded View Parts 7-15 59
- 7-16 Exploded View Parts 60
- Exploded View Parts 7-17 61
- 7-18 Exploded View Parts 62
- Exploded View Parts 7-19 63
- 7-20 Exploded View Parts 64
- Exploded View Parts 7-21 65
- 7-22 Exploded View Parts 66
- Figure 7.12 Output Assembly 66
- 7.12 Output Assembly 67
- 7-24 Exploded View Parts 68
- Exploded View Parts 7-25 69
- 7-26 Exploded View Parts 70
- Interconnect Cables 71
- 7-28 Exploded View Parts 72
- 8 Module and Schematic 73
- Information 73
- 9 Module Parts 75
- 9-2 Module Parts 76
- Module Parts 9-3 77
- 9-4 Module Parts 78
- Module Parts 9-5 79
- 9-6 Module Parts 80
- Module Parts 9-7 81
- 9-8 Module Parts 82
- Module Parts 9-9 83
- 9-10 Module Parts 84
- Module Parts 9-11 85
- 9-12 Module Parts 86
- Module Parts 9-13 87
- 9-14 Module Parts 88
- Module Parts 9-15 89
- 9-16 Module Parts 90
- Module Parts 9-17 91
- 9-18 Module Parts 92
- Module Parts 9-19 93
- 9-20 Module Parts 94
- Module Parts 9-21 95
- 9-22 Module Parts 96
- Module Parts 9-23 97
- 9-24 Module Parts 98
- Module Parts 9-25 99
- MA-5002VZ Service Manual 100
- 9-26 Module Parts 100
- 130446-1 Rev. A 100
- Module Parts 9-27 101
- 9-28 Module Parts 102
- (Component Side) 103
- 125903-4 PWA Component Map 103
- 9-30 Module Parts 104
- Module Parts 9-31 105
- 9-32 Module Parts 106
- Module Parts 9-33 107
- 9-34 Module Parts 108
- Module Parts 9-35 109
- 9-36 Module Parts 110
- Module Parts 9-37 111
- 9-38 Module Parts 112
- 127488-2 PWA Component Map 113
- 9-40 Module Parts 114
- Module Parts 9-41 115
- 9-42 Module Parts 116
- Module Parts 9-43 117
- 9-44 Module Parts 118
- Module Parts 9-45 119
- 9-46 Module Parts 120
- Module Parts 9-47 121
- 9-48 Module Parts 122
- Q42929-2 PWA Component Map 123
- 9-50 Module Parts 124
- Q42934-2 Negative Emitter PWA 125
- 9-52 Module Parts 126
- Q42935-9 Positive Emitter PWA 127
- 9-54 Module Parts 128
- Module Parts 9-55 129
- 9-56 Module Parts 130
- Module Parts 9-57 131
- 9-58 Module Parts 132
- Module Parts 9-59 133
- 9-60 Module Parts 134
- Module Parts 9-61 135
- 9-62 Module Parts 136
- Module Parts 9-63 137
- 9-64 Module Parts 138
- 10 Schematics 139
- 10-2 Schematics 140
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