DEFECT CODE |
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LISTING OF INITIAL CAUSES
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WARRANTY STATUS |
REMARKS |
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BA |
Bad Assembly |
Defective product assembly. Factory specifications not fulfilled |
IN |
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BB |
Broken Basket |
Broken or warped basket due to shock or mechanical strain |
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| BC |
Broken Cone |
Folded or torn cone due to tear and wear or bad handling |
OUT |
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| BD |
Broken Dust-cap |
Sagging or perforated Dust-cap |
OUT |
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| BF |
Blistered Former |
Blistering of the former facing the winding |
IN |
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| BG |
Broken Diaphragm |
Broken or warped diaphragm due to excessive power or bad handling |
OUT |
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| BK |
Buckling Former |
Buckling of the voice-coil former ( Voice-coil driven out of the air-gap) |
OUT |
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| BL |
Broken loudspeaker or
compression driver |
Complete destruction of the loudspeaker |
OUT |
No possibility of service |
| BM |
Broken Magnet |
Splitt ring magnet. The voice-coil is jammed in the air-gap |
IN |
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| BR |
Bad Reconing |
Bad reconed unit |
OUT |
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| BS |
Bad Diaphragm
Replacement |
Bad user-replaced diaphragm |
OUT |
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| BT |
Broken Terminals |
Broken electrical terminals due to shock or bad handling |
OUT |
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| BZ |
Buzzing |
Unusual noise in sinusoidal excitation (Buzz) |
IN |
Specify applied voltage and frequency |
| CB |
Cut Braids |
Lead-out braid cut by mechanical fatigue breaking |
IN |
See also 'TB' code |
| CR |
Coil Rubbing |
The voice-coil rubs the gap’s surface producing extraneous noise |
IN |
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| CS |
Cold Solder |
Cold solder of the lead-out braids |
IN |
Voice-coil in open circuit |
| DC |
Direct Current |
Carbonisation of one half of the coil |
OUT |
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| DG |
Detached Grille |
Venting hole grille detached or lost |
IN |
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| DK |
Detached Gasket |
Loudspeaker gasket detached |
IN |
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| DR |
Detached Double Spider |
Glue joint failure between spiders |
IN |
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| DS |
Detached Surround |
Unsticking or delamination of surround from the cone |
IN |
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| EW |
Expired
Warranty |
Three year warranty expired |
OUT |
Production year and week is coded on batch number printed on label |
| FA |
Filings in air-gap |
Filings in the air-gap |
IN |
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| FR |
Bad Frequency
Response |
Frequency response curve goes outside the accepted QC limits |
IN |
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| IR |
Bad Impedance
Response |
Impedance response curve goes outside the accepted QC limits |
IN |
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| LB |
Too Long Braids |
Too long braids hit the cone during operation |
IN |
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| LD |
Loose
Dust-cap |
Dust-cap loose from cone |
IN |
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| LP |
Loose Phase Plug |
Compression driver phase plug loose |
IN |
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| LS |
Broken or Lost
Screws |
Loudspeaker or compression driver assembly screws completely or partially broken or lost |
OUT |
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| MA |
Missing Article |
Article listed in the delivery note not
present in the shipped items |
OUT |
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| ML |
Missing Label |
Missing loudspeaker or compression driver label |
OUT |
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| MM |
Missing Moving Parts |
Missing moving parts |
OUT |
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| MS |
Melted Solder |
Melting of the aluminum winding solders |
IN |
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| OC |
Open Circuit |
Winding in open-circuit by breaking of output wire at fatigue |
IN |
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| OD |
Over
Driven |
Exceeding of excursion limits: circularly folded cone and/or bottomed voice-coil. Damaged suspension and/or sign of phase plug on diaphragm in compression drivers |
OUT |
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| OH |
Over
Heated |
Overheating of the voice-coil. The coil is carbonized |
OUT |
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| OK |
O.K. |
No Defect Found |
OUT |
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| OP |
Out of Production |
Discontinued Product |
OUT |
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| OS |
Out of Specifications |
Out of Specifications |
IN |
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| OV |
Ovalized Voice-coil |
Ovalized Voice-coil causes Rub |
IN |
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| RP |
Rusty Plate |
Metal Parts Oxidation |
IN |
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| SB |
Too Short Braids |
Too short lead-out braid, cut during operation |
IN |
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| SC |
Short-Circuit |
Winding in short-circuit by melting with the return wire |
IN |
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| SG |
Spider
Glueing |
Breaking of the spider / voice-coil or spider/ frame gluing joint |
IN |
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| SN |
Side Noise |
Unusual noise coming from cone suspension in sinusoidal excitation (Buzz) |
IN |
Specify applied voltage and frequency |
| SP |
Shifted Plate |
Front or rear plate shifted. The voice-coil is jammed in the air-gap |
IN |
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| SS |
Softened Spider |
Softened spider causes Rub or Buzz |
IN |
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| SW |
Slipped Winding |
Partial or complete shifting of coil winding |
IN |
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| TB |
Teared Braids |
Lead-out braid accidentally snatched |
OUT |
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| TS |
Torn Spider |
Torn or broken spider |
IN |
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| TU |
Torn Surround |
Out-of-shape or torn surround |
IN |
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| VG |
Voice-coil Glueing |
Breaking of the voice-coil to cone or diaphragm gluing joint |
IN |
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| WI |
Winding Insulation |
Winding in open-circuit by melting with the return wire |
IN |
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