Bosch 3912 - Troubleshooting Guide; Electrical; General

Troubleshooting Guide
PROBLEM
CAUSE
SOLUTION
PROBLEM
CAUSE
SOLUTION
PROBLEM
CAUSE
Electrical
BRAKE DOES NOT STOP BLADE WiTHiN 5
SECONDS
1. Brushes not seated or lightly sticking.
2. Motor overheated from use of not
recommended accessory or rapid on/off
cycling.
3. Blade bolt loose.
4. Other
1. Inspect/clean or replace brushes (see
Maintenance Section).
2. Use a recommended blade. Let saw cool
down.
3. Tighten blade bolt.
4. Authorized service
MOTOR DOES NOT START.
1. Check that unit is plugged in.
2. Fuse.
3. Brushes worn.
4. Other.
1. Plug unit in. Use different outlet.
2.15-Amp time delay fuse or circuit breaker.
3. See Brush Replacement in the Maintenance
and Lubrication section.
4. Authorized service.
FLASH OF LIGHT FROM MOTOR ENDCAP
WHEN SWITCH iS RELEASED.
1. Normal - brake working properly.
PROBLEM
CAUSE
SOLUTION
PROBLEM
CAUSE
SOLUTION
PROBLEM
CAUSE
SOLUTION
PROBLEM
CAUSE
SOLUTION
General
BLADE HiTS TABLE.
1. Misalignment
1.Authorized service.
ANGLE OF CUT NOT ACCURATE.
1. Misalignment
1. See Adjustments section.
CANNOT MOVE MITER ADJUSTMENT.
1. Lock knob tightened/detent engaged.
2. Sawdust under table.
3. Blade interferes with fence.
1. Loosen lock knob/move out of detent.
2. Vacuum or blow out dust. Wear eye
protection.
3. Authorized service.
HEAD ASSEMBLY WOBBLES.
1. Loose pivot points.
1.See Bevel Pivot Adjustment in the
Adjustments section.
Duide de D parmage
i lectrique
PROBLJ:IViE LE FREINN'ARRETEPASLALAIViEBANSUN BELAI
DE5 SECONDES.
CAUSE 1. Les balais ne sont pas cal6s ouils adherent
I@_rement.
2. Lemoteur a surchauff6en raisonde I'utilisationd'un
accessoire non recommand6 ou de la mise en
marcheet& I'arr#,trapide.
3. Boulondelamedesserr&
4.Autre
ACTIONCORRECTRICE
1. Inspectez/nettoyez ou remplacez les balais (voir
Sectionde maintenance).
2. Utilbez une lamerecommand@.
Laissezlascie rdroidir.
3. Serrezleboulon delame.
4. Serviceagr6&
PROBLJ:IViE LEMOTEURNEDrtMARREPAS.
CAUSE 1. V6fifiez queI'outil est branch&
2. Fusible.
3. Balaisus6s.
4.Autre
ACTIONCORRECTRICE
1. BranchezI'outil. UtilJsezuneprise diff6rente.
2. Disjoncteurou fusibletemporis6 de15A.
3.Voir Remplacement des balais dans la section
Maintenanceet lubrification.
4. Serviceagr6&
PROBLJ:ME LUIVlIERE-ECLAIR DEPUIS LE CAPUCNON DU
JVIOTEUR LORSQUE L'INTERRUPTEUR EST
RELACHE.
CAUSE 1. Situation normale -- le frein fonctionne
ad6quatement.
G n ralit s
PROBLJ:IViE LALAME SENEURTECONTRELATABLE.
CAUSE 1. Ddaut d'alignement
ACTIONCORRECTRICE
1. Serviceagr6&
PROBLJ:IMIE L'ANGLEDECOUPEN'ESTPASEXACT.
CAUSE 1. Ddaut d'alignement
ACTIONCORRECTRICE
1.Voir sectionR@lages.
PROBLJ:IViE IMPOSSIBLE DE IViOBIFIER L'AJUSTEIViENT
D'ONGLET.
CAUSE 1 Le bouton de blocage est serr6/le cran d'arr#,t est
engag&
2. Brandesciesous latable.
3. Lalameentraveleguide.
ACTIONCORRECTRICE
1. Desserrez le bouton de blocage/sor tez du cran
d'arr#,t.
2.Aspirez ou soufflez le bran de scie. Portez des
lunettesde protection.
3. Serviceagr6&
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