Garland SH/BA 3500, Service Manual

Page: 23 / 28

Service-Manual, new version author: Chr. Fuchs 17.06.99 / INDUCS Ltd. 18.09.03 page 23 of 28
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Put the screws to fix the rectifier, 5 crews M4x16 (3 Phases) or 4 screws M4x16 (1 Phase)
Make attention to the distance bolts und the plain washers: bolt head/spring washer/spring
washer/ plain washer/distance bolts (range the two spring washers together)
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Put the screws to fix the transistor module. Do not yet tighten the screws.
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Fix the screws of the rectifier
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Fix the screws on the transistor module. Don’t tighten too much.
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Fix the bolt M4 and the screws M4 in the corners of the print plate
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Solder the connectors J16, J17, J18, J19 with solder plating
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Connect the clamping joints on the power print:
1 Phase: L1, N, PE, 1,2,4,5,7,8
3 Phases: L1, L2, L3, PE, 1,2,3,4,5,6,7,8
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Connect all plug-type connectors on the power print: ST1
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Connect ST5 on the power print C018
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Connect the coil with A1 and A2 (screws)
8.3 Logic print C018
Dismount of logic print
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Disconnect all plug-type connectors: ST1, ST4, ST5, ST6, ST7, ST8
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Remove nut M3 and the 3 plastic bolts
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Remove the logic print
Assembly of the logic print
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Put the new logic print (Exchange print) into the case
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Fix the print with nut M3 and the 3 plastic bolts
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Connect all plug-type connectors on the logic print: ST1, ST4, ST5, ST6, ST7, ST8
8.4 Transistor module
First dismount power print C016, C031 (see 8.2)
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Remove the two hexagon socket screws
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Remove the module of the heat sink
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Clean the surface of the heat sink: remove the heat conducting paste (for example with
methyl spirit)
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Put on a new couch of heat conducting paste on the new transistor module. Make sure that
the whole side below is well covered with paste.
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Fix the module with the hexagon socket screws at the heat sink
Attention: Measure (and replace if necessary) Z-diodes D7, D8, D9, D10 on the power
print, eventually replace D7, D9 =12V, D8, D10 = 6.8V (see page 26/27)
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Fix the power print C016, C031 (see 8.2)
8.5 Rectifier
First dismount the power print C016, C031 (see 8.2)
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Remove the screws
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Remove the rectifier from the heat sink
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Clean the surface of the heat sink: remove the heat conducting paste (for example with
methyl spirit)
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Put on a coach of heat conducting paste on the new transistor module. Make sure that the
whole side below is well covered with paste.