HS50_advance_level 2.pdf - 第93页
Stud ent Gu ide HS-5 0 Adva nced II 07/2 002 Ed ition 3 Power Supply 55 DANGER Switc h off the plac ement sy stem and disconn ect from the po wer suppl y (see section s 3.3. 1 and 3.3.2 ). ➠ Fix the pe rspe x panel to …
07/2002 Edition Student Guide HS-50 Advanced II
3 Power Supply
54
➠ Loosen the M5 fillister head screws (1).
➠ Remove the retaining rings (2).
➠ Remove the perspex cover (3)
➠ Loosen the terminal wire screw connections (4) one by one and identify with self-adhesive la-
bels.
➠ Loosen the hexagon screw bolts (5).
➠ Loosen the M5 nuts (6).
➠ Remove the lock washer (7).
➠ Remove the rectifier (8).
➠ Remove residue of heat transfer compound from the surfaces of the unit.
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➠ Apply heat transfer compound to the "metal side" of the rectifier.
➠ Fit the rectifier (8).
➠ Fit the lock washer (7) and fix to the rectifier with an M5 hexagon nut (6).
➠ Attach the hexagon screw bolts (5).
➠ Connect the terminal wires (4) (ensure that the polarity is correct).
➠ Switch the placement system on and start it up.
➠ Use the digital voltmeter to measure the voltages shown in the "Voltages at rectifiers V1 - V8"
table on page 3 - 16
.
Student Guide HS-50 Advanced II 07/2002 Edition
3 Power Supply
55
DANGER Switch off the placement system and disconnect from the power
supply (see sections 3.3.1 and 3.3.2).
➠ Fix the perspex panel to the rectifier.
PLEASE NOTE:
Do not overtighten the M5 fillister head screws, otherwise the panel might break.
➠ Complete the servicing work as described in 3.3.3 on page 3 - 29.
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– Open-ended spanner or socket spanner, size 10
–Pliers
– Self-adhesive labels
– Heat transfer compound
– Digital multimeter
– HS-50 detailed circuit diagrams
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DANGER Switch off the placement system and disconnect from the power
supply (see sections 3.3.1 and 3.3.2).
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V2 Rectifier S61-B2U 28-02 00341244-01
V3 - V6, V8 Rectifier S63-B6U 28-02 00341245-01
07/2002 Edition Student Guide HS-50 Advanced II
3 Power Supply
56
➠ Detach the cable lugs (1) from the terminal links one by one and identify the terminal wires with
self-adhesive labels.
➠ Loosen the M6 hexagon head screw (2) and remove the retaining ring (3).
➠ Remove the rectifier (4).
➠ Remove residue of heat transfer compound from the surfaces of the unit.
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➠ Apply heat transfer compound to the "metal side" of the rectifier.
➠ Fit the rectifier (4) and retaining ring (3).
➠ Fix the rectifier in place with the M6 hexagon head screw (2).
➠ Attach the cable lugs, ensuring that the polarity is correct.
➠ Switch the placement system on and start it up.
➠ Measure the voltages as per the table "Voltages at rectifiers V1 - V8" on page 3 - 16.
➠ Complete the servicing work as described in 3.3.3 on page 3 - 29.
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7RROVDQGHTXLSPHQW
– Set of slotted-head screwdrivers
– Digital multimeter
– HS-50 detailed circuit diagrams