Repair Guide - Hitachi UR 18DSL2 Service Manual

[Bold] numbers in the descriptions below correspond to item numbers in the parts list for the Model
UR 18DSL2. The rechargeable battery must be removed from the Model UR 18DSL2 before disassembling
or repairing the Model UR 18DSL2.
1. Disassembly and reassembly of the front and back housings
<<Disassembly>>
(1) Remove the four Machine Screws M4 x 15 (Black) [3] from the front of the product.
(2) Open the Back Door [75] and remove the two Machine Screws M4 x 15 (Black) [3] from the back of the
Back Housing [26].
NOTE: Perform this operation carefully because multiple internal wires are connected between
the front and back housings.
(3) Remove the four internal wire connectors (Fig. 1) from Function PCBA [20] in the front housing. Then
you can fully separate the front housing from the back housing.
Fig. 1 • Inside the front housing
<<Reassembly>>
Reverse the disassembly procedure. Note the following at reassembly:
(1) The 3-pin connectors are shaped differently to prevent wrong installation. Do not forcibly connect the
connectors if their shapes do not match each other. (The upper 3-pin connector has red, black, and white
internal wires. The lower 3-pin connector has blue, red, and yellow internal wires.)
(2) When connecting each connector, be sure to fit it fully into the receptacle.
(3) The Front O-ring [24] is set between the mating surfaces of the front and back housings. Be careful to
prevent any part of the O-ring from protruding.
(4) Be careful to prevent internal wires from being caught between other parts.

REPAIR GUIDE

Disassembly and reassembly
Four connectors to remove
3-pin connector (upper)
3-pin connector (lower)
-4-