III-1
CHAPTER III
DISASSEMBLY & REASSEMBLY PROCEDURE
Safety Precautions
(1)
You should carry out disassembly & reassembly jobs on an anti-static sheet
grounded
correctly. Otherwise, the LSI and other electronic devices will be damaged due to
the electricity charged in your body.
(2)
When transporting PCBs, be sure to wrap them in conductive sheets such as
aluminum foil.
(3)
When using soldering irons and other heat-generating tools, take care not to
damage the resin parts such as wires, PCBs, and covers.
(4)
Be careful not to lose screws, washers, or other parts removed for parts
replacement.
(5)
Tighten screws to the torque values listed below.
Tightening Torque List
Location
Screw type
Q’ty
Tightening torque
Middle cover
Taptite, bind B M2.6 x 8
5
0.39 ±0.10 N•m (4 ±1 kgf•cm)
Chassis sub ASSY
Taptite, bind B M2.6 x 6
2
0.39 ±0.10 N•m (4 ±1 kgf•cm)
DC motor
Screw, pan M1.7x2.5
2
0.15 ±0.05 N•m (1.5 ±0.5 kgf•cm)
Cutter ASSY
Taptite, cup S M3x5
1
0.59 ±0.10 N•m (6 ±1 kgf•cm)
Head ASSY
Screw, bind M3x4
1
0.59 ±0.10 N•m (6 ±1 kgf•cm)
Sub PCB ASSY
Taptite, bind B M2.6 x 8
1
0.39 ±0.10 N•m (4 ±1 kgf•cm)
Main PCB
Taptite, bind B M2.6 x 8
1
0.39 ±0.10 N•m (4 ±1 kgf•cm)
Ground wire
Taptite, bind B M2.6 x 6
1
0.39 ±0.10 N•m (4 ±1 kgf•cm)
Summary of Contents for PT-2420PC
Page 1: ...SERVICE MANUAL MODEL PT 2420PC ...
Page 49: ...IV 6 2 Printing Failure ...
Page 50: ...IV 7 3 The Indicator LED will not come on ...
Page 51: ...IV 8 4 Interface Malfunctions ...
Page 62: ......
