AccuLine 40-6680 User manual

40-6680 5 Beam Laser Pointer
Service Manual
Contents
Item Description Pages
1.0 Introduction 2
2.0 Overall Instrument Dis-assembly 2
2.1 Body module Dis-assembly 3
2.2 Core Module Dis-Assembly 4-5
2.3 Baseboard Dis-Assembly 6-7
2.4 Bottom Part Dis-Assembly 8
2.5 Housing Dis-Assembly 9-10
3.0 Schematic Diagram 10
4.0 Calibration 11-16
4.1 Initial Set-up 11-12
4.2 Quantifying Accuracy Error 12
4.3 Plumb up and Plumb Down Calibration 13-14
4.4 Front, Left, and Right Laser Calibration 15
4.5 Alarm Calibration 16
5.0 Troubleshooting Guide 16

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40-6680 Service Manual
1.0 Introduction
40-6680 5 beam laser pointer is a highly accurate instrument. Out side of a few
customer adjustments (outlined in the owners manual), all adjustments/service
operations are internal to the instrument and to be performed only by authorized
service personnel. Authorized personnel should adhere to the guidelines
described within this service manual for all repairs and/or service work. This
manual is written with the assumption that a unit is disassembled or assembled
from start to finish. In reality, only component parts or modules would be
replaced during a repair. Given this, procedures discussed in this manual should
be adjusted according to the repair being made.
2.0 Overall Unit Disassembly
1. Open the battery cover (4#) and remove 3*AA battery;
2. Using a Phillips screwdriver, remove M2.5×10(1#) screw,
and remove on/off knob (2#).
3. Using a Phillips screwdriver, remove 4 cross-slot sunk
screws M2.5×12(6#) through the bottom aperture (as
shown in the to the right.
Note that rotating the base at 90 intervals exposes
each of the 4 screws.
Once all 4 screws have been removed carefully lift
housing part (3) off of body module (5) taking care
not to damage the battery and power indicator
wires.
4. Disconnect the power plug and indicator light plug
connecting to the main circuit board module and housing
part (3#).
Item JLT Part # Description Qty
1 AP1572 M2.5 x 10 Cross Plate Screw 1
2 AP1820 On/Off Knob 1
3 AP1821 Housing Part 1
4 AP1822 Battery Cover 1
5 AP1823 Body Module 1
6 AP1824 M2.5 x 12 Cross Sunk Screw 4 1
2
3
AA电池
4
6
5
3 AA Batteries
5
3

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2.1 Body Module Disassembly (AP1823)
1. Using a soldering iron, de-solder the wires that connect the
power switch (5-2) and the main circuit board module (5-3).
2. Using a Phillips screwdriver, remove 2 cross plate screws
M2×8(5-1) and remove the power switch (see figure 4)
3. Using a soldering iron, de-solder the wires that connect core module (5.6) and the main circuit board (5-3).
4. Using a Phillips screwdriver, remove 2 cross-slot plate screws M2×4(5-4), then remove the main circuit board module (see
figure 5).
5. Using a Phillips screwdriver, remove 2 cross-slot plate screws M2×8(5-7) and 4 cross-slot plate screws M2.5×14(5-5),
then remove the core module (see figure 6)
6. Meanwhile, remove the press ring (5-9) and two press springs (5-8). Reference figure
7.
7. Using a Phillips screwdriver, remove 4 cross cross-slot plate screws M2.5×6 (5-10),
then remove the baseboard part (5-11) and base part (5-12). Reference figure 8.
Item JLT Part # Description Qty
5-1 AP1491 M2 x 8 Cross Plate Screw 2
5-2 AP1825 Power Switch 1
5-3 AP1826 Main PCB 1
5-4 AP1475 M2 x 5 Cross Plate Screw 2
5-5 AP1682 M2.5 x 14 Cross Plate Screw 2
5-6 AP1827 Core Module 1
5-7 AP1491 M2 x 8 Cross Plate Screw 2
5-8 AP1828 Compensator Lock Springs 2
5-9 AP1829 Compensator Lock 1
5-10 AP1449 M2.5 x 6 Cross Plate Screw 4
5-11 AP1830 Baseboard Part 1
5-12 AP1831 Bottom Part 1
5- 1
5- 2
5- 3
5- 4
5- 5
5- 6
5- 7
5- 8
5- 9
5- 10
5- 11
5- 12
5- 1
5- 2
5- 4
5- 3
5- 6
5- 5
5- 7
5- 9
5- 8
5- 10
5- 12
5- 11
Figure 4
Figure 8
Figure 7
Figure 6
Figure 5

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2.2 Core Module Disassembly (AP1827)
1. Using a soldering iron, de-solder one end of four hairsprings
between the hairspring board module 1 (5-6-1) and 2 (5-6-3).
2. Using a Phillips screwdriver, remove 4 cross-slot plate
tapping screws ST2.2×6.5 (5-6-16), and remove hairspring
board module 1 (5-6-1).
3. Using a Phillips screwdriver, remove 2 cross-slot plate
screws M2×5 (5-6-2), then remove hairspring board module
2 (5-6-3).
4. Using a Phillips screwdriver, remove 4 cross-slot plate
screws M2×5 (5-6-17) and disassemble 2 brackets 2 (5-6-18).
Reference see figure 9.
Item JLT Part
#
Description Qty
5-6-1 AP1832 Hair Spring Module 1 1
5-6-2 AP1475 M2 x 5 Cross Plate Screw 2
5-6-3 AP1833 Hair Spring Module 2 1
5-6-4 AP1834 M2 x 12 Cross Plate Screw 4
5-6-5 AP1835 Gimbal Module 1
5-6-6 AP1836 Compensator Module 1
5-6-7 AP1837 M3 x 4 Inner Hex Tightening
Screw
1
5-6-8 AP1838 M2 x 4 Cross Plate Screw 2
5-6-9 AP1839 Connecting Board 1
5-6-10 AP1491 M2 x 8 Cross Plate Screw 4
5-6-11 AP1840 Prism Modules 1
5-6-12 AP1491 M2 x 8 Cross Plate Screw 4
5-6-13 AP1841 Laser Module 1 3
5-6-14 AP1491 M2 x 8 Cross Plate Screw 4
5-6-15 AP1842 Laser Module 2 2
5-6-16 AP1843 ST2.2×6.5 Cross Self
Tapping Screw
4
5-6-17 AP1475 M2 x 5 Cross Plate Screw 4
5-6-18 AP1844 Support Bracket 2
5- 6- 1
5- 6- 2
5- 6- 3
5- 6- 4
5- 6- 5
5- 6- 6
5- 6- 7
5- 6- 8
5- 6- 9
5- 6- 10
5- 6- 11
5- 6- 12
5- 6- 13
5- 6- 14
5- 6- 15
5- 6- 3
5- 6- 2
5- 6- 1
5- 6- 16
5- 6- 17
5- 6- 18
Figure 9
5-6-16, 5-6-17, and 5-6-18 are not
shown. Reference figure 9 for detail

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5. Using a Phillips screwdriver, remove 3 cross-slot plate screws M2×12
(5-6-4#) and remove gimbal module (5-6-5).
6. Using a 3M Hex Wrench, remove the inner hexagon tightening screw
M3×3 (5-6-7)
7. Using a 3/32” steel rod, remove off the pendulum module (5-6-6#) by
turning it counterclockwise (while looking at it from the bottom).
Reference see figure 10.
8. Using a soldering iron, de-solder all connection lines between the laser
modules and the connecting board (eight pieces in all). Screw off two
cross-slot plate screws M2×4(5-6-8#) by a cross screwdriver. Take off
the connecting board module (5-6-9#);
9. Using a Phillips screwdriver, remove 4 cross-slot plate screws
M2×8(5-6-10), and remove the prism module (5-6-11).
10. Using a Phillips screwdriver, remove 4 cross-slot plate
screws M2×8(5-6-12), then remove 3 laser source
modules 1 respectively (5-6-13);
11. Using a Phillips screwdriver, remove 4 cross-slot plate
screws M2×8(5-6-14), then remove laser source
module2 (5-6-15). Reference see figure 11.
5- 6- 8
5- 6- 9
5- 6- 10
5- 6- 11
5- 6- 13
5- 6- 12
5- 6- 14
5- 6- 15
5- 6- 6
5- 6- 5
5- 6- 4
5- 6- 7
Figure 11
Figure 10

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2.3 Baseboard Disassembly (AP1830)
5 - 1 1 - 1
5 - 1 1 - 2
5 - 1 1 - 3
5 - 1 1 - 4
5 - 1 1 - 5
5 - 1 1 - 6
5 - 1 1 - 7
5 - 1 1 - 8
5 - 1 1 - 9
5 - 1 1 - 1 0
5 - 1 1 - 1 1
5 - 1 1 - 1 2
5 - 1 1 - 1 3
5-11-1
Item JLT Part
#
Description Qty
5-11-1 AP1845 Support Rod 3
5-11-2 AP1475 M2 x 5 Cross Sunk Screw 3
5-11-3 AP1653 M2 x 3 Cross Plate Screw 2
5-11-4 AP1846 Buzzer Module 1
5-11-5 AP1464 M2 x 6 Cross Plate Screw 3
5-11-6 AP1847 Ring 1
5-11-7 AP1838 M2 x 4 Cross Plate Screw 2
5-11-8 AP1848 Limit Position Cover 1
5-11-9 AP1849 Magnets 6
5-11-10 AP1850 Base Board 1
5-11-11 AP1851 Spindle Module 1
5-11-12 AP1852 Spindle Seat 1
5-11-13 AP1838 M2 x 4 Cross Plate Screw 4

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1. Using a Phillips screwdriver, remove 4 cross-slot sunk screws
M2.5×5(5-11-2), then remove three support rods (5-11-1).
2. Note: there are two kinds of these three connecting poles. Two poles with
M2 screw holes are in the front (see figure 12).
3. Using a Phillips screwdriver, remove 2 cross-slot plate screws
M2×3(5-11-3), then remove off the buzzer module (5-11-4).
4. Using a Phillips screwdriver, remove 3 cross plate screws M2×6 (5-11-5),
then remove partition ring (5-11-6). Reference figure 13.
5. Using a Phillips screwdriver, remove 2 cross plate screws M2×4(5-11-7),
then remove limit-position cover (5-11-8).
6. Take out 6 magnets (5-11-9)
Note: Polarities of two adjacent magnets are reverse
7. Using a Phillips screwdriver, remove 4 cross plate screws
M2×4(5-11-13), then remove the axis base (5-11-12) and axis
module (5-11-11).
5- 11- 2
5- 11- 1
5- 11- 3
5- 11- 4
5- 11- 5
5- 11- 6
5- 11- 7
5- 11- 8
5- 11- 9 5- 11- 10
5- 11- 12 5- 11- 11
5- 11- 13
Figure 12
Figure 13
Figure 14

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2.4 Bottom Part Disassembly (AP1831)
1. Use a minus screwdriver to loosen two notch tightening
screws (5-12-1). Screw off the press ring (5-12-2)
2. Take out the Poly-four-fluorin spacer (5-12-3)
3. Take out the base plate (5-12-4)
4. Take out the bottom axis (5-12-6)
5. Screw off the press ring2 (5-12-8)
6. Take out the glass (5-12-7)
Item JLT Part
#
Description Qty
5-11-1 AP1853 Notch Tightening Screws 1
5-11-2 AP1854 Press Ring 1 1
5-11-3 AP1855 Gasket 1
5-11-4 AP1856 Base Plate 1
5-11-5 AP1857 Base 1
5-11-6 AP1858 Bottom Spindle 1
5-11-7 AP1859 Round Glass 1
5-11-8 AP1860 Press Ring 2 1
5- 12- 1
5- 12- 2
5- 12- 3
5- 12- 4
5- 12- 5
5- 12- 6
5- 12- 7
5- 12- 8

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2.5 Housing Disassembly (AP1821)
Item JLT Part
#
Description Qty Item JLT Part
#
Description Qty
3-1 AP1861 Top Cover Module 1 3-10 AP1866 M2 x 4 Cross Sunk Screws 2
3-2 AP1838 M2 x 4 Cross Plate Screws 2 3-11 AP1843 ST2.2×6.5 Cross Self
Tapping Screw
4
3-3 AP1862 Plastic Screws 2 3-12 AP1873 Fixing Lead Piece 1
3-4 AP1863 Front Cover module 1 3-13 AP1868 Battery case 1
3-5 AP1864 Indicator Light 1 3-14 AP1869 Left Housing 1
3-6 AP1838 M2 x 4 Cross Plate Screws 2 3-15 AP1870 Right Housing 1
3-7 AP1865 Right Cover Module 1 3-16 AP1871 Body Housing 1
3-8 AP1866 M2 x 4 Cross Sunk Screws 2 3-17 AP1872 Rubber Jacket 1
3-9 AP1867 Left Cover Module 1
3- 1
3- 2
3- 3
3- 4
3- 5
3- 6
3- 7
3- 8
3- 9
3- 10
3- 11
3- 12
3- 13
3- 14
3- 15
3- 16

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1. Using a Phillips screwdriver, remove 2 cross-slot plate screws M2×4(3-2), then remove the top cover module (3-1)
2. Using a Phillips screwdriver, remove 2 cross-slot plate screws M2×4(3-6) , then remove the front cover module (3-4#)
3. Remove out indicator light (3-5)
4. Remove the plastic screw (3-3)
5. Using a Phillips screwdriver, remove 2 cross-slot sunk screws M2×4(3-8), then remove the right cover module (3-7).
6. Using a Phillips screwdriver, remove 2 cross-slot sunk screw M2×4(3-10), then remove the left cover module (3-9).
7. Using a Phillips screwdriver, remove 4 cross-slot plate tapping screws ST2.2×6.5(3-11), then remove battery case
(3-13).
8. Remove the piece fixing the lead (3-12)
9. Remove the body housing(3-16)
10. Remove the left shell (3-14) and right shell (3-15)
3.0 Schematic Diagram
The schematic diagram shows function blocks and general wire connections. It does not detail operation of
each functional block.
Main PCB
Power Switch
Alarm/Buzzer
Laser Modules
Hair Spring Modules

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4.0 Calibration
Calibration is a process that is used to correct for accuracy and/or functional errors above and beyond those
stated in published specifications. While Manual-leveling, Self-leveling, and Automatic-leveling (motor
driven) devices have different mechanisms that require calibration, there are similarities with optics that is
consistent regardless of the leveling mechanism. This section of the service manual discusses calibrations
specific to the 40-6680. Each item discussed is shown below.
4.1 Initial Set up
4.2 Quantifying Accuracy Error
4.3 Plumb up and Plumb Down Calibration
4.4 Front, Left, and Right Laser Calibration
4.5 Alarm Adjustment
4.1. Initial Set-up
Establish the set up shown in the following drawing referring to the instructions below.
1. As shown above, construct an indoor platform, which is 5m away from the three sides of the wall respectively. The
platform is about 1m high.
2. Put a bracket with a hole in the center on the platform.
3. Drill a 3mm hole on any one right-angle surface of the prism. Put the prism below the bracket and on the platform. The
hole on the right-angle surface must be on one line with the bracket center hole. Adjust the angle to make the plumb-down
point emitted by the instrument be reflected near the position P on the wall;
4. Set the theodolite above the bracket using a tripod. The plumb-down point of the theodolite must be on one line with the
center of the 3mm circle on the prism (under-mentioned as down adjacent light point)
3mm circle
Plumb
-
Down Laser Line
Prism Right-angle Surface

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5. Use the theodolite to mark three vertical lines on the three walls, respectively. All angles between the three vertical lines
are right angles.
6. Use the theodolite to mark 3 horizontal lines at the intersection of the vertical lines, assuring that they are all at the same
height on the wall.
7. Mark the three cross points of the three vertical lines and the three horizontal lines as A,B,C, which are the reference
points for the left, face and right laser spot respectively.
8. Take a high-accuracy instrument and make its plumb-down point be on one line with the down adjacent light point.
9. Then put a right-angle prism on the bracket. Adjust the angle to make the up laser point emitted by the instrument be
reflected on the wall near the position O;
10. Make the front laser point face the wall. Mark the up and down laser spot reflected through the prism on the wall as
O1 and P1. Then rotate the instrument by 90o, 180 o and 270 o clockwise, and mark O2, O3, O4 and P2, P3, P4.
11. Take the center point of O1, O2, O3, O4, This center point just is the
reference point for the up laser point. Take the center point of P1, P2, P3,
P4, This center point just is the reference point for the down laser point.
See the illustration to the right.
4.2. Quantifying Accuracy Error
1. As shown in the figure to the right, put the instrument on the test
platform. Connect with the power, and turn on the Power switch.
2. Make the plumb-down point be on one line with the down adjacent light
point. The front point faces the vertical line, which B is on.
3. Observe whether the five centers of the five laser spots are within the
five circles respectively, of which the diameter is 2mm and the centers
are the reference point A, B, C, O and P respectively. If not, the
instrument needs adjusting. (See figure below)
Circle with a diameter of 2mm
Center of laser spot
Circle with a diameter of 2mm
Center of laser spot
Reference Point Reference Point
The accuracy of the laser point is qualified Need adjustment
O1
O2
O3
O4
O
P1
P2 P
P3
P4

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4.3. Plumb Up and Plumb Down Calibration
1. When the up and down laser
points are beyond tolerance as
shown in the figure to the right,
they can be adjusted using the
power adjusting screw (see
below). ‘
When the instrument is in
the state1, you can loosen
the screw 2 and tighten
screw 1.
When the instrument is in
the state2, you can loosen
the screw 1 and tighten
screw 2.
When the instrument is in
the state3, you can loosen
the screw 4 and tighten
screw 3.
When the instrument is in the
state4, you can loosen the
screw 3 and tighten screw 4
Screw 1 Screw 2
Screw 3
Screw 4
Up Laser
Up Laser
Reference Point
Reference
Reference Point
Reference Point
Down Laser
Down Laser
Circle with a diameter of
Circle with a diameter of Circle with a diameter of
Circle with a diameter of
Up Laser Point
Circle with a diameter of 2mm
Reference Point
Up Laser Point
Circle with a diameter of 2mm
Reference Point
down Laser Point
Circle with a diameter of 2mm
Reference Point
Reference Point
down Laser Point
Circle with a diameter of 2mm
State 1
State 2
State 3
State 4

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2. When the up and down laser points
are beyond tolerance as shown in
the figure to the right, you can
adjust the pendulum adjusting
screw to calibrate (see below).
When the instrument is in the
state 5, you need to twist the
pendulum adjusting screw
clockwise using an inner
hexagon spanner.
If in the state 6, you need to
twist the pendulum adjusting
screw count-clockwise.
Up Laser Point
Up Laser Point
Down Laser Point
Down Laser Point
Circle with a diameter of Circle with a diameter of
Circle with a diameter of
Circle with a diameter of
Reference Point Reference Point
Reference Point
Reference Point
State 5
State 6

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4.4. Front, Left, and Right Laser Calibration
3. When the front, left and
right laser points are
beyond tolerance as
shown in the figure to
the right, you need to
adjust the screws
shown in the figure
below.
When the
instrument is in the
state7, you can
loosen screw 7 and
tighten screw 8.
When the
instrument is in the
state 8, you can
loosen screw 8 and
tighten 7.
When the
instrument is in the state 9, you can loosen screw 6 and tighten 5.
When the instrument is in the state10, you can loosen screw 5 and tighten 6.
4. After the above adjusting is completed, double check accuracy of the entire instrument as described in 4.1. If there still is
error, repeat respective calibrations until the unit is qualified.
Screw 5Screw 6
Screw 7
Screw 8
Laser spot
Laser spot Circle with a diameter of Circle with a diameter of
Reference
Reference
State 10
State 9
Circle with a diameter of
Circle with a diameter of
Laser
Laser
Reference point
Reference point
State
8
State
7

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4.5. Calibration for sound alarming range
As shown in the illustration to the right, place the unit on a level
platform and observe the position of the alarm rod. For equal
alarming angles in all directions, the rod should be centered between
the contact ring. The ring can be adjusted by reheating the solder to a
molten state and repositioning the ring accordingly.
5.0. Troubleshooting Guide
No. Symptom Cause Repair method
1
Dea
d batteries Replace with new battery (3*AA)
2
Disconnected power line
Weld the leading wire or replace the
battery case
3
Switch is broken.
Replace the switch
4
Unable to power on (no laser is
emitting, extinguished power
indicator light, no sound alarm if
titled beyond tolerance)
Main circuit board is broken.
Replace the main circuit board
5
The indicator is broken
Replace the indicator
6
After power on, the indicator is not
lighted
Main circuit board is broken
Replace the main circuit board
7
Hairspring is cut off
Replace the hairspring
8
Laser source is broken
Replace the laser source
9
No laser is emitting
Main circuit b
oard is broken Replace the main circuit board
10
Beeper is broken
Replace the beeper
11 No sound if tilted beyond tolerance
Main circuit board is broken
Replace the main circuit board
12 No alarm if tilted beyond tolerance
Main circuit board is broken
Replace the main circuit board