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SHANGHAI ESURVEY GNSS CO., LTD. 

 13 

3.6 

Disassemble the Display 

The structure of the display is as follows: 

 

To disassemble the display, do the following: 

1.  Remove 4 slotted cheese head screws (M2X6) that fix the display. 

 

Be careful. The buzzer exists on back of the display. 

2.  Pull out the display cable, and remove the display. 

3.  Repeat step 

1

 ~ 

2

 to disassemble the other display. 

3.7 

Disassemble the LCD Module 

To disassemble the LCD module, do the following: 

1.  Remove 10 type AB cross recessed pan head self tapping screws (ST1.7X5): 

 

Summary of Contents for ET2A

Page 1: ...ET2AElectronicDigitalTheodolite MAINTENANCE GUIDE Shanghai eSurvey GNSS Co Ltd...

Page 2: ......

Page 3: ...t of the products services and features described in this document may not be within the purchase scope or the usage scope The information in this document is subject to change without notice Every ef...

Page 4: ...SHANGHAI ESURVEY GNSS CO LTD...

Page 5: ...rew 15 4 Assembling 15 5 Check and Adjustment 16 5 1 Check and Adjust the Plate Level 16 5 2 Check and Adjust the Circular Level 16 5 3 Check and Adjust the Optical Sight 17 5 4 Check and Adjust the L...

Page 6: ...SHANGHAI ESURVEY GNSS CO LTD II 6 7 Serious Error in the Vertical Angle 27 6 8 The Horizontal Tangent Screw is Broken 28 6 9 The Vertical Tangent Screw is Broken 28 6 10 Display Error 28...

Page 7: ...the degree of loss or injury in case of negligence or omission Indicates important paragraphs that must be adhered to in practice as they enable the product to be used in a technically correct and eff...

Page 8: ...Please do not touch the lens with your fingers And please clean the surface buttons screen and outer layer of the instrument with a soft cloth and clean the optical parts only with lens paper Please...

Page 9: ...condition and do not use the instrument in coal mine Otherwise explosion may occur Please avoid short circuit of the battery Otherwise fire may occur Please avoid disturbance of severe electrostatic d...

Page 10: ...SHANGHAI ESURVEY GNSS CO LTD 4 2 ET2A at a Glance 2 1 Important Parts The important parts of ET2A is as follows...

Page 11: ...the instrument by pressing 3 seconds and turn on or off the laser plummet by pressing 1 second after powering on the instrument R L Configure the instrument HOLD Measure the same horizontal angle seve...

Page 12: ...ct each part It is forbidden to disassembling parts not mentioned here 3 1 Disassemble the Left Cover To disassemble the left cover do the following 1 Remove four cross recessed pan head screws M2 5X1...

Page 13: ...SHANGHAI ESURVEY GNSS CO LTD 7 After disassembling the left cover the structure is as follows...

Page 14: ...r end CCD connector J2 Horizontal near end CCD connector J3 Horizontal far end CCD connector J4 Laser plummet lower connector J5 Laser plummet upper connector J6 Display connector J7 Display connector...

Page 15: ...s please be mindful of electrostatic protection 2 Loosen four cross recessed pan head screws M2 5X5 that fix the mainboard 3 Use tweezers to remove the connectors J6 J7 POWER and RS232 on the back fro...

Page 16: ...head screws M3 5X7 5 that fix the vertical circle and remove the vertical circle 3 4 Disassemble the Right Cover To disassemble the right cover do the following 1 Remove four 90 countersunk flat head...

Page 17: ...SHANGHAI ESURVEY GNSS CO LTD 11 After disassembling the right cover the structure is as follows...

Page 18: ...o disassemble the vertical tangent screw do the following 1 Unscrew the shorter mandril seat of the vertical tangent screw and remove the shorter mandril seat 2 Loosen the two hexagon socket set screw...

Page 19: ...slotted cheese head screws M2X6 that fix the display Be careful The buzzer exists on back of the display 2 Pull out the display cable and remove the display 3 Repeat step 1 2 to disassemble the other...

Page 20: ...late Level To disassemble the plate level do the following 1 Loosen the correction screw of the bubble with the adjusting pin and remove it 2 Unscrew the slotted fixing screw of plate level with slott...

Page 21: ...remove the shorter mandril seat 2 Loosen the two hexagon socket set screws M2X3 There is no need to remove it 3 Pull out the horizontal tangent screw 4 Assembling When assembling the instrument pleas...

Page 22: ...lf distance towards the center of the plate level adjust the adjusting screw of the plate level with the adjustment pin 5 Repeat step 3 5 until the bubble can remain at the center of the plate level w...

Page 23: ...ix the optical sight 5 Fix the tightening screws and make sure the optical sight collimates the mark 5 4 Check and Adjust the Laser Plummet To check and adjust the laser plummet do the following 1 Fix...

Page 24: ...reticle is not perpendicular to the horizontal axis of the telescope adjustment is required because one point on the vertical line may be used to collimate the target for horizontal angle measurement...

Page 25: ...the horizontal angle readings and increases with steep sightings When the error is greater than 8 adjustment of the collimation error is required These errors should be determined before the instrumen...

Page 26: ...cal angle Because of the close relationship between vertical index and compensator zero position it is necessary to check and adjust compensator zero position when adjusting the vertical circle to kee...

Page 27: ...ous target at a distance and press 0SET twice 12 Repeat the whole process of checking and adjusting the vertical index error until the error is less than or equal to 10 5 8 Check and Adjust the Linear...

Page 28: ...ey are no adjustment is required o If not proceed to step 9 9 To enter the factory setting power off the instrument press V and R L at the same time release and release V and R L at the same time when...

Page 29: ...the laser spot and target center do the following 1 Make the reticle center of the telescope coincides with the target center 2 Observe if the laser spot coincides with the target center o If it does...

Page 30: ...The electrode is damaged Polish the electrode head to remove the oxide layer Replace the electrode The cable for the buzzer connector is loose Connect the cable again The cable for the buzzer connect...

Page 31: ...n 6 3 Unstable Horizontal Angle Short circuit of the mainboard The mainboard is damaged or burnt 1 Disassemble the Mainboard 2 Replace the mainboard Incorrect setting Restore to the factory settings O...

Page 32: ...vel is no levelled Level the plate level Others Contact us 6 6 Serious Error in the Horizontal Angle Incorrect settings The setting of the minimum reading angle and angle unit are incorrect 1 Press R...

Page 33: ...nter configuration mode 2 Press 0SET to turn to the following page 3 To define the zenith as 90 00 00 press R L to change the value to ON 4 Press for confirmation The vertical circle is dirty The vert...

Page 34: ...mation Others Contact us 6 8 The Horizontal Tangent Screw is Broken The horizontal tangent screw needs to be replaced See Disassemble the Horizontal Tangent Screw for details 6 9 The Vertical Tangent...

Page 35: ...SHANGHAI ESURVEY GNSS CO LTD 29 The LCD module is damaged 1 Disassemble the Display 2 Disassemble the LCD Module 3 Replace the LCD module...

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Page 38: ...ghai China E mail Sales info esurvey gnss com Support support esurvey gnss com Hotline 86 400 999 8088 Website https esurvey gnss com Shanghai eSurvey GNSS Co Ltd To be the leading provider of high pr...

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