Huvitz HLM-7000P User manual

Auto Lensmeter HLM-7000P
1
Service Manual
Auto Lensmeter HLM-7000P

2
AUTO-LENSMETER
INDEX
1. INTRODUCTION......................................................................................................................... 4
1.1. COMPONENTS LIST ............................................................................................................................................4
1.2. REPAIR PROCEDURE............................................................................................................................................6
1.3. CAUTIONS............................................................................................................................................................7
1.4. SOFTWARE VERSION...........................................................................................................................................7
1.5. OPTICAL SYSTEM ................................................................................................................................................7
1.6. MEASUREMENT PRINCIPLE ................................................................................................................................8
2. CHECKING AND SETUP METHOD............................................................................................. 8
2.1. SETUP ORDER......................................................................................................................................................9
2.2. HOW TO SET ORIGIN...................................................................................................................................... 10
2.3. HOW TO SET 12 STANDARD LENSES............................................................................................................ 11
2.4. HOW TO SET PRISM........................................................................................................................................ 12
2.5. THE CALIBRATION OF THE CYLINDRICAL AXIS.............................................................................................. 13
2.6. PD SETUP ......................................................................................................................................................... 15
2.7. UV SETUP......................................................................................................................................................... 16
2.8. DIOPTER SETTING VARIABLES LIST................................................................................................................ 17
2.9. HOW TO CHANGE THE CCD CAMERA ......................................................................................................... 18
2.10. HOW TO CHANGE THE LED ASSEMBLY................................................................................................... 20
2.11. HOW TO CHANGE THE PINHOLE HOUSING............................................................................................ 21
3. REPAIR STANDARD .................................................................................................................... 22
3.1. REMOVING COVER ASSEMBLY....................................................................................................................... 22
3.2. FRAME ASSEMBLELY ........................................................................................................................................ 24
3.3. BACK BONE ASSEMBLY ................................................................................................................................... 26
3.3.1 PD BAR SUB-ASSEMBLY........................................................................................................................... 28
3.3.2 FOOT FRAME SUB-ASSEMBLY.................................................................................................................. 30
3.3.3 PEN FRAME SUB-ASSEMBLY ................................................................................................................... 32
3.3.4 PEN SLIDE SUB-ASSEMBLY ..................................................................................................................... 34
3.3.5 PD PINION SUB-ASSEMBLY..................................................................................................................... 36
3.3.6 LED BONE SUB-ASSEMBLY...................................................................................................................... 38

Auto Lensmeter HLM-7000P
3
3.4 LCD ASSEMBLY................................................................................................................................................ 40
3.5 UV BONE ASSEMBLY ...................................................................................................................................... 42
3.6 FRONT COVER ASSEMBLY .............................................................................................................................. 44
4. ELECTRICAL BLOCK DIAGRAM.............................................................................................. 46
4.1. ELECTRICAL BLOCK DIAGRAM......................................................................................................................... 46
4.2. INSPECTING SMPS.......................................................................................................................................... 48
4.3. LCD TEST........................................................................................................................................................ 49
4.4. LED TEST......................................................................................................................................................... 49
4.5. UV MODULE TEST...................................................................................................................................... 50
4.6. PD TEST........................................................................................................................................................... 51
4.7. THERMAL PRINTER TEST......................................................................................................................... 52
5. HOW TO UPGRADE THE FIRMWARE SOFTWARE............................................................. 53
5.1. INTRODUCTION ................................................................................................................................................. 53
5.2. HOW TO UPGRADE THE FIRMWARE SOFTWARE USING DNW APPLICATION IN HLM MACHINES....... 54

4
AUTO-LENSMETER
1. Introduction
1.1. Components List
Figure 1. Components Names (I)
LCD Screen
MEM Button
(Save Button)
Lens Table Lever
Marking Lever
Lens Holder Lever
Printer Cover
UV Cover
Lens Cap
Button
Lens Table

Auto Lensmeter HLM-7000P
5
Figure 2. Components Names (II)
Figure 3. Components Names (III)
Power Switch
Power Connector
RS-232 Connector

6
AUTO-LENSMETER
1.2. Repair Procedure
Power ON
1. Examining the Internal
Components First
2. Inspecting The value,
S.C.A. Prism
Checking
Abnormal
State
Cleaning the
Pinhole
Power off and on
Checking
Abnormal
State
Setup Again
Exit
Normal
State
Normal
State
Figure 4. Repair procedure flow chart

Auto Lensmeter HLM-7000P
7
1.3. Cautions
Always protect this instrument with Dust Cover after using.
Do not vibrate or drop this instrument; it can cause damage.
Use soft cloth or cotton swaps with alcohol when clean the pinhole.
1.4. Software version
Software version will be shown on the screen if you turn on the power switch.
1.5. Optical System
Optical system resolves the features of the lens such as diopter and prism. It is composed
of light emitting part and signal receiving part: light emitting part composed of optic LED
and collimation lens, signal receiving part composed of hartman plate and 2-dimentional
CMOS sensor. The followings are the components of each part:
Light Emitting Part
- Optic LED : 525nm
- Ball Lens : condenses the light radiated from Optic LED.
- Rubber Ring : fix ball lens.
- Scatter : disperse the optic LED light
- Pinhole : 0.3mm diameter

8
AUTO-LENSMETER
- Collimation lens : makes parallel light.
Signal Receiving Part
- Hartmann plate : divide the signal into 81 points. Prevent the other light except the
signal
- 2-dimentional CMOS sensor : converts signals into digital value.
1.6. Measurement Principle
Basic Principle
When there is no lens (0D state), parallel light that has transmitted the collimator lens
passes the pinhole and makes image on CCD. In case of convex lens (lens with plus
diopter), parallel light that has transmitted the collimator lens converges through the
measuring lens, passes the pinhole and then makes image on CCD. On the other hand, in
case of concave lens (lens with minus diopter), parallel light that has transmitted the
collimator lens diverges through the measuring lens and then passes the pinholes and at
last makes image on CCD.
Initial State
Concave Lens
Convex Lens

Auto Lensmeter HLM-7000P
9
2. Checking and Setup Method
2.1. Setup Order
Start up with pressing 3 and 6 keys, then you can meet “Setup Mode” as below.
While this mode, ‘SETUP MODE’ mark will show in the upper area.
Calibration can be processed only in SETUP mode; LENS, PRISM, CYLINDER, PD, UV.
To all setting, you should convert the display step (STEP) into 0.01. In case of prism,
convert the prism display into P-B format. Display step (STEP) and prism display format
can be changed in ‘User Setup’ screen. Press the ‘USER’ (Key 4) button in the basic
display screen.