midi LOGGER
SERVICE MANUAL
200/ 200A
GL200-UM-251
GL200-UM-251-05-9370
GL200-UM-251-9370 i
HISTORY OF REVISIONS
No. Date issued Description of revision Page Edition
1 06.02.14 First Printing All 01
2 06.03.29
Information for the connector of narrow LCD flexible was added.
3-3 02
3 07.05.10 Part number for LCD was corrected. 6-1,6-4 03
4 08.08.20
Information for the GL200A was added.
04
5 08.08.20 Part number for top covers were corrected. 6-2 04
6 08.08.20 Part number for bottom cases were corrected. 6-2 04
7 08.08.20 Part number for battery covers were corrected. 6-3 04
8 08.08.29 Note for the firmware version was corrected. 2-1 05
GL200-UM-251-9370 ii
TO ENSURE SAFETY
This Service Manual has been compiled for the purpose of facilitating repair and maintenance of the GL200
midi LOGGER by Graphtec service personnel and other persons who have undergone equivalent technical
training.
Maintenance or repair by unauthorized service personnel is to be strictly avoided. Because the GL200
contains numerous internal components with a high electric potential, such work by unauthorized service
personnel could cause human injury or serious damage to the GL200 midi LOGGER.
GL200-UM-251-9370 iii
CONTENTS
1. CONFIGURATION .................................................................................. 1-1
1.1 Model Configuration .....................................................................................................1-1
1.2 Accessories and Options .............................................................................................1-1
2. UPGRADING THE FIRMWARE ............................................................. 2-1
2.1 How to Upgrade the GL200/A Flash ROM from the USB memory device ...............2-1
3. DISASSEMBLY AND REASSEMBLY .................................................... 3-1
3.1 Notes on Disassembly and Reassembly ....................................................................3-1
3.2 Removing the Side Pads ...............................................................................................3-1
3.3 Disassembling the Top Cover and the Bottom Case Assembly ...............................3-2
3.4 Replacing the Main Control Board ..............................................................................3-3
3.5 Replacing the Control Panel Board ............................................................................ 3-4
3.6 Replacing the LCD ........................................................................................................ 3-5
3.7 Replacing the AMP Board ........................................................................................... 3-6
3.8 Replacing the Input Terminal Board ........................................................................... 3-8
4. SETUP PROCEDURES .......................................................................... 4-1
4.1 Entering the System Setup Menu ................................................................................4-1
4.2 AC Line cycle Setting ................................................................................................... 4-4
4.3 Performing Setup1 (Voltage Input) ............................................................................. 4-5
4.4 Performing Setup2 (Room Temperature Compensation) ......................................... 4-8
5. INSPECTION AND CHECK PROCEDURES ......................................... 5-1
5.1 Inspection and Check Methods ...................................................................................5-1
5.1.1 Measurement Accuracy .......................................................................................................... 5-3
5.1.2 Temperature Accuracy ............................................................................................................ 5-6
6. PARTS LISTS ......................................................................................... 6-1
6.1 Recommended Parts List .............................................................................................6-1
6.2 Parts Lists ......................................................................................................................6-2
6.2.1 Outer Casing ........................................................................................................................... 6-2
6.2.2 Bottom Parts ........................................................................................................................... 6-3
6.2.3 Top Parts ................................................................................................................................. 6-4
6.2.4 Standard Accessories ............................................................................................................. 6-5
7. Block Diagram ....................................................................................... 7-1
GL200-UM-251-9370 1-1
1. CONFIGURATION
1. CONFIGURATION
1.1 Model Configuration
GL200 : 10-channel model with color monitor and internal memory
1.2 Accessories and Options
GL200/GL200A
Unit name
Model
name
Description
Humidity Sensor B-530 Same as GL450/500
Battery Pack B-517 Same as GL450 /500
DC Drive Cable B-514 Same as GL450 /500
GL200-UM-251-9370 1-2
1. CONFIGURATION
GL200-UM-251-9370 2-1
2. UPGRADING THE FIRMWARE
The version of your GL200/A’s firmware can be upgraded by rewriting the flash ROM on the pertinent circuit
boards. You can upgrade the firmware by loading the update program to a USB memory device.
2.1 How to Upgrade the GL200/A Flash ROM from the USB memory device
Preparations for the upgrade
Firmware :Mxxxa001.G20 ← Main Program file for GL200/A
:Mxxxa002.G20 ← Main Program file for GL200/A
Note:
The former firmware version of 2.00 are for the GL200.
The firmware version from 2.00 is for the GL200A.
Do not install firmware of the GL200A to the GL200.
(1) Connect the AC adapter for the GL200/A.
(2) Turn on the GL200/A.
(3) Copy the two main program files to a USB memory device from the computer.
How to upgrade
(1) Insert the USB memory device containing the main upgrade program into the GL200/A's USB port.
(2) Turn on the GL200/A to automatically execute the upgrade program.
(3) Wait until the display shown below appears or until the beeper sound stops.
Note:
Don't turn off the GL200 until this process is finished.
GL200
The following message will appear on the GL200/A display in yellow characters when the upgrade is
complete. Also the beeper will sound for 5 seconds.
“Please Turn Off the Power. I have locked up.”
(4) Turn off the power to the GL200/A when the above message is displayed or when the beeper sound
stops.
(5) Delete the two main program files from the USB memory device.
This is to avoid upgrading the firmware by mistake.
GL200-UM-251-9370 3-1
3. DISASSEMBLY AND REASSEMBLY
3. DISASSEMBLY AND REASSEMBLY
3.1 Notes on Disassembly and Reassembly
• During disassembly, disconnect the cables from the specified connectors as necessary.
• During reassembly, double-check to ensure that the proper cables have been correctly re-connected to
the pertinent connectors.
• Some areas of the control panel unit possess a high electrical potential, so exercise caution to avoid an
electrical shock.
• When handling the LCD shield and LCD protective plate, be careful not to leave fingerprints or other
marks on them.
3.2 Removing the Side Pads
Disassembly
(1) Peel off the left and right side pads from the main unit.
Main Unit
Side Pad
Side Pad
Re-assembly
(1) Push the left and right side pads against the main unit and then install them on the main unit.
GL200-UM-251-9370 3-2
3. DISASSEMBLY AND REASSEMBLY
3.3 Disassembling the Top Cover and the Bottom Case Assembly
Disassembly
(1) Remove the side pads from the main unit (See Section 3.2).
(2) Remove the four M2L8 self-tapping screws from the bottom cover.
(3) Disconnect the connector between the main control board and the AMP board and then remove the top
cover assembly.
M2L8 self-tapping screw
Bottom case assembly
Top cover assembly
Re-assembly
(1) Re-assemble the top cover assembly and the bottom case assembly in the reverse order in which they
were disassembled.
GL200-UM-251-9370 3-3
3. DISASSEMBLY AND REASSEMBLY
3.4 Replacing the Main Control Board
Disassembly
(1) Remove the side pads from the main unit (See Section 3.2).
(2) Disassemble the top cover assembly and the bottom case assembly (See Section 3.3).
(3) Disconnect the LCD fl exible cable from the main control board.
(4) Remove the two M2L8 self-tapping screws holding the main control board from the top cover assembly.
(5) Disconnect the connector between the main control board and the control panel board and then remove
the top cover assembly.
Top cover assembly
Main control board
Control panel board
LCD flexible cable
M2L8 self-tapping screw
How to release the narrow LCD fl exible cable from the connector
Lift up the black part of the connector using the small fl at-head screwdriver.
Lift up this part
Re-assembly
(1) Re-assemble the main board in the reverse order in which it was disassembled.
(2) Perform the Setup operations for the GL200/A when you replace the main control board.
GL200-UM-251-9370 3-4
3. DISASSEMBLY AND REASSEMBLY
3.5 Replacing the Control Panel Board
Disassembly
(1) Remove the side pads from the main unit (See Section 3.2).
(2) Disassemble the top cover assembly and the bottom case assembly (See Section 3.3).
(3) Remove the main control board (See Section 3.4).
(4) Remove the four M2L5 self-tapping screws holding the control panel board from the top cover assembly.
(5) Remove the control panel board from the top cover assembly.
Top cover assembly
Control panel board
M2L5 self-tapping screw
Re-assembly
(1) Re-assemble the control panel board in the reverse order in which it was disassembled.
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