acer KA220HQ LCD Monitor
acer KA220HQ LCD Monitor
Safety Notice
Any person attempting to service this chassis must familiarize with the chassis and be aware of the necessary safety precautions to be used when serving electronic equipment containing high voltage.
Important Safety Notice
Product Announcement
This product is certificated to meet RoHS Directive and Lead-Free produced definition. Using approved critical components only is recommended when the situation to replace defective parts. Vender assumes no liability express or implied, arising out of any unauthorized modification of design or replacing non-RoHS parts. Service providers assume all liability.
Qualified Repairability
Proper service and repair is important to the safe, reliable operation of all series products. The service providers recommended by vender should being aware of notices listed in this service manual in order to minimize the risk of personal injury when perform service procedures. Furthermore, the possible existed improper repairing method may damage equipment or products. It is recommended that service engineers should have repairing knowledge, experience, as well as appropriate product training per new model before performing the service procedures.
NOTICE
- To avoid electrical shocks, the products should be connect to an authorized power cord, and turn off the master power switch each time before removing the AC power cord.
- To prevent the product away from water or explosed in extremely high humility environment.
- To ensure the continued reliability of this product, use only original manufacturer’s specified parts.
- To ensure following safety repairing behavior, put the replaced part on the components side of PWBA, not solder side.
- To ensure using a proper screwdriver, follow the torque and force listed in assembly and disassembly procedures to screw and unscrew screws.
- Using Lead-Free solder to well mounted the parts.
- The fusion point of Lead-Free solder requested in the degree of 220°C.
Exploded Diagram
Product Exploded Diagram
| Item | ODM DESCRIPTION |
| 1 | ASSY BZL |
| 2 | PCBA CTRL |
| 3 | LCDM |
| 4 | PCB SPS BD |
| 5 | PCB IF BD |
| 6 | ASSY SHD |
| 7 | ASSY RC |
| 8 | ASSY CLMN |
| 9 | ASSY BASE |
Wiring connectivity diagram
There are four types of wiring diagrams for model KA220HQ. The wiring connectivity position will be different according to the ACTUAL PCBA connector position. Please base on different SKU refer to below diagram.
NOTE: INF BD= Interface Board, PWR BD=Power Board, CTRL BD= Control Board
- SKU without USB, without HDMI/DP
- KU without USB, with HDMI/DP
- SKU with USB, without HDMI/DP
- SKU with USB, with HDMI/DP
Mechanical Instruction
Tools Required
List the type and size of the tools that would typically can be used to disassemble the product to a point where components and materials requiring selective treatment can be removed.
Tool Description
- working table
- Screw-driver: Philips-head screwdriver, Hex-head screwdriver
- Knife
- glove
- cleaning cloth
- ESD protection
Disassembly and Assembly SOP
Preparation before disassemble
- Clean the room for disassemble
- Identify the area for monitor
- Check the position that the monitors be placed and the quantity of the monitor ;prepare the area for material flow; according to the actual condition plan the disassemble layout
- Prepare the implement, equipment, materials as bellow:
- working table
- Screw-driver: Philips-head screwdriver, Hex-head screwdriver
- knife
- glove
- cleaning cloth
- ESD protection
- ACER KA220HQ
Assembly Procedures
- Clean the room for work
- Identify the area for material
- Prepare the implement, equipment, materials as bellow：
- working table
- Screw-driver
- Knife
- glove
- cleaning cloth
- ESD protection
- After unplugging the power cord, the power board still have power energe. Please pay attention when disassembling/assembling Power BD.
ACER KA220HQ
Troubleshooting
Before sending your LCD monitor for servicing, please check the trouble-shooting list below to see if you can self-diagnose the problem
| Problems | Current Status | Remedy |
|
No Picture | LED ON | Using OSD, adjust brightness and contrast to maximum or reset to their default settings. |
| LED OFF | Check the power switch. | |
| Check if AC power cord is properly connected to the monitor. | ||
| LED displays amber color | Check if video signal cable is properly connected at the back of monitor. | |
| Check if the power of computer system is ON. | ||
|
Abnormal Picture | Unstable Picture | Check if the specification of graphics adapter and monitor is in compliance which may be causing the input signal frequency mismatch. |
|
Display is missing, center shift, or too small or too large in display size | Using OSD, adjust RESOLUTION, CLOCK, CLOCK-PHASE, H-POSITION and V-POSITION with non-standard signals. | |
| Using OSD, in case of missing full-screen image, please select other resolution or other vertical refresh timing. Using OSD, in case of missing full-screen image, please select other resolution or other vertical refresh timing. Wait for a few seconds after adjusting the size of the image before changing or disconnecting the signal cable or powering OFF the monitor. | ||
| Abnormal Sound (Only Audio-Input model) (Optional) |
No sound, or sound level is too low | Check the audio cable with the host PC is connected. |
| Check if the volume setup of the host PC is in minimum position and try to raise the volume level. |
| Problems | Current Status | Remedy |
|
No Picture | LED ON | Using OSD, adjust brightness and contrast to maximum or reset to their default settings. |
| LED OFF | Check the power switch. | |
| Check if AC power cord is properly connected to the monitor. | ||
| LED displays amber color | Check if video signal cable is properly connected at the back of monitor. | |
| Check if the power of computer system is ON. | ||
| Abnormal Sound (Only Audio-Input model) (Optional) | No sound, or sound level is too low | Check the audio cable with the host PC is connected. |
| Check if the volume setup of the host PC is in minimum position and try to raise the volume level. |
FRU List
This chapter gives you the FRU (Field Replaceable Unit) listing in global configurations of ACER KA220HQ. Refer to this chapter whenever ordering for parts to repair or for RMA(Return Merchandise Authorization). Please note that WHEN ORDERING FRU PARTS, you should c heck the most up-to-date information available on your regional web or channel. For whatever reasons a part number change is made, it will not be noted on the printed Service Guide. For AUTHORIZED SERVICE PROVIDERS, your office may have a DIFFERENT part number code from those given in the FRU list of this printed Service Guide. You MUST use the local FRU list provided by your regional office to order FRU parts for repair and service of customer machines
NOTE: T o scrap or to return the defective parts, you should follow the local government
