HTC MDA2 service manual Checksum

Page 36

3

Touch Test

Tap the cross mark (+) with stylus on the correct location.

Could be LCM issue

 

 

Fail if no reaction

 

 

 

Calibrate the screen following the + mark.

 

 

 

Press ACTION to exit.

 

 

 

 

 

4

Play Test

Play the tone with 8KHz/L-channel, then

Could be speaker or

 

 

Hear the sound and notice if bad sound quality happens

M/B issue

 

 

 

 

5

Record Test

Select this item to record test, then press Action to start

Could be MIC or M/B

 

 

recording. It will automatically playback it. Then connect with

issue

 

 

earphone or external speaker and press action to check

 

 

 

the record function is OK or not thru ext speaker.

 

 

 

 

 

6

Button Test

Press each button to know if it works. Follow the instruction

Could be switch or MB

 

 

shown on the screen to finish the test item

issue

 

 

Stop on fail.

 

 

 

 

 

7

Checksum

Verifies the checksum of the code.

 

 

 

 

 

8

B Light Test

Back Light turns ON and Off, Check the light change

Could be M/B or LCM

 

 

Starting from Level 3

issue

 

 

Press Action button to enter Level 2

 

 

 

Press Action button again to enter Level 1

 

 

 

Press Action again to enter Level 0

 

 

 

Action again for back to MENU

 

 

 

 

 

9

LED Test

The message LED will show starting with RED

Could be LED or M/B

 

 

Press Action LED will change to GREEN

issue

 

 

Press Action LED will change to AMBER

 

 

 

Press Action Key LED will ON (YES & END)

 

 

 

Press again Action will back to MENU

 

 

 

 

 

10

Battery Test

Test main battery and AC power source. Insert AC power

Could be main battery

 

 

CUR will show “+ “means charging , remove AC power CUR

or M/B

 

 

will show “-“means internal power.

 

 

 

Note: The Battery capacity shown is only for reference

 

 

 

 

 

11

Vibrator Test

Press action, units should vibrate.

Check the vibrater

 

 

Press Action again back to MENU

 

 

 

 

 

HTC confidential

© 2001, HTC Corporation. All rights reserved.

TOTAL 43 CONT.ON. 37 PAGE NO. 36

Image 36
Contents For MDA2 APP D Table of contents Product Specifications 2Specifications of MDA2Introduction Specification of AC Adapter GSM/GPRS Functional BlockGPRS/GSM PDA Functional BlockTotal 43 CONT.ON page no Total 43 CONT.ON page no TTE System Block Diagram Servicing Tools Assembling and Disassembling DisassemblingTotal 43 CONT.ON page no Total 43 CONT.ON page no Total 43 CONT.ON page no Use tweezers to remove the Vibrator Speaker Total 43 CONT.ON page no Gasket LCM Poron Total 43 CONT.ON page no Total 43 CONT.ON page no Antenna Assembly TipsFIX Antenna Cover Test Problem Diagnostics List of Test JigsClassification of Non-Conformity Touch Panel Does Not Respond to Screen Tap Buttons Do Not Respond Unusual Vertical / Horizontal lines or partial displayBack Light Does Not Turn ON/OFF SD Card cannot be usedWireless Connection GSM / WAP / Gprs not possible PC Connection USB / Serial not possibleIrDA Connection not possible Data Retention related problem Battery Pack does not startBattery discharges quickly even after fully charged Battery Pack does not rechargeNo Sound from Speaker or Distorted sound No Recorded Sound or Distorted sound Housing Cosmetic damage Diagnostic Program Clean Talk TimeStop on fail Checksum Refurbishment Exploded Diagrams & Spare part list Spare part list Appendix Customer, Retailer MisjudgmentResponse HTC confidential Repair Troubleshooting Guide