HMZ-T2 (serv.man2) - Sony Audio Service Manual (repair manual). Page 6

1-3E

1-4.　 Power Indicator Alarm

1-3.　 Verifying Checksums for updated Firmware

If the system trouble occors when using the unit, the power indicator keeps flashing in red as follows.

Problem

Power Indicator status

  System error

  ・communication error between systems.

  The indicator flashes twice every 3 seconds.

  FEBOX temp. alarm
  ・Overheat of the Processor Unit  

  The indicator flashes three times every 3 seconds until 
  the unit cools down.

  HMU temp. alarm
  ・Overheat of the Head Mounted Unit

  

The indicator flashes four times every 3 seconds for

  a minute.

  FEBOX/HMU temp. alarm
  ・Overheat of both the processor unit and
     head mounted unit at the same time.

  

The indicator flashes five times every 3 seconds for

  a minute.

[Note]
1. The indication of "system error" precedes the "Temp. alarm" when those errors occur same time.

1) Enter service mode, and move the cursor to cmd 10. (Fig.-5)
2) Press [↓] 2 times.
3) cmd 11 and cmd 12 are displayed.
    (Displaying them may take several seconds.)
4) The CheckSum Info screen is displayed. (Fig.-6)
5) Verify that the checksums for updated firmware are correct.

Clear Background

Version
cmd 1

Background clear mode.

cmd 2
cmd 3

on

cmd 4

off

cmd 5
cmd 6
cmd 7
cmd 8
cmd 9

cmd 10

Fig.-5

Fig.-6

CheckSum Info

cmd 2
cmd 3

main.bin

：**.**.**.**

cmd 4

bitmap.bin ：**.**.**.**

cmd 5

ext.bin

：**.**.**.**

cmd 6

adspi.bin

：**.**.**.**

cmd 7

adspo.bin

：**.**.**.**

cmd 8

en.ttf

：**.**.**.**

cmd 9

jp.ttf

：**.**.**.**

cmd 10

china.ttf

：**.**.**.**

cmd 11

cmd 12

・Verify these 8 checksums.

・For details on checksums, contact

   Sony service HQ.