KV-29FX60A - Sony TV Service Manual (repair manual). Page 6

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Device acknowledge is used to check IIC errors. Device acknowledge is checked by sending an IIC start sequence during CRT power on. Each 
device is checked three times, if there is no acknowledge after every attempt, it will be regarded as an error.
There are three steps to check errors

1. IIC line 0

If all devices except the NVM have errors, IIC line 0 error is displayed

2. Board check

If all devices mounted on one board have errors, board error is displayed

3. Each device check

If IIC line error and board error are not detected then the device with an error is displayed

The detected errors can be displayed as follows:

1. Error Monitor Menu
2. Error Reader

The error monitor menu is displayed by selecting TT33. The following menu will be displayed:

930360h 15h

1. 100h = A-Board
2. 401h = BP-B CXD2069 MID
3. 704h = J-B TDA9320 Main Col Dec
4. 000h = no error occured
5. 000h = no error occured

New error code sequence is starting

Ignore Errors :                                 [off]