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33

STM means a power on sequence of software .
and it can check which part is NG 

Step

Software condition

Software start up

Initialize STM

Initialize Clock

Initialize DAIF

Initialize GPIO

Initialize SPI

Initialize RDS

Initialize SPI

Initialize RDS

Initialize Battery

Initialize KBS

System start judgment

Initialize RDS

interrupt is effective

Initialize RF

Initialize DSP

STM

High

Low

High

Low

High

Low

High

Low

High

Low

High

Low

High

Low

High

SRAM

-

-

-

-

-

-

Access

-

Access

Access

-

Access

Access

Access

Access

Access

Low

FLASH

-

-

-

-

-

-

Access

-

Access

-

-

-

-

-

Access

Access

Figure of image of STM port

Waveform of STM port

STM

SRAM_CS/ (IC100 81pin)

FLASH_CS/ (IC102 1pin)

By the Fatal reset, SMT port 
may toggle instantly at this point.

34

* NeedRepair7 is primary battery detection. 
* NeedRepair8 is a confirmation number. This time, there is no implemention.

Need Repair No.

Error

Explanation

Remedy

1

Flash Error
Flash unimplemented / start failure

Flash failure
Fail to start Flash 

Change chassis 

2

Flash ADM Error
Flash ADM block error

Flash failure
Flash management information verification NG

Change chassis

3

Flash Data Error
Flash Data block error

Flash failure
Adjustment data block NG

Change chassis

4

Flash Record Error
Flash Write error

Flash failure
Writing to Flash NG

Change chassis

5

Application Error
Character input mode range error

Flash failure
Check if it's in the range of switching character input mode for phone-
book can be done.
It occurs when adjustment level is out of range. 
Usually this doesn't happen. So it is considered as Flash failure.

Change chassis

6

Download File Error
Download file mismatch 

Flash failure
It occurs when the designation of renewal file of AirDownload is wrong.
Usually this doesn't happen. So it is considered as Flash failure.

Change chassis

9

Download Module Error
Time out as rewriting module while 
AirDownloading

It occurs when only a part of modules are rewritten and failed to down-
load specified times.

Change chassis

10

Const Data Error
Const data Version mismatch

Version mismatch of program and external Flash fixed data

Change chassis

ERROR No.

Error

Explanation

Remedy

1

Fail to delete Flash when AirDownloading.

Flash failure
Fail to delete PFlash or DFlash

Change chassis 

2

Write failure of Flash when AirDownloading.

Flash failure
Fail to write on PFlash or Dflash

Change chassis

35

Shown in Fig.-

To Remove

Remove

1

CABINE COVER

Screws (  

×  )..........(A) × 4

2

Main P.C. Board

Main P.C. Board

Shown in Fig.-

To Remove

Remove

3

LOWER CABINET

Screws (  

×  )..........(B) × 1

4

Main P.C. Board

Main P.C. Board

36

• DECT tester: Rhode & Scorers, CTS 60 is recommended.
• Frequency counter: it must be precise to be able to measure 1Hz (precision; ±4ppm).

Hewlett Packard, 53131A is recommended.

• DC power: it must be able to output at least 1A current under 2.6V for Handset, 9V for Tool.
• Digital multi-meter (DMM): it must be able to measure voltage and current.
• Oscilloscope

• EEPROM serial Tool

Tool: PSZZ1TD7896M

• PC which has “flash program.exe”. Version 1.0