DOWNLOAD Sony ICD-MX20DR9 Service Manual ↓ Size: 2.52 MB | Pages: 38 in PDF or view online for FREE

Model
ICD-MX20DR9
Pages
38
Size
2.52 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
icd-mx20dr9.pdf
Date

Sony ICD-MX20DR9 Service Manual ▷ View online

8
ICD-MX20DR9
2-7. SWITCH BOARD
2-8. MAIN BOARD, SWITCH UNIT
5
SWITCH board
1
connector (CN9502)
4
connector (CN9902)
3
two claws
2
spacer (pc board A) 
2
 connector (CN9101)
3
 connector (CN9904)
5
 connector (CN4103)
6
 four claws
4
MAIN board, switch unit
1
Peel off the adhesive sheet 
     on the  back of the switch unit.
qs
switch unit
qh
MAIN board
qf
Peel off the adhesive part.
qg
guide (connector)
qd
two dowels
qa
LCD holder
q;
two dowels
7
Peel off the adhesive part.
9
liquid crystal display panel
8
light guide plate
9
ICD-MX20DR9
2-9. AUDIO BOARD, MEMORY BOARD
2
screw
3
AUDIO board
7
MEMORY board 
1
cover (chassis)
6
battery terminal (+)
5
battery terminal (–)
4
Remove the
     two solderings.
10
ICD-MX20DR9
[Test Mode]
The following checks can be implemented using the Test Mode.
How to Enter the Test Mode
To enter the test mode, turn ON the  HOLD  switch while pressing
the  MENU  key and  VOLUME +  key at the same time with the
power on.
How to Exit the Test Mode
Exit the test mode by turning OFF the power.
Initial Status of the Test Mode
When the machine enters the test mode, the LCD display appears
as shown below.
Select the desired item by using the  > / .  key, and press the
Nx  button to set the selection.
1.  Version test
Version of the respective modules are verified.
2.  Key Chk + Format test
Perform the key check by pressing the keys. The NAND
formatting (deleting all events) and the default settings of the
menus (default language and LCD contrast remain unchanged)
are executed at the same time.
*
Nx  /  >  /  .  / MENU / 
  / REC/PAUSE zX  /
STOP x / VOLUME + / VOLUME – / DIVIDE / A-B 
  /
DPC (ON/OFF) / VOICE UP (ON/OFF) /
DIRECTNT (ON/OFF) / HOLD
3.  Language test
Check the language and select the language. (Default language
is Japanese.)
Press  VOLUME +  button for English (ENG).
Press  A-B 
  button for Japanese (JPN).
4.  Loop Back test
Execute the DSP LOOP BACK.
5.  Beep test
Beep sound of 1.3 kHz or 2 kHz is output.
Press the  Nx  key to start outputting and press the  x  button
to stop.
6.  LCD Cont test
Adjust the LCD contrast.
Default value is 07.
Adjust the LCD contrast using the > / . key.
7.  RTC Int test
Perform the self test of the RTC..
8.  Battery test
The detected A/D value of the battery remaining power is
checked.
Selecting items.
setting by the
button
F/W version of
CPU (ARM block)
F/W version of
CPU (DSP block)
F/W version of
SUB-SPU
The checked key is display.
When all checks are completed,
the back-Light turns on for 0.5 
seconds
The NAND formatting 
(deleting all events)
and the befault settings
of the menus are completed.
Total of 15 keys* are counted.
SECTION 3
TEST  MODE
11
ICD-MX20DR9
9.  DC-IN test
The present A/D value of the DC-IN signal is checked.
When the external DC-IN is not connected, NG is display.
10.  VBUS test
Presence/absence of the VBUS is checked.
If it is connected, OK is display.
11.  Sleep test
Sleep is tested.
Note:
When < Sleep > is selected, the machine enter the sleep mode.
To exit the sleep mode, turn off the power.
12.  Log Output test
This is the log output to be used for engineering design.
Note:
Not used.
13.  Key Chk test
Key check only is executed when the key is pressed.
[F/W Upgrade Method]
When upgrading of the F/W becomes necessary for bug corrrection
and others, perform upgrading as described below.
1. Copy the following files into the destination that is immediately
below the Memory Stick Duo drive.
(The following files will be distributed as necessitated when
bug fix becomes necessary.)
• ldrasm.mot (Upgrade driver)
• CHIPEXEC.MOT (F/W of the product)
• update.pls (Upgrade MS identification file)
2. Insert the Memory Stick Duo that is prepared in step 1 into
the Memory Stick slot of the product. Then turn on the power.
(Use either a new battery or the AC adapter.)
3. While the screen showing the access menu is being displayed,
leave the machine as it is. The OPE-LED (red) lights on and it
turns off after about one minute.
Then remove the battery or disconnect the AC adapter. Remove
the Memory Stick Duo. This completes the F/W upgrade. Use
the test mode to check the version number of the F/W.
4. Once the upgrading is executed, the update.pls file will be
automatically deleted.
If you want to repeat the F/W upgrading, copy the update.pls
file again in the Memory Stick Duo.
Supplementary information:
If you want to a great many number of products, copy the
testmode.ind file additionally that enables repetition of the
upgrading.
• ldrasm.mot (Upgrade driver)
• CHIPEXEC.MOT (F/W of the product)
• update.pls (Upgrade MS identification file)
• testmode.ind (Special file to be used in assembly factory)
Note:
Never turn off the power while upgrading is in progress. If the power
is turned off or if the Memory Stick Duo is removed while the
upgrading is in progress, the upgrading will end with failure. (It can
result in defective operations such as power cannot be turned on, or
operation becomes strange.)
In such a case, the product must be disassembled and the upgrading
is required. Please contact us for more details in such a case.
The following files can be created by creating an arbitrary text file
and by changing the file name.
• update.pls (Upgrade MS identification file)
• testmode.ind (Special file to be used in assembly factory)
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