HDR-GW55VE, HDR-GW77, HDR-GW77E, HDR-GW77V, HDR-GW77VE (serv.man2) - Sony Movie Service Manual (repair manual). Page 11

HDR-GW55VE/GW77/GW77E/GW77V/GW77VE_L2

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Perform by following procedure
1.   Confirm that there are not any dust on the BT lid.
 

          ↓

 

Confirm that there is not any dust on the vacuum pad.

 

          ↓

 

Cover the microphone hole so as not to damage the Microphone Sheet.

 

(Cover the microphone hole with silicon sheet for radiation(4-174-010-01 etc.) )

 

          ↓

 

Expand the suction time for 60 seconds, and perform the measurement again.

2.  Check the cabinet condition, and then perform the measurement again.
3.  If there is no improvement symptom, replace the cabinet (L) assy and the cabinet (R) block assy or panel block assy, and perform the measurement 

again

To maintain the water-proof performance, we recommend that once a year you take the camcorder to your dealer, or to an authorized repair shop, 
to have the sealing gasket of the battery/memory card/jack cover replaced for a fee.

Instruction manual recommends the periodic maintenance as shown above.
If there is the request for check, perform the procedure below.

Checking Items
•  Confirm that there is no air-leak.
•  Confirm that there is no strain on the exterior.
•  Confirm that there is not any dust on the BT lid.
•  Replace the BT Lid packing.

1.  Remove the two fixed screws of BT Lid Packing.

Screw

2.  Remove the packing, and confirm that there is no scratch such as defect on the BT Lid Cover or BT Lid Packing Fixed Plate.

Screw

Packing (BT Lid)

3.  Install the new BT Lid Packing. (also use the new screws)

Note: Be careful that there is no dust on the packing.

Note the following when replacing the board.

Note:  When replacing the board, it is necessary to change the destination data first. 
 

To change the destination data, execute the [DESTINATION DATA WRITE] of ADJUST tab in the Adjust Manual.

When you replace to the repairing board, the written destination data of repairing board also might be changed to original setting.
Start the Adjust Manual in the Adjust Station and execute the “DESTINATION DATA WRITE”.
After the board replacement, the error of the built-in recording media may be displayed. In this case, execute the [DESTINATION DATA WRITE]
then the error will be cleared. If it is not cleared with [DESTINATION DATA WRITE], format the built-in recording media.

When you replace to the repairing board, get the data from the former one.
Start the Adjust Manual in the Adjust Station and perform “USB SERIAL SAVE” to get the data.

The set is shipped with a unique ID (USB Serial No.) written in it.
This ID has not been written in a new board for service, and therefore it must be entered after the board replacement.
Start the Adjust Manual in the Adjust Station and execute the “USB SERIAL No. INPUT”.

After the board replacement, execute the procedure below first.
1.  Execute the [DESTINATION DATA WRITE] of ADJUST tab in the Adjust Manual.
2.  Execute the script files below. (Refer to the flowchart in Fig. 1)

• 11DdmMmcReadTestMINI_v4.vbe
• 11DdmMmcMakePartition_v4.vbe

Note:  Download the script files from TISS Homepage.
 

When searching in the TISS Homepage, enter “IM_VC_TOOL” for keyword in the Part Number field.

Unless these script files are executed, the following symptoms may appear.
Make sure execute the above script files.
•  The internal memory is not recognized as a media.
•  The management file saved in the internal memory model cannot be repaired.
•  The internal memory cannot be formatted.