DMC-TZ18EB, DMC-TZ18EE, DMC-TZ18EF, DMC-TZ18EG, DMC-TZ18EP, DMC-TZ18GC, DMC-TZ18GN, DMC-TZ18PR, DMC-ZS8P, DMC-ZS8PC, DMC-ZS8PU, DMC-ZS8GH, DMC-ZS8GK - Panasonic Digital Camera Service Manual (repair manual). Page 10

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3.4.
How to Define the Model Suffix (NTSC or PAL model)
There are six kinds of DMC-TZ18/ZS8, regardless of the colours. 
• a) DMC-ZS8P/PC 
• b) DMC-TZ18EB/EF/EG/EP 
• c) DMC-TZ18EE 
• d) DMC-TZ18GN 
• e) DMC-ZS8GK 
• f ) DMC-TZ18GC/PR, ZS8GH/PU
What is the difference is that the "INITIAL SETTINGS" data which is stored in Flash ROM mounted on Main P.C.B. 
3.4.1.
Defining methods
To define the model suffix to be serviced, refer to the nameplate which is putted on the bottom side of the Unit.
Note:
After replacing the MAIN P.C.B., be sure to achieve adjustment. 
The Maintenance software (DIAS) is available at "software download" on the "Support Information from NWBG/VDBG-AVC"
web-site in "TSN system". 
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