VK Corporation VK2010, Service Manual

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VK Quality Group GSM C/S
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Service Guidelines
Service Guidelines
Precise adjustment should be made in a shield box or shield room where
spurious noise has been eliminated.
When using magnetized tools, note that related magnetic elements may cause
malfunctioning of critical parts(such as IC).
Use a twisted pair wire of thick type when measuring level. Using such a thick
twisted pair wire could reduce the measurement error as the wire contains less RF
resistance.
When disassembling the phone set, you must use a driver tool meeting standard
requirements.
When making repairs with power on after connecting the test package, note
that dangers such as overcurrent, parts deterioration caused by short-circuit may
occur.
Note that PCB land may be detached due to overheating of a soldering iron
while making repairs on board status.
Any additional devices that cause the change of performance shall not be
added to this phone, as registered.