Yamaha YPT-340 Service-Handbuch - Seite 24

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PSR-E343/PSR-E344/YPT-340
DMLCD Circuit Board Test Method
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The DMLCD Circuit Board is provided with test points for service check purposes.
Check the test points on the DMLCD Circuit Board if the following symptoms appear.
Symptoms and check items
No LCD display with Power SW ON -- > Check items 1 to 7 sequentially
1)
No sound or distorted sound -- > Check items 3, 5, 8 and 9, and OUTPUT check items.
2)
Test Point
  Note : Use the standard AC adapter PA-130 or PA-130A for check operation.
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