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GRUNDIG Service
6. Front Control Trouble Service Flow Chart
Front Control Trouble
Check between JP1 and J1
Connection
OK
Check Between JP2 and CN3
Connection
OK
Check U2 Pin14/27/38 Voltage
OK
Check U2 Pin5/6/8/9 Signal
OK
Check U2 SEG/GRID Signal
OK
Check U1 F11/F22 Voltage
OK
Replace U1
NG
Replace Connection
NG
Replace Connection
NG
Check Power Supply
NG
Check Main Board
NG
Replace U2
NG
Check Power Supply
7. Remote Control Trouble Service Flow Chart
Remote Control Trouble
Check Remote Control
OK
Check U3 Pin2 Voltage
OK
Check U3 Pin3 Output Signal
OK
Check U1 Pin83 Input Signal
OK
Check Main Board / U1
2 - 22
GDP 2200
NG
Replace Battery
NG
Replace Remote Control
NG
Check Power Supply
NG
Replace U3
NG
Replace L3
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