Panasonic PV-D4742 - Page 150

TROUBLESHOOTING HINTS
PV-D4742
OK
Replace IC8403.
Cause: Audio DAC Problem
Check voltage at TP8022 on the
DVD Decoder C.B.A.
Is it +5.0V ?
Check signal at TP8416 on the
DVD Decoder C.B.A.
(27 MHz clock)
NG
Check Power line.
OK
Check X8501.
NG
Replace X8501.
NG
Replace IC8502.
OK
(BUFFER)(AUDIO D/A CONVERTER)
Cause: EEPROM
Problem
Check voltage at TP8051 on the
DVD Decoder C.B.A.
Is it +5.0V ?
Check Power line.
NG
OK
Replace IC8001.
Cause: Flash ROM Problem
Check voltage at TP8301 on the
DVD Decoder C.B.A.
Is it +3.6V ?
NG
Check Power line.
OK
Replace IC8301.
(EEPROM)
(FLASH MEMORY)
1 V 20 ns
V1 3.1 Vp-p
1 V 20 ns
V1 2.2 Vp-p
1 V 20 ns
V1 3.1 Vp-p
TP8006 TP8207
TP8416