23
TROUBLESHOOTING
i. No Hi-Fi playback in record/playback mode (REC MODE)
Are there Audio signal
at IC251 pin#2~11?
Is FM OSC signal at IC251
pin#36?
Check input SCART JACK.
Check input front jack.
Check ICD02(DVD).
Replace DRUM.
YES
NO
NO
NO
Is FM OSC signal at P401 pin#2?
Replace IC251
YES
HEAD CLEANING.
YES
j. No NORMAL AUDIO playback (PLAY MODE)
Is Playback Audio signal at
IC301 pin#11?
Replace IC251.
YES
NO
NO
Is there Playback Normal Audio
signal at IC251 pin #16,17?
Check A/C HEAD and IC301
YES
Check Output JACK.
YES
Is there normal Audio signal at
IC251 pin#17, 18?
NO
Check power circuit.
NO
Voltage at IC251 pin#34 is 12V?
Voltage at IC251 pin#40 and at
IC301 pin#18 is 5V?
k. No Sound in JK101 COAXIAL Jack.
Pin #25 of P302 is Digital
signal SPDIF?
Check JK102 and PCB pattern.
Check Digital board.
YES
NO
Summary of Contents for DF-4500
Page 5: ...4 TROUBLESHOOTING 2 SYSTEM CIRCUIT...
Page 6: ...5 TROUBLESHOOTING P303 Check REMOCON_IN Pin2...
Page 7: ...6 TROUBLESHOOTING B Digital Board Mpeg...
Page 28: ...27 CIRCUIT DIAGRAM 1 SERVO SYSCON SCHEMATIC DIAGRAM VE1 0 PAL RW COMBO...
Page 29: ...28 CIRCUIT DIAGRAM 2 AV IC SCHEMATIC DIAGRAM VE1 0 PAL RW COMBO...
Page 30: ...29 CIRCUIT DIAGRAM 3 Hi Fi SW IN OUT CIRCUIT SCHEMATIC DIAGRAM VE1 0 PAL RW COMBO...
Page 31: ...30 4 ADC DAC VIDEO AMP IC SCHEMATIC DIAGRAM VE1 0 PAL RW COMBO CIRCUIT DIAGRAM...
Page 32: ...31 CIRCUIT DIAGRAM 5 FRONT PART SCHEMATIC DIAGRAM VE1 0 PAL RW COMBO...
Page 33: ...32 CIRCUIT DIAGRAM 6 TUNER NICAM SCHEMATIC DIAGRAM VE1 0 PAL RW COMBO...
Page 34: ...33 CIRCUIT DIAGRAM 7 POWER SUPPLY SCHEMATIC DIAGRAM...
Page 46: ...45 PCB CIRCUIT BOARD 1 MAIN Analog board PCB...
Page 47: ...2 POWER PCB PCB CIRCUIT BOARD 46...
Page 48: ...47 PCB CIRCUIT BOARD 3 Mpeg Digital board PCB...
