FLOW CHART
33
B. TROUBLESHOOTING OF REC MODE
No sound in the playback
mode after recording
YES
NO
YES
NO
Is signal input into pin
X
of IC301?
Check Hi-Fi,
A/V select circuit
YES
NO
Is the voltage above 4V
at pin
b
of IC301?
Is clock and data applied
to pin
K
,
k
of IC301?
NO
Check SYSCON
YES
NO
Is signal input into
pin
B
of IC301?
Check R204, R205 C209
NO
Change IC301
YES
YES
NO
Does pin
^
of T201
oscillate?
Is the volltage from 0.7V
to 3.0V at pin
%
of IC301?
NO
AC signal put on 70KHz
at base of Q201
Check IC301
Clean HEAD
Check R212, R213,
C211, T201
NO
Check Q205
Check AC Head
NO
Check IC301
NO
NO
Check IC201
Is 5V applied to pin
c
of IC301 and is 5.8V
applied to pin
@
of IC301
Check SYSCON
YES
YES
YES
YES
YES
YES
YES
AC signal is put on the DC
voltage at pin
%
of IC301
Is the volltage from 0.7V
to 0.8V at pin
^
of IC301?
Is the volltage higher than
3.0V at collector of Q205?
Summary of Contents for DV-K*84W Series
Page 71: ...CIRCUIT DIAGRAMS 68 SECTION 9 CIRCUIT DIAGRAM 9 1 CONNECTION DIAGRAM DV K884W K484W K284W...
Page 72: ...CIRCUIT DIAGRAMS 69 9 2 POWER CIRCUIT DIAGRAM DV K884W K484W K284W...
Page 73: ...CIRCUIT DIAGRAMS 70 9 3 SYSCON AND LOGIC CIRCUIT DIAGRAM...
Page 74: ...CIRCUIT DIAGRAMS 71 9 4 PIF CIRCUIT DIAGRAM DV K884W K484W K284W...
Page 75: ...CIRCUIT DIAGRAMS 72 9 5 IF MPX MODULE CIRCUIT DIAGRAM DV K884W K484W K284W...
Page 76: ...CIRCUIT DIAGRAMS 73 9 6 VIDEO AUDIO CIRCUIT DIAGRAM DV K884W K484W K284W...
Page 77: ...CIRCUIT DIAGRAMS 74 9 7 Hi Fi PRE AMP CIRCUIT DIAGRAM DV K884W K484W K284W...
Page 78: ...DISASSEMBLY 79 SECTION 11 DISASSEMBLY 11 1 PACKING ASS Y...
