FLOW CHART
37
B. TROUBLESHOOTING OF PRE-AMP IN THE PLAYBACK MODE.
Is the signal from heads
fed to pin
%
and pin
&
(SP mode) or pin
!
and
pin
#
(LP mode) of P402?
NO
Is ON/OFF +5V from pin
c
of IC301 supplied to pin
9
of IC401 at 5volt?
Check the ON/OFF +5V
NO
YES
Check the drum and
deck mechanism
NO
Check H.A SW
NO
Is REC(H) from pin
9
of IC301 supplied to pin
7
of IC401 at zero volt?
Is the H.A SW from
6
from
IC501 supplied to pin
#
of IC401?
Check REC(H)
YES
NO
Is V.SW from pin
8
of
IC501 supplied to pin
)
of IC401?
Check V.SW
YES
NO
Is TRICK(H) from pin
W
of IC501 supplied pin
&
of
IC401 at zero volt?
Check TRICK(H)
NO
Is the signal from pin
!
and pin
#
(LP mode) or pin
%
and
pin
&
of P402 fed to pin
7
or
pin
‘
of IC401?
Change IC401
YES
YES
YES
NO
•REC(H)
:"HIGH" in the REC mode
"LOW" in the EE and PB mode.
•H.A SW
:"HIGH" in the LP mode
"LOW" in the SP mode.
•TRICK(H)
:"HIGH" in the trick play
"LOW" in the except trick play.
* The pin # of IC401 is changed according to SET.
DV-K884W (6 Heads) : LA70020 (36PIN DIP)
DV-K484W (4 Heads) : LA70011 (24PIN DIP)
DV-K284W (2 Heads) : LA70001 (24PIN DIP)
NOTE
Is the signal from pin
3
of IC401 fed to C355?
Check Q305 and adjacent
circuit
YES
YES
TO LUMINANCE SIGNAL
IN THE REC MODE
¡
NOTE: Refer to 74page, Hi-Fi/PRE-AMP CIRCUIT DIAGRAM.
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...
