FLOW CHART
39
D. TROUBLESHOOTING OF LUMINANCE SIGNAL IN THE RECORD MODE.
NO
TO EE MODE
NO
Is the modulated luminance
signal from pin
8
of IC301
fed to pin
5
of IC401?
Check R304, C314
NO
NO
YES
YES
NO
NO
YES
Is the luminance signal from
pin
Q
fed to pin
q
of IC301?
Is C316, Q302, R309, R308,
R307, C312, C390 correct?
Change damaged
components
Check IC301
YES
YES
NO
YES
Change damaged
components
Check IC301
YES
NO
Is the luminance signal from pin
q
of fed to pin
8
of IC301?
YES
TO PRE-AMP CIRCUIT
IN THE REC MODE
Is TRICK(H) supplied to
anode of D510 at zero volt?
NO
YES
Check IC301
Check TRICK(H)
Check the ON/OFF +5V
Is ON/OFF +5V supplied to
pin
y
and pin
}
of
IC301?
Is the obtained from
pin
t
of IC301?
Is the signal from pin
t
of
IC301 fed to pin
Q
of IC301?
Is C322 correct?
* 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)
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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...
