44
FLOW CHART
NO
Is the video signal obtained
from pin 8 of IC602
(AV SW circuit)?
Check ON/OFF 5V
YES
Is ON/OFF 5V supplied to pin 36
and pin 47 of IC301 at 5 volts?
To PREAMP circuit
YES
NO
Is Q302, Q368, Q369 and
R308, R307, C312 correct?
Change damaged
components
Check IC301
Check TRICK(H)
Check IC301
Is the video signal from pin 35
of IC301 fed to pin 25 of IC301?
YES
YES
NO
YES
NO
NO
Is TRICK(H) supplied to
anode of D302 at zero volt?
Is the luminance signal from pin 26
of IC301 fed to pin 18 of IC301?
YES
YES
Check AV SW circuit
NO
NO
Check R304, C314
Is the modulating luminance
signal from pin 18 of IC301
fed to pin 9 of IC401?
NO
Check PCB pattern and
adjacent circuits.
Is the video signal from pin
8 of IC602 fed to pin 35
of IC301?
YES
NO
Check C315
Is the luminance signal from pin 25
of IC301 fed to pin 26 of IC301?
YES
D. TROUBLESHOOTING OF LUMINANCE SIGNAL IN THE RECORD MODE.
Summary of Contents for DV-K88 series
Page 71: ...68 CIRCUIT DIAGRAMS 9 1 Connection Diagram SECTION 9 CIRCUIT DIAGRAM 68...
Page 72: ...69 CIRCUIT DIAGRAMS R819 5 1 9 2 Power Circuit Diagram...
Page 73: ...70 CIRCUIT DIAGRAMS 9 3 Syscon and Logic Circuit Diagram...
Page 74: ...71 CIRCUIT DIAGRAMS 9 4 AV SW Circuit Diagram...
Page 75: ...72 CIRCUIT DIAGRAMS 9 5 IF PDC Circuit Diagram TM...
Page 76: ...73 CIRCUIT DIAGRAMS 9 6 If Module Circuit Diagram A2...
Page 77: ...74 CIRCUIT DIAGRAMS 9 7 If Module Circuit Diagram Nicam...
Page 78: ...75 CIRCUIT DIAGRAMS 9 8 Hi Fi Pre Amp Circuit Diagram...
Page 79: ...76 CIRCUIT DIAGRAMS 9 9 Video Audio Circuit Diagram...
Page 80: ...77 CIRCUIT DIAGRAMS 9 10 Remocon Circuit Diagram...
Page 81: ...SECTION 10 COMPONENTS LOCATION GUIDE ON PCB BOTTOM VIEW 78 P C B LOCATION 10 1 PCB Main...
Page 82: ...80 P C B LOCATION 10 3 PCB Logic DV K8K S S Series DV K86 S S Series DV K82 S S Series...
Page 83: ...81 P C B LOCATION DV K88 S S Series...
Page 84: ...SECTION 11 DISASSEMBLY 83 DISASSEMBLY 11 1 Packing Ass y...
Page 85: ...84 DIAGRAMS DV K88 Series DV K82 Series DV K8K Series DV K86 Series 11 2 Front Panel Assembly...
