FLOW CHART
22
B. TROUBLESHOOTING OF RF MODULATOR OUT
NO
NO
NO
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
Is Video Signal Video In point,
Pin No. 6 of TM Block?
Is Audio signal at Audio In point,
Pin No.2 of TM Block?
Check the A/V Switching, Video
and Audio Circduit.
Correct the Option.
Check on/off 5V and Power
Supply circuit.
Check D171 and Power
Supply circuit.
Check the
µ
-COM port, SDA.
Are RF OUT System and RF Out
channel selected well by menu key.
Select the RIGHT System and
channel by menu key.
Is system Select Option Diode
applied well according to Option
Table?
Is +5V supplied to MB point,
Pin No. 4 of TM Block?
Is +30V supplied to TU(MD) point,
Pin No. 7 of TM Block?
YES
Change the TM Block.
Is Serial Data supplied to
SDA points, Pin No. 3 of
TM Block?
YES
NO
Check the
µ
-COM port, SCL.
Is Serial Clock supplied to
SCL points, Pin No. 5 of
TM Block?
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...
