85
TROUBLESHOOTING GUIDES (Continued)
Is envelope output from
ICA01 pin
)
?
YES
NO
D.
Is signal input at IC301
pin
1
,
5
?
YES
NO
Is signal output from
IC301 pin
8
,
0
?
YES
YES
Is signal input into
IC301 pin
‘
?
YES
NO
YES
Is signal output
from IC301 pin
E
?
YES
Is signal input into
e
?
Is composite video signal
out from IC301 pin
t
?
YES
Is composite video signal
input into IC301 pin
r
?
YES
Is composite video signal
output from IC301 pin
I
?
YES
Check OSD circuit
NO
NO
YES
NO
Low
High
NO
YES
NO
YES
NO
NO
NO
NO
NO
NO
YES
YES
Is 5V supplied at
ICA01 pin
5
?
Check PCB
pattern
Check IC301
pin
y
,
]
5V?
Check IC301 pin
q
EE mode: L
PB mode: H
Check power
circuit
Is SW pulse input into
ICA01 pin
%
?
Check IC601
pin
8
Check Power
circuit
Check IC601
pin
p
Change IC301
Check Q301
Change IC301
Change IC301
Is composite video
signal output from
IC302 pin
#
?
Is 5V supplied
to IC302 pin
*
?
Is CLOCK
(3.58MHz)
Supplied at
IC303 pin
%
?
Does X301
crystal (3.58MHz)
oscillate?
Change X301
(15PPM)
Check Q351
Clean head or
change head
PB video signal missing (4-head and 4-head Hi Fi model)
Summary of Contents for DV- K504N-SJ
Page 35: ...34 AC001 K584NZ SJ M K584NZ SG M only...
Page 36: ...35...
Page 37: ...36...
Page 38: ...37...
Page 39: ...38...
Page 60: ...59 ELECTRICAL ADJUSTMENTS Fig 1 Circuit Board Location...
Page 92: ...91 INTERCONNECT WIRING DIAGRAM K584N K484N K384N K284N...
Page 93: ...92 POWER SUPPLY SCHEMATIC DIAGRAM FREE VOLTAGE K584NY SJ M K584NZ SJ M K584NZ SG M...
Page 95: ...94 2HD HEAD AMP SCHEMATIC DIAGRAM K384N K284N K304N...
Page 96: ...95 4HD HEAD AMP SCHEMATIC DIAGRAM K584N K484N K504N...
Page 97: ...96 VIDEO AUDIO SCHEMATIC DIAGRAM K584N K484N K384N K284N K504N K304N...
Page 98: ...97 PIF INPUT SELECTOR SCHEMATIC DIAGRAM 9V USE K584NY SJ M K584NZ SJ M K584NZ SG M...
Page 100: ...99 TIMER SYSCON SCHEMATIC DIAGRAM K584N K484N K384N K284N K504N K304N...
Page 101: ...100 POWER SUPPLY BLOCK DIAGRAM FREE VOLTAGE K584NY SJ M K584NZ SJ M K584NZ SG M...
Page 103: ...102 2HD HEAD AMP BLOCK DIAGRAM K384N K284N K304N...
Page 104: ...103 4HD HEAD AMP BLOCK DIAGRAM K584N K484N K504N...
Page 105: ...104 VIDEO AUDIO BLOCK DIAGRAM K584N K484N K384N K284N K504N K304N...
Page 106: ...105 PIF INPUT SELECTOR BLOCK DIAGRAM K584N K484N K384N K284N K504N K304N...
Page 109: ...108 MAIN PCB 2HEAD 4HEAD...