Slow - Daewoo TVZ 1321 Service Manual

C.
PB video signal missing
Yes
Is envelope output from
IY03 pin 7 ?
Yes
Is signal output from
IY01 pin 36 ?
Yes
Is signal input into
IY01 pin 35 ?
Yes
Is color signal output from
IY01 pin 2 ?
Yes
Is signal input into pin 3 ?
Yes
Is composite video signal
out from IY01 pin 11 ?
Yes
Is composite video signal
input into IY01 pin 9 ?
Yes
Is composite video signal
output from IY01 pin 28 ?
Yes
Check I503 pin 5
PLAY : H, EE : L
Yes
Above circuits ok
No
Is 5V supplied at
IY03 pin 15 ?
Is SW pulse input into
IY03 pin 2 ?
No
Check IY01 pin
24, 27 5V ?
No
Check
QY05, QY04 Check IY01 pin 4
EE mode : L,
PB mode : H
No
No
Change QY01
No
Change IY01
No
Check QY09 and
QY07, QY08, QY10
No
Change IY01
No
Is signal output from
pin 3 of I503?
Check pattern
104
No
Yes
No
Yes
No
Yes
Low
High
Is 5V sup-
Yes
plied to pin
IY02 9, 12 ?
No
Change TR
No
Yes
Check power
circuit
Check IN01
pin 23
Clean head or
change head
Check Power
circuit
Check IN01
pin 36
Change IY01
Is CLOCK
Yes
(3.58MHz)
Supplied at
IY01 pin 18 ?
No
Does XY01
crystal(3.58M
Hz) oscillate ?
No
Change XY01
(15PPM)
Change I503