3-5
CLOSE
-SW
LIMIT
-SW
CN203
CN202
FM+
LD-CD
Q201
IC502
CPLD
M/D
ASSY
IC203
Motor
Drive
CN201
Let’s look over the initial action of M/D...
1) When the tray is closed, CLOSE-SW should
be changed from 5V to 0V and CPLD need to
detect this change
2) Feeding Motor move the P/up to inner area until
the LIMIT SW is detected
3) After CPLD detect the LIMIT SW, CD laser is
turned on and go to the next step
4) if there is a DISC on the tray, the RF will be
detected by the CD laser and go to next step..
Check the CLOSE-SW and LIMIT-SW
if anything of the both is not detected, the next
step won’t go on. This means that even though
there is a DISC on the tray the DISC will not
rotate.
FM+
CLOSE-SW
P/up move
to inner area
Limit sw
detect
CD LD on
Tray close
LIMIT-SW
LD-CD
Check the followings
1) Check the video output mode. if the output
mdoe is progressive - on, there is no compos-
ite signal.
the output mode should be changed to
progressive - off
2) Check the buffer IC and MPEG, and then
replace.
75 Ohm
Composite out
131 pin
IC513
Ziva5.0
(MPEG)
buffer
DC 0V
15.7 Khz
DC0.3V
31.3 Khz
Composite signal is normal --> Screen display OK
Composite signal is abnormal -->there is no screen on TV
7. Checking the initial step of M/D Ass’y
8. Checking the Video Signal
