Zenith XBV243 series Service Manual page 33

TROUBLESHOOTING (CONTINUED)
B. No disc
No disc
Power on
Does tray open or close?
YES
Does the pick-up slide
inner or outer track?
YES
Does the pick-up lens
move up and down?
YES
Slide the pick-up to
inner track.
END
VR168 - 923-03485
ELECTRICAL
Check loading Part.
NO
Push Pick-up to inner
track to the end by hand.
Does PMD03 Pin 13
change high to low?
YES
Pressing the open/close key,
check the voltage of IC2M1
Pins 22 change 0V to 5V
YES
Does the voltage change at
PMD03 Pins 1, 3 more than
2V on the basis of 3.8V?
YES
DECK assembly is defective
NO
Check SLED Driver output.
IC201 Pin 88 IC2M1 Pins 35, 36.
NO
Check Focus Driver output.
(IC201 Pin 83, IC2M1 Pins 32, 33)
NO
NO
NO
IC201 Pin 88 no output : IC201 is defective
IC2M1 Pin 19 no output : IC2M1 is defective
IC201 Pin 83 no output : IC201 is defective
IC2M1 Pins 24, 41 no output : IC2M1 is defective
3-21
DECK assembly is
defective. (Limit sw)
check µ-COM Part.
Replace IC2M1.
D35E COMBO - ELECTRICAL