CIRCUIT DIAGRAM
1. POWER(SMPS) CIRCUIT DIAGRAM
IC903 PIN3 (AC110V, PLAY) IC901 PIN3 (AC110V, STAND-BY)
IC901 is defective.
Power dead.
NOTES) |
Warning |
NOTES) |
Parts that are shaded are critical |
NOTES) |
With respect to risk of fire or |
NOTES) |
electricial shock. |
IMPORTANT SAFETY NOTICE |
NAL CIRCUIT SPECIAL COMPONTS ARE SHADED ON |
NOTE : |
|||
WHEN SERVICING THIS CHASSIS, UNDER NO CIR- |
THE SCHEMATIC FOR EASY IDENTIFICATION. |
1. Shaded( |
|
) parts are critical for safety. Replace only |
|
|
|||||
THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIF- |
with specified part number. |
||||
CUMSTANCES SHOULD THE ORIGINAL DESIGN BE |
|||||
FER FROM THE ACTUAL CIRCUIT USED. THIS WAY, |
2. Voltages are DC-measured with a digital voltmeter |
||||
MODIFIED OR ALTETED WITHOUT PERMISSION |
IMPLEMENTATION OF THE LATEST SAFETY AND |
during Play mode. |
|||
FROM THE ZENITH ELECTRONICS CORPORATION |
PERFORMANCE IMPROVEMENT CHANGES INTO |
|
|
|
|
ALL COMPONENTS SHOULD BE REPLACED ONLY |
THE SET IS NOT DELAYED UNTIL THE NEW SERVICE |
|
|
|
|
WITH TYPES IDENTICAL TO THOSE IN THE ORIGI- |
LITERATURE IS PRINTED. |
|
|
|
|
IC902 is defective. |
|
|
|
|
Q908, R928, D913 and Q909 are defective. |
||||||||||||||
8V Power Line dead. |
|
|
|
|
5V Power Line dead. |
|
|||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
C927, R918, R922 and IC905 are defective.
Power dead.
Q903, Q904 are defective.
Power control is abnormal.
Q901 and Q902 are defective.
FLD(+), FLD(-) are dead.
3-18 |
3-19 |
2. RF & DVD DSP CIRCUIT DIAGRAM |
IC209 is defective |
|
AD Converter Error |
Q202 is defective. |
IC204 is defective |
DVD LD will not be on. |
being slipped during search. |
RF/TE/FE Signal |
generation |
Q203 is defective
CD LD will not be on
Spindle Low
Pass Filter
TZC Mirr.
Generator
Digital Servo DSP/ CD Decoder
DRAM
AD Ref.
Voltage Gen
3.3V Regulator
IC403 is defective
No Spindle Full Speed
IC219 is defective
Servo will not operate
T.E |
R.F |
FOCUS LOOP |
SPINDLE LOOP |
F.E |
TRACKING LOOP |
SLED LOOP |
|
3-20 |
3-21 |
3. DRIVE CIRCUIT DIAGRAM
SPINDLE
MOTOR DRIVE
SPINDLE |
FOCUS |
TRACKING |
SLIED |
DOOR |
|
3-22 |
3-23 |
Loading...