Panasonic PV-D4733S-K, Service Manual

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PV-D4733S-K/PV-D4753S-K/PV-D4763S-K
Spindle Motor Operation Problem
DVD Mechanism Unit is defective.
Replace the DVD Mechanism Unit.
IC8001 on the DVD Main C.B.A. is defective.
Replace IC8001 on the DVD Main C.B.A.
Replace IC8801 on the DVD Main C.B.A.
NG
Replace the IC8001 on the DVD Main C.B.A.
NG
OK
OK OK OK
(DVD Playback) (CD Playback) (DVD-RAM Playback)
DVD Mechanism Unit is defective.
Replace the DVD Mechanism Unit.
NG
NG
OK
OK
Check the signal at TP8808 (SPIN) on the DVD Main
C.B.A.
OK
Still NG
TP8801 TP8802 TP8814
Check the voltage at TP8971 on the DVD Main C.B.A.
Is it +2.2 V ?
Pickup Operation Problem
RF Signal at TP8620
IC8801 on the DVD Main C.B.A. is defective.
Replace IC8801 on the DVD Main C.B.A.
IC8001 on the DVD Main C.B.A. is defective.
Replace IC8001 on the DVD Main C.B.A.
If the Message "PLEASE CHECK THE DISC, AND
FOR STAINS OR SCRATCHES ON DISC" appears.
Check the signal at TP8801 and TP8802 on the DVD
Main C.B.A.
Check the signal at TP8814 on the DVD Main C.B.A.
Traverse Operation Problem
IC8001 on the DVD Main C.B.A. is defective.
Replace IC8001 on the DVD Main C.B.A.
1 V 2 V
V1 0.5 Vp-p V1 2.0 Vp-p V1 1.8 Vp-p
5 ms 5 ms 2 V 5 ms
NG
NG
Confirm Wave form at TP8620
from normal DVD Movie or CD. DVD Mechanism Unit is defective.
Replace the DVD Mechanism Unit.
50 ns 200 mV 0.1 ns 200 mV 50 ns 200 mV
800 mVp-p 800 mVp-p 800 mVp-p
Check the voltage at TP8954 on the DVD Main C.B.A.
Is it become high (+5.0 V) ?
Replace the Q8901 and Q8902
on the DVD Main C.B.A.
Replace the IC8001 on the
DVD Main C.B.A.
NG OK
NG
OK
Note: Check the voltage within 10 to 20 seconds as soon as disc has been inserted. Otherwise, following check can not be
done because the voltage at TP8954, at base of Q8901 return to 0V when the Message "PLEASE CHECK THE DISC,
AND FOR STAINS OR SCRATCHES ON DISC" appears.
OK
Repair the around circuit of "5V-FEP" line.
NG
Check the voltage at emitter of Q8902 on the
DVD Main C.B.A. Is it +5.0 V ?
Check the voltage at base of Q8901 (or R8914) on the
DVD Main C.B.A. Is it become high (more than +2.0 V) ?
TROUBLESHOOTING HINTS