12
PV-DF204/PV-DF2004/PV-DF2004-K/PV-DF274/PV-DF2704/PV-DF2704-K
TROUBLESHOOTING HINTS
How to confirm whether DVD circuit or other circuits is defective.
1) Confirm DVD operation and VCR operation
OK
OK
Playback the test DVD disc.
The Message "PLEASE CHECK THE DISC, AND
FOR STAINS OR SCRATCHES ON DISC" appears.
Confirm communication between DVD Main C.B.A.
and Main C.B.A. by referring to "Communication Timing
Chart 2."
Confirm that the OPEN/CLOSE TRAY works correctly.
Check points:
Pin 48 of IC6001 on the Main C.B.A.
(DVD_POWER_ON(H))
300 ms
1. Output Signal from DVD Main C.B.A.
(TP8006 (DVD_SCK) on the DVD Main C.B.A.)
Troubleshooting Hints
DVD Main C.B.A. is defective.
NG
Repair the DVD Main C.B.A.
IC8001 or the circuit around it is defective.
DVD Mechanism Unit or IC8801 is defective.
DVD Mechanism Unit or IC8801 or IC8001 is defective.
NG
Repair it by referring to the "Tray Operation Problem. "
DVD Mechanism Unit is defective.
Replace the DVD Mechanism Unit.
Repair it referring to "Spindle Motor Operation Problem,"
and " Traverse Operation Problem," "Cause: Pickup
Problem."
If there is problem with audio
or picture, even though it plays
back.
DVD Main C.B.A. is defective.
Repair DVD Main C.B.A.
1. Playback a VHS tape.
DVD circuit is defective.
Main C.B.A. is defective.
Both NG
No PB VCR only
No PB DVD only
How to confirm whether DVD Mechanism Unit or DVD Main C.B.A. is defective.
NOTE:
Host communication may not occur correctly between IC6001 on the Main C.B.A. and IC8001 on the DVD Main C.B.A.
when there is a problem on the DVD Main C.B.A.
(Serial Data Communication failure between IC6001 and IC8001 within 30sec. IC6001 will switch automatically to VCR.)
(Check the VCR mode and DVD mode.)
Check the voltage during the 30 seconds during which the unit remains in DVD mode.
First, confirm that the Main C.B.A. is O.K. other than DVD
Mechanism Unit and DVD Main C.B.A. by referring to
"Communication Timing Chart 1," and "Communication
Timing Chart 2."
Check points:
1. All Power Supply Voltages for DVD circuit
(TP8011 (SW_3.3V_DVD), TP8523 (SW_5V_DVD),
TP8813 (M_VM_6V), Pin3 of P8402 (ACT_VM_5V)
on the DVD Main C.B.A.)
2. Output Signal from DVD Main C.B.A.(TP8009 (D_RDY)),
Output Signal from Main C.B.A.(TP8005 (H_RDY))
(TP8009 (D_RDY), TP8005 (H_RDY) on the DVD Main C.B.A.)
2. Playback a DVD disc.
Repair the Main C.B.A.
Main C.B.A. is defective.
NG
Repair the Main C.B.A.
Main C.B.A. is defective.
Repair the Main C.B.A.
Perform troubleshooting referring to "How to confirm whether DVD Mechanism Unit or DVD Main C.B.A. is defective."
Troubleshooting Hints of DVD Mechanism Unit
Tray Operation Problem
Check the signal at TP8954 on the DVD Sub C.B.A.
(3.0 Vp-p)
Check the signal at TP8809 (TRYIN) on the DVD Main
C.B.A.
NG
OK
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.
OK
NG
Communication Timing Chart 1
Communication Timing Chart 2
TP8010 on the DVD Main C.B.A.
(DVD_RESET(L))
TP8005 on the DVD Main C.B.A.
(H_RDY (VCR DVD)
1 s
DVD SERIAL START
DVD SERIAL START
21 ms
1 ms
MAX 3.2 ms
16151413121110 9
8 7 6 5 4 3 2 1
TP8009 on the DVD Main C.B.A.
(D_RDY (DVD VCR)
TP8006 on the DVD Main C.B.A.
(DVD_SCK (DVD VCR)
TP8954
(During Loading)
TP8954
(During Unloading)
TP8809
(During Loading)
TP8809
(During Unloading)
OK
1 V
1 V
1 V
10 us
V1 2.3 Vp-p
V1 1.0 Vp-p
1 V
1 V
V1 2.3 Vp-p
V1 1.0 Vp-p
10 s
10 s
10 s
10 s
Summary of Contents for PVDF204 - DVD/VCR/TV COM
Page 11: ...Fig 1 5 11 ...
Page 12: ...Fig 1 6 12 ...
Page 25: ...Fig D2 25 ...
Page 26: ...Fig D3 26 ...
Page 27: ...Fig D4 27 ...
Page 28: ...6 1 1 1 Notes in chart 1 Removal of VCR DVD Ass y Fig D5 28 ...
Page 48: ...7 4 TEST POINTS AND CONTROL LOCATION 48 ...
Page 51: ...11 2 DVD SECTION 51 ...
Page 52: ...11 3 CHASSIS FRAME SECTION 1 Model A B C D E F 52 ...
Page 53: ...11 4 CHASSIS FRAME SECTION 2 53 ...
Page 54: ...11 5 CHASSIS FRAME SECTION 3 54 ...
Page 55: ...11 6 PACKING PARTS AND ACCESORIES SECTION 55 ...
