Sony ICF-DVD57TV Service Manual page 14

ICF-DVD57TV
DVD TEST MODE
Procedure:
1. Turn the power on and press the [DVD] key to select the "DVD".
2. Press the key to open the disc tray.
Z
3. Press the key on the remote commander (RMT-CDVD57A)
as following order.
[TOPMENU] → [ANGLE] → [MENU] → [AUDIO]
4. When the test mode is activated, the monitor will become as
follows.
SR-7596
JITTER VALUE
RF LEVEL
TRACKING ERROR AMP
FOCUS ERROR AMP
TRK SERVO GAIN AUTO ADJ
FCS SERVO GAIN AUTO ADJ
1. DVD OPERATION CHECK
Procedure:
1. Insert the DVD test disc (TDV-540C) (Part No. J-2501-235-
A) to start the automatic adjustment for DVD.
2. Connect the multi meter to TP753 and TP751 on the DVD
board.
3. Check that the reading of multi meter is 40 to 75 mA.
4. Check that the JITTER VALUE of monitor is 2D5 to 000
HEX.
5. Connect the oscilloscope to TP761 and TP702 on the DVD
board.
6. Check that the RF LEVEL of monitor is B8 to 87 HEX.
7. Check that the oscilloscope waveform of RF signal is as shown
in the figure below. (eye pattern)
A good eye pattern means that the diamond shape (◊) in the
center of the waveform can be clearly distinguished.
8. Check that the TRACKING ERROR AMP of monitor is EB
to 8C HEX.
9. Check that the FOCUS ERROR AMP of monitor is FF to BE
HEX.
10. Check that the TRK SERVO GAIN ADJ of monitor is 56 to
38 HEX.
11. Check that the FOCU SERVO GAIN ADJ of monitor is 42 to
18 HEX.
12. Insert the DVD test disc (HLX-N1) (Part No. 8-797-000-10)
and play the title5-chapter2 (full color bar 100%).
13. Connect the oscilloscope to TP706 and TP707 on the DVD
board.
14. Check that the oscilloscope waveform of Y signal is as shown
in the figure below.
14
TEST MODE
– —
– —
– —
– —
– —
– —
550 ± 100 mVp-p
1.0 ± 0.1 Vp-p
15. Connect the oscilloscope to TP708 and TP709 on the DVD
board.
16. Check that the oscilloscope waveform of B-Y signal is as
shown in the figure below.
17. Connect the oscilloscope to TP710 and TP711 on the DVD
board.
18. Check that the oscilloscope waveform of R-Y signal is as
shown in the figure below.
2. CD OPERATION CHECK
Procedure:
1. Insert the CD test disc (PATD-012) (Part No. 4-225-203-01)
to start the automatic adjustment for CD.
2. Connect the multi meter to TP753 and TP752 on the DVD
board.
3. Check that the reading of multi meter is 55 to 85 mA.
4. Check that the JITTER VALUE of monitor is 2BC to 000
HEX.
5. Connect the oscilloscope to TP761 and TP702 on the DVD
board.
6. Check that the RF LEVEL of monitor is A5 to 70 HEX.
7. Check that the oscilloscope waveform of RF signal is as shown
in the figure below. (eye pattern)
A good eye pattern means that the diamond shape (◊) in the
center of the waveform can be clearly distinguished.
8. Check that the TRACKING ERROR AMP of monitor is BA
to 6E HEX.
9. Check that the FOCUS ERROR AMP of monitor is FF to B9
HEX.
10. Check that the TRK SERVO GAIN ADJ of monitor is 4F to
32 HEX.
11. Check that the FOCU SERVO GAIN ADJ of monitor is 52 to
37 HEX.
1.45 ± 0.1 Vp-p
1.45 ± 0.1 Vp-p
700 ± 200 mVp-p