Electrical Adjustments - Sony DVP-CX995V Service Manual

Instruments required:
1) Color monitor TV
2) Oscilloscope 1 or 2 phenomena, band width over 100 MHz,
with delay mode
3) Frequency counter (over 8 digits)
4) Digital voltmeter
5) Remote commander (RM-ASP001)
6) CD reference disc
LUV-P01 (4-999-032-01)
YEDS-18 (3-702-101-01)
PATD-012 (4-225-203-01)
7) DVD reference disc
TDV-520CS0 (J-2501-236-A) (single layer) (NTSC)
HLX-503 (J-6090-069-A) (single layer) (NTSC)
HLX-504 (J-6090-088-A) (single layer) (NTSC)
TDV-540C (J-2501-235-A) (dual layer) (NTSC, Opposite)
HLX-501 (J-6090-071-A) (dual layer) (NTSC)
HLX-505 (J-6090-089-A) (dual layer) (NTSC)
8) SA-CD reference disc
HLXA-509 (J-6090-090-A)
9) Extension Cable (J-2501-199-A)
6-1. OPTICAL TRAVERSE UNIT CHECK
In the case of quality judgement when the defect of the optical
traverse unit like the skip etc. is thought, and in case of operation
confirming when replacing optical traverse unit, select "ALL" of
"1. DRIVE AUTO ADJUSTMENT" in the test mode (refer to page
23, 25), adjust DVD-SL (single layer), CD and DVD-DL (dual layer),
and confirm whether the result of each setting value is the range of
the following specification.
DVD-SL
An.Off.A 20 to E0
An.Off.B 20 to E0
An.Off.C 20 to E0
An.Off.D 20 to E0
An.Off.E –
An.Off.F –
An.G.Main 0E to 1C
An.G.Side –
RF level 70 to F0
FE S L0 74 to FF
FE S L1 –
VTS2 00 to 10
TE levDVD 28 to 48
TE levCD –
D0 to FF
TE Offset
00 to 30
FCS Gain 20 to 3F
TRK Gain 30 to 50
FCS Bal.1 –
FCS Bal.2 36 to 4F
REFQ1 –
REFQ2 0C to 30
Jitter 07 to 14
SECTION 6

ELECTRICAL ADJUSTMENTS

DVD-DL
CD
L0 L1
20 to E0 20 to E0 –
20 to E0 20 to E0 –
20 to E0 20 to E0 –
20 to E0 20 to E0 –
20 to E0 – –
20 to E0 – –
0E to 1A 1D to 28 1D to 28
0C to 1C – –
70 to F0 60 to F0 60 to F0
74 to FF 54 to FF –
– – 54 to FF
– – –
– 28 to 48 28 to 48
34 to 60 – –
20 to E0 20 to E0
A0 to CC
00 to 30 00 to 30
18 to 38 20 to 48 20 to 48
30 to 50 30 to 50 30 to 50
– – –
36 to 4F 36 to 4F 36 to 4F
– – –
14 to 24 0C to 30 0C to 30
07 to 0F 07 to 14 –
6-2. POWER SUPPLY CHECK
Mode: E-E
Instrument: Digital voltmeter
EVER +3.3 V Check
Check point JL381 on the AV board
3.3 ± 0.2 V
Specification
SW +4.5 V Check
Check point JL378 on the AV board
4.5 ± 0.2 V
Specification
SW +5 V Check
Check point JL382 on the AV board
5.0 ± 0.3 V
Specification
SW +12 V Check
Check point JL376 on the AV board
12.0 ± 1.0 V
Specification
EVER +12 V Check
Check point JL383 on the AV board
12.0 ± 1.0 V
Specification
SW –12 V Check
Check point JL373 on the AV board
–12.0 ± 1.0 V
Specification
EVER –12 V Check
Check point JL372 on the AV board
–12.0 ± 1.0 V
Specification
Checking method:
1) Confirm that each voltage satisfies the specification.
6-3. ADJUSTMENT OF VIDEO SYSTEM
6-3-1. Video Level Adjustment
<Purpose>
This adjustment is made to satisfy the NTSC standard, and if not
adjusted correctly, the brightness will be too large or small.
Mode Video level adjustment in test mode
Signal Color bars
Check point VIDEO LINE OUT connector (J103)
(75 Ω terminated)
Instrument Oscilloscope
Adjusting element RV501
Specification 1.0
Adjusting method:
1) In the Test Mode Menu, select the "6. Video Level Adjustment"
so that color bars are generated.
2) Adjust the RV501 to attain 1.0
Fig. 6-1
DVP-CX995V
+ 0 . 0 4
Vp-p
– 0 . 0 2
+ 0 . 0 4
Vp-p.
– 0 . 0 2
+0.04
1.0 Vp-p
–0.02
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