Read Sony HCD-DP900D / MHC-DP900D Service Manual online
20
HCD-DP900D
DVD SECTION
Note :
1. DVD Block is basically designed to operate without adjustment.
Therefore, check each item in order given.
2. Use HLX-504 (J-6090-088-A) or HLX-505 (J-6090-089-A)
unless otherwise indicated.
3. Use an oscilloscope with more than 10M
Ω impedance.
4. Clean the object lens by an applicator with neutral detergent
when the signal level is low than specified value with the
following checks.
following checks.
Video Level Adjustment (MB BOARD)
Purpose
This adjustment is made to satisfy the NTSC standard, and if not
adjusted correctly, the brightness will be too large or small.
Purpose
This adjustment is made to satisfy the NTSC standard, and if not
adjusted correctly, the brightness will be too large or small.
Procedure:
1. Connect oscilloscope to VIDEO output.
2. Load a disc (HLX-504 or HL-505) playback.
3. Adjust the RV501 to attain 1.0
1. Connect oscilloscope to VIDEO output.
2. Load a disc (HLX-504 or HL-505) playback.
3. Adjust the RV501 to attain 1.0
±0.1Vp-p.
J601
VIDEO OUTPUT
VIDEO OUTPUT
75
Ω
Oscilloscope
set
1.0
± 0.1 Vp-p
(WHITE 75%)
S-terminal Output Check
Purpose
Check S-video output.
Purpose
Check S-video output.
J602
S-VIDEO OUTPUT
S-VIDEO OUTPUT
75
Ω
Oscilloscope
G
G
set
Procedure:
1. Connect oscilloscope to S-VIDEO out. (S-Y teminal)
2. Load a disc (HLX-504 or HL-505) playback.
1. Connect oscilloscope to S-VIDEO out. (S-Y teminal)
2. Load a disc (HLX-504 or HL-505) playback.
3. Confirm that the S-Y level is 1.0
± 0.1Vp-p.
1.0
± 0.1 Vp-p
4. Connect oscilloscope to S-VIDEO output. (S-C teminal)
5. Connect that the S-C burst is 286
5. Connect that the S-C burst is 286
± 50mVp-p.
286
± 80 mVp-p
Adjustment Location
CN011
MB BOARD (SIDE A)
IC503
IC103
CN103
CN008
CN404
RV501
VIDEO LEVEL
Adjustment
Ver 1.5
RE-ADJUSTMENT OF THE SERVO CIRCUIT
The re-adjustment of the servo circuit is necessary
when the part which relates to the servo circuit is
replaced.
Referring to ”4-9. DRIVE AUTO ADJUSTMENT”
(SUPPLEMENT-1 see page 6), Choose ALL and do
the re-adjustment of each item of DVD-SL, CD and
DVD-DL.
The re-adjustment of the servo circuit is necessary
when the part which relates to the servo circuit is
replaced.
Referring to ”4-9. DRIVE AUTO ADJUSTMENT”
(SUPPLEMENT-1 see page 6), Choose ALL and do
the re-adjustment of each item of DVD-SL, CD and
DVD-DL.
THE PART THAT THE RE-ADJUSTMENT OF THE
SERVO CIRCUIT IS NECESSARY
11. Optical pick-up
12. RF AMP (IC001)
13. DSP IC (IC302)
14. Motor driver IC (IC401)
15. EEPROM (IC303)
SERVO CIRCUIT IS NECESSARY
11. Optical pick-up
12. RF AMP (IC001)
13. DSP IC (IC302)
14. Motor driver IC (IC401)
15. EEPROM (IC303)
Click on the first or last page to see other HCD-DP900D / MHC-DP900D service manuals if exist.