Sony RCD-W7V User manual

RCD-W7V
US Model
COMPACT DISC RECORDER
SERVICE MANUAL
SPECIFICATIONS
Model Name Using Similar Machanism RCD-W1
CD Mechanism Type CDM-700(CD-RW)
Optical Pick-up Type KRS-220C
Model Name Using Similar Mechanism NEW
CD/DVD Mechanism Type DP-4RM
CD-R
CD/DVD
9-873-470-03
2002I0200-1
© 2002.09
Sony Corporation
Home Audio Company
Published by Sony Engineering Corporation
DECK A (the CD/DVD player section)
System CD/DVD player
Laser Semiconductor laser
Signal format system NTSC
Playable discs DVD, CD, CD-R/CD-RW
(for music use), MP3 disc
Frequency response DVD (PCM 96 kHz):
20 Hz to 44 kHz (±1.0 dB)
DVD (PCM 48 kHz):
20 Hz to 22 kHz (±0.5 dB)
CD: 20 Hz to 20 kHz
(±0.5 dB)
Signal-to-noise ratio More than 100dB
(ANALOG OUT connectors only)
Harmonic distortion Less than 0.015%
Dynamic range More than 95 dB (DVD)
More than 95 dB (CD)
Wow and flutter Less than detected value
(±0.001% W PEAK)
Outputs
VIDEO OUT 1.0 Vp-p 75 ohms,
sync negative
S-VIDEO OUT Luminance signal:
1.0 Vp-p, 75 ohms
C: 0.3 Vp-p, 75 ohms
COMPONENT VIDEO OUT Y: 1.0 Vp-p, 75 ohms,
sync negative
(Phono jacks) CB/B-Y, CR/R-Y:
0.7 Vp-p, 75 ohms
DECK B (the CD-R and CD-RW recording section)
System Compact disc digital audio system
Laser Semiconductor laser
Playable discs CD, CD-R, CD-RW (for music use)
Frequency response 20 Hz to 20,000 Hz (±0.5 dB)
Signal-to-noise ratio Over 100 dB during playback
Dynamic range More than 95 dB during playback
Input
ANALOG IN (Phono jacks) Impedance 47 kilohms,
Rated input 330 mVrms
DIGITAL OPTICAL IN Optical wavelength 660 nm
(Square optical connector jack)
Outputs
ANALOG OUT (Phono jacks) Impedance 47 kilohms, Rated input
2 Vrms
Load impedance over 10 kilohms
DIGITAL OPTICAL OUT Wavelength 660 nm
(Square optical connector jack) Output level -18 dBm
PHONES (Phone jacks) 28 mW, 32 ohms
General
Power requirements 120 V AC, 60 Hz
Power consumption 25W (120 V AC)
Dimensions (approx.) 430 x 107.5 x 370 mm (w/h/d) incl.
projecting parts
Mass (approx.) 5.1 kg
Supplied accessories
Design and specifications are subject to change without notice.
• Video cord (1)
• Audio cords (2)
• Remote commander (remote) RM-R70 (1)
• R6 (size AA) batteries (2)
Ver 1.2 2002.09

2
RCD-W7V
SAFETY CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety checks before releasing the set to the customer:
Checkthe antenna terminals, metaltrim,“metallized”knobs, screws,
and all other exposed metal parts forAC leakage. Check leakage as
described below.
LEAKAGE
The AC leakage from any exposed metal part to earth Ground and
from all exposed metal parts to any exposed metal part having a
returnto chassis, mustnot exceed 0.5mA(500 microampers). Leak-
age current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a VOM
or battery-operatedAC voltmeter. The “limit” indication is 0.75
V, so analog meters must have an accurate low-voltage scale.
The Simpson 250 and Sanwa SH-63Trd are examples of a pas-
sive VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2VAC range are suitable. (See Fig. A)
SAFETY-RELATED COMPONENTWARNING !!
COMPONENTS IDENTIFIED BY MARK !OR DOTTED LINE
WITH MARK !ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of soldering iron around 270˚C
during repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pick-
up block. Therefore, when checking the laser diode emission, ob-
serve from more than 30 cm away from the objective lens.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
Fig. A. Using an AC voltmeter to check AC leakage.
0.15µF
To Exposed Metal
Parts on Set
1.5kΩAC
voltmeter
(0.75V)
Earth Ground
CAUTION
The use of opticalinstruments with thisproduct will increase eye
hazard.As the laser beamusedin this Compact DiscRecorder is
harmful to eyes, do notattempt to disassemble the cabinet.
Refer servicing to qualified personnelonly.
Thislabel is locatedon the rear
panel of your recorder.
CAUTION
VISIBLE LASER RADIATION
WHEN OPEN AND
INTERLOCK DEFEATED.
DO NOT STARE INTO BEAM.

3
RCD-W7V
TABLE OF CONTENTS
1. SERVICING NOTE .......................................................... 4
2. GENERAL .......................................................................... 8
3. DISASSEMBLY
3-1. Top Case............................................................................... 9
3-2. Tray Door, Front PanelAssy .............................................. 10
3-3. HP board, FL board, VOL board........................................ 10
3-4. Back Panel ......................................................................... 11
3-5. Audio Board ....................................................................... 11
3-6. Power Board ...................................................................... 12
3-7. DVD Deck Assy (Deck A), CD-R Deck Assy (Deck B) ... 12
3-8. BD Board (Deck A) ........................................................... 13
3-9. Sled Base Assy (Deck A) ................................................... 13
3-10.CD-R Board (Deck B)........................................................ 14
3-11.PU Mechanism Assy (Deck B)........................................... 14
4.TEST MODE...................................................................... 15
5. ELECTRICAL ADJUSTMENT ................................... 16
6. DIAGRAMS
6-1. Circuit Boards Location.................................................... 23
6-2. Block diagrams – Overall Section – ................................. 24
Block diagrams – CD/DVD Section – .............................. 25
Block diagrams – CD-RW Section – ................................ 26
Block diagrams – I/O Section – ........................................ 27
Block diagrams – Power Section – ................................... 28
6-3. Schematic Diagram – BD Section (1/5) –.........................29
6-4. Schematic Diagram – BD Section (2/5) –.........................30
6-5. Schematic Diagram – BD Section (3/5) –.........................31
6-6. Schematic Diagram – BD Section (4/5) –......................... 32
6-7. Schematic Diagram – BD Section (5/5) –.........................33
6-8. Printed Wiring Board – BD Section (Side A) – ................ 34
Printed Wiring Board – BD Section (Side B) – ................ 35
6-9. Schematic Diagram – BD-R Section (1/4) –.................... 36
6-10. Schematic Diagram – BD-R Section (2/4) – .................... 37
6-11. Schematic Diagram – BD-R Section (3/4) – .................... 38
6-12. Schematic Diagram – BD-R Section (4/4) – .................... 39
6-13. Printed Wiring Board – BD-R Section (Side A) – ............ 40
Printed Wiring Board – BD-R Section (Side B) –............. 41
6-14. Printed Wiring Board – Audio Section –...........................42
6-15. Schematic Diagram – Audio Section – ............................ 43
6-16. Printed Wiring Board – Display Section – ........................44
6-17. Schematic Diagram – Display Section –........................... 45
6-18. Schematic Diagram – Power Section – .............................46
6-19. Printed Wiring Board – Power Section – .......................... 47
6-20. IC Pin Functions................................................................ 48
6-21. IC Block Diagrams............................................................ 54
7. EXPLODEDVIEWS
7-1. Front Panel Section ............................................................. 56
7-2. Chassis Section ................................................................... 57
7-3. DVD Play Section (Deck A) (DP-4RM).............................58
7-4. CD Record Section (Deck B) (CDM-700(CD-RW)) .......... 59
8. ELECTRICAL PARTS LIST .................................60
ERROR MESSAGE
The following table explains the error
messages that appear in the display.
CHECK DISC
,A record-related button has been pressed
when a finalized disc is in the DECK B.
,A record-related button has been pressed
when a standard CD is in the DECK B.
,Anunplayable disc (CD-ROM,VideoCD etc.) isinserted.
DATA DISC
,A non-audio CD-ROM or a CD-Video disc has been
placed in the machine.
DISC ERROR
,An unfinalized disc has been placed in the DECK A.
,A DVD disc has been placed in the DECK B .
,The disc is not seated properly.
,There is a problem with the disc.
DISC FULL
,There is not enough time left on the disc to complete a
planned recording.
ERROR
,The disc tray is not seated properly.
NO AUDIO
,A record-related button has been pressed
when a non-audio disc is in the DECK B.
CAN NOT COPY
,A recording is not possible due to the Serial
Copy Management System (SCMS).
UNLOCK
,There is not source for recording through
DIGITAL OPTICAL IN jack.
NO DISC
,No disc is inserted in the recorder.

4
RCD-W7V SECTION 1
SERVICING NOTE
NOTES REGARDING HANDLING OFTHE PICK-UP
1. Notes for transport and storage
1) The pick-up should always be left in its conductive bag until immediately prior to use.
2) The pick-up should never be subjected to external pressure or impact.
2. Repair notes
1) The pick-up incorporates a strong magnet, and so should never be brought close to magnetic materials.
2) The pick-up should always be handled correctly and carefully , taking care to avoid external pressure and impact.
If it is subjected to pressure or impact, the result may be an operational malfunction and/or damage to the
printed-circuit board.
3) Each and every pick-up is already individually adjusted to a high degree of precision, and for that reason the
adjustment point and installation screws should absolutely never be touched.
4) Laser beams may damage the eyes!
Absolutely never permit laser beams to enter the eyes!
Also NEVER switch ON the power to the laser output part (lens, etc.) of the pick-up if it is damaged.
5) Cleaning thelens surface
If there is dust on the lens surface, the dust should be cleaned away by using an air bush (such as used for
camera lens). The lens is held by a delicate spring. When cleaning the lens surface, therefore, a cotton swab
should be used, taking care not to distort this.
6) Never attempt to disassemble the pick-up.
Spring by excess pressure. If the lens is extremely dirty, apply isopropyl alcohol to the cotton swab. (Do not use any
other liquid cleaners, because they will damage the lens.) Take care not to use too much of this alcohol on the swab,
and do not allow the alcohol to get inside the pick-up.
Storage in conductive bag
NEVER look directly at the laser beam, and don’t let contact
fingers or other exposed skin.
Magnet
How to hold the pick-up
Conductive Sheet
Cotton swab
Pressure
Pressure
Drop impact

5
RCD-W7V
NOTES REGARDING COMPACT DISC PLAYER REPAIRS
1. Preparations
1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These compo-
nents are sensitive to, and easily affected by, static electricity. If such static is high voltage, components
can be damaged, and for that reason components should be handled with care.
2) The pick-up is composed of many optical components and other high-precision components. Care must
be taken, therefore, to avoid repair or storage where the temperature of humidity is high, where strong
magnetism is present, or where there is excessive dust.
2. Notes for repair
1) Before replacing a component part, first disconnect the power supply lead wire from the unit
2) All equipment, measuring instruments and tools must be grounded.
3) The workbench should be covered with a conductive sheet and grounded.
When removing the laser pick-up from its conductive bag, do not place the pick-up on the bag. (This is
because there is the possibility of damage by static electricity.)
4) To preventAC leakage, the metal part of the soldering iron should be grounded.
5) Workers should be grounded by an armband (1MΩ)
6) Care should be taken not to permit the laser pick-up to come in contact with clothing, in order to prevent
static electricity changes in the clothing to escape from the armband.
7) The laser beam from the pick-up should NEVER be directly facing the eyes or bare skin.
Resistor
(1MΩ) Conductive
Sheet
Resistor
(1MΩ)
Armband

6
RCD-W7V
Electrostatically Sensitive Devices (ESD)
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components com-
monly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integrated cir-
cuits and some field-effect transistors and semiconductor chip components. The following techniques should
be used to help reduce the incidence of component damage caused by static electricity.
1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off
any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a
commercially available discharging wrist strap device, which should be removed for potential shock reasons
prior to applying power to the unit under test.
2. After removing an electrical assembly equipped with ESD devices, place the assembly on a conductive sur-
face such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ESD devices.
4. Use only an anti-static solder removal device. Some solder removal devices not classified as "anti-static" can
generate electrical charges sufficient to damage ESD devices.
5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ESD devices.
6. Do not remove a replacement ESD device from its protective package until immediately before you are ready
to install it. (Most replacement ESD devices are packaged with leads electrically shorted together by conductive
foam, aluminum foil or comparable conductive materials).
7. Immediately before removing the protective material from the leads of a replacement ESD device, touch the
protective material to the chassis or circuit assembly into which the device will by installed.
CAUTION : BE SURE NO POWER IS APPLIED TOTHE CHASSIS OR CIRCUIT, AND OBSERVE ALL
OTHER SAFETY PRECAUTIONS.
8. Minimize bodily motions when handing unpackaged replacement ESD devices. (Otherwise harmless motion
such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can gen -
erate static electricity sufficient to damage an ESD device).
MAKINGTHE ADJUSMENT DISCS (CDR1/CDR2)
Copy the test programs to a blank CD-R or CD-RW disc.
(This test program is distributed with the service manual)
Note: CD-R or CD-RW must be written by “Easy CD Creator”.

7
RCD-W7V
1. When check the primary part, you must remove the GND pin of
the scope and soldering machine.
Primary GND : C103 – terminal at power board.
2.Whencheck theprimary part,youmust openthe another GND(not
used GND) of scope.
(If another scope GND is connected to secondary GND or other
system, input power line or system have some damage.)
3. When touch the primary part by hand in defected system,
if you use the power line switch, remove the power cord and then
check or touch.
Because in general power switch is switching only one line.
NOTE ON CHECKING POWER SUPPLY CIRCUIT
4. When check the primary part, after remove power cord and dis
charge the primary capacitor, and then check the system.
In the normal state, the voltage of the capacitor is small
(about 10V), but in the abnormal state is very high ( about 140V).
When discharge the capacitor, use the wattage resistor(about 100
ohm).
5. In the narrow system, Until set repaired completely,
insert the power cord at the moment repeatedly and then check
the waveform.
6. In the wide system, when insert the power cord, check the wave
form after about 3 second.
Because the wide system is the soft start method.
BD-R BOARD CHECK AND ADJUSTING JIGS
In case of checking or adjusting the LD power of BD-R board, the PC connection jig (J-2501-210-A) and the test program are required.
This test program is distributed with the service manual.
BD-R board
CD-R
test connector (PN105)
PC
PC connection jig
Set SW501 to “D” side
PS-232C cable (D-sub 9pin
)
(straight type)
PC connection jig
(J-2501-210-A)
SW501
CNP501CN505
W
D
RCD-W7V

8
RCD-W7V SECTION 2
GENERAL
Front Panel
POWER switch (23)
(open/close)-Deck A (23)
(play)-Deck A (23)
AMS / -Deck A (24)
DVD MENU (27)
Disc tray-Deck A (23)
Disc sort indicator
Disc tray-Deck B (23)
AMS / -Deck B (24)
(open/close)-Deck B (23)
(record)-Deck B (48)
REC LEVEL control-Deck B (49)
(pause)-Deck B (24)
(stop)-Deck B (24)
(play)-Deck B (23)
INPUT select (48)
TIME (50)
ERASE (52)
FINALIZE (51)
CD SYNCHRO (NORMAL/HIGH)
(46, 47)
DISPLAY
(remote sensor)
RETURN (22)
Arrow(C/X/x/c)/PUSH ENTER (27)
DISPLAY (31)
TITLE (27)
(stop)-Deck A (24)
(pause)-Deck A (24)
Headphone jack (24)
Headphone level control (24)
2 3 4 5 6 7 8 9 10 11 1
30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12
1
2
3
4
5
6
7
8
9
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qs
qd
qf
qg
qh
qj
qk
ql
w;
wa
ws
wd
wf
wg
wh
wj
wk
wl
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.
This section is extracted from
instruction manual.

9
RCD-W7V
SECTION 3
DISASSEMBLY
3-1.TOP CASE
Note: Disassemble the unit in the order as shown below.
Note: Follow the disassembly procedure in the numerical order given.
Set Back panel
HP board, FL board, VOL board
Tray door, Front panel assy
Audio board
Power board
DVD deck assy (deck A) BD board (deck A) Sled base assy (deck A)
CD-R deck assy (deck B) BD-R board (deck B) PU mechanism assy (deck B)
Top case
2
3
Three screws (case)
1 Two screws (case)
1 Two screws (case)
4 Top case

10
RCD-W7V
3-2.TRAY DOOR, FRONT PANEL ASSY
3-3. HP BOARD, FL BOARD,VOL BOARD
7 Screw (Special)
8 HP board
3 Two screws (Special)
5
4
PWB holder
0 Two screws (Special)
9 Four screws (Special
)
qs FL board and VOL board
1 REC VOL knob
Front panel
6 POWER knob
2 P/VOLUME knob
qa Claws
4
1
Connector (PN101)
White lever
Insert a screwdriver to the square hole on the bottom,
and slide the white lever in the arrow
A direction to
open the tray.
Then remove the tray door.
(In the case of DECK B, remove it in the same manner.)
3 Connector (CN701)
2 Connector (CN702
)
8 Front panel assy
6
7
A
Claws
Tray door (CDR)
(deck B)
Tray door (DVD)
(deck A)
5 Flat cable (PN4013)

11
RCD-W7V
3-4. BACK PANEL
3-5. AUDIO BOARD
1 Four screws (3X10)
2
4
Two screws (3X8 BK
)
5 Back panel
3 Cord power
Wire (flat type) (PN501)
4 Two screws (special)
6 AUDIO board
5 Two screws (special
)
3 Connector (CN103)
2
1
Connector (PN3401)

12
RCD-W7V
3-7. DVD DECK ASSY (DECK A), CD-R DECK ASSY (DECK B)
6 Two screws (special)
2 Two screws (special)
5
DVD deck assy (deck A)
3 Two screws (special)
1 Wire (flat type)(PN3402)
7 Two screws (special)
9
4
8
CD-R deck assy (deck B
)
3-6. POWER BOARD
3
5
Two screws (special)
6 POWER board
2 Two screws (special)
1 Connector (CN4012)
4 PWB holder

13
RCD-W7V
3-8. BD BOARD (DECK A)
3-9. SLED BASE ASSY (DECK A)
1 Screw (1.7X6)
3 Clamp holder assy
7
8
A
5
Two screws (D2.0X6)
9 Sled base assy
4
Push out the disc tray by pushing the
Up/Down guide un the drrow A direction.
6 Disc tray
Up/Down guide
Main base
Bottom view
7 Two screws
(D2.0X6)
2 Two claws
1 Three claws
4
3
Wire (flat type) (PMD03
)
BD board
2 Wire (flat type) (PMD02)
5

14
RCD-W7V
3-11. PU MECHANISM ASSY (DECK B)
A
Up/Down guide
Main base
Bottom view
1 Screw (2X6)
4 Clamp holder assy
8
3
9
6
Two screws (2.0X10)
PU mechanism assy
5 Push out the disc tray by pushing the
Up/Down suide un the drrow
A direction.
7 Disc tray
Two claws 2
0
3-10. CD-R BOARD (DECK B)
3 Wire (fiat type) (PN301)
4 Wire (fiat type) (PN303)
7
6
BD-R board
5 Wire (flat type) (PN304)
2 Connector (PN302)
1 Three claws

15
RCD-W7V
4-1. MICROCOMPUTERVERSION DISPLAY
Setting Procedure
1. Connect a monitor to the “VIDEO OUT” terminal on RCD-W7V.
2. Insert the DVD disc to DVD player side (deck A).
3. Press x(DVD) button to stop the disc rotating.
4. Press DVD DISPLAY button.
5. MENU is displayed on the monitor screen.
6. Select “SET UP” with Mor mbuttons and press ENTER button.
7. Select “TVAspect” in the “SET UP MENU” with Mor mbuttons and press ENTER button.
8. Select “16:9 Wide” in the “TVAspect” with Mor mbuttons. (Don’t press ENTER button.)
9. Press the numerical buttons 1, 3, 9, 7, 1, 3, 9 in the order and press ENTER button.
10. The microcomputer version is displayed on the monitor screen.
MODEL : SONY RCD W7V
REGION : NO. 01
NATION : US 00
RID : LGESY0200001
UCOM. P : VO.1 20020204 01
UCOM. R : VO.1 20020102 01
SERVO : D104
MPEG : OL4O 22MAR01
MISCEL : 11 E0
55 53 00 4C 12 00 FF FF
Microcomputer version display
11. Press Z(DVD) button to quit the test mode.
SECTION 4
TEST MODE

16
RCD-W7V SECTION 5
ELECTRICAL ADJUSTMENT
DVD MD Skew Adjustment
Equipments to be required:
• TV monitor (With RCA pin jack inputs)
• Adjustment disc (CDR1/CDR2) (See page 6)
• Test disc (0.8mm off-centered disc) TDV-534C (J-2501-222-A)
• L-Wrench (3mm) (Impossible to use an inch size)
Adjustment Procedure:
1. Press POWER button and insert CDR1 disc to the DVD player.
2. The display on the set changes automatically.
Wait until the display turns off. (Takes few minutes the display turns off completely.)
(Note: In case of the long time display stopped in progress or displays abnormally, do not anything and wait.)
3. Press POWER button to turn power “OFF”.
4. Press POWER button to turn power “ON” and instantaneously press Zbutton to take out CDR1 disc.
5. Insert the TDV-534C disc and play it.
6. The error rate appears on the screen.
7. Set the position start to play to 200000 sector with M, mor < , ,buttons on the remote commander.
SECTOR : 200123 SECTOR
UPPER BAR | 0000 ERROR RATE
LOWER BAR | 0000
Error rate display
SECTOR : Current position of pick-up
UPPER BAR : Peak to peak level of error rate.
LOWER BAR : Average level of error rate.
Error rate specified value: 30 or less.
8. Adjust the R skew to minimize the error rate.
9. Adjust the T skew to minimize the error rate.
10. Adjust the R skew and T skew mutually several times to minimize the error rate.
11. After adjustment the error rate should be lower than the specified value.
12. Press Zbutton to take out the test disc (TDV-534V).
13. Insert CDR2 disc to the DVD player.
14. The display on the set changes automatically.
Wait until the display turns off. (Takes few minutes the display turns off completely.)
(Note: In case of the long time display stopped in progress or displays abnormally, do not anything and wait.)
15. Press POWER button to turn power “OFF”.
16. Press POWER button to turn power “ON” and instantaneously press Zbutton to take out CDR2 disc.
Adjustment point:
Adjusting hol
e
for R scew
Adjusting hole
for T scew
DVD deck (Deck A)

17
RCD-W7V
Laser Power Adjustment (CD-R Only)
In case of the following parts are replaced, this adjustment is required.
1. CD-R optical pick-up block (KRS-220C)
2. IC208 (EP- ROM)
Specification of Dragon Program Usage Environment
The Dragon Program programmed by API function of Windows 95 can be surely operated on the Windows 95/98 platform.
It isn’t guaranteed on the other platform.
Start up
Procedure:
1. Connect the PC connection jig with the RS-232C cable between the test connector (PN105) on CD-R of RCD-W7V and COM port on
PC.(Check SW501 on the PC connection jig to “D” side.)
2. Turn power on RCD-W7V.
3. Execute Dragon_dv810_svc.exe on Windows.
(Two files Dragon_dv810_svc.exe and Dragon_dv810.cfg are displayed on the setup menu window.)
4. Select “Setup I/F” on “Setup” pull-down menu, then “Select I/F Method” window is open.
5. Select Com Port matching to the Com Port connected the PC connection jig.
6. Select “38400” of “Select Transfer Rate”.
7. Click OK.
Fig 1 : Dragon menu and setup menu windows
Fig 2 : Select I/F method window
LD Power Adjustment
Jigs used on this adjustment
• LD Power Meter
A laser power meter 10mW or more measurable is required. Don’t use the laser power meter for Mini disc because of 10mW max.
Optical power meter (TQ8210): Product of ADVANTEST (on the market).
A thin type optical sensor (Q82017A): Product of ADVANTEST (on the market).
• PC Connection Jig (J-2501-210-A)
• Test Program FD
Dragon program Tool DV810 Ver. 0.9A
(This test program is distributed with the service manual.)
• PC (Windows 95/98)
• RS-232C Cable (on the market) D-SUB 9 pin, straight type
• Test Disc for Operation Check
A low reflecting rate disc for checking playback performance. OK: It can be played back.
• Low reflecting CD-R disc: TCD-R082LMT (J-2502-063-1)
• Low reflecting CD-RW disc: TCD-W082L (J-2502-063 -2)
• CD test disc (YEDS-18) (3-702-101-01)
• DVD test disc (HLX-503) (J-6090 -069 -A) (single layer)
• DVD test disc (HLX-504) (J-6090 -088 -A) (single layer)
• DVD test disc (HLX-505) (J-6090 -089 -A) (dual layer)
• Extension cable (4p, 1.0mm) (J-8000-023-A)
• Extension cable (23p, 1.0mm) (J-501-157-A)

18
RCD-W7V
CD-R LD Setting Check
(VRDC/VWDC/FPD LevelValue Check)
This routine is for checking performances of the record/playback D-A converter (IC409), RFIC (IC413), the encoder/decoder IC
(IC401), CPLD (IC601), the optical pick-up block (KRS-220C), the microcomputer(IC701) and so on.
It diagnoses malfunctions of interface, the pick-up or so on.
It diagnoses the circuit in the recording mode without disc.
Description of each item
OFF LEVEL: In case of the laser turns off, FPDO output is 3V. Sampling value at this time.
VRDC LEVEL: APC circuit VRDC signal sampling value after READ power setting.
VRDC FPD: Optical pick-up FPDO signal sampling value after READ power setting.
VWDC1 LEVEL:APC circuit VWDC signal sampling value after setting WRITE power to regular value.
VWDC1 FPD: Optical pick-up FPDO signal sampling value after setting WRITE power to regular value.
VWDC2-1 FPD: There are two types of characteristics because of a non-linearity period of laser diode in the
over drive portion. This is FPDO sampling value in case of setting one of them to VWDC2 value.
VWDC2-2 FPD: FPDO sampling value in case of setting the other to VWDC2 value.
Specification of each item
38400-3300<OFF_LEVEL<38400+3300 (3.0±0.25V)
10<VRDC_LEVEL<20000
880<VRDC_FPD<1320
2000<VWDC1_LEVEL<25000
8640<VWDC1_FPD<12960
10<VWDC2-1_FPD<9500
2000<VWDC2-2_FPD<16000
Procedure:
1. Eject a disc from CD-R.
2. Select “Laser Inspection” on “LD Inspection” pull-down menu, then “Laser Power Test” window is open.
3. Click Trigger to execute LD check.
4. LD checked results are displayed.
(“OK”/“NG” is displayed for every items.)
5. Click X to close “Laser Power Test” window.
Fig 3 : LD inspection menu windows
Fig 4 : Laser power test window
CD-R LD Power Setting
(VRDC/VWDC1 Resetting)
The optical pick-up and ICs in the circuit have a characteristics individually. In this routine, the parameters related to the
recording/playback power are actually measured and set properly.
The parameters are VRDC, VWDC1, VWDC2, VWDC2 Offset and so on. The reading power and playback power are set
properly by computing the related parameters on the basis of actually measuring values.
The preset parameters are used on power setting in case of performing Read/Write CD-R, CD-RW and so on.
Actual operation: The microcomputer receives serial data, then executes the related performances, and sendparameter values to PC.
PC checks its related parameters and judges OK/NG.

19
RCD-W7V
Procedure:
1. Eject a disc from CD-R.
2. Select “Laser Power Setup” on “LD Inspection” pull-down
menu, then “Laser Power Setup (Manual)” window is open.
3. Click VRDC, then Pick-up moves outward and LD turns on.
4. Measure the LD power with a LD power meter. Write its value
to the blank of “Read Power” column.
(Write a value to two decimal places. Ex: Write “93” in case of
0.93mW.)
5. Click VWDC1, then LD turns on.
6. Measure the LD power with a LD power meter. Write its value
to the blank of “Write Power” column.
(Write a value to two decimal places. Ex: Write “1234” in case
of 12.34mW.)
7. Click LD Off to turn LD off.
8. Click Setup, then setting is over and a result is displayed.
(“OK”/“NG” is displayed for every items.)
9. Click X to close “Laser Power Setup (Manual)” window.
Fig 6 : Laser power setup window
Fig 5 : LD inspection menu windows
Description of each parameter
VRDC: Used on the Read Power setting in case of
reading CD-RW and CD-R. (DAC value on 100mW.)
VWDC: There is VWDC1 (Write power) pin in the optical pick-up block. The recording power is set by it and VWDC2
(Over drive) pin. Used on setting VWDC1 pin power on recording. (Unit: DAC value/10mW)
VWDC2: Used on setting VWDC2 (Over drive) pin power on recording. (Unit: DAC value/5mW)
VWDC2 Offset: Used on setting VWDC2 (Over drive) pin power with VWDC2 parameter on recording. (Unit: DAC value)
Specification of each parameter
20<read power<200
100<write power<2000
30<VRDC<150
48<VWDC1<150
50<VWDC2<126
VWDC2 Offset<35
Fig 8 : Read calibration results window
Fig 7 : Calibration menu windows
Adjustment Data Check
Check if the error has occurred on reading “CD-R LD POWER SETTING” value.
Procedure:
1. Select “Calibration” on “Calibration” pull-down menu, then “Read Calibration Results” window is open.
2. Click Read, then the calibration data are displayed.
3. Data specification
CD-R VRDC DAC: 30-150
VWDC1: 48-150
VWDC2: 50-126
VWDC2 Offset: 0-35
4. Click X to close “Read Calibration Results” window.

20
RCD-W7V
level=1.3 ± 0.6Vp-p symmetry
A (DC voltage
)
center of
waveform
B
0V
1 track jump waveform
Specified level: –– ×100=less than ±22%
B
A
DVD SECTION
Note :
1. DVD Block is basically designed to operate without adjustment.
Therefore, check each item in order given.
2. Use HLX-503 disc unless otherwise indicated.
3. Use an oscilloscope with more than 10MΩimpedance.
4. Clean the object lens by an applicator with neutral detergent
when the signal level is low than specified value with the fol-
lowing checks.
RF Level Check
Procedure :
1. Connect oscilloscope to IC4B1 1pin and IC4B2 1pin.
2. Turned Power switch on.
3. Load a disc (HLX-503) and playback.
4. Confirm that oscilloscope waveform is clear and check RF sig-
nal level is correct or not.
IC4B1 1pin
IC4B2 1pin
BD board oscilloscope
SERVO Check
Note : Clear RF signal waveform means that the shape “ ◊” can be clearly
distinguished at the center of the waveform.
RF signal waveform VOLT/DIV : 200mV
TIME/DIV : 500ns
3T= 0.55
± 0.07Vp-p
11T= 0.90
± 0.13Vp-p
3T 11T
TP4B3 (IC4B1 ra pin)
IC4B2
1 pin
BD board oscilloscop
e
Adjustment Location:
[BD BOARD] (SIDE B)
Procedure :
1. Connect oscilloscope to TP4B3 (IC4B2 1pin) and IC4B2 1
pin.
2. Turned Power switch on.
3. Load a disc (HLX-503) and playback the number one track.
4. Press the Xbutton. (Becomes the 1 track jump mode.)
5. Confirm that the level B and A (DC voltage) on the oscillo-
scope waveform.
E-F Balance (1Track jump) Check
116
48
8
5
1
4
33
17
64
49 32
IC4B1
IC4B2
VC (IC4B2 1pin)
TP4B2 (FE)
TP4B3 (TE)
R4B4
TP (IC4B1 1pin)(RF)