Sharp CD-SW250DVD User manual

CD-SW250DVD
– 0 –
SERVICE MANUAL
SHARP CORPORATION
CONTENTS
Parts marked with " " are important for maintaining the safety of the set. Be sure to replace these parts with specified ones for
maintaining the safety and performance of the set.
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
CHAPTER 1. GENERAL DESCRIPTION
[1] Specifications ................................................. 1-1
[2] Names of parts............................................... 1-2
CHAPTER 2. ADJUSTMENTS
[1] Mechanism section ........................................ 2-1
[2] Tuner section ................................................. 2-1
[3] Standard Specification of Stereo System
Error Message Display Contents ................... 2-2
[4] DVD/CD Section ............................................ 2-2
[5] TEST Mode.................................................... 2-3
[6] CD Changer mechanism section ................... 2-8
CHAPTER 3. MECHANISM BLOCKS
[1] Caution on diassembly................................... 3-1
[2] Removing and reinstalling the main parts........ 3-4
CHAPTER 4. DIAGRAMS
[1] Block diagrams............................................... 4-1
CHAPTER 5. CIRCUIT DESCRIPTION
[1] Notes on schematic diagram .........................5-1
[2] Types of transistor and LED ..........................5-1
[3] Waveforms of CD circuit ................................5-2
[4] Voltage...........................................................5-3
CHAPTER 6. CIRCUIT SCHEMATICS AND PARTS
LAYOUT
[1] Schematic diagram........................................6-1
[2] Wiring side of PWB......................................6-13
CHAPTER 7. FLOWCHART
[1] Troubleshooting.............................................7-1
CHAPTER 8. OTHERS
[1] Function table of IC .......................................8-1
[2] FL Display....................................................8-14
Parts Guide
In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.
CD-S W 250DVD
NTS C /PAL
No. S6547CDW250DV
CD-SW250DVD
MODEL
CD-SW250DVD DVD Mini System consisting of CD-SW250DVD (main
unit) CP-S250 (front speaker), GBOXSA110AWM1 (surround speak-
er) and CP-SW250 (subwoofer).
DVD MINI SYSTEM

CD-SW250DVD
– i –
SAFETY PRECAUTION FOR SERVICE MANUAL
WARNINGS
THE AEL (ACCESSIBLE EMISSION LEVEL) OF THE LASER POWER OUTPUT IS LESS THAN CLASS 1 BUT THE LASER
COMPONENT IS CAPABLE OF EMITTING RADIATION EXCEEDING THE LIMIT FOR CLASS 1. THEREFORE IT IS
IMPORTANT THAT THE FOLLOWING PRECAUTIONS ARE OBSERVED DURING SERVICING TO PROTECT YOUR EYES
AGAINST EXPOSURE TO THE LASER BEAM.
1-WHEN THE CABINET IS REMOVED, THE POWER IS TURNED ON WITHOUT A COMPACT DISC IN POSITION AND THE
PICKUP IS ON THE OUTER EDGE THE LASER WILL LIGHT FOR SEVERAL SECONDS TO DETECT A DISC. DO NOT
LOOK INTO THE PICKUP LENS.
2-THE LASER POWER OUTPUT OF THE PICKUP UNIT AND REPLACEMENT SERVICE PARTS ARE ALL FACTORY
PRESET BEFORE SHIPMENT.
DO NOT ATTEMPT TO READJUST THE LASER PICKUP UNIT DURING REPLACEMENT OR SERVICING.
3-UNDER NO CIRCUMSTANCES STARE INTO THE PICKUP LENS AT ANY TIME.
4-CAUTION-USE OF CONTROLS OR ADJUSTMENTS, OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE
SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.
Laser Diode Properties
Material: AIGaAs/InGaAIP
Wavelength: 790 nm/650 nm
Emission Duration: continuous
Laser Output: max. 0.69 mW
CAUTION: VISIBLE AND INVISIBLE LASER RADIATION WHEN
OPEN. DO NOT STAR E INTO BEAM OR VIEW DIRECTLY WITH
OPTICAL INS TR UMENTS.
WARNUNG: SICHTBARE UND UNSICHTBARE LASERSTRAHLUNG
WENN GER T
GE…FFNET. NICHT IN DIE STRAHLUNG SCHAUEN
ODER DIREKT MIT OPTISCHEN HILFS MITTELN BETRACHTEN.
ATTENTION: RAYONS LASER VISIBLE ET INVISIBLE EN CAS
D' OUVERTURE. NE PAS R EGARDER LE FAISCEAU DIRECTEMENT
OU AV E C DE S I N S T R UM EN TS OP T I QUE S .
AC POWER SUPPLY CORD AND AC PLUG ADAPTOR
VOLTAGE SELECTION
Before operating the unit on mains, check the preset voltage. If the voltage is different from your local voltage, adjust the voltage
as follows.
Turn the selector with a screwdriver until the appropriate voltage number appears in the window (110 V, 127 V, 220 V or 230 V - 240 V AC).
QACCE0015AW00 QPLGA0004AWZZ

CD-SW250DVD
– ii –
1. Employing lead-free solder
" Main/Display/Tumer/Power/Game Input/DVD Servo/LED/Mic/S-Video Out/ Surround/Control " of this model employs lead-free solder.
The LF
symbol indicates lead-free solder, and is attached on the PWB andservice manuals. The alphabetical character following
LF
shows the type of lead-free solder.
Example:
Indicates lead-free solder of tin, silver and copper.
2. Using lead-free wire solder
When fixing the PWB soldered with the lead-free solder, apply lead-free wire solder. Repairing with conventional lead wire solder
may cause damage or accident due to cracks.
As the melting point of lead-free solder (Sn-Ag-Cu) is higher than the lead wire solder by 40 C, we recommend you to use a
dedicated soldering bit, if you are not familiar with how to obtain lead-free wire solder or soldering bit, contact our service station
or service branch in your area.
3. Soldering
As the melting point of lead-free solder (Sn-Ag-Cu) is about 220 C which is higher than the conventional lead solder by 40 C,
and as it has poor solder wettability, you may be apt to keep the soldering bit in contact with the PWB for extended period of
time. However, Since the land may be peeled off or the maximum heat-resistance temperature of parts may be exceeded,
remove the bit from the PWB as soon as you confirm the steady soldering condition.
Lead-free solder contains more tin, and the end of the soldering bit may be easily corrected. Make sure to turn on and off the
power of the bit as required.
If a different type of solder stays on the tip of the soldering bit, it is alloyed with lead-free solder. Clean the bit after every use
of it.
When the tip of the soldering bit is blackened during use, file it with steel wool or fine sandpaper.
Be careful when replacing parts with polarity indication on the PWB silk.
Lead-free wire solder for servicing
Ref No. DescriptionParts No.
PWB-A 92LPWB6394MANS Main/Display
PWB-B 92LPWB6385PWRS Power/Game Input
PWB-C 92LPWB6394DVDS DVD Servo (For Philippines)
PWB-C 92LPWB6395DVDS DVD Servo (Except for Philippines)
PWB-D 92LPWB6385TUNS Tuner
PWB-E 92LPWB6230LEDS LED
PWB-F 92LPWB6385MICS Mic
PWB-G 92LPWB6385DVSS S-Video Out
PWB-J 92LPWB6394SPKS Surround
PWB-K 92LPWB6297CTRS Control

CD-SW250DVD
1 – 1
AudioCD-SW250DVDService ManualCD-SW250DVDMarketE
CHAPTER 1. GENERAL DESCRIPTION
[1] Specifications
Main Unit
General
Power source AC 110/127/220/230-240 V, 50/60 Hz
Power consumption 215 W
Dimensions Width: 260 mm (10-1/4")
Height: 330 mm (13")
Depth: 326 mm (12-7/8")
Weight 10.5 kg (23.15 lbs.)
Amplifier
Output power Front speakers:
MPO: 260 W (130 W + 130 W) (10 % T.H.D.)
RMS: 130 W (65 W + 65 W) (10 % T.H.D.)
RMS: 90 W (45W+45W)(0.9 % T.H.D.)
Surround speakers:
MPO: 130 W (65W+65W)(10%T.H.D.)
RMS: 70 W (35 W + 35 W) (10 % T.H.D.)
RMS: 50 W (25W+25W)(0.9 % T.H.D.)
Subwoofer:
MPO: 385 W (10 % T.H.D.)
RMS: 200 W (10 % T.H.D.)
RMS: 130 W (0.9 % T.H.D.)
Output terminals Front speakers: 8 ohms
Surround speakers: 16 ohms
Subwoofer: 12 ohms
Headphones: 16 - 50 ohms (recommended:
32 ohms)
Audio digital out: optical
Input terminals Game/auxiliary (Audio Input): 500 mV/47 k ohms
Microphone 1/2: 1 mV/600 ohms
Game/Video: 1 Vp-p/75 ohms
DVD/VCD/CD player
Signal system NTSC/PAL
Supported disc types DVD (Region number 3, ALL), audio CD, CD-R,
CD-RW, VCD, MP3, WMA
Video output Output socket: Pin socket x 1
S-Video output Output socket: S-Video connector x 1
Component video Output socket: Pin socket x 3
output
Video signal Horizontal resolution: 500 lines
S/N ratio: 60 dB
Audio signals Frequency characteristics:
Linear PCM DVD:
4 Hz to 22 kHz (48 kHz sampling)/
4 Hz to 44 kHz (96 kHz sampling)
CD:4Hzto20kHz
S/N ratio: 96 dB 1 kHz (CD)
Dynamic range: 96 dB (Linear PCM DVD)
96 dB (CD)
Total harmonic distortion ratio:
0.006 % maximum
Tuner
Frequency range FM: 88 - 108 MHz
AM: 531 - 1,602 kHz
Cassette deck
Frequency response 50 - 14,000 Hz (normal tape)
Signal/noise ratio 50 dB (recording/playback)
Wow and flutter 0.3 % (WRMS)
Type 3-way type speaker system
Super tweeter
5 cm (2") tweeter
13 cm (5-1/8") woofer
Maximum input power 130 W
Rated input power 65 W
Impedance 8 ohms
Dimensions Width: 180 mm (7-1/16")
Height: 330 mm (13")
Depth: 212 mm (8-6/16")
Weight 3.0 kg (6.6 lbs.)/each
Type 8 cm (3-1/8") full-range speaker
Maximum input power 70 W
Rate input power 35 W
Impedance 16 ohms
Dimensions Width: 160 mm (6-5/16")
Height: 110 mm (4-3/8")
Depth: 149 mm (5-7/8")
Weight 0.65 kg (1.4 lbs.)/each
Type Full Range
20 cm (8") subwoofer
Maximum input power 400 W
Rate input power 200 W
Impedance 12 ohms
Dimensions Width: 250 mm (9-13/16")
Height: 330 mm (13")
Depth: 294 mm (11-9/16")
Weight 5.9 kg (13 lbs.)
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.
Specifications for this model are subject to change without
prior notice.
CD-SW250DVD
CP-S250
CP-SW250
GBOXSA110AWM1

CD-SW250DVD
1 – 2
[2] Names of parts
Front panel
1. Disc Trays
2. Timer Set Indicator
3. On/Stand-by Button
4. DVD Chapter Skip/DVD/Video CD/CD/MP3/WMA Track Up or
Fast Forward, Tape 2 Fast Forward, Tuner Preset Up,
Time Up Button
5. Tape 2 Reverse Mode Select Button
6. Clock/Timer Button
7. Tuning Up Button
8. Tuning Down Button
9. DVD Chapter Skip/DVD/Video CD/CD/MP3/WMA Track Down or Fast
Reverse, Tape 2 Rewind, Tuner Preset Down,
Time Down Button
10. Equalizer Mode Select Button
11. Tape 1 Cassette Compartment
12. Headphone Socket
13. Game/Video Input Socket
14. Disc Number Select Buttons
15. Disc Direct Play Button
16. Disc Tray Open/Close Button
17. DVD/Video CD/CD/MP3/WMA Play, Tape 1 Play,
Tape 2 Forward Play Button
18. Memory/Set Button
19. Tape 2 Record Pause Button
20. Tape 2 Reverse Play Button
21. DVD/Video CD/CD/MP3/WMA or Tape Stop Button
22. Extra Bass (Surround)/Demo Mode Button
23. Volume Control
24. Tape 2 Cassette Compartment
25. Microphone Socket 1
26. Microphone Socket 2
27. Microphone Level Control
28. Tuner (Band) Button
29. DVD/CD Button
30. Tape (1 2) Button
31. Game/Video Button
AUTO REVERSE
MIC MIC LEVEL
MIN MAX
DVD MINI SYSTEM
1 2
CD-SW250DVD
DVD MINI SYSTEM
CD-SW250DVD
14
2
3
4
6
1
5
11
13
9
7
8
10
12
15
16
24
26
18
19
17
20
21
22
27
23
25
28 31
29 30
X-BASS
(SURROUND)
/DEMO
X-BASS
(SURROUND)
/DEMO
CD-SW250DVD
Display
1. Disc Number Indicators
2. DVD/Video CD/CD/MP3/WMA Play Indicator
3. DVD/Video CD/CD/MP3/WMA Pause Indicator
4. DVD/Video CD/CD/MP3/WMA Repeat Indicator
5. DVD Indicator
6. VCD Indicator
7. CD Indicator
8. MP3 Indicator
9. Extra Bass Indicator
10. Memory Indicator
11. DVD Angle Indicator
12. DVD Chapter Indicator
13. DVD Title Indicator
14. WMA Indicator
15. Virtual Surround Indicator
16. Tape Record Indicator
17. Timer Recording Indicator
18. Timer Play Indicator
19. Sleep Indicator
20. Tape 2 Reverse Play Indicator
21. Tape Forward Play Indicator
22. Tape 2 Reverse Mode Indicator
23. FM Stereo Mode Indicator
24. FM Stereo Receiving Indicator
25. Daily Timer Indicator
26. Tuner Receiving Frequency Indicators
27. Karaoke Mode Indicator

CD-SW250DVD
1 – 3
Rear panel
1. Component Video Out Sockets
2. S-Video Output Socket
3. Audio Digital Output Socket
4. FM 75 Ohms Aerial Terminal
5. FM Aerial Earth Terminal
6. AM Loop Aerial Socket
7. Subwoofer Light Up Socket
8. Span Selector Switch
9. Video Output Socket
10. Subwoofer Terminals
11. Front Speakers Terminals
12. Surround Speakers Terminals
13. AC Power Lead
14. Cooling Fan
15. AC Voltage Selector
Note:
This product is equipped with a cooling fan inside, which begins to run once the
power is on for better heat radiation.
12
7
8
10
9
11
4
5
6
3
15
13
14
2
1
CD-SW250DVD
Buttons with " " mark in the illustration can be operated on the remote
control only.
Remote control
1. Remote Control Transmitter
2. Disc Number Select Buttons
3. DVD Top Menu Button
4. Clock/Timer Button
5. Direct Search Button
6. Clear/Display Button
7. Enter Button
8. Cursor Left Button
9. Memory/Dimmer Button
10. Cursor Down Button
11. Tape Record Pause Button
12. DVD Chapter Skip/DVD/Video CD/MP3/ WMA Fast Reverse/Video CD/
CD/MP3/WMA track up/Tape Fast Wind and Tuner Preset Down,
Time Down Button
13. DVD/Video CD/CD/MP3/WMA Pause Button
14. DVD Chapter Skip/DVD/Video CD/MP3/WMA Fast Forward/Video CD/
CD/MP3/WMA track up/Tape Fast Wind and Tuner Preset Up,
Time Up Button
15. Tape Reverse Play Button
16. DVD/Video CD/CD/MP3/WMA/Tape Stop Button
17. DVD/Video CD/CD/MP3/WMA/Tape Play Button
18. Shift Button
19. Volume Up or Down Button
20. On/Stand-by Button
21. Echo Level Up/Down Button
22. DVD Direct Button
23. DVD Menu Button
24. Return Button
25. CD Random Button
26. Cursor Up Button
27. Cursor Right Button
28. DVD/Video CD Slow Button
29. DVD/Video CD/CD/MP3/WMA Repeat Button
30. DVD Subtitle Button
31. DVD Angle Button
32. DVD Zoom Button
33. DVD/Video CD/CD/MP3/WMA Button
34. Tuner (Band) Button
35. Tape (1 2) Button
36. Game/Video Button
37. Equaliser Mode Select Button
38. Extra Bass Button
39. DVD 3-D Virtual Surround Button
40. DVD On Screen Button
1
2
20
21
22
23
24
25
26
27
28
3
4
5
6
7
8
9
10
18
19
11
15
33 34 35 36
37 38 39 40
29 30 31 32
16 17
12 13 14
GAME
/VIDEO

CD-SW250DVD
1 – 4
CD-SW250DVD
CP-S250
CP-SW250
GBOXSA110AWM1
1. Tweeter
2. Super Tweeter
3. Woofer
4. Bass Reflex Duct
5. Speaker Wire
1. Full-Range Speaker
2. Speaker Wire
1. Subwoofer
2. Bass Reflex Duct
3. Subwoofer Light-Up Wire
4. Speaker Wire
1
24
3
5
1
2
11
2
4
3
Remote control with shift button
1. Karaoke/Audio Mode Button
2. DVD Setup Button
3. DVD Sound Button
4. DVD Picture Button
5. DVD/Video CD/CD A-B Repeat Button
6. DVD Gamma Button
1
2
3
4
5
6

CD-SW250DVD
2 – 1
AudioCD-SW250DVDService ManualCD-SW250DVDMarketE
CHAPTER 2. ADJUSTMENTS
[1] Mechanism section
• Driving Force Check
• Torque Check
• Tape Speed
[2] Tuner section
fL: Low-range frequency
fH: High-range frequency
• AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
•FMRF
Signal generator: 1 kHz, 40 kHz dev., FM modulated
•FMIF
Signal generator: 10.7 MHz, FM modulated
Torque Meter Specified Value
Play: TW-2111 Tape 1: Over 80 g
Tape 2: Over 80 g
Torque Meter Specified Value
Tape 1 Tape 2
Play: TW-2111 30 to 80 g.cm 30 to 80 g.cm
Fast forward: TW-2231 — 70 to 180 g.cm
— 70 to 180 g.cm
Test Tape Adjust-
ing Point
Specified
Value
Instrument
Connection
Normal
speed
MTT-111 Variable
Resistor in
motor.
3,000 ±30 Hz
Speaker
Speaker Ter-
minal (Load
resistance: 6
ohms)
Figure 1
Test Stage Frequency Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
AM IF 450 kHz 1,620 kHz T351 *1
AM Band
Coverage
— 522 kHz (fL): T306
1.1 ±0.1 V
*2
AM
Tracking
990 kHz 990 kHz (fL): T303 *1
*1. Input: Antenna Output: TP302
*2. Input: Antenna Output: TP301
TAPE MECHANISM
Tape
Motor
Variable Resistor in motor
Test
Stage
Frequency Frequency
Display
Setting/
Adjusting
Point
Instrument
Connection
FM Band
Coverage
— 87.50 MHz T301 (fL):
1.3 V ±0.1 V
*1
FM RF 98.00 MHz
(10-30 dB)
98.00 MHz L312 *2
*1. Input: Antenna Output: TP301
*2. Input: Antenna Output: Speaker terminal
Test
Stage
Frequency Frequency
Display
Setting/Adjust-
ing Point
Instrument
Connection
IF 10.7 MHz 98 MHz T302 (Turn the
core of trans-
former T302
fully counter
clockwise)
*1
*1. Input: Antenna Output: TP301
Figure 2 Adjustment Points
TUNER PWB
T301
FM OSC
T351
T303
T306
T302
IC301
S0301A
FM ANTENNA
TERMINAL
AM LOOP
ANTENNA
CNP302
AM OSC
AM IF
FM IF
FM RF
AM ANTENNA
R357
R380
FM BAND
COVERAGE fL
AM BAND
COVERAGE fL
L312
IC302
TUNER PWB
T301
FM OSC
T351
T303
T306
T302
IC301
S0301A
FM ANTENNA
TERMINAL
AM LOOP
ANTENNA
CNP302
AM OSC
AM IF
FM IF
FM RF
AM ANTENNA
R357
R380
FM BAND
COVERAGE fL
AM BAND
COVERAGE fL
L312
IC302

CD-SW250DVD
2 – 2
[3] Standard Specification of Stereo System Error Message Display Contents
(*) CHECKING:
If CD changer mechanism error is detected, ‘CHECKING’ will be dis-
play instead of ‘ER-CD**’. ‘ER-CD**’ display will only be display when
error had been detected for the 5 th times.
Speaker abnormal detection and +B PROTECTION display
In case speaker abnormal detection or +B PROTECTION had
occurred, the unit will automatically enter to stand-by mode and Timer
indicator will Flashing as below.
+B PROTECTION is condition when irregular process occur on power
supply line.
Example: In case of speaker abnormal.
BEFORE TRANSPORTING THE UNIT
The following process need to be taken after set tapering/parts
replacement.
1. Press the ON/STAND-BY button to enter stand-by mode.
2. While pressing down the button and the X-BASS/DEMO but-
ton, press the ON/STAND-BY button. The Micro Computer version
number will be displayed as “BD******”.
3. Press OPEN/CLOSE button until “WAIT”→“FINISHED” appears.
4. Unplug the AC cord and the unit is ready for transporting.
[4] DVD/CD Section
1. DVD SECTION
•Adjustment
Since this DVD system incorporates the following automatic adjust-
ment functions, readjustment is not needed when replacing the
pickup. Therefore, different PWBs and pickups can be combined
freely.
Each time a disc is changed, these adjustments are performed
automatically. Therefore, playback of each disc can be performed
under optimum conditions.
Items adjusted automatically
1) Offset adjustment (The offset voltage between the head amplifier
output and the VREF reference voltage is compensated inside the
IC.)
* Focus offset adjustment
* Tracking offset adjustment
2) Tracking balance adjustment
3) Gain adjustment (The gain is compensated inside the IC so that the
loop gain at the gain crossover frequency will be 0 dB.)
* Focus gain adjustment
* Tracking gain adjustment
DVD/CD Error code description
* 'CHECKING'
If Error is detected, 'CHECKING' will be displayed instead of 'ER-
CD**'. 'ER-CD**' display will only be displayed when error had been
detected for the 5th times.
Error Contents Display Notes
CD Pickup Mechanism Error. 'ER-CD01' PU-IN SW Detection NG.
CD Changer Mechanism Error. 'ER-CD**' (*) 10: CAM SW Detection NG during normal operation
11: CAM SW Detection NG during initialize process
20:TRAY SW Detection NG during normal operation
21:TRAY SW Detection NG during initialize process
DVD Communication Error. 'ER-CD30' DVD COMMUNICATION ERROR.
Focus Not Match/IL Time Over. 'NO DISC'
TUNER PLL Unlock. PLL Unlock.
FM 87.5 MHz
TIMER
LED OFF OFF OFF OFF OFF
1 FRAME (REPEAT)
ONFLASHING
NO. 2
NO. 1
ON ON
NO. 1 : +B PROTECTION
NO. 3 : DVD +B PROTECT
NO. 3NO. 1
NO. 2 : Speaker abnormal
Error Explanation
10* CAM error. Can't detect CAM switch when CAM is moving.
11* When it detect cam operation error during initialize pro-
cess.
20* TRAY error. Can't detect TRAY switch when TRAY is mov-
ing.
21* When it detect TRAY operation error during initialize pro-
cess.
30 When it change to DVD/CD function, DVD cannot read ini-
tial data.

CD-SW250DVD
2 – 3
[5] TEST Mode
1. TEST Mode Functions
1.1. Entering the TEST Mode
While holding down both the button and the X-BASS/DEMO button
of the main unit from the power-off state, press the ON/STAND-BY
button to enter the Test Menu Mode.
1.2. Test mode processing
• When entering the TEST Mode, the ROM version are displayed as
follows.
Version on the FL display: BD***** (****: Version No.)
1.3. TEST Mode button
• Press direct designation button during the version display to enter
the specified TEST Mode as shown below.
TEST MODE
1.4. Canceling TEST Mode
1. Press the ON/STAND-BY button in each TEST Mode.
2. It is necessary to play-off the A/C cord after “FINISHED” is dis-
played on the FL for SHIPPING TEST
2. Shipping TEST Mode
2.1. Outline
• ID command for initialization is sent to the DVD unit and E2PROM
in the unit is initialized.
• System Microcomputer and DVD changer initializerd
2.2. TEST Mode Operation
When entering the Shipping TEST Mode:
1. “WAIT” is displayed on the FL display.
2. “FINISHED” shall be kept displaying after Initiation is completed.
Manually play off the A/C cord to get out of the TEST Mode.
When lnitialization is failed, “ERR” remains to be shown on the FL
display until play off the A/C cord.
2.3. Supplementary Note
1. When entering this TEST Mode, it is prohibited to press any key
until the above processing is completed.
3. DVD TEST Mode
3.1. Outline
• To send key codes of the TEST Mode 1 to the DVD unit to start the
TEST Mode.
• Thereafter the system’s microcomputer only sends key codes to
the DVD unit.
• The main unit operation is started in the same way as the normal
startup of the DVD/CD Function.
• Only monitor (video) output is normally controlled. “MUTE ON”
remained.
• During this TEST Mode, “DV******” (******: dvd version is shown on
the FL display.
(Display is shown by OSD. Main unit display not available.)
3.2. TEST Mode Operation
1. The TEST Mode is started in the same way as the normal startup of
the DVD/CD Function. Then the DVD unit is normally started. Dur-
ing the TEST Mode, “DV******” is continuously displayed.
No. TEST Mode Direct Designation Button
1 SHIPPING TEST open/close
2 DVD TEST DVD/CD
3 DVD DISPLAY TEST disc 2

CD-SW250DVD
2 – 4
3.3. DVD TEST Mode
1. Press the DISC2 buttonon the main unit from the TEST Mode
initial condition to enter "DVD TEST".
(Press the "1" key of the remote control.)
(TEST Mode initial screen)
Press SKIP UP/DOWN button to move to next page
Press RETURN button to return to initial screen.
TEST MODE 1/2
MODEL
DATE
F/E VER
B/E VER
RO*: Region No.
S/N
VER DV
TEST MODE 2/2
VIDEO UCODE VER
AC-3 UCODE VER
OTS UCODE VER
LPCM UCODE VER
MPEG-BC UCODE VER
JPGE UCODE VER
CDDA UCODE VER
MP3 UCODE VER
WMA UCODE VER
DET UCODE VER
NOISE UCODE VER
F0000000 00000000
Note:
1. Press the DISC2 button on the main unit from the TEST Mode
initial condition to enter "DVD TEST".
LASER TEST Mode
(TEST MODE iitial screen)
The screen display as shown on the left.
The spin rotates
approx. 1 sec.
The pick slightly moves
in the circumference
direction.
DVD Laser lights on.
DYNAMIC TEST
LASER TEST
DVD LASER ON DVD laser lights off and
CD laser lights on.
The spin rotates approx.
1 sec.
The pick slightly moves in
the circumference direction.
LASER TEST
CD LASER ON
1 : LASER TEST
2 : STEP TEST
3 : PLAY TEST
4 : PLAY TEST NO TRAY
Press the (3) key.
F0000000 00000000
Press the (1) key. Press the (1) key.
Press the (1) key.
Laser lights off.
The spin rotates approx.
1 sec.
The pick slightly moves in
the circumference direction.
LASER TEST
LASER OFF
Press the (1) key to shift to "DVD LASER ON".
Press the "STOP" key to return to the "DYNAMIC TEST" screen.

CD-SW250DVD
2 – 5
1. Press the DISC2 button on the main unit from the TEST Mode
initial condition to enter DVD TEST.
(TEST MODE initial screen)
Step Execute Mode
F0000000 00000000
The screen display as shown on the left.
DYNAMIC TEST
1:LASER TEST
2:STEP TEST
3:PLAY TEST
4:PLAY TEST NO TRAY
Press the (3) key.
Open the tray manually.
Put the disc on the tray and close it.
STEP TEST
TRAY OPEN
Press the (2) key.
Media judgement
"0 0 0 0": 4-digit alphanumeric
STEP TEST
MEDIA JUDGE
DVD
0000SGC10000SGC0
0000FEOFFSET10000FEOFFSET0
0000TEOFFSET10000TEOFFSET0
FGAIN0
Press the "PLAY" key.
Press the "STOP" key to return to the DYNAMIC TEST screen.
Turn the power off to exit the TEST MODE.
Press the "STOP" key to return to the DYNAMIC TEST screen.
Turn the power off to exit the TEST MODE.
FGAIN1
TGAIN0 TGAIN1
FBAL0 FBAL1
TBAL0 TBAL1
3TBST0 3TBST1
Media judgement
"0 0 0 0": 4-digit alphanumeric
STEP TEST
MEDIA JUDGE
CD
SGC10000SGC0
FEOFFSET10000FEOFFSET0
TEOFFSET10000TEOFFSET0
FGAIN0
Press the "PLAY" key.
FGAIN1
TGAIN0 TGAIN1
FBAL0 FBAL1
TBAL0 TBAL1
3TBST0 3TBST1
Focus On
"0 0 0 0": 4-digit alphanumeric
STEP TEST
FOCUS ON
DVD
0000SGC10000SGC0
0000FEOFFSET10000FEOFFSET0
0000TEOFFSET10000TEOFFSET0
FGAIN0
Press the "PLAY" key.
FGAIN1
TGAIN0 TGAIN1
FBAL0 FBAL1
TBAL0 TBAL1
3TBST0 3TBST1
Focus On
"0 0 0 0": 4-digit alphanumeric
STEP TEST
FOCUS ON
CD
SGC10000SGC0
FEOFFSET10000FEOFFSET0
TEOFFSET10000TEOFFSET0
FGAIN0
Press the "PLAY" key.
FGAIN1
TGAIN0 TGAIN1
FBAL0 FBAL1
TBAL0 TBAL1
3TBST0 3TBST1
Tracking On
"0 0 0 0": 4-digit alphanumeric
STEP TEST
TRACKING ON
DVD
0000SGC10000
00000000
SGC0
0000FEOFFSET10000FEOFFSET0
0000TEOFFSET10000TEOFFSET0
FGAIN0
Press the "PLAY" key.
FGAIN1
TGAIN0 TGAIN1
FBAL0 FBAL1
TBAL0 TBAL1
3TBST0 3TBST1
Tracking On
"0 0 0 0": 4-digit alphanumeric
STEP TEST
TRACKING ON
CD
SGC10000
0000
SGC0
FEOFFSET10000FEOFFSET0
TEOFFSET10000TEOFFSET0
FGAIN0
Press the "PLAY" key.
FGAIN1
TGAIN0 TGAIN1
FBAL0 FBAL1
TBAL0 TBAL1
3TBST0 3TBST1
Auto gain control adjustment
"0 0 0 0": 4-digit alphanumeric
STEP TEST
AGC STUDY
DVD
0000SGC10000
00000000
00000000
00000000
SGC0
0000FEOFFSET10000FEOFFSET0
0000TEOFFSET10000TEOFFSET0
FGAIN0
Press the "PLAY" key.
FGAIN1
TGAIN0 TGAIN1
FBAL0 FBAL1
TBAL0 TBAL1
3TBST0 3TBST1
Auto gain control adjustment
"0 0 0 0": 4-digit alphanumeric
STEP TEST
AGC STUDY
CD
SGC10000
0000
0000
0000
SGC0
FEOFFSET10000FEOFFSET0
TEOFFSET10000TEOFFSET0
FGAIN0
Press the "PLAY" key.
FGAIN1
TGAIN0 TGAIN1
FBAL0 FBAL1
TBAL0 TBAL1
3TBST0 3TBST1
Focus balance adjustment
"0 0 0 0": 4-digit alphanumeric
STEP TEST
3TBST FBAL STUDY
DVD
0000SGC10000
00000000
00000000
00000000
00000000
00000000
SGC0
0000FEOFFSET10000FEOFFSET0
0000TEOFFSET10000TEOFFSET0
FGAIN0
Press the "PLAY" key.
FGAIN1
TGAIN0 TGAIN1
FBAL0 FBAL1
TBAL0 TBAL1
3TBST0 3TBST1
Focus balance adjustment
"0 0 0 0": 4-digit alphanumeric
STEP TEST
3TBST FBAL STUDY
CD
SGC10000
0000
0000
0000
0000
0000
SGC0
FEOFFSET10000FEOFFSET0
TEOFFSET10000TEOFFSET0
FGAIN0
Press the "PLAY" key.
FGAIN1
TGAIN0 TGAIN1
FBAL0 FBAL1
TBAL0 TBAL1
3TBST0 3TBST1
Play test
8-digit numeric of DVD ID grows
"0 0 0 0": 4-digit alphanumeric
Play test
6-digit numeric of TIME grows
"0 0 0 0": 4-digit alphanumeric
PLAY TEST
DVD ID 8-digit numeric
0000SGC10000
00000000
00000000
00000000
00000000
00000000
SGC0
0000FEOFFSET10000FEOFFSET0
0000TEOFFSET10000TEOFFSET0
FGAIN0
Press the "PLAY" key.
FGAIN1
TGAIN0 TGAIN1
FBAL0 FBAL1
TBAL0 TBAL1
3TBST0 3TBST1
PLAY TEST
CD NO2-digit numeric TIME6-digit numeric
SGC10000
0000
0000
0000
0000
0000
SGC0
FEOFFSET10000FEOFFSET0
TEOFFSET10000TEOFFSET0
FGAIN0
Press the "PLAY" key.
FGAIN1
TGAIN0 TGAIN1
FBAL0 FBAL1
TBAL0 TBAL1
3TBST0 3TBST1

CD-SW250DVD
2 – 6
3.4. ROM Rewrite Mode
1. Creating version upgrade disc
• Write the following three files on CD-R/CD-RW.
• ********.upd
(********: Names differ according to versions)
• Write the files at lowest possible speed.
• Do not mix other data.
2. During normal power-on, insert the version upgrade disc.
3. Normal disc reading process is started. After finish toc read pro-
cess. The version are displayed on OSD..
OSD display (Example)
4. Select the desired ROM data using cursor ↑,↓keys, then press
ENTER. Then the Flash Rom rewrite is entered. OSD will display
“Now Opdate”
OSD display (Example)
5. When rewrite is normally completed, OSD will off. (Screen become
black for a while).
6. Then logo will appear in OSD again as normal DVD start up pro-
cess.
7. Confirming the version
• A few moments after entering the DVD TEST Mode, “VD ******”
is displayed on the main unit.
(******: 6-digit numeric version code)
• To confirm the detailed version information, press the “1” key of
the remote control.
The system information is displayed on the OSD display.
(“********”: Version name) Check that the version name con-
forms to the write data.
8. Press the POWER button to exit the test mode
9. Enter to DVD TEST Mode again and press DISC5 button to initial-
ize the DVD software.
• The unit will Power on and off automatically and “COMPLETE”
will be displayed on the FL display after completed.
File system Browse
Directory:/
Please select a file 01/01
./
../ DVDXLG42K .upd
Now Update...
Description of version name
Example: VER: DV50413B
From the left:
DV : DVD model
50413B:Version
*The format may be changed.

CD-SW250DVD
2 – 7
3.5. DVD Display Test
To display servo adjustment values, error rates, laser current, etc. during DVD playback.
1. Press the DISC 1 button on the main unit from the TEST Mode initial condition.
2. The main unit poeration is started in the same way as the normal stand-up of the DVD/CD function.
3. Press the Tuner/Band button to display DVD adjustment values, etc. Press it again and the display disappears and the normal screen returns.
The error rates displayed are for reference; they are not the judging criteria.
4. Press the “Power” button to cancel this mode.
DVD
Average error rate
Audio buffer space Video buffer space Number of error occurrence
FG0 TG0 TG1FG1 FBL0 TBL0 TBL1FBL1
TitleNo ChapNo
CD
Audio buffer space Video buffer space Number of error occurrence
TrNo TIME
Sector ID

CD-SW250DVD
2 – 8
[6] CD Changer mechanism section
• A number in the drawing sheet is the number of the parts guide
(CHANGER MECHANISM PARTS).
140
141
HALF GEAR
MUST ARRANGE AS SHOWN
1

CD-SW250DVD
2 – 9
139
2
APPLY SANKOL BEFORE FIX
FIX ITEM 1 ACCORDING TO THE
SHOWN PICTURE ABOVE
ROTATE MODE BIG GEAR UNTIL REACH AS SHOWN IN PICTURE

CD-SW250DVD
2 – 10
APPLY GREASE
PULL THE LEVER UNITIL
REACH THE ARROW MARK
143
112
3

CD-SW250DVD
2 – 11
FIGURE 1
FIGURE 2
APPLY GREASE SLOT CLAMP SW ARM INSIDE BASE SLOT
152
142
118
4

CD-SW250DVD
2 – 12
127
128
5
APPLY GREASE AT BOTTOM SIDE
OF GEAR FOLLOW MARKING
NO NEED APPLY GREASE AT BOTTOM
SIDE
O.K
BLACK MARK
FIGURE 1
N.G
OTHER THAN FIGURE 1 DIRECTION ALL N.G
APPLY GREASE AT
TOP SIDE OF GEAR
FOLLOW MARKING

CD-SW250DVD
2 – 13
APPLY GREASE AT
HALF GEAR AREA
ROTATE CLOCKWISE UNTIL REACH HERE (MAXIMUM)
6
129