The following check should be performed for the continued protection of the customer and service technician.
LEAKAGE CURRENT CHECK
Before returning the unit to the customer, make sure you make either (1) a leakage current check or (2) a line to chassis
resistance check. If the leakage current exceeds 0.5 milliamps, or if the resistance from chassis to either side of the power
cord is less than 460 kohms, the unit is defective.
LASER RADIATION
Do not stare into beam or view directly with optical instruments, class 3A laser product.
DN-S3500
CAUTION
Please heed the points listed below during servicing and inspection.
◎ Heed the cautions!
Spots requiring particular attention when servicing, such as
the cabinet, parts, chassis, etc., have cautions indicated on
labels or seals. Be sure to heed these cautions and the cautions indicated in the handling instructions.
◎ Caution concerning electric shock!
(1) An AC voltage is impressed on this set, so touching inter-
nal metal parts when the set is energized could cause
electric shock. Take care to avoid electric shock, by for example using an isolating transformer and gloves when
servicing while the set is energized, unplugging the power
cord when replacing parts, etc.
(2)There are high voltage parts inside. Handle with extra care
when the set is energized.
◎
Caution concerning disassembly and assembly!
Though great care is taken when manufacturing parts from
sheet metal, there may in some rare cases be burrs on the
edges of parts which could cause injury if fingers are moved
across them. Use gloves to protect your hands.
◎ Only use designated parts!
The set's parts have specific safety properties (fire resistance, voltage resistance, etc.). For replacement parts, be
sure to use parts which have the same properties. In particular, for the important safety parts that are marked ! on wiring
diagrams and parts lists, be sure to use the designated parts.
◎ Be sure to mount parts and arrange the
wires as they were originally!
For safety reasons, some parts use tape, tubes or other insulating materials, and some parts are mounted away from the
surface of printed circuit boards. Care is also taken with the
positions of the wires inside and clamps are used to keep
wires away from heating and high voltage parts, so be sure to
set everything back as it was originally.
◎ Inspect for safety after servicing!
Check that all screws, parts and wires removed or disconnected for servicing have been put back in their original positions, inspect that no parts around the area that has been
serviced have been negatively affected, conduct an insulation
check on the external metal connectors and between the
blades of the power plug, and otherwise check that safety is
ensured.
(Insulation check procedure)
Unplug the power cord from the power outlet, disconnect the
antenna, plugs, etc., and turn the power switch on. Using a
500V insulation resistance tester, check that the insulation resistance between the terminals of the power plug and the externally exposed metal parts (antenna terminal, headphones
terminal, microphone terminal, input terminal, etc.) is 1MΩ or
greater. If it is less, the set must be inspected and repaired.
CAUTION
Many of the electric and structural parts used in the set have
special safety properties. In most cases these properties are
difficult to distinguish by sight, and using replacement parts
with higher ratings (rated power and withstand voltage) does
not necessarily guarantee that safety performance will be preserved. Parts with safety properties are indicated as shown
below on the wiring diagrams and parts lists is this service
manual. Be sure to replace them with parts with the designated part number.
(1) Schematic diagrams ... Indicated by the ! mark.
(2) Parts lists ... Indicated by the ! mark.
Concerning important safety parts
Using parts other than the designated parts
could result in electric shock, fires or other
dangerous situations.
(Follow the procedure below in reverse order when reassembling.)
Note: First of all, remove the Platter. Refer to the Instruction Manuals.
1. Bottom Plate
(1) Remove 4 screws 70 and pull out Bottom Plate.
70
Bottom Plate
70
2. Top Cover unit
(1) Remove 4 screws 71.
(2) Detach FFC ESC.
(3) Remove 2 Push Rivets 31.
(4) Disconnect Connector to remove Eject LED unit.
(5) Remove 6 screws 71.
(6) Disconnect FFC Cable and Connector.
(7) Detach Top Cover unit.
DN-S3500
71
Front ESC
71
Connector
CW121
Connector
CX032
71
31
E
ect LED unit
71
71
Note:
z Do not pull out aslant to prevent FFC cable damage.
z Do not fail to pull AC cord from wall outlet before disconnect FFC Cable.
If AC cord is remained plugged into wall outlet, power is kept supplied in the unit, which may cause danger.
3
FFC Cable
CX251
3. Motor unit
e
(1) Remove 4 screws 74.
(2) Detach Motor unit (FG3500).
74
DN-S3500
Motor unit
(FG3500)
74
4. Mecha unit
(1) Remove 2 screws 63 and 2 screws 64.
(2) Disconnect FFC cable and Connector.
(3) Detach Mecha Unit.
Mecha unit
Connector
CX061
64
63
63
FFC Cabl
CX361
Note:
z Do not pull out aslant to prevent FFC cable damage.
z Do not fail to pull AC cord from wall outlet before disconnect FFC cable.
If AC cord is remained plugged into wall outlet, power is kept supplied in the unit, which may cause danger.
4
5. Power P.W.B.
(1) Remove 6 screws 69, a screws 72 and a screws 73.
(2) Detach Power P.W.B.
DN-S3500
69
69
Power P.W.B.
73
72
69
69
6. Main P.W.B.
(1) Short-circuit the short land above.
(2) Remove a screws 65 and a screws 66.
(3) Disconnect FFC Cable and FPC Cable.
(4) Detach Main P.W.B.
Main P.W.B.
Short land for laser diode
65
FPC Cable
66
Note:
z Do not pull out aslant to prevent FFC cable damage.
FFC Cable
5
7. Shield Plate (E3 Model only)
(1) Remove 4 screws 60.
(2) Detach Shield Plate.
DN-S3500
Shield Plate
60
8. CD Mecha
(1) Remove 2 screws 63 and pull out Main Pwb Bracket.
(2) Remove 2 screws 64 and pull out Disc Guide.
Main Pwb Bracket
CD Mecha
60
63
63
Disc Guide
64
64
6
BLOCK DIAGRAM
DN-S3500
7
DN-S3500
CONFIRMING THE SERVO
What is Service Program
Service program is a special program intended for confirming servo functions etc.
Required Measuring Implement
Reference disc (TCD784 or CO-74176)
1. Contents of Service Program
Turn on the power while pressing both B button and the PARAMETER knob to set the service mode of DN-S3500. The various
check items can be selected with the PARAMETER knob, the various test items can be selected with the A, SAMP, EXIT/RELOOP,
(SAMP.)EXIT/RELOOP, and BEND buttons. Press either the PARAMETER knob or PLAY/PAUSE button to start the check
or test and display the result.
To eject the disc, press the DISC EJECT button.
To cancel the service mode, turn the power off.
PAR A ME T ER
knob
Process No.
(TRACK
Indication)
01
02
03
04"Fo_Gain"
05"Tr_Gain"Select the tracking gain. Default : 2. The operation is the same as for the Fo Gain.
06"Block_Err"The block error rate is displayed.
07"PU._Clean"
08
09
Function
(Character-display)
µcom Version check
(Version No.)
"TR_Signal"
"HF_Signal"
Automatic Servo
Adjustment call
(Servo Data)
Error Code Check
(Error Data)
Total Running Time
(Total Time)
Contents
A PARAMETER knob is pushed and a version is checked.
1. System µcom version No. : "System_XXXX"
2. DSP soft version No. : "Dsp_XXXX"
Press the PARAMETER knob to turn the tracking servo off.
When the tracking servo is off, press the PARAMETER knob to turn the tracking
servo on.
Press the PARAMETER knob to start automatic servo adjustment. When the
adjustment is completed, the adjustment data is displayed. The data can be
selected by turning the EFFECTS knob.
1. Disc check, CD/CD-RW
2. Focus gain data
3. Focus balance data
4. Focus offset data
5. Tracking gain data
6. Tracking balance data
7. Tracking offset data
8. S curve maximum
9. S curve minimum
Select the focus gain. Default : 7. Select the data with the scratch disc, then press
the PARAMETER knob to enter it. The higher the value, the higher the gain, while
the lower the value, the lower the gain.
* Do not change this without instruction from engineering.
When the PARAMETER knob is pressed, the pickup moves towards the outer
edge of the disc. The pickup lens becomes visible through the slit in the CD mechanism plate. The lens can be cleaned using a cotton swab, etc.
(Perform this operation with the top panel/cover removed and the disc ejected.)
During normal operation, the error code for the error that occurred is displayed.
Turn the EFFECTS knob to select up to 10 sets of error data stored in the memory. (See the error code table for a description of the error codes.)
・Press the PARAMETER knob to set the error data clear mode. ("Error Clear?" is
displayed.) Press the PARAMETER knob again to clear all the error data.
The total operating time of the spindle motor is displayed. A total of 65,535 hours
can be counted, in units of hours.
NOTE: If the power is turned off after 59 minutes or less, that hour is not counted.
・Press the PARAMETER knob to set the total time clear mode. ("Time Clear?" is
displayed.) Press the PARAMETER knob again to clear the total time.
サービスモード
サービスモードについて
サービスモードは、サーボ状態などを確認するための特別なプログラムです。
確認に必要な測定器具
リファレンスディスク:TCD784、CO-74176
1. サービスプログラムの内容
DN-S3500 は B ボタンとパラメータノブを両方押しながら、電源を投入するとサービスモードになります。パラメータノブで各チェック項目が、A ボタン、
SAMP ボタン、EXIT/RELOOP ボタン、(SAMP.)EXIT/RELOOP ボタン、ボタンまたは BEND ボタンで各テスト項目が選択できます。
パラメータノブを押すか、PLAY/PAUSE ボタンを押すと各項目のチェック、テストを開始し、その結果を表示します。
ディスクをイジェクトするには、DISCEJECT ボタンを押します。
サービスモードをキャンセルするには、電源を切ってください。
BEND+ button FLT all light check performed while button pressed.
-
BEND
button FLT all off check performed while button pressed.
buttonDisc eject status set while button pressed.
The disc loading/eject roller turns. The dirt can be cleaned off the roller by gently pressing a cotton swab with
propyl alcohol"
, against the roller.
(Perform this operation with the top panel/cover removed and the disc ejected.)
Servo automatic adjustment read-out value
Adjustment ItemAdjustment Value indication at character portions.
1Focus Gain0408 ~ 3248
2Focus Balance-50 ~ +50
3Focus Offset-005 ~ +005
4Tracking Gain0392 ~ 1569
5Tracking Balance-025 ~ +025
6Tracking Offset-005 ~ +005
2. TEST MODE
A button
A2 button
SAMP button
(SAMP.)EXIT
/RELOOP
button
EXIT/
RELOOP
button
Function
(Character-display)
Heat Run Test
H/R1 Normal
Chucking Test
H/R2 Tray
Platter rotation speed
check
Platter rotation speed
fine adjustment
System check
Sys. Check
Press button A1, then press the PLAY/PAUSE button to start the test.
The disc is ejected, loaded and played repeatedly.
For discs containing 20 tracks or less, all the tracks are played.
For discs containing 21 tracks or more, only the first and last tracks on the disc are played.
If an error occurs, the error code is displayed and the stop mode is set.
Press button A2, then press the PLAY/PAUSE button to start the test.
The disc load/eject, servo input and TOC reading operations are performed repeatedly.
If an error occurs, the error code is displayed and the stop mode is set.
Press button SAMP, then press the PLAY/PAUSE button. The platter starts to rotate and
revolution number is displayed.
Press the (SAMP.)EXIT/RELOOP button, then press the PLAY/PAUSE button. The Platter starts
to rotate and revolution number is displayed. The rotation speed can be adjusted to turn the
parameter knob.
Press button EXIT/RELOOP, then press the PLAY/PAUSE button to start the system check.
Once the check is completed, the results are displayed.
1. The system µcom and DSP communications are checked.
2. Reading and writing SDRAM of DSP are checked.
3. Reading and writing SDRAM of servo DSP are checked.
4. Communications between the system µcom and servo DSP are checked.
5. The CD drive operation is checked. (Inner edge switch detection is performed.)
6. The CD drive operation is checked. (Disc detection is performed.)
Once all the checks are completed, the results are displayed on the character display. The
numbers of the checks in items 1 to 6 above that were OK are displayed. If one of the checks
was not OK, the number of that item is not displayed.
Contents
3. Error Code Table (Appears only at Heat Run and Chucking Test function)
E8 00Track jumping was happened during memory of data. And unable to memorize data continuously.
TRMINSECFRAMCHARACTER
displays the track No. in
which error occurred.
Unable to close the disc holder in the regular time
Unable to open the disc holder in the regular time
The inner SW dose not turn on
Slider error
The inner SW dose not turn off
Error Indication
Displays the time at which error occurred.
H ****Operation count
E ****Error code
4. µcom update
The system µcom and DSP can be updated from a disc.
The µcom should be updated to the latest version, when GU-3689(MAIN PWB UNIT) or IC102(Flash ROM) is replaced.
(1) Creating the update disc
Use the procedure described below to create the disc for updating the system microprocessor and DSP.
① Store the update file on a CD-R or CD-RW disc in ISO9660 Mode 1 format, then finalize the disc.
・Write the distributed update files using the "DISC AT ONCE" CD writing software and finalize.
・Do not record any other software or data on the disc containing the update software.
・Do not change the file names - use the file names as distributed.
① Turn on the power and load the disc created in (1) above.
When the update disc is detected, "Version Up" is displayed. And "xxxx → yyyyy" and "Push Play!" are displayed by turns.
xxxx : Old Version No., yyyy : New Version No.
② Press the PLAY/PAUSE button. "NowLoading" is displayed and the updating procedure starts.
As updating proceeds, the playback position indicator lights in order from left to right.
NOTE: In some extremely rare cases, the updating procedure is not completed. If the updating procedure has not finished after
three minutes, there could be a problem. Turn off the power and repeat the operation from step (2) ① .
Depending on the problem that occurred, it may happen that no other operations can be performed. If this happens, GU-
3689 IC102 must be replaced. Software must be pre-recorded on the IC102. (When ordering the IC102, order the more
recent system microprocessor version number (GEN number).)
③ When updating is completed, "Complete!" is displayed and the disc is ejected.
ADJUSTMENT
* When the motor (FG-3500) is replaced, platter rotation speed adjustment is necessary.
(1) Start the Platter Rotation Speed Fine Adjust mode in the test mode. (Refer to page 9)
The actual revolution number is indicated on the lower part of the Character display. (Standard is 33rpm)
The difference from the standard revolution number is indicated on the upper part of the Character display.
(2) Turn the parameter knob. And the "D_**"(left side) of the lower part of the Character display is set to "D_77".
Then check the difference from the standard revolution number.
-
a) The difference from the standard number is
・Turn the parameter knob to set "-2%". And push the parameter knob to complete the adjustment.
b) The difference from the standard number is outside of
・Start the platter revolution check mode in the test mode. (Refer to page 9)
Present revolution number is indicated on the lower part of character display. (Standard is 33rpm)
Difference from the standard revolution number is indicated on the upper part of character display.
・Make adjustment by turning VR701 on the power unit GU-3690 so that difference from the standard revolution number
indicated on the upper part of character display becomes