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-C635
2
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.
Service program is a special program intended for confirming servo functions etc.
2. µcom Version Check
z Refer to "Preset Functions and Operations" of the instruction manual.
z You can check the µcom version.
3. Error Data Check
z Switch on the power while pushing thebutton and REPEAT button at the same time.
z After actuating the error data check program, press the CD'sorbutton to display the logging error codes
in the occurred order.
XX Err** XX: occurred order
Err**: error code (Refer to the "Error Code Table" Page 9.)
z 10 error logs are memorized at maximum. Item 1 is newest data. Item 10 is oldest data. Item 2 is the 9th old data.
z Pressing the PAUSE button enters to data erase mode. ("Err Clear?" is displayed.)
If the PAUSE button is pressed again, the memorized error data are cleared.
To cancel the data erase mode, press the STOP button.
z To stop the Error Data check mode, please turn off the POWER switch.
NOTE: When the service is finished, delete the error logs.
4. Total Running Time
z Switch on the power while pushing the PROG. PLAY ON/OFF button and A-B button at the same time.
Total time span of CD that counted by the hour is displayed.
CD XXXXh
NOTE: Time is counted if the disc tray is opened first 30 minutes.
z Pressing the PAUSE button enters to data erase mode. ("Time Clear?" is displayed.)
If the PAUSE button is pressed again, the memorized time data are cleared.
To cancel the data erase mode, press the STOP button.
z To stop the Total Running Time check mode, please turn off the POWER switch.
NOTE: When the replacing the associated parts, delete the ranning time.
5. B.E.R. Checks and Automatic Servo Adjustment Call
z Switch on the power while pushing thebutton and END MON button at the same time.
And Loading a disc by OPEN/CLOSE button.
(1)Block Error Rate
Press the PLAY button. B.E.R. is displayed.
01Tr **m XXXX XXXX: Block Error Rate
You can select the track by the select knob.
(2)Tracking balance and Focus balance data
Press the TIME button. Tracking balance and Focus balance data is displayed.
2 ±XXX±@@@ XXX: Tracking balance
@@@: Focus balance
(3)Focus gain data
Press the END MON button. Focus gain data is displayed.
3 XXXX XXXX: Focus gain
(4)Tracking gain data
Press the REPEAT button. Tracking gain data is displayed.
4 XXXX XXXX: Tracking gain
(5)Tracking offset and Focus offset data
Press the A-B button. Tracking offset and Focus offset data is displayed.
5 ±XXX±@@@ XXX: Tracking offset
@@@: Focus offset
(6)Press the PLAY MODE button to select the Block Error Rate data.
(7)To stop the B.E.R. Check and Automatic Servo Adjustment Call mode,
please turn off the POWER switch.
No. bottonAdjustment ItemAdjustment Value indicator
-
2
3Focus Gain0576 ~ 2304
4Tracking Gain0392 ~ 1569
5
Tracking Balance
Focus Balance
Tracking Offset
Focus Offset
025 ~ +025
-
050 ~ +050
-
005 ~ +005
-
005 ~ +005
サービスプログラム
確認に必要な測定器具
●調整用ディスク:TCD784 又は CO-74176
1. サービスプログラムについて
サービスプログラムとは、サーボ機能等を確認するための特別なプログラムです。
2. マイコンバージョン確認
●取扱説明書の「プリセット機能と操作」を参照してください。
●マイコンバージョン確認ができます。
3. エラーデータ確認
●とREPEATボタンを同時に押しながら、電源スイッチを「ON」にします。
●エラーデータ確認プログラムが動作してから CD のまたはボタンを押すと、エラーの発生した順にロギングされたエ
z Switch on the power while pushing the FOLDER button and TIME button at the same time.
"000TroHR0000" is displayed. And the tray is opened.
(1)Hold the disc by the edges and place it on the disc tray.
(2)Starting with the OPEN/CLOSE button, it repeats open/close of the tray and playback.
***TrxHRXXXX ***: Track No.
x : o, c, s, t, r, and p
XXXX: Cycle quantity
All tracks are played back if the track count is less than 20.
Only the first and last tracks are played back if the tracks are more than 21.
When any errors, it stops and indicates error code (Refer to the Error Code Table).
(3)To stop the Test mode, please turn off the POWER switch.
7. Error Code Table
Error CodeCONTENTS
Error 01Unable to close the loader tray in the regulation time.
Error 02Unable to open the loader tray in the regulation time.
Error 03Inner circle switch ON error even if the time is over.
Error 04Inner circle switch OFF error even if the time is over.
Error 05The focus offset adjustment result is outside the regulation range.
Error 06Unable to adjust the focus offset in the regulation time.
Error 07The tracking offset adjustment result is outside the regulation range.
Error 08Unable to adjust the tracking offset in the regulation time.
Error 09The FE peak is outside the regulation range.
Error 0AThe FE peak is outside the regulation range.
Error 0BUnable to adjust the focus rough gain in the regulation time.
Error 0CThe focus rough gain is outside the regulation range.
Error 0DUnable to actuate focus in the regulation time.
Error 0EUnable to actuate tracking in the regulation time.
Error 0FUnable to adjust the tracking rough gain in the regulation time.
Error 10The tracking rough gain is outside the regulation range.
Error 11Unable to adjust the tracking balance in the regulation time.
Error 12The tracking balance adjustment result is outside the regulation range.
Error 13Focus servo down during automatic adjustment.
Error 14Focus servo down during automatic adjustment.
Error 15Unable to adjust the focus balance in the regulation time.
Error 16The focus balance adjustment result is outside the regulation range.
Error 17Track servo down during automatic adjustment.
Error 18Unable to adjust the focus fine gain in the regulation time.
Error 19The focus fine gain is outside the regulation range.
Error 1AUnable to adjust the tracking fine gain in the regulation time.
Error 1BThe tracking fine gain is outside the regulation range.
Error 1CUnable to adjust automatically in the regulation time.
Error 1DUnable to read the subcode Q in the regulation time.
Error 1EUnable to read the TOC in the regulation time.
Error 1FFocus servo down during search (over the regulation time).
Error 20Track servo down during search (over the regulation time).
Error 2116Servo error during search.
Error 2103Search error (over the regulation time).
Error 22Discontinuity occurred, during write to the DRAM.
Error 23The MP3 data could be read but not decoded.
Error 26The error rate when recording on the memory is over the regulation value.
Error 27The subcode jump more than regulation.
Error 28
Error 29There was a subcode Q interruption, but the content of the subcode Q is abnormal.
Retried searching repeatedly, but the sound could not be connected, resulting in an
interruption of the sound.
The servo was turned on when the power was turned on, but did not start up in the regulation time.
µCOM VERSION UPGRADE
System µcom can be upgraded in the following manner.
Version Upgrade Method
1.Record the version upgrade software on a CD-R or CD-RW disc,
only as one file with the format ISO9660 Mode-1.
The file name of the supplied version upgrade software should be used as is and this disc needs
to finalize.
2.Hold the disc by the edges and place it on the disc tray.
3.Press the OPEN/CLOSE button to start the version upgrade.
"Versi on Up"→"Push Play!" "xxxx->XXXX" are displayed.
xxxx : current version
XXXX : upgrade version
4.Press the PLAY button.
"Now Writing" → "Writing-XXX" are displayed.
XXX : count up from 000 to129
5.When the version upgrade is finished, "Complete!" is indicated.
6.Turn off the power once and turn on again.
Press the OPEN/CLOSE button and remove the disc.
NOTE: When the power is turned off before "Complete!" is displayed,
Distortion--Factor Meter
VTVM
Low-Pass Filter (20kHz)
AF Oscillator (20Hz ~ 20kHz, +18dBu)
Reference Disc; DENON Audio Technical CD (38C39-7174)
2. Output Level Adjustment
(1) Connect VTVM to the output connector of DN-C635.
Use 1:1 600 ohm Audio Transformer between the unit and VTVMs in order for matching the unbalanced input of
VTVM and the active balanced output of DN-C635 as shown in figure.
DN-C635
BALANCED
OUT
(2) Play track number "49".
(3) While reading VTVM indication, adjust VR602 (L-ch) and VR601 (R-ch) so that the output level attains +18dBu
(or desired level).
Audio Transformer
1:1
600ohm
LPF
(20kHz)
Connection for Output Level Adjustment
Distortion Meter
オーディオの確認方法
1. 必要な測定器具
ひずみ率計
VTVM
測定用フィルタ(20kHz)
AF オシレータ(20Hz 〜 20kHz,+18dBu)
調整用ディスク;DENONAudioTechnicalCD(38C39-7174)
l Part indicated with the mark "" are not always in stock and possibly to
take a long period of time for supplying, or in some case supplying of
part may be refused.
l When ordering of part, clearly indicate "1" and "I" (i) to avoid mis-
supplying.
l Ordering part without stating its part number can not be supplied.
l Part indicated with the mark "
l Not including Carbon Film Resister ±5%, 1/4W Type in the P.W.Board
parts list. (Refer to the Schematic Diagram for those parts.)
l Not including Carbon Chip Resister 1/16W Type in the P.W.Board parts
list. (Refer to the Schematic Diagram for those parts.)
WARNING:
Parts marked with this symbol
Use ONLY replacement parts recommended by the manufacturer.
ll
Resistors
l
ll
Ex.: RN14K2E182GFR
Type Shape Power Resist- Allowable Others
and per-anceerror
formance
" is not illustrated in the exploded view.
have critical characteristics.
DN-C635
5% 1/4W
1/16W
RN14K2E182GFR
26
RD : Carbon2B : 1/8W F : ±1%P : Pulse-resistant type
RC : Composition2E : 1/4W G : ±2%NL : Low noise type
RS : Metal oxide film2H : 1/2W J : ±5% NB : Non-burning type
RW : Winding3A : 1WK : ±10% FR : Fuse-resistor
RN : Metal film3D : 2WM : ±20% F : Lead wire forming
RK : Metal mixture3F : 3W
] Resistance
1 8 2⇒1800 ohm = 1.8 kohm
s
s
• Units: ohm
1 R 2⇒1.2 ohm
s
s
• Units: ohm
ll
l
Capacitors
ll
Ex.: CE04W1H2R2MBP
Type Shape Dielectric Capacity Allowable Others
CE : Aluminum foil0J : 6.3VF : ±1%HS : High stability type
electrolytic
CA : Aluminum solid1A : 10VG : ±2%BP : Non-polar type
electrolytic
CS : Tantalum electrolytic1C : 16VJ : ±5%HR : Ripple-resistant type
CQ : Film1E : 25VK : ±10%DL : For change and discharge
CK : Ceramic1V : 35VM : ±20%HF : For assuring high
CC : Ceramic1H : 50VZ : +80%U : UL part
CP : Oil2A : 100V–20%C : CSA part
CM : Mica2B : 125V P : +100%W : UL-CSA type
CF : Metallized2C : 160V–0%F : Lead wire forming
CH : Metallized2D : 200V C : ±0.25pF
3H : 5W
Indicates number of zeros after effective number.
2-digit effective number.
1-digit effective number.
2-digit effective number, decimal point indicated by R.