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.
DCD-500AE
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.
Oct. Nov. and Dec. are expressed by alphabetical letters
of X, Y and Z.
lop No.
10110
LD drive currentquality control
The expressed unit is by mA, with omission of the
decimal point as for example, 56.5mA will be expressed as 565, but the head of English letter means
the control in the manufacturning plant.
-1
Pin Connector
KSS-213C
Pin No.Description
1PDIC VcIN
2VccIN
3EOUT
4DOUT
5AOUT
6BOUT
7COUT
1 3 5 7 9 11 13 15
2 4 6 8 10 12 14 16
8FOUT
Flexible flat cable connector
+2.5V +5V
CAUTION: The soldered connecting portion must be bridged when removing CN54.
The laser pick-up KSS-213C is assembled and precisely
adjusted using a sophisticated manufacturing process in our
plant. Do not disassemble or attempt to readjust it. Please
observe the following instructions carefully in handling the
pick-up.
(2) Please take care for preventing from shock by falling
down or careless handling.
2. Laser Diode (LD)
(1) Protect your eyes
The laser beam may damage the human eye, since the
intensity of the focused spot may reach 7x10
W/cm2even if the intensity at the objective lens is 400µW
maximum. As the light beam spreads after focused
through the objective lens, it does not effect you in the
place as far as more than 30 cms. However, do not look
at the laser light beam either through the objective lens
directly nor another lens or a mirror.
(2) Poison of As
Since the LD chip contains As (Arsenic), as GaAs +
GaAlAs, as known as the poison, although the poison is
relatively weak, in comparing with others, e.g. As
etc., and the amount is small, avoid putting the
AsCl
3
chip in acid or an alkali solution, heating it over 200 °C
or putting it into your mouth.
(3) Avoid surge current or electrostatic discharge
The LD may be damaged or deteriorated by its own
strong light if a large current is supplied to it, even if only
a short pulse.
Make sure that there is no surge current in the LD driving
circuit by switches or else. Be careful to handle pick-up
as it may be damaged in a moment by human
electrostatic discharge. The pins of the LD are shortcircuited by solder for protection during shipment.
For safety handling of an LD, grounding the human body,
measuring equipments and jig is strongly recommended.
And still it is further desirable to make use of mat on the
platform and floor for handling the LD.
To open the short-circuit, remove the soldering quickly
with a soldering iron whose metal part is grounded.
The temperature of the soldering iron should be less than
320°C (30W).
2O3
4. Metal Bearing
As the metal bearing of Cu-compound sintered alloy is
impregnated with FROIL946P, never fail to supply the
bushing with the same lubricant at the time of replacing the
pick-up.
5. Handling
Please handle the laser pick-up with holding the slide base.
(resin molded part).
When either a part of human body or some other things may
happen to touch directly with the circuit part of P.W.Board, it
may cause deterioration, take careful attention in handling
this base.
6. Deterioration
As KSS-213C comprises built-in RF Amp and APC circuit,
resists stronger against external electrostatic damages than
the former typed pickup. However, there is possibility of
3
pickup deterioration in the following cases.
(1) Low HF level, or with great numbers of jitters.
(2) Tracking offset (EF Balance) is out of order (Refer to
“Confirmation Method of Adjustment” for confirmation (1)
and (2)).
,
3. Actuator
(1) The performance of the actuator may be affected if
magnetic material is located nearby, since the actuator
has a strong magnetic circuit. Do not permit dust to enter
through the clearance of the cover.
(2) Cleaning the lens
It may change the specifications by attaching dust or
ash on the objective lens. Clean the lens with a cleaning
paper dampened with, not pressing lens with so much
strength by the cleaning paper.
turned to ON while pressing the Stop ()
button on Main Unit.
“DCD500DNC100” is displayed.
② Press the Skip () button continuously
for over 3 seconds to display the version number of main micro computer.
③ While the version number of main micro com-
puter is displayed, press the Play/Pause
() button continuously for over 3 sec-
/
onds to start heat run. is lit, is flashing and the other part of the FL tube is
displayed in the same way as normal play
mode. Count this as the 0th heat run repetition.
1)Play from the first to last track on disc.
2)After disc playback has finished, pickup is
moved to innermost position.
3)The tray is opened and the heat run repetition number is incremented (increased by 1).
4)The tray is closed.
5)TOC is re-read. Conduct 1) to 5) repeatedly.
・If the TIME button is pressed while operating,
number of heat run is displayed for 1 second.
・While heat run, the operation of each button is
not valid except the TIME button.
・POWER switch is turned to OFF to clear heat
run mode.
・If an error occurs, display the error and stop
operation at that point. Number of operations
held.
Press the Skip () button while the error is
displayed. and are lit. And number of
heat run repetition is displayed for 5 second and
then the error display reappears.
Press the Skip() button while the error is
displayed. and are lit. And Number of
track and elapsed time of track being played in
time when error occured are displayed for 5
second and then the error display reappears.
xx-xxxx-xx :The version number of main micro
xx: Number of music being played
mm:ss: Elapsed time of music being played
xxxx: Number of heat run repetition
Error Code Content
E1-00Disc cannot be detected.
E2-00Focus servo could not follow dur-
E3-00TOC could not be read within
xxxx: Number of heat run repetition
xx: Number of track in time when error
mm:ss: Elapsed time of track being played in
5
C
D
x
computer
D
C
D
C
occured
time when error occured
0
D
x
xxx
-
x
x
x
E
ing playback.
specified time.
x
x
0
-
DCN
x
m
0
0
m
-
m
x
x
m
ヒートランモード
Noモード操 作 と 機 能表 示
① DISC をセットした状態で本体の Stop()
0
0
1
x
x
s
s
:
1ヒートランモード
x
x
x
x
x
x
s
s
:
エラー時のヒート
2
ラン回数表示モー
ド
エラー時の曲番と
3
時間表示モード
ボタンを押しながら、POWER スイッチを ON
にします。モデル名DCD500DNC100を表示
します。
for over 3 seconds to display the version number of main micro computer.
① POWER switch is turned to ON while press-
ing the Stop () button on Main Unit.
② Press the Skip()button continuously
for over 3 seconds to display number of Laser
ON time count.
・The number of time when the normal playback
time the Laser is turned to ON is incremented
(increased by 1) in every 15 minutes. The
accumulation number of times is recorded to
memory whenever count it.
POWER switch is turned to ON while pressing
the TIME button on Main Unit.
・Brightness setting of display becomes 100%
(default).
・The accumulation number of laser on time is
cleared, and a count becomes 0000.
x
x
xxx
-
xx-xxxx-xx : The version number of main micro
computer
L
D
-
xxxx: Number of Laser ON time count
Not special display
xxx
サービスモード
Noモード操 作 と 機 能表 示
①本体の Stop()ボタンを押しながら、
マイコンのバー
x
-
x
x
1
ジョン番号表示
モード
x
レーザー ON 時間
2
カウント回数表示
モード
3初期化モード
POWER スイッチを ON にします。
② Skip()ボタンを3秒以上押し、マイコ
ンのバージョン番号を表示させます。
①本体の Stop()ボタンを押しながら、
POWER スイッチを ON にします。
② Skip()ボタンを3秒以上押し、レー
ザーON 時間カウント回数を表示させます。
・通常再生時にレーザーを ON にしている時間
を15分毎にカウントアップします。カウン
ト時に累積回数を記憶します。
本体 TIME ボタンを押しながら、POWER スイッ
チを ON にします。
・FL 管の輝度設定を 100%( デフォルト ) にし
ます。
・レーザーON 時間カウントの累積回数をクリ
アします。
x
xxx
-
x
x
x
x
x
xxx
-
xx-xxxx-xx :メインマイコンのバージョン番号
L
D
-
xxxx:レーザー ON 時間カウント回数
なし
11
CD TEST MODE & SERVICE MODE
DCD-500AE
12
TROUBLE SHOOTING
DCD-500AE
13
DCD-500AE
14
WAVEFORMS
DCD-500AE
MAIN P.W.B. UNIT
15
WAVE-FORMS OF EACH POINT
DCD-500AE
16
2. READING
DCD-500AE
17
DCD-500AE
18
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