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For Japan model
Ver. 1
SERVICE MANUAL
MODEL DCD-SA100
SUPER AUDIO CD PLAYER
For purposes of improvement, specifications and
design are subject to change without notice.
Please use this service manual with referring to the
operating instructions without fail.
Some illustrations using in this service manual are
slightly different from the actual set.
16-11, YUSHIMA 3-CHOME, BUNKYOU-KU, TOKYO 113-0034 JAPAN
S-1130V.01 DE/CDM 0307
DCD-SA100 2
SAFETY PRECAUTIONS
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.
500V
1M
(1)
(2)
(1)
(2)
2
DCD-SA100 3
3
DCD-SA100 4
4
DCD-SA100 5
DIAGNOSTICS OF OPTICAL PICKUP
AND REPLACING TRAVERSE UNIT
Make failure diagnostics of the Optical Pickup as follows.
If the laser drive current (Iop) becomes more than 1.5 times of
the initial value, the Optical Pickup should be replaced.
The laser drive current is registered on the seal attached to
the rear of the Mecha.Unit.
In case of replacing the Pickup, change the whole part of the
Traverse Unit.
No mechanical adjustment is necessary after the replace-
ment.
Disc no read,unsteady playback, etc.
Laser drive current (Iop) check
HF wave form check
(Refer to page 78)
Present value exceeds the ini-
tial value by 1.5 times
Traverse Unit replacing
(See page 8 for details)
Laser current registering after replacement.
Step: Disc playback
Write the measured value on the seal attached to the
Mecha. Unit
*As to the measuring method, refer to page 6,7.
5
DCD-SA100 6
1. Label Indication of SACD Mechanism.
DVD mA
CD mA
2. Note for Handling the Laser Pick-Up
the protection for the damage of laser diode.
If you want to change the optical device unit from any other
units, you must keep the following.
(1) It should be done at the desk already took measures the
static electricity in care of removing the OPU's (Optical
device unit) connector cable.
(2) Workers should be put on the "Earth Band".
(3) It should be done to add the solder to the short land to
prevent the broken Laser diode before removing the 24P
FFC cable.
(4) Don't touch OPU's connector parts carelessly.
3. Replacement of the Laser Pick-up
(Traverse Unit)
Check the Iop(Laser drive current)
If the present Iop (current) value exceeds.+50% of the ini-
tial value, replace the Traverse unit(Laser Pick-up) with a
new one.
4. Iop Measurement Method
When measuring Laser drive current (Iop), playback the
discs (CD,SACD) described below, measure Iop for CD
Laser and DVD Laser by the test point (+5V-M2~
LD(CD),LD(DVD))on the SACD P.W.B.
Test Disc :SACD/Philips DAC Test Disc or commercially
available discs.
:CD/TCD-784 (manufactured by ALMEDIO INC)
or commercially available discs.
6
DCD-SA100 7
4.1. DVD Laser current measurement
LD(DVD) LD(DVD)
+5V-A2 +5V-A2
Oscilloscope Oscilloscope
(1) Connect the oscilloscope to +5V-M2 of test point for GND
side and LD(DVD) of test point for signal side.
(2) Playback the multilayer track 1 of the SACD Test Disc.
(3) Measure the voltage between +5V-M2 and LD(DVD), cal-
culate Iop by the formula as shown below.
Measurement Voltage Value
Iop = ----------------------------------------------------------------------------
-
14 (Resistance value)
4.2. CD Laser current measurement
(1) Connect the oscilloscope to +5V-M2 of test point for
GND side and LD(CD) of test point for signal side.
(2) Playback the track 1 of the CD Test Disc.
(3) Measure the voltage between +5V-M2 and LD(CD), cal-
culate Iop by the formula as shown below.
Measurement Voltage Value
Iop = ----------------------------------------------------------------------------
-
11.75 (Resistance value)
LD (CD)
LD (DVD)
+5V-M2
1U-3562 SACD MODULE P.W.B. unit foil side
7
DCD-SA100 8
8
DCD-SA100 9
9
DCD-SA100 10
10
DCD-SA100 11
11
DCD-SA100 12
SETTING UP THE TEST MODE
(1) Setting up