Sony D-99 - Service Mode Operations; Laser Diode Emission Check Procedures; Service Mode Setting Method; Service Mode Operation Steps

D-99
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to
be focused on the disc reflective surface by the objective
lens in the Optical pick-up block, Therefore, when checking
the laser diode emission, observe more than 30cm away from
the objective lens,
Laser Diode Check Procedure
The laser diode on this set will not emit unless the top
panel is closed and S901 is turned on, The laser diode will
always emit even if focus search is not performed in service
mode,
Procedure 1 (service mode or normal operation)
Check the laser diode emission with the eye.
1, Open top panel,
2, Turn on S901 in Fig. 1,
(In service mode, this operation is not necessary.)
3. Press the Pll key.
(In service mode, this operation is not necessary.)
4, Observe the objective lens and confirm that the
laser diode is emitting light, At this time, the laser
diode goes on about 10 seconds due to focus serarch,
Procedure 2 (service mode or normal operation)
Check by the current with flows in the laser diode,
1, Close the top panel.
2. Remove the main board and read the current value
on the label affixed to the Optical pick-up block,
(Label on Optical pick-up block)
KSS—220A
JAPAN
$123
546
current value
This means 54.6mA,
3. Connect a VOM to TPl and TP2 (both side of R510:
10Q)
. Press the Dil key.
. Calculate the current by the VOM reading,
VOM reading (V) +resistance of R510=current (A)
ex, VOM reading=0,56V
0,56+10=0,056 (A) =56 (mA)
6. Confirm that the ammeter reading is within the
range given below,
value on labelt#,;mA (25°C)
variation relative to temperature :0.4mA//°C
(Current increases when temperature rises and
decreases when it drops.)
or &
SERVICE MODE (service program)
*Step 1 (Service Mode setting method)
1, Turn the HOLD switch to OFF with the external power
supply not plugged in (no power applied to set),
2. Press the Dll key.
3. Solder jumper TEST terminal,
(IC801 pin@ BAT-E is grounded.)
4, Plug in external power supply.
This puts the set into service mode,
*Step 2 (Service Mode operation)
1, When service mode is set, the display will change 6
times, and those 6 changes will be repeated over and
over,
Even if LCD dose not display, other operations will
be performed,
2, When Dp or Kd key is pressed, the optical pick-up block
moves to the inside or outside circumference, Tracking
servo and sled servo go off when this is done, so press
KEY-MODE to turn on the tracking servo if necessary.
3. When REMAIN is pressed, the display stops, When
REMAIN is released, the display continues to change.
This allows check of each segment,
4, When }>lIl Key is pressed, CLV-S (pull-in mode) starts
while performing focus search, When there is no disc
installed, focus search is repeated with rotating disc
motor,
5, When KEY-MODE is pressed, tracking servo, sled servo
and CLV-A (servo during PLAY) go ON,
6. When 4 and 5 are performed, the disc begins to play.
At this time, the top panel should be closed and S901
are to be ON, A sound is not produced as muting is ON,
7, All servo (focus, tracking, sled and spindle) go off when
Mikey is pressed. Disc motor rotate by inertia for a
some time,
Cay,
$901 (OPEN,“CLOSE switch)
PPI Fr)
Optical pick-up block goes to
outside circumference
goes to inside (display stop)
circumference
(FR)
[see
pick-up
a
REMAIN
W@ (STOP)
) (servo all off]
KEY-MODE
Cee servo and
sled servo on
p> II (PLAY/PAUSE)
% Be sure to keep HOLD FOCUS on and CLV-S
switch OFF.|f not, the set ( mode (RUN-UP mode) sie)
cannot receive the input
from each keys. Fig.1
*Step 3 (Service Mode release)
1, First be sure to unplug the external power supply.
2, Then remove the solder jumper TEST terminal,
3, The set will now operated normally,
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