Sony D-5 - Service Mode Operation Steps; Step 1: Setting Method; Step 2: Operation; Step 3: Release

D-5/D-50
PEE (PLAY/PAUSE) ed (FR)
mode (RUN-UP mode) on circumference.
FOCUS on and CLV-S | [es goes to ee)
i}
i,
REMAIN
(display stop)
MODE
tracking servo sd
sled servo on [ } : Main operation in service mode
For details, refer to step 2.
POWER
OFF ON
Be sure to set power switch on.
lf not, key inputs can not be operated.
( In case of using type “MB88541-124M”’,
n
@ (STOP)
dby
mode
bbl
(FF)
(standby
J
FOP
goes
to
outside
circumference.
if power switch is off, it causes malfunctio.
as well as key inputs can not be operated.
Fig. 2 Key Positions
Step 1 (Service Mode setting method)
1. Turn the power switch on with the external
power supply not plugged in (no power applied
to set) and press the PWM key.
(This is to discharge C803 connected to IC801
pin (RESET).)
2. Solderjumper BATT2 point.
(IC801 pin 6) (BATT-E) pin is grounded.)
3. Plug in external power supply.
This puts the set into service mode.
RESET point
pes when Penn)
/C8071,
BATT2 point
Solder jumper for service mode.
G fter checking or adjusting in service a)
be sure to remove this solder jumper.
Fig. 3 BATT2 point, RESET point Positions
Step 2 (Service Mode operation)
1.
When service mode is set, the display will
change 16 times, and those 16 changes will be
repeated over and over.
Note: Some sets using MB88541-120M for
microcomputer IC801 will not perform
LCD display.
If this happens:
1) Play a disc with the set in normal
operation.
2) In that state, solder jumper BATT2
point. (See Figure 3)
3) Short the RESET point once and
release. (See Figure 3)
4) Plug in external power supply.
With this the LCD display should be present
in service mode. Even if LCD does not display,
other operations will be performed.
When @ key is pressed during each operation,
it will return to the state in step 1.
When PP or Kg key is pressed, the FOP
moves to the inside or outside circumference.
Tracking servo and sled servo go off when this
is done, so press MODE to turn on the tracking
servo if necessary.
When REMAIN is pressed, the display stops.
When REMAIN is released, the display con-
tinues to change. This allows check of each
segment.
Whenp@ikey is pressed, focus search starts,
then CLV-S (run-up mode) starts. When there
is no disc, focus search is repeated again and
again.
Note: When MB88541-120M is used for micro-
computer IC801, the objective lens may
remain up and the disc table may rotate
at high speed when thep>™§Bkey is
pressed,
(Sets using MB88541-120M for IC801
will set FOCUS ON FLAG after the
focus on state has been obtained.)
If this happens:
1) Press @ key.
2) Unplug external power supply and
press > Bikey.
3) Plug in external power supply.
4) Press > BH key without disc inserted.
With this, focus search will repeat over and
over.
When MODE is pressed, tracking servo, sled
servo and CLV-A (servo during PLAY) go ON.
When 5 and 6 are performed, the disc begins
to play. At this time, the top panel should be
D-5/D-50
D-5/D-5
closed and S901 and S902 are to be ON.
When the laser is not emitted, focus search
is repeated. When $901 is on and $902 is off,
CLV-S does not work properly and the disc
rotates at high speed.
Step 3 (Service Mode release)
1m
2:
First be sure to unplug the external power
supply, then remove the BATT2 point solder
jumper.
(During service mode, C803 is discharged by
unplugging the external power supply. There-
fore, microcomputer IC801 is reset by next
plugging in the external power supply.)
The set will now operate normally.
MAIN BOARD (double-sided) CHECK
1.
SW pattern
The main board is double-sided, so there are
parts mounted on both sides. However, check-
ing can be done from the chip component
mounted side. Refer to the mounting diagram
on page 43 — 46.
D/A coverter IC’s are mounted underneath the
DC-DC converter unit, and these can be check-
ed from the chip component mounted side.
IC’s under the DC-DC converter unit:
1C301: D/A converter
IC101, 201: integrator, sample hold
1C302: switcher
When operating the set with the LCD module
flexible board removed, the pattern corre-
sponding to each key switch is to be grounded
momentarily,
led a
.—_
MODE"
REMAIN__swneyai
ground __-s«e6ni
Laser {]
The la
top pal
S902 (
Focus
$902 i
(termi
The la
which
Proced
S901
laser on
Ce The
is sh
<<a
SR
IQ
i
i
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