Advertisement
SL-PD687
procedures for displaying the error codes are given below.
+ Procedures to display the error code
(1) Procedure to display
the error code before disassembly (finished unit)
1. When the
key is pressed while holding down the [STOP (a)
and
keys
simultaneously, the FL display illuminates, release the power turns on.
2. When the FL display illuminates, release the (STOP (i),
and
keys.
3. Press the [OPEN/CLOSE (A)] key to open the disc tray and load the test disc (SZZP1054C).
4. Press th
key to start the play operation.
5. After the time display appears, press the [STOP (M)] key to display the error code. (e.g. E-0)
6. The error code display can be used as a repair guide showing which servo circult is at fault.
(See Error Code Based Troubleshooting.)
(2) Procedure to display the error code when disassembled
1. Prepare the unit as described in "How to Check
." on pages 19, 20.
2. Press the [POWER] key while hoiding down ine (sory
and [DISC 1] keys simultaneously.
3. When the FL display illuminates, release the (STO> (m)
ind [DISC 7] keys.
4, Load the test disc (SZZP1054C) on the turntable
and secure
the clamper ass'y.
5. Perform steps 4 and 5 in section (1) above.
* Error code based troubleshooting
3K The unit is satisfactory if the error code is E-0 of E-2.
3X Before testing, check that the test disc is free of scratches and dirt and of
RF signal =>}
ind Servo.
'Traverse coil
I pickup Is clean.
FL enor
Signal to check
Normal vokage and
code | Symptom
Probable cause
7
aopiny
Signa
[Location
uy
Sror.
The following flow chart shows the sequence of automatic adjustments,
Moata | 10702 @ pin
4av
Flow chart automatic adjustment sequence
MCLK | 1C702 © pin
inant
Focus and |
clocks x1 and x2, power supply
[mio
16702 @ pin]
_—'ii=" | 48¥
T
(sum)
a
DD, and reset/AST, all on 16702
[Sense | 10702 @ pin
OV
ov
€1 | adlustments not | @ paTa, MCLK, MLO, and SENSE
completed in
signal: "te trom. mechanism
RST
1C702 @ pin
43V
4.9V.
'the specified
tones tol
aw
time period.
Sentrolier
x1 | 16702 @ pin
AMS
AM
Focus search operation: ON
x2 | 10702 @ pin
AW
AWs"
f ©
ae
=
Focus offset adjustment
Focus servo operation: ON
FE | 10702 pin
2av
uUu————_
'Tracking servo operation: OFF
te | 10702 @ pin
2a
Focus offset
adjustment
eS
® Scratches or contaminants on
adj
ES
disc surface
FOO | 1C702 @ pin
2av
'Temporary adjustment of tracking gain
e7
@ Focus and tracking servo circuits
9
{Disc play
TRO_|
1G702 @ pin
24V
'Approk. 2500
ES | unstable
ore easy me voaaes: and
arcK | 16702 @ pin
24V
Focus offset adjustment
£0
® Spindle driver circuit
TFLOGK | 16702 © pin
ov
4av
EF
® Optical pickup
IRF OET | iC702 @ pin
ov
48V
RF
'Ts701
a ie
34V
No|
STAT | 16702 © pin
'35V
ov
FRAL
| 10702
@ pin
2521.25V
2.5+1.25V
Best Eye (PD
@® Scratches or contaminants on
re tt eaven
£4 | Balance)
disc surface
RF
tarot
| Bl
Sat
Focus balance adjustment
&6
adjustment not | @® Focus and Tracking servo circuit
eC
completed in
(check waveforms, voltages, and
FE
1C702 ® pin
ov
RE:
the specified
part values.)
time period.
® Optical pickup
ITLOCK | 1C702 @ pin
ov
Fine adjustment of focus gain
OFT | 16702 @ pin
ov
* Because the microcomputer precisely performs
Focus or
@ Scratches or contaminants on
FE
| 1C702@pin
2av
adie
orp
= shew " Ate: fom:
Tracking gain
disc surface
t
sappron,
3 . Sevan s
gs:
Fine adjustment tracking gain
8 | adjustment not | @ Focus and Tracking servo circuit
as
rs
reading TOC data if a used disc is eccentric one
EA
compieted in
(check waveforms, voltages, and
ae.
(0702 @ pin
.
or its surface is warped.
the specitied
part values.)
FTLOCK | 16702 B pin
ov
4
(a0)
time period.
| @ Optical pickup
OF
[emo pn
ov
—
Advertisement
