Technics SL-PS670A

SL-PS670A
SL-PS670A |
m Automatic Adjustment Results Display Function
(Self-Check Function)
This unit has a function that uses the FL display board to indicate the results of automatic adjustment of the
servo-circuit (tracking, focus, offset, etc.) as error codes. The error code display indicates the location of
failures from automatic adjustment circuit.
The following procedure displays the error codes from the self-diagnostic function.
e Procedure for displaying automatic adjustment codes
1. Plug in the cord and wait for the STANDBY LED to flash, indicating the unit is in standby status.
2. Turn on the power supply switch while pressing the STOP ( gg), PAUSE (II) and PLAY (> ) buttons at the same time.
3. The “Fo E_f-_” code is displayed 2 or 3 seconds later to indicate the automatic adjustment results mode.
4. Push the OPEN/CLOSE button to open the disc tray and then load the test disc (SZZP1054C).
5. Push the OPEN/CLOSE button again to close the disc tray.
6. After automatic adjustment, the code display indicates the location of failures in the servo circuit.
® Troubleshooting using the automatic adjustment code
Notes:
1. If “E-00” is displayed as an error code, this means no error was found.
2. Check the disc and laser-detector lens for damage, contamination or stains.
© Take out the test disc and turn off the power, which terminates the automatic adjustment results mode.
; Normal voltage and
: Signal
4.8V
IC702 i MCLK Pay
IC702 ©) pin
IC702 Gq pin] SENSE 0
(C702 pin FAST 3
IC702 @ pin [ss NM
F916.9344MHr F16.9544MHr
x1
IC702 Ga pin WAAL, 2.4V
2m3 OlvsDIV
IC702 @ pin wacom
(C702 @ pin| KICK
(6702 pin| FLOCK
(C702 @ in| FDET
(0702_@ pin|_ STAT
IC702 @ pin] FBAL | 25V+1.25V |2.5V+1.25V
OV
OV
1C702 qd pin| /TLOCK OV
IC702 ® pin te |s200
(7E_ pin TLOCR
FL error
code
display
Probable cause
Focus and
tracking offset
adjustments not
completed in
specified time
period.
@ Clocks X1 and X2, power supply VDD,
and reset/RST, allon IC702.
(@)MDATA, MCLK, MLD, and SENSE
signals to/from mechanism controller.
OV
T+13.6ms.
- © 2s
tev
o-P
@ Scratches or contaminants on disc
surface
@Focus and Tracking servo circuits (check
waveforms, voltages, and part values.)
© Spindle driver circuit
@® Optical pickup
Disc play unstable
mmmmmmm oCcooo0oo NOWONMAG
Best “eye” (PD
balance)
adjustment not
completed in
specified time
period.
@ Scratches or contaminants on disc
surface
@ Focus servo circuits (check waveforms,
voltages, and part values.)
@ Optical pickup
Focus or Tracking |@ Scratches or contaminants on disc
gain adjustment surface
not completed in |@Focus and Tracking servo circuit (check
specified time waveforms, voltages, and part values.)
period. © Optical pickup
IC702 pin
=99'=
@ Function of IC Terminals
e 1C401 (UPD78042A014)
a i)
Name
1
FL grid drive signal output
[woo [= |Poversunaves
[wax [o
Nor [
psa]
oO
MDATA
=r
STAT
Microprocessor command data
Status signal input
w
SUBQ
7G
§
1G
CLK Microprocessor command clock
LD
NC
Subcode Q input
iS
M
/OPEN SW Disctray “open” sense switch status
— ico)
T
/CLOSE SW
/OPEN Open Disc Tray command output
/CLOSE Close Disc Tray command output
i
i
Pe]
fl
iad
|
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as
DE
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ee
2 Ll eee
pie
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el
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iced
=i
iad
aa
ey
Reset signal input
Connect to GND
nr
4 /FLOCK Focus servo pull-in signal
/TLOCK Tracking servo pull-in signal
/S RST Reset signal output (for servo)
REST SW Innermost track sense switch status
/POWER
28 Power off command output
| VDD | Power supply (+ 5V)
GND
Ci
[ao
onnect to GND
Main clock (4.23 MHz) input
Main clock output
@ 1C703 (AN8389SE1)
Terminal
Name
4 Motor driver input
3 5
2
C
C
soe S|
[7 ier aver
| INS] Motor driver (3) input
[ao |= |ereundcemnecion |
[ne |= |reundconnesten
Pa |= |eeinseemesion
IN a Motor driver (2) input
a PC2 (power cut) input
mi [7]
Motor driver (1) input
PC1 (power cut) input
G
7 NRESET Reset input (no used, open)
Terminal ri
Name
36 P37
§ 9 No used, open
P32
eS eae pele) esis)
P31
Connect to GND
P30
/MRST
EMPH
/DMUTE
Reset signal output for MASH (IC801)
Emphasis signal output
Muting signal output
Remote control signal input
GND Connect to GND
scape STANDBY LED control signal output
/PAUSE LED PAUSE LED control signal output
/PLAY LED PLAY LED control signal output
Power supply (+ 5V)
=2/20/#-¢] 2[ | 2/6] © [6] 4/4) 5| +] a] a)
POWER SW hae Power key switch signal input
P126
§ Key return signal input
P122
P121
120 | Connect to GND
P16 : ;
5 FL anode drive signal and key scan
Pit signal output
P10
§ FL anode drive signal output
P7
Power supply terminal for FL drive
+ 32V)
FL anode drive signal output
10G
FL grid drive signal output
Bn x Soa) 2 | y~ 3B
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