Technics SL-PD665

SL-PD687
@ Check the servo P.C.B.
7. Remove the mechanism base ass'y. (See Ref.No.12 of the disassembly instructions.)
8. Remove the traverse deck ass'y. (See Ref.No.27 of the disassembly instructions.)
Front panel ass'y
Place the front panel
‘ass on the right side
of the unit
Traverse deck assy
FEC of servo P.C.B. ‘Change the FEG
Fig. 4
10. Connect the FFC as shown in above.
98. Replace the FFC of servo P.C.B. to the FFC (CN401) of (Between CNéo1 ana CN6aT
main P.C.B. Between CN402 and CN602
11. Insert the traverse deck in the slot of mechanism base
ass'y.
12, Connect the FC of servo P.C.B. to the connector (CN301)
of main P.C.B.
18, Set the test disc on the traverse deck ass'y, and then fix
the traverse deck ass'y with clamper assy.
14. When checking the soldered surface of servo P.C.B.,
do as shown in Fig. 7.
Notes:
* After completing the check, restore the replaced FEC
to their original positions.
How to play the disc |
‘Unplug the set previously.
s NOTE:
—<—<—<——<—
[Write
pressing
3
keys
of
STOP(m),
PLAY(p>),
|
Be
sure
to
begin
pressing
the
3
and
DISC
1
simultaneously,
insert
the
power
|
keys
before
plugging
the
set.
plug
of
the
set
into
the
plug
socket.
Otherwise,
the
Service
Mode
cannot be set.
ss
Press the POWER key
(POWER ON).
No
J Fina
Withdraw hand from the 3 keys. as |
as
NOTE:
Mount the disc on the turntable
Make sure that the traverse mechanism
and prose the FLAY Key. is then in UP(PLAY)positon.
‘Service Mode setting
When checking the main/servo P.C.B. of this set, remove the rotary tray previously.
After the rotary tray is removed, the microcomputer is kept from issuing PLAY command even when the PLAY Key is pressed.
Stated above is the procedure of setting the Service Mode for keeping the microcomputer in the PLAY mode even after
removal of the rotary tray.
—n-
OPERATING THE UNIT WITHOUT THE FRONT PANEL ASS'Y
(OPERATION P.C.B. AND KEYS) ou
WTurning off the back- up power to the microprocessor(IC 401) | Main P.C.B.
1. Unplug the AC cord.
2. Short the ends of the C401 jumpers at 10 Q (SW) resistance
for at least 1 second,
BiTurning the power on again
1. Plug the AC cord back in,
2, Short the between the following jumpers simultaneously:
* The D401 cathode and R401 from IC401 (equivalent to
pressing the STOP button).
* The D401 cathode and R403 from IC401 (equivalent to
pressing the PLAY button).
* The D402 cathode and R401 from IC401 (equivalent to
pressing the DISC 1 button).
8. Keeping the above shorts in place, short between the D404
cathode and R405 from IC401 for 1 second to turn on the
power to the main unit.
4. Remove the shorts placed in step 2.
[using the machine
** To play, short between the D401 cathode and R403 from
1401 {equivalent to pressing the PLAY button).
'* To pause, short between the D401 cathode and R402 from
1C401 (equivaient to pressing the PAUSE button).
'* To stop, short between the D401 cathode and R401 from
1C401 (equivalent to pressing the STOP button).
* To move forward, short between the D402 cathode and R402
from 1C401 (equivalent to pressing the F.SKIP button).
'* To move backward, short between the D402 cathode and R403
from IC401 (equivalent to pressing the R.SKIP button).
'* To search in the forward direction, short between the D403.
cathode and R402 trom IC401 (equivalent to pressing the
F.SEARCH button).
'* To search in the backward direction, short between the D403
cathode and R403 from IC401 (equivalent to pressing the
R.SEARCH button).
inishing off
1, Unplug the AC cord.
2. Short the ends of the C401 jumpers at 10 0 (SW) resistance.
Biinstallation of the FFC
‘® When connecting the FFC, connect as shown right,
© Connect as follows:
‘Short FFC ; between Connector [5] and SHORT L] marking
Long FFC ; between Connector [[] and LONG S] marking
‘© Connect the FF (Long/Short) with biue line upward
to the operation P.C.B. connectors .
© Connect the FFC (Long/Short) with blue line outward
to the main P.C.B. connectors. Bie tind
Blue line
le (Long)
(>) *LONG™ marking
NOTE:
\
“SHORT
marking
The pin numbers of each connector are marked on the P.C.B. surface. ge non)
Blue lind
es