– 2 –
TABLE OF CONTENTS
1.
SERVICE NOTE
....................................................... 2
2.
GENERAL
................................................................... 5
3.
DISASSEMBLY
......................................................... 6
4.
MECHANICAL ADJUSTMENT
.......................... 11
5.
ELECTRICAL ADJUSTMENT
............................ 11
6.
DIAGRAMS
6-1. Block Diagram ................................................................ 13
6-2. Schematic Diagram –MAIN Section – ........................... 15
6-3. Printed wiring Board –MAIN Section – ......................... 19
6-4. Printed wiring Board – TMR Section – .......................... 22
6-5. Schematic Diagram – TMR Section – ............................ 25
6-6. IC Pin Function Description ........................................... 29
7.
EXPLODED VIEWS
................................................ 30
8.
ELECTRICAL PARTS LIST
............................... 33
Notes on chip component replacement
•
Never reuse a disconnected chip component.
•
Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
Flexible Circuit Board Repairing
•
Keep the temperature of the soldering iron around 270 ˚C dur-
ing repairing.
•
Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
•
Be careful not to apply force on the conductor when soldering
or unsoldering.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK
!
OR DOTTED
LINE WITH MARK
!
ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.
SECTION 1
SERVICE NOTE
Service Mode
Mode for operating the mechanism section with the MAIN board
and TMR board opened.
1. Setting
1) Refer to “3. Disassembly”, and remove the cabinet and open
the MAIN board and TMR board.
2) Connect the motor and plunger to the MAIN board using
jumper wires. These can be connected easily with the use of
the extension tool (1-769-143-11) (ten in one set).
3) Turn OFF the
[BL SKIP]
switch (S703).
4) Connect the MAIN board to the TMR board using flexible
board for service only.
5) Press the
œ
REPEAT switch (S3),
[FF]
switch (S2) and
supply 1.2V to the
‘
and
’
terminals of the battery using a
regulated power supply.
2. Preset state
To set the PLAY, FF, REW modes, the preset state must be set.
1) Check that the lever (SW) and F/R switch (S702) are set to the
center position. If not, set the preset state as follows.
2) Move the F/R switch (S702) to the side which the lever (SW)
is facing.
3) The lever (SW) will move when the regulated power supply
switch is set to OFF once and then set to ON. Move the F/R
switch (S702) according to this timing and set to the center
position.
3. FF, REW Modes
1) Check that the preset state is set and press the
[FF]
and
[REW]
switches.
4. PLAY mode
1) Check that the preset state is set.
2) Pressing the
œ
REPEAT switch on the keyboard unit will
move the lever (SW) once towards the F side and then to the R
side. Moving the F/R switch (S702) according to this timing
will set the PLAY mode (R side). Pressing the
œ
REPEAT
switch another time and moving the F/R switch (S702) ac-
cording to the movement of the lever (SW) will set the PLAY
(F side) mode.
Note 1: If the above fails, perform from preset again.
Note 2: Do not touch the
œ
,
p
, FF, REW switches with your
hands, but using a stick with a round tip.
Note 3: When using headphones, the timing for moving the S702
can be determined from the beep sound.
