DOWNLOAD Sony HCD-F250AV / MHC-F250AV Service Manual ↓ Size: 8.76 MB | Pages: 82 in PDF or view online for FREE

— 13 —

6

 Gear (A) (S)

5

 Claw

!º

 Two screws (+P 2 

×

 2)

!¡

 Sled motor

    (M102)

3

 Removal

     four solders.

2

 Screw (+PTPWH 2 

×

 5)

4

 BD board

1

 Wire (flat type) (16 core)

9

 Gear (B) (RP)

7

 Three claws

8

 Gear cover

3

 Remove the optical 

     pick-up to direction 
     of the arrow 

A

.

2

 Sled shaft

1

 Claw

A

— 14 —

2

 Remove the cassette lid (L) ass'y

     to direction of the arrow 

B

.

1

 Remove the cassette lid (R) ass'y

     to direction of the arrow 

A

.

A

B

3

 Three screws

     (BVTP 2.6 

×

 8)

3

 Three screws

     (BVTP 3 

×

 6) 

4

 Remove the tape mechanism

     deck section.

4

 AUDIO board

3

 Two screws

     (BTP 2.6 

×

 4)

2

 Break the soldering of two

     flexible flat cables.

1

 Four rivets

— 15 —

3

 Hang the belt.

1

 Two screws

     (BTP 2.6 

×

 8)

2

 Hang the belt.

4

 Removal the capstan motor

     to direction of the arrow.

— 16 —

*

The cold reset clears all data including preset data stored in the
RAM to initial conditions.  Execute this mode when returning
the set to the customer.

1. Press the three buttons  STOP ,  ENTER  and  FUNCTION  at

the same time.

2. The fluorescent indicator tube turns off for a moment and the

RAM is reset to the initial conditions.

*

This mode resets the set with the preset data kept stored in the
memory.  This hot reset mode is performed also when the power
cord is plugged in and out.

1. Press the three buttons  STOP ,  ENTER  and  GROUP 1  at the

same time.

2. The fluorescent indicator tube turns off for a moment and the

RAM is reset to the initial conditions.

*

The CD INITIAL clears all of the CD related data.  Execute
this mode when returning the set to the customer.

1. Press the three buttons  STOP ,  ENTER  and  GROUP 4  at the

same time.

2. The message “ALL ERASE” appears on the fluorescent

indicator tube and the CD related data is reset to the initial
conditions.

*

The CD Line test displays the rotating time required for one
rotation by rotating the disc tray.

1. Press the three buttons  STOP ,  ENTER  and  GROUP 5  at the

same time. The CD PLAY LED and the CD PAUSE LED flash
alternately and the disc tray starts rotation.

2. The message “xx << y.y” appears on the fluorescent indicator

tube. The left numbers count up the discs starting from 1 to 51.
The left numbers “y.y” indicate the rotating time required for
one rotation by rotating the disc tray.

3. To exit the CD LINE test mode, execute the MC Hot Reset.

*

The mode clears all contents of the CD disc memo.  Execute
this mode when returning the set to the customer.

1. Press the two buttons  MEMO INPUT  and  FLASH  at the

same time.

2. The message “ALL ERASE” appears on the fluorescent

indicator tube and the CD disc memo is all cleared.

*

This mode checks microprocessor version number, keys,
fluorescent tubes, LEDs and VACS (Variable Attenuation
Control System).

1. Press the three buttons  STOP ,  ENTER  and  GROUP 2  at the

same time.  The HCD-F250 enters the GC test mode, and all of
the fluorescent tubes and LEDs turn on.

2. From this state, any one of the three modes GROUP 1, GROUP

2 and GROUP 3 can be selected.  Go to step 3 to enter the
GROUP 1 test mode. Go to step 5 to enter the GROUP 2 test
mode.  Go to step 11 to enter the GROUP 3 test mode.

3. [GROUP 1 test mode ] From the state of step 2, press the

GROUP 1 button.  Every pressing of the  GROUP 1  button
advances the following check modes and displays in the given
order. Model name display, destination display, MC version
display, GC version display, DC version display, VC version
display and CC version display.

4. To exit the GC test mode and to return to the STANDBY mode,

press the  STOP ,  ENTER  and  GROUP 2  buttons again.

5. [GROUP 2 test mode ] You can enter this mode directly from

step 2.  When you performed steps 3, perform steps 4, then 1
and 2 before starting the step 5.
[GROUP 2 test mode ] From the GC test mode, press the
GROUP 2  button to enter the key check mode.  The display: K
1, J 0, V 0 appears.

6. The value after K indicates the number of times that the key is

pressed.  1 is displayed because the  GROUP 2  button has
already been pressed.

7. When other keys are pressed one after another, the key count

increases up to 42.  The keys which have already been pressed,
are not counted.

8. The value after J indicates the number of clicks that the JOG

dial is rotated.  The clockwise rotation increases the count value.
The counter-clockwise rotation decreases the count value.

9. The value after V also indicates amount of rotation of volume

control.  The clockwise rotation increases the count value.  The
counter-clockwise rotation decreases the count value.

10. To exit the GC test mode and to return to the STANDBY mode,

press the  STOP ,  ENTER and  GROUP 2  buttons again.

11. [GROUP 2 test mode ] You can enter this mode directly from

step 2.  When you performed steps 3, perform steps 4, then 1
and 2 before starting the step 5.
[GROUP 3 test mode ] From the GC test mode, press the
GROUP 3  button to enter the VACS attenuation check mode.
The display: VOL NORMAL appears.

12. To exit the GC test mode and to return to the STANDBY mode,

press the  STOP ,  ENTER  and  GROUP 2  buttons again.

*

This mode checks operation of amplifier and cassette deck.

Press the three buttons of  STOP ,  ENTER  and  GROUP 3 .  “EQ
CHECK” display on the FL tube and the VOLUME display flash.
In addition the LEDs of the JOG dial, FF and REW flash indicating
the MC test mode.

You can perform any of the following five steps.  However, it is
recommended to perform them in the following order because the
skipped cannot be performed if the checks are not performed in the
given order.
1. EQ Check Mode

The GEQ becomes maximum when the JOG dial is turned
clockwise.
The GEQ becomes minimum when the JOG dial is turned
counter-clockwise.
The GEQ comes to center when the  FILE SELECT  button is
pressed.