DOWNLOAD Sony HCD-RG30 / MHC-DX20 / MHC-RG30 Service Manual ↓ Size: 5.81 MB | Pages: 59 in PDF or view online for FREE

11

4

Three screws (+BVTT 3

 

×

 6)

6

Two screws (+BVTT 3

 

×

 6)

7

Heat sink

3

Two screws (+BVTP 3

 

×

 16)

1

Two screws (+BVTT 3

 

×

 6)

2

Main board

5

Power amp board

Main board

Base unit

qa

9

Two screws (+PTPWH M2.6)

1

Screw (+PTPWH M2.6)

q;

Screw (DIA. 12)

7

Two screws (+BVTP 2.6

 

×

 8)

6

BD board

qs

Two insulators

2

Holder (BU) assy

qs

Two insulators

8

Two stoppers (BU)

3

Wire (flat type) 19p (CN101)

4

Wire (flat type) 16p (CN102)

5

Screw (+BVTP 2.6

 

×

 8)

12

9

 Pull-out the disc tray.

4

Two

 screws (+BVTP 2.6 

×

 8)

q;

Screw (+PTPWH 2.6

 

×

 8)

qa

Tray

1

Screw (+BVTP 2.6

 

×

 8)

qs

Screw (+BVTP 2.6

 

×

 8)

6

Wire (flat type) 8p (CN721)

3

Wire (flat type)

      8p (CN702)

8

Motor board

qd

Address sensor board

2

Driver board

5

Remove the two solderings of motor.

7

Connector 4p (CN722)

13

[MC Cold Reset]
• 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.

Procedure:
1. Press three buttons x  ,  ENTER , and ?/1 simultaneously.
2. The fluorescent indicator tube displays “COLD RESET” and

the set is reset.

[CD Ship Mode]
• This mode moves the pickup to the position durable to vibra-

tion. Use this mode when returning the set to the customer after
repair.

Procedure:
1. Press

1/u  button to turn the set ON.

2. Press  CD  button and

1/u button simultaneously  until

“STANDBY” appears.

3. When you releaset he buttons, a message “LOCK” is displayed

on the fluorescent indicator tube, and the CD ship mode is set.

[MC Hot Reset]
• This mode resets the set with the preset data kept stored in the

memory.  The hot reset mode functions same as if the power
cord is plugged in and out.

Procedure:
1. Press three buttons x ,  ENTER , and  DISPLAY simultaneously.
2. The fluorescent indicator tube becomes blank instantaneously,

and the set is reset.

[CD Service Mode]
• This mode can run the CD sled motor freely. Use this mode, for

instance, when cleaning the pickup.

Procedure:
1. Press ?/1 button to turn the set ON.
2. Select the function “CD”.
3. Press three buttons x ,  ENTER , and  OPEN/CLOSE  simul-

taneously.

4. The CD service mode is selected.
5. With the CD in stop status, continue to press  >  to move the

pickup to outside track, continue to press  .   to inside track.

6. To exit from this mode, perform as follows:

1) Move the pickup to the most inside track.
2) Press three buttons in the same manner as step 2.

Note: • Always move the pickup to most inside track when exiting from

this mode.  Otherwise, a disc will not be unloaded.

• Do not run the sled motor excessively, otherwise the gear can be

chipped.

[Change-over of AM Tuner Step between 9 kHz and
10 kHz]
• A step of AM channels can be changed over between 9 kHz and

10 kHz.

Procedure:
1. Press ?/1 button to turn the set ON.
2. Select the function “TUNER”, and press  TUNER/BAND

button to select the BAND “AM”.

3. Press ?/1 button to turn the set OFF.
4. Press  ENTER  and ?/1 buttons simultaneously, and the display

of  fluorescent indicator tube changes to “AM 9 k STEP” or
“AM 10 k STEP”, and thus the channel step is changed over.

[GC Test  Mode]
• This mode is used to check the software version, FL tube, LED,

keyboard, headphone and volume.

Procedure:
1. Press three buttons x ,  ENTER  and  DISC 2  simultaneously.
2. LEDs and fluorescent indicator tube are all turned on.
3. When  ENTER  and  DISC2  are pressed at the same time, the

key number check mode starts up. In this mode, the key numbers
of each key series are displayed.

4. In the key check mode, the fluorescent indicator tube displays

“KEY 

000”.  Each time a button is pressed.

5. When  ENTER  and  DISC2  are pressed at the same time, the

key count check mode starts up. In this mode, the message “KEY
CNT @@” is displayed on the FL display tube. When each
button is pressed, the key row number is incremented first. Then
the key value is then incremented. However, one the button is
pressed, the key value cannot be counted.

6. When  ENTER  and  DISC2  are pressed at the same time, the

headphones check mode starts up. In this mode, the message
“H_P ON” is displayed when the headphones are inserted. When
the headphones are not inserted. the message “H_P OFF” is
displayed.

7. When  ENTER  and  DISC2  are pressed at the same time, the

volume check mode starts up. In this mode, the message
“VOLUME FLAT” is displayed on the FL display tube. When
the volume control knob is rotated in the positive (+) direction,
the message “VOLUME UP” is displayed. When the volume
control knob is rotated in the negative (-) direction, the message
“VOLUME DOWN” is displayed.

8. In order to quit the mode, either press  ENTER  and  DISC2  at

the same time or press the three buttons at the same time as in
step 1.

9. To exit from this mode, press three buttons in the same manner

as step 1, or disconnect the power cord.

14

[MC Test  Mode]
• This mode is used to check operations of the respective sections

of Amplifier, TUNER, CD and Tape.

Procedure:
1.

Press the  ?/1  button to turn on the set.

2.

Press the three buttons of x , ENTER and DISC 3
simultaneously.

3.

A message “TEST MODE” appears on the FL display tube.
• The messages VACS1 to VACS5 are displayed when the VACS

is changed in this mode.

• The number of repeats of TAPE and CD is set to the infinite

number as the default setting.

4

 When  v (CURSOR UP)  button is pressed, GEQ increases to
its maximum and a message “GEQ MAX” appears.

5.

When  V (CURSOR DOWN)  button is pressed, GEQ decreases
to its minimum and a message “GEQ MIN” appears.

6.

When  b (CURSOR LEFT)  or  B (CURSOR RIGHT)  button
is pressed, GEQ is set to flat and a message “GEQ FLAT”
appears.

7.

In the test mode, the default-preset channel is called even when
the TUNER is selected and an attempt is made to call the preset
channel that has been stored in memory, by operating the Shuttle
knob.  (It means that the memory is cleared.)

8.

When a tape is inserted in the Deck B and the TAPE B function
is selected, and when the  REC PAUSE/START  button is
pressed twice, recording starts.
The VIDEO function is selected automatically as the input
source.

9.

Select the desired loop by pressing the PLAY MODE button
in the TAPE B function. Insert a test tape AMS-110A or AMS-
RO to Deck A.

10. Press the  SPECTRUM  button to enter the AMS test mode.
11. After a tape is rewound first, the FF AMS is checked, and the

mechanism is shut off after detecting the AMS signal twice.

12. Then the REW AMS is checked and the mechanism is shut off

after detecting the AMS signal twice.

13. When the check is complete, a message of either OK or NG

appears.

14. When the two buttons of  SPECTRUM  and  DISC1  are pressed

at the same time in any function modes, either the “VACS ON”
display to enable the VACS function or the “VACS OFF” display
to disable the VACS function can be selected.

15. When you want to exit this mode, press the  ?/1  button twice.

The cold reset is enforced at the same time.

[Microprocessor version display]
• If the following operation is performed during the POWER OFF

in the modes other than the POWER SAVE mode (i.e., while the
Demo display shows the watch time),
1. When three buttons of  STOP ,  ENTER , V (CUSOR DOWN)

are pressed at the same time, the MC and the GC microprocessor
version numbers are displayed as “M1.00 G1.00”.

2. When three buttons of  STOP ,  ENTER , v (CUSOR UP) are

pressed at the same time, the model name and destination are
displayed as “BG1 AS1A3”.