HCD-GX450, MHC-GX450 - Sony Audio Service Manual (repair manual). Page 18

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• 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  PLAY MODE/TUNING MODE  and ?/1 buttons si-

multaneously, 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.

• 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  ,  PLAY MODE/TUNING MODE  ,

and DISC 1 simultaneously.

2. The fluorescent indicator tube displays “COLD RESET” and

the set is reset.

This mode can be used for operation check of CD section and tape
deck section.
• If an error occurred:

The aging operation stops and is displayed status.

• If no error occurs:

The aging operation continues repeatedly.

1.

Operating method of Aging Mode

Press ?/1 button to turn the set ON and select “CD” of the function.
1) Set three discs in tray.  Press the PLAY MODE/TUNING MODE

button to set the “ALL DISCS” mode, and the PRESET EQ
button to “REPEAT” off.

2) Load the tapes recording use into both decks.
3) Press three buttons x ,  PLAY MODE/TUNING MODE  ,

and  EX-CHANGE  simultaneously.

4) Aging operations of CD and tape are started at the same time.
5) To exit the aging mode, perform [Cold Reset].

2.

Aging mode in CD section

1) Operation during aging mode
• In the agining mode ,the program is excuted in the following

sequence.

(1) The disc tray opens and closes.
(2) The disc tray turns to select a disc 3.
(3) The pick-up accesses to the first track, and plays 3 seconds.
(4) The pick-up accesses to the last track, and plays 3 seconds.
(5) The disc tray opens and closes.
(6) The disc tray turns to select a disc 1.
(7) The same operation starts like step (3).
(8) After a disc 1 aging operation, a disc 2 is selected.
(9) When an aging operation of a disc 3 is completed, the display

“AGING 

∗∗∗∗

” value increases.

(10) If no error occurs, the aging operation continues repeatedly.

2) Error display

Step

1

2

3

4

5

6

7

8

9

10

11

12

Operation

Rewind the TAPE A

Rewind the TAPE B

Play the TAPE A (1 minute)

Stop the TAPE A (1 second)

Play the TAPE A (3 minutes)

Rewind(AMS) the TAPE A

F.F.(AMS) the TAPE A

Play the TAPE B (1 minute)

Stop the TAPE B (1 second)

Record the TAPE B (3 minutes)

Rewind(AMS) the TAPE B

F.F.(AMS) the TAPE B

Display

TAPE

AAG-1

TAPE

BAG-2

TAPE

AAG-2

TAPE

AAG-3

TAPE

AAG-4

TAPE

AAG-5

TAPE

AAG-6

TAPE

BAG-2

TAPE

BAG-3

TAPE

BAG-4

TAPE

BAG-5

TAPE

BAG-6

Disc error

Display

Error

E00D01022

Focus error (No disc)

E00D02022

Sub Q error (Focus is good)

E00D02023

TOC reading error

E00D02014

Access error (Unable within regular time)

Mechanism error

Display

Error

E00M__E_0

Error during opening tray

E00M__C_2

EX-CHANGE disc error

E00M__D_0

Error during closing tray

E00M__F_3

EX-OPEN error

E00M__D_5

EX-CLOSE error

E00M__C_2

Chuck-up error

E00M__C_3

Unchucking error

3.

Aging mode in Tape Deck section

1) Operation during aging mode
• In the agining mode, the program is excuted in the following

sequence.

2) Error display
• If error occurred, the display remains like “TAPE BAG-2”.

4.

Exiting from the aging mode

• Be sure to perform Cold Reset to exit from the aging mode.