HCD-GRX90AV, HCD-RXD10AV, MHC-GRX90AV - Sony Audio Service Manual (repair manual). Page 12

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• This mode is used for checking the AMS operations of the tape deck.

JIG
7-819-039-12 Alignment tape, AMS-110A

Procedure:
1. Press the  

1/u  button to turn the unit ON.

2. Set the tape (AMS-110A).
3. Press the three buttons  

p  ,  ENTER/NEXT  , and  DISC 3  button simultaneously.

4. “TEST MODE” is displayed on the fluorescent display tube.
5. Press the  FUNCTION  button and switch the function to the deck with the tape (AMS-110A).
6. Press the  CD SYNC  button. “AMS CHECK” is displayed on the fluorescent display tube and the tape is rewound.
7. AMS starts in the normal direction. If the AMS count is 2 at shut down, proceed to step 8.

“NG” is displayed at other times, and the deck stops.

8. AMS starts in the opposite direction. If the AMS count is 2 at shut down again, “OK” is displayed.

“NG” is displayed at other times.

Note: The  

p  button of CD section will become effective and the aging of CD section will stop sometime, if the buttons described in step 3

are not pressed simultaneously. In that case, press  

^  button and operate the CD section.

During the aging mode, both the CD player and tape deck are executed together.
• If an error occurs:
Aging stops, and the error state is displayed on the fluorescent display tube.
• If no error occurs:
Aging is repeated.

Procedure:
1. Press the  

1/u  button to turn the unit ON.

2. Load 10 minute tapes with unbent rec-proof tabs in decks A and B.
3. Set CD on the DISC 1 table.
4. Set the CD mode REPEAT to OFF and PLAY MODE to ALL DISCS.

(Press the  PLAY MODE/DOLBY NR  and  REPEAT/STEREO/MONO  buttons to set these modes.)

5. Press the  FUNCTION  button to switch the function to “CD”.
6. Press the three buttons  

p  ,  ENTER/NEXT  , and  DISC SKIP/EX-CHANGE  button simultaneously.

7. Aging starts.
8. To end aging, press the  

1/u  button to turn the unit OFF.

Aging Sequence:
Aging is performed in the following sequence.

• Tape Deck
1. The tape in deck A is rewound. “TAPE A AG-1” is displayed.
2. The FWD side of deck A is played for two minutes.

“TAPE A AG-2” is displayed.

3. The tape in deck A is fast forwarded. “TAPE A AG-3” is displayed. Fast forward is carried out for 20 seconds or to the tape end.
4. The RVS side of deck A is played for two minutes.

“TAPE A AG-4” is displayed.

5. The tape in deck A is rewound. “TAPE A AG-5” is displayed.
6. The FWD side of deck B is played for two minutes.

“TAPE B AG-2” is displayed.

7. The tape in deck B is fast forwarded. “TAPE B AG-3” is displayed. Fast forward is carried out for 20 seconds or to the tape end.
8. The RVS side of deck B is played for two minutes.

“TAPE B AG-4” is displayed.

9. The tape in deck A is rewound. “TAPE A AG-5” is displayed.
10. Repeated from step 2.

• CD
1. The tray rotates.
2. DISC 1 is chucked.
3. The TOC is read.
4. The first track is played for 2 seconds.
5. The last track is played for 2 seconds.
6. Repeated from step 1.