Sony HCD-RG55 Service Manual page 18

HCD-RG55/RG55S
[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 , GAME EQ 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 MUSIC EQ button is pressed, GEQ increases to its
maximum and a message "GEQ MAX" appears.
5. When MUSIC EQ button is pressed, GEQ decreases to its
minimum and a message "GEQ MIN" appears.
6. When EFFECT ON/OFF 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 beeen 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 buttton 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.
18
[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 , GAME EQ , MOVIE EQ are
pressed at the same time, the model name and destination are
displayed as "GYO AS1A3".
2. When three buttons of STOP , GROOVE are pressed at the
same time, the MC and the GC microprocessor version
numbers are displayed as "V01.02:01.12.24".