Test Mode - Sony HCD-TB20 Service Manual

HCD-TB20
[CD Ship Mode]
• T his mode moves the optical pick-up to the position durable to
vibration. Use this mode when returning the set to the customer
after repair.
Procedure:
1. Press ?/1 button to turn the set on.
2. Select the function " C D" .
3. Press CD 1 button and FUNCTION button simultaneously.
4. After the " S TANDBY" display blinks six times, a message
" L OCK" is displayed on the liquid crystal display, and the CD
ship mode is set.
[GC Test Mode]
• T his mode is used to check the software version, LCD, LED
and keyboard.
Procedure:
1. Press ?/1 button to turn the set on.
2. Press three buttons x , ENTER , and CD 2 simultaneously.
3. LEDs and segments of liquid crystal display are all turned on.
4. When you want to enter the software version display mode,
press CD 1 . The model number and destination are displayed.
5. Each time CD 1 is pressed, the display changes starting from
MC version, GC version, CD version, CDD version, CDMA
version, CDMB version, BDA version, BDB version, ST version,
TA version, TM version, TC version and MD version in this
order. By pressing CD3 the date of the software version is
displayed.
6. Press CD 2 button, and the key check mode is activated.
7. In the key check mode, the liquid crystal display displays " K 0
J 0 V 0" . Each time a button is pressed, " K 0" value increases.
However, once a button is pressed, it is no longer taken into
account.
" V 0" value increases like 1, 2, 3 ... if rotating VOL knob in
" + " direction, or it decreases like 0, 9, 8 ... if rotating in
" – " direction.
8. To exit from this mode, press three buttons in the same manner
as step 2, or disconnect the power cord.
[MC Test Mode]
• T his 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 CD 3
simultaneously.
3. " M D" is displayed.
4. Every pressing of EQ EDIT changes the displays in the order
" G EQ MIN" t" G EQ FLAT" t" G EQ MAX"
of
5. When the VOL control knob is turned clockwise even slightly,
the sound volume increases to its maximum and a message
" V OL MAX" appears for two seconds, then the display returns
to the original display.
6. When the VOL control knob is turned counter-clockwise even
slightly, the sound volume decreases to its minimum and a
message " V OL MIN " appears for two seconds, then the display
returns to the original display.
7. Press the FUNCTION button to the TUNER.
8. By pressing the TUNING MODE button, select the preset
tuning.
9. The default-preset channel is selected. (It means that the
memory is cleared.)
10. When a tape is inserted in Deck and recording is started, the
input source function selects MD automatically.
22
SECTION 4

TEST MODE

11. During the recording by tuning m/M knob, the Tape
(Deck) is selected and tape is rewound. Tape stops at around
the record-starting position and playback of the recorded portion
of the tape is started.
12. Press ?/1 button to turn the set off. The cold reset is enforced
at the same time.
[CD Service Mode]
• T his mode can run the CD sled motor freely. Use this mode, for
instance, when cleaning the optical pick-up.
Procedure:
1. Press ?/1 button to turn the set on.
2. Select the function " C D" .
3. Press three buttons x , FUNCTIO , and CD 2 simultaneously.
4. The CD service mode is selected.
5. With the CD in stop status, turn the m/M knob up to move
the optical pick-up to outside track, or turn the m/M knob
counter-up to inside track.
6. To exit from this mode, perform as follows:
1) Move the optical pick-up to the most inside track.
2) Press ?/1 button to turn the set off.
Note: • Always move the optical pick-up to most inside track when exit-
ing from this mode. Otherwise, a disc will not be unloaded.
• Do not run the sled motor excessively, otherwise the gear can be
chipped.
[CD Ship (Memory Clear) Mode]
• Set the CD ship mode and set the default setup when shipped
from the factory at the next AC power on.
Procedure:
1. Press ?/1 button to turn the set on.
2. Select the function " C D " .
3. Press three buttons x , FUNCTION and CD 1 simultaneously.
4. After the " S TANDBY" display blinks six times, a message
" L OCK" is displayed on the liquid crystal display, and the CD
ship mode is set.
[CD Repeat 5 Times Limit Release Mode]
• 5 times limit of repeating CD is released.
Procedure:
1. Press ?/1 button to turn the set on.
2. Press three buttons x , FUNCTION and CD 1Z .
3. The massage " L IMIT OFF " is displayed. 5 times limit of
repeating CD is released.
4. Cold reset is performed at power off.