HCD-ZTX7, LBT-ZTX7 - Sony Audio Service Manual (repair manual). Page 22

3. Press [EQ BAND/MEMORY] button repeatedly until a message 

“GEQ FLAT” appears on the fl uorescent indicator tube. GEQ 
is set to fl at.

4.  When the [MASTER VOLUME] knob is turned clockwise even 

slightly, the sound volume increases to its maximum and a mes-
sage “VOLUME MAX” appears on the fl uorescent indicator 
tube.

5. When 

the [MASTER VOLUME] knob is turned counter-clock-

wise even slightly, the sound volume decreases to its minimum 
and a message “VOLUME MIN” appears on the fl uorescent 
indicator tube.

* Tape function
1.  Insert a tape in deck. The function is changed to VIDEO auto-

matically when the recording is started by pressing [REC TO 
TAPE] then press [ENTER] button.

2.   During recording, press [m] button will stop the recording 

and the function is changed to TAPE and rewind the tape in 
Deck until the recording start position and playback of the tape 
in Deck is started.

*  To release from MC Test mode
1.  To release from this mode, press [?/1] button.
2.  The cold reset is enforced at the same time.

[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 [x] button, [DELAY] button and [?

/1] button

 simultaneously.
2. The 

fl uorescent indicator tube becomes blank for while, and the 

set is reset.

[VACS ON/OFF]
•  This mode is used to switch ON and OFF the VACS (Variable 

Attenuation Control System).

Procedure:
1. Press [?

/1] button to turn on the system.

2. Press [x] button and [OPTIONS] button simultaneously. The 

message “VACS OFF” or “VACS ON” appears on the fl uorescent 
indicator tube.

[TUNER STEP CHANGE]
•  The step interval of AM channels can be toggled between 9 kHz 

and 10 kHz.

Procedure:
1. Press [?

/1] button to turn on the system.

2.  Press [TUNER/BAND] button to select the “AM”.
3. Press [?

/1] button to turn off the system.

4.  Press [ENTER] button and [?

/1] button simultaneously. The 

system will turn on automatically. The message “AM 9K STEP” 
or “AM 10K STEP” appears on the fl uorescent indicator tube 
and thus the channel step is changed.

[GC TEST MODE]
•  This mode is used to check the fl uorescent indicator tube, LEDs, 

buttons, MASTER VOLUME knob, OPERATION DIAL knob, 
model, destination, software version.

Procedure:
1. Press 

[x] button, [DELAY] button and [DISC 2] button

 simultaneously.
2.  All LEDs and segments in fl uorescent indicator tube are lighted 

up.

 

All LEDs are lighted up in red color except for [

] LED where 

the LED is lighted up in red and blue color.

3.  When you want to enter to the model version and destination 

display mode, press [DISC 1] button. The model information 
appears on the fl uorescent indicator tube. 

4. Each 

time 

[DISC 1] button is pressed, the display changes to 

display software version and date of the software creation. The 
sequence is SC version, GC version, SYS version, CD version, 
CDDM version, CDMA version, CDMB version, BDA version, 
BDB version, ST version, TC version, TA version, TM version, 
MM1 version, MM2 version and MTR version in this order, and 
returns to the model version display.

5. Press 

[DISC 2] button, the key check mode is activated.

6.   In the key check mode, the fl uorescent indicator tube displays 

“K  0  J0  V0”. 

 

Turn the [OPERATIONAL DIAL] clockwise; “J” value increas-
es by one. Turn the [OPERATIONAL DIAL] counterclockwise; 
“J” value decreases by one. Each time a button is pressed, “K” 
value increases. Press other keys on main unit to check whether 
the key is detected. However, once a button has been pressed, it 
is no longer taken into account. 

  

“V” value increases in the manner of 0, 1, 2, 3 ... if [MASTER 
VOLUME] knob is turned clockwise, or it decreases in the man-
ner of 0, 9, 8, 7  ... if [MASTER VOLUME] knob is turned

 counterclockwise.
7.  When [DISC SKIP/EX-CHANGE] button is pressed after all 

LEDs and segments in fl uorescent indicator tube light up, al-
ternate segments in fl uorescent indicator tube and LED would 
light up. If you press [DISC SKIP/EX-CHANGE] button again, 
another half of alternate segments in fl uorescent indicator tube 
and LEDs would light up.  Press [DISC SKIP/EX-CHANGE] 
button would cause all segments in fl uorescent indicator tube 
and LED turns off. Pressing [DISC SKIP/EX-CHANGE] button 
again would cause all LED and segments lights up.

8.  To release from this mode, press three buttons in the same man-

ner as step 1, or disconnect the power cord.

[MC TEST MODE]
•  This mode is used to check operations of the respective sections 

of Amplifi er, Tuner and Tape.

Procedure:
•  To enter MC Test Mode
1. Press 

[x] button,[DELAY] button and [DISC 3] button

 simultaneously.
2.  The CD ring indicators fl ash on the fl uorescent indicator tube. 

The function is changed to VIDEO.

* Check of Amplifi er
1.   Press [EQ BAND/MEMORY] button repeatedly until a message 

“GEQ MAX” appears on the fl uorescent indicator tube. GEQ 
increases to its maximum.

2. Press [EQ BAND/MEMORY] button repeatedly until a message 

“GEQ MIN” appears on the fl uorescent indicator tube. GEQ 
decreases to its minimum.