Jvc CX JT8 Service Manual

Page 2

CX-JT8

SECTION 4
TEST MODE

[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 the key to turn the power ON.

2. Press three keys of E , and simultaneously.

3. The message RESET is displayed on the fluorescent indicator

tube momentarily, then becomes standby statest

[TUNER STEP CHANGE-OVER]

(Except AEP, UK and CIS models)

- A step ofAM channels can be changed over between 9 kHz and
10 kHz

Procedure:

Press the key to turn the power ON.

Press the key to select AM".

Press the key to turn the power OFF.

Press two keys of and simultaneously.

The message 9K STEP or 10K STEP" is displayed on the

fluorescent indicator tube, and thus the channel step is changed

overt

PNt-

.UF

[CD SHIP MODE]

. This 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:

Press the key to turn the power ON.

Press the key to select CD.

Press two keys of and simultaneously.

The message LOCK is displayed on the fluorescent indicator

tube, and the CD ship mode is set.

IM:-

P

[CHANGE-OVER FUNCTION OF MD/VIDEO]
- This mode is used to enable function of external input to change
over between MD and VIDEO.

Procedure:

1. Set to standby state.

2. Press two keys of and simultaneously.

3. The message MD or VIDEOis displayed on the fluorescent
indicator tube, and the function of external input is changed
Over.

18

[CD TRAY LOCK MODE]

- This mode is used to unable to take sample disc out of tray in

the shop.

Procedure:

1. Press the key to turn the power ON.

2. Press the key to select CD.

3. While pret ng the E key, press the Q key for 5 seconds.

4. The message LOCKED it displayed on the fluorescent
indicator tube and the tray is locked. (Even if pressing
the @ key, the message LOCKED is displayed on the
fluorescent indicator tube and the tray is locked)

5. To release from this mode, while pressing the E key, press
the @ key for 5 seconds.

6. The message UNLOCKED is displayed on the fluorescent
indicator tube and the tray is unlocked.

[AMP TEST MODE]

' This mode is used to set the parameter ofAMP IC for adjustment

of tone quality and VACS level and display VACS status.

Procedure:

1. Press the key to turn the power ON.

2. Press three keys of El , and simultaneously.

3. When the AMP test mode is activated, the message AMP
TEST is displayed on the fluorescent indicator tube
momentarily.

4. Press two keys of and
simultaneously, mode is changed over to parameter setting of
AMP IC and display of VACS status.

5. When the VACS ON, the message V2255255 is displayed on
the fluorescent indicator tube, and when the VACS OFF, the
message 2255255 is displayed on the fluorescent indicator
tube.

6. Press the key, DBFB ON/OFF is Changed over.

7. Pr the key, surround ON/OFF is changed over.

8. Press the key, EQ band is changed over to LOW,
MID or HIGH.

9. Press the and key, EQ curve adjustment
value is changed over between 78dB to +8dBt

10. To release from this mode, press two keys of and
simultaneously.