Sony MZ-R50 01.00, IC801, Outline, Setting the Test Mode, Operations When Test Mode is Set

SECTION 4 TEST MODE

[Outline]

•The general adjustment mode of this unit performs CD and MO adjustments automatically when set. In this mode, the disc is de- termined if CD or MO and adjustments are automatically per- formed in order. If errors are detected , the faulty locations are displayed. The servo mode performs each adjustment automati- cally.

[Setting the Test Mode]

Short-circuit the soldering bridge of TAP803 (TEST) on the main board (connect Pin @¤ of IC801 to the GND) and turn on the power supply.

[MAIN BOARD] (SIDE B)

C315

26 TAP803 (TEST)

25

[Operations When Test Mode is Set]

When the test mode is set, the LCD will display as follows.

Self-diagnostic display

(displayed while the DISPLAY key is pressed)

		00	Segment section
Ver	01.00		Dot section

ROM version displayed

•The LCD performs the following repeatedly. ROM version displayed /all lit /all off

•The display can be held and checked by pressing P key.

•The self-diagnostic display appears while the DISPLAY key is pressed.

[Structure of Test Mode]

The test mode of this unit consists of the following five modes.

IC801

1

100

TAP803 (Test mode)

Short : Test mode

Open : Normal mode

[Exiting the Test Mode]

Turn off the power supply and open the soldering bridge of TAP803 (TEST) on the main board.

Display when Test Mode is Set

+key

pkey

=key

Servo Mode

Segment Section : 00

Dot Section : SERVO

Audio Mode

Segment Section : 00

Dot Section : AUDIO

Mecha Mode

Segment Section : 00 00

Dot Section : MECHA

Select dial number (blinks)

Power Mode

Segment Section : 00

Dot Section : POWER

General Adjustment Mode

Segment Section : 4000

Dot Section : Assy MODE

VOLUME +key or – key

•In modes other than the general adjustment mode, the last two digits of the mode number will be displayed at the 00 section.

– 25 –