Sony R501PC service manual 00 6, Section Test Mode

MZ-R501/R501PC

SECTION 4

TEST MODE

4-1. Outline

•This set provides the Overall adjustment mode that allows CD and MO discs to be automatically adjusted when in the test mode. In this overall adjustment mode, the disc is discriminate between CD and MO, and each adjustment is automatically executed in order. If a fault is found, the system displays its location. Also, the manual mode allows each individual adjustment to be auto- matically adjusted.

4-2. Setting Method of Test Mode

There are two different methods to set the test mode:

1Short TAP801 (TEST) on the MAIN board with a solder bridge (connect pin 3 of IC801 to the ground). Then, turn on the

power.

MAIN BOARD (SIDE B)

		AP856			R807
		R805	R806
	C815	TAP801
AP526		(TEST)		AP803
	AP528
		FB801	C808
	C521
AP529		C807		R810
	AP531	C830		R830
AP530
R811		AP802

4-3. Operation in Setting the Test Mode

•When the test mode becomes active, first the display check mode is selected.

•Other mode can be selected from the display check mode.

•When the test mode is set, the LCD repeats the following dis- play.

This set LCD display

All lit	MONO	SYNC	REC	REMAIN
	u	REC	SHUF	F 1

-a88:88

All off

Microcomputer version display

00 6 V1.300

•When the X key is pressed and hold down, the display at that time is held so that display can be checked.

4-4. Releasing the Test Mode

For test mode set with the method 1:

Turn off the power and open the solder bridge on TAP801 (TEST) on the MAIN board.

Note: Remove the solders completely. Remaining could be shorted with the chassis, etc.

For test mode set with the method 2: Turn off the power.

Note: If electrical adjustment (see page 17) has not been finished completely, always start in the test mode. (The set cannot start in normal mode)

2In the normal mode, turn on the [HOLD] switch. While press- ing the [VOL --]key press the following order:

>t > t . t . t > t

. t > t . t X t X

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