Sony DPS-V77 service manual be activated. r, Subject, Operation and Display

	Subject				Operation and Display
•	Others	5) Other checks
		• Other error messages are displayed in * 1.
		[DRAM1 ERR] or [DRAM2 ERR]
		Automatic inspection of the soldered bridge, etc., of IC601, IC602, IC603 is carried out.
		If this display appears, apply a soldering iron to the terminal of each IC and check the
		application of the solder.
		In case of [DRAM1 ERR], check IC601 and IC602, and in case of [DRAM2 ERR], check
		IC603 and IC604.
		[MIDI PORT ERROR]
		By using a DIN cable to connect the MIDI IN/OUT terminals on the rear panel, the automatic
		inspection of the MIDI terminals is carried out.
		When there is no special requirement to make a connection, this display will appear but it may
		be ignored.
3. Inspection of each function		• If the brackets [	] were fully filled with asterisks" * "in the preceding checks of the switch and
	(No.2)	Jog & Shuttle, press the [ENTER] key. The following display will appear and test mode No.2 will
		be activated. r----------------------------.
		I TEST MODE 2			I
		I			I
		I			I
		:	[LCD]	[LED]	:
		[EDIT]	[A ]	[ B]	[C] [D] [ E] [F] [EXIT]
		1) When pressing the [A] key, check that all LCD dots become black.
•	LCD #1	2) When all the LCD dots have become black, check that the contrast changes when you rotate the
•	LCD #2	Jog & Shuttle dials.
		3) When pressing the [B] key, check that each dot and segment light up between the 8 segments,
• LED		meters and LEDs.

4. Completion of the inspection When pressing the [EXIT] key, reactivating is carried out and the test mode is completed.

<Examples when initialization has to be carried out>

1.When reconnecting the power supply and the keys do not have any effect, and when the there are distortions in the display due to unstable operation of the software.

2.When the version of the ROM (IC607) has been changed. (Including change of circuit board.)

3.When the power supply has been changed or removed once.

*Even except for the above, when there are no special instructions from the customer, carry out the initialization operation.

The following notes are included in the "Instruction Manual". (See step 3.)

[Notes on being requested to carry out repair]

When requesting a repair, data in the USER memory may be reverted to the original factory data settings.

Be sure to save any important data in an external MIDI data filer, or make written notes of the parameter settings.

* Method of initializing without entering the test mode

• Tum the POWER switch ON while simultaneously keeping the [SAVE] and [ENTER] keys depressed .

• After the title screen has been shown and "Initialized!" is displayed, the initialization is completed. * In this case, the data of the internal clock is not initialized.

*The following shows the initialization method and the content that is actually initialized.

~d	[SAVE] + [ENTER]	Initialization with the test mode
		Memory initialization (YES)	Memory initialization (NO)
Content being initialized
Initialization of the internal system	0	0	0
Initialization of the user memory	0	0	x
Initialization of the clock data *	x	0	0

*As to setting of the clock, please refer to page 24 in the Instruction Manual.

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