Sony MDS-SD1 service manual Retry Cause Display Mode, Higher Bits Lower Bits Hexa, Binary

RETRY CAUSE DISPLAY MODE

•In this test mode, the causes for retry of the unit during recording can be displayed on the fluorescent indicator tube. During playback, the “track mode” for obtaining track information will be set.

This is useful for locating the faulty part of the unit.

•The following will be displayed :

During recording and stop : Retry cause, number of retries, and number of retry errors.

During playback: Information such as type of disc played, part played, copyright.

These are displayed in hexadecimal.

Precedure:

1.Load a recordable disc whose contents can be erased into the unit.

2.Press the MENU/NO button. When “Edit/Menu” is displayed on the fluorescent indicator tube, rotate the – ˜+ knob to display “All Erase?”.

3.Press the ENTER/YES button.

4.When “All Erase??” is displayed on the fluorescent indicator tube.

5.

Press the

ENTER/YES

button to display “Complete!!”, and press the

π

button immediately. Wait for about 15 seconds while pressing

the button.

6.

When the “TOC” displayed on the fluorescent indicator tube goes off, release the

π

button.

7.

Press the

rREC

button to start recording. Then press the

fl

button and start recording.

8.

To check the “track mode”, press the

fl

button to start play.

9.To exit the test mode, press the 1/u button, and turn OFF the power. When “TOC” disappears, disconnect the power plug from the outlet. If the test mode cannot be exited, refer to “Forced Reset” on page 8.

Fig. 1 Reading the Test Mode Display (During recording and stop)

Fig. 2 Reading the Test Mode Display (During playback)

	RTs@@c##c**											@@####**$$
Fluorescent display tube				display							Fluorescent display tube			display
@@ : Cause of retry											@@ : Parts No. (name of area named on TOC)
## : Number of retries											##		: Cluster
** : Number of retry errors											**		: Sector } Address (Physical address on disc)
											$$		: Track mode (Track information such as copyright
													information of each part)
Reading the Retry Cause Display
		Higher Bits				Lower Bits				Hexa-
Hexadecimal		8	4	2	1	8	4	2	1		Cause of Retry			Occurring conditions
										decimal
	Bit	b7	b6	b5	b4	b3	b2	b1	b0
Binary		0	0	0	0	0	0	0	1	01	shock		When track jump (shock) is detected
		0	0	0	0	0	0	1	0	02	ader5		When ADER was counted more than five times
													continuously
		0	0	0	0	0	1	0	0	04	Discontinuous address		When ADIP address is not continuous
		0	0	0	0	1	0	0	0	08	DIN unlock		When DIN unlock is detected
		0	0	0	1	0	0	0	0	10	FCS incorrect		When not in focus
		0	0	1	0	0	0	0	0	20	IVR rec error		When ABCD signal level exceeds the specified range
		0	1	0	0	0	0	0	0	40	CLV unlock		When CLV is unlocked
		1	0	0	0	0	0	0	0	80	Access fault		When access operation is not performed normally

Reading the Display:

Convert the hexadecimal display into binary display. If more than two causes, they will be added.

Example

When 42 is displayed:

Higher bit : 4 = 0100 nb6

Lower bit : 2 = 0010 nb1

In this case, the retry cause is combined of “CLV unlock” and “ader5”.

When A2 is displayed:

Higher bit : A = 1010 nb7+b5

Lower bit : 2 = 0010 nb2

The retry cause in this case is combined of “access fault”, “IVR rec error”, and “ader5”.

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