Sony MDS-PC2 service manual Retry Cause Display Mode, Higher Bits Lower Bits Hexa, Bit 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.For discs with no disc name, set the name display using the remote commander. (The time display is set after some time. Leave as it is if desired.)

3.Press the p button immediately. Wait for about 10 seconds while pressing the button. (The AMS knob can be pressed instead of the YES button for the same results.)

4.The fluorescent display tube displays “RTs@@c##e**”.

5.Press the r button to start recording. Then press the ^ button and start recording.

6.	To check the “track mode”, press the		^	button to start play.
7.	To exit the test mode, press the	1/u	button. 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)

RTs@@c##c**

Fluorescent display tube display

@@: Cause of retry ## : Number of retries

** : Number of retry errors

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

@@####**$$ Fluorescent display tube display

@@ : Parts No. (name of area named on TOC)

##	: Cluster	} Address (Physical address on disc)
**	: Sector

$$ : Track mode (Track information such as copyright infor- mation 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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