Sony MZ-R37 Section SELF-DIAGNOSTIC, Operation in Test Mode Setting, Releasing the Test Mode

SECTION 2

SELF-DIAGNOSTIC

2-1. GENERAL

This set uses the self-diagnostic system in which if an error occurs in playback/recording mode, the error is detected by the model control and power control blocks of the microprocessor and infor- mation on the cause is stored as history in EEPROM.

By viewing this history in test mode, it helps you to analyze a fault and determine its location.

2-2. TEST MODE SETTING

There are two different methods to set the test mode:

1Short BP801 (TEST) on the main board with a solder bridge (connect pin @¤ of IC801 to the ground). Then, turn on the

power.

MAIN BOARD (SIDE B)

		X801
IC801
25	26	C401
		BP801
		(TEST)
		IC301

2In the normal mode, use the keys on the unit to perform the following operations:

Press and hold down ( and press the keys below in this turn:

+ n+ n=n= n+ n= n+ n = nP nP

2-3. OPERATION IN TEST MODE SETTING

When the test mode is set, the LCD shows repeated cycles of the following display:

2) Remote controller LCD

888 õ

All ON

All OFF

Vr. 1.ââ

Microprocessor version display

•Holding down P allows the current display to be maintained while it being depressed.

2-4. RELEASING THE TEST MODE

For test mode set with the method 1:

Turn off the power and open the solder bridge on BP801 on the main board.

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

2-5. SELF-DIAGNOSTIC MODE

1.Go into the test mode.

2.With the unit LCD indicators all flashing, press DISPLAY key to go into the self-diagnostic mode.

1st0 00

Error indication code

History code

1) Unit LCD

3.Then, each time ) key is pressed, the reference information display changes as given below.

õ

188:88 pppppp

Vr. 1.00

All ON

All OFF

Microprocessor version display

1st â XX

1st 1 ââ

1st 2 ââ

N â XX

N 1 ââ

N 2 ââ

N-1 â XX

N-1 1 ââ

N-1 2 ââ

N-2 â XX

N-2 1 ââ

N-2 2 ââ

RXXXX

1st â XX (return)

• Press = key to go back to the previous display.

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