DHC-EX880MD, DHC-MD717, ST-EX880, ST-MS717 - Sony Audio Service Manual (repair manual)

MICROFILM

AEP Model

UK Model

ST-EX880

E Model

Tourist Model

ST-MS717

ST-EX880/MS717 are the tuner section
in DHC-EX880MD/MD717.

Photo: ST-MS717

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5-1. Note for Printed Wiring Boards and

Scehmatic Diagrams ....................................................... 7

5-2. Printed Wiring Board – MAIN Section –

(ST-EX880) ..................................................................... 9

5-3. Printed Wiring Board – MAIN Section –

(ST-MS717) ..................................................................... 11

5-4. Schematic Diagram – MAIN Section (1/2) – ................. 13
5-5. Schematic Diagram – MAIN Section (2/2) – ................. 15
5-6. Printed Wiring Board – PANEL Section – ..................... 17
5-7. Schematic Diagram – PANEL Section – ........................ 19
5-8. Schematic Diagram – RDS Section – (ST-EX880) ........ 21
5-9. Printed Wiring Board – RDS Section – (ST-EX880) ..... 21
5-10. Schematic Diagram – POWER Section – ...................... 22
5-11. Printed Wiring Boards – POWER Section – .................. 23
5-12. IC Pin Function Description ........................................... 25

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!

!

1. Press 

[POWER]

 button.

2. Press two buttons 

[POWER]

 and 

[SLEEP]

 simultaneously.

3. LEDs are all turned on, the fluorescent indicator tube displays

“KEY/FL/LED”, and the check mode is set.
1 All LED indicators light on mode

↓

2 All Fluorescent indicator tube light on mode

↓

3 ST segment mode

↓

4 RDS segment mode

↓

5 Encoder and key check mode

1)

All LED light on mode is kept, when buttons which is pressed to
enter all LED light on mode, release same time.
When release them separate timing, it is moved to next All Fluores-
cent indicator tube light on mode.

2)

After all LED light on mode, light on point remove one by one, when
any button pressed or 

[MULTI CONTROLLER]

 knob turned.

3)

Under KEY check mode, every time buttons pressed numerical value
of “KEY=” in FL tube increase.
And that time, numerical value of “ECDR=” increase when

[MULTI CONTROLLER]

 button turn to + direction, and it decrease

turn to – direction.

To exit from this mode, disconnect the power cord.

1. Press 

[POWER]

 button.

2. Press two buttons 

[POWER]

 and 

[ENTER/YES]

 simultaneously,

and the tuner check mode is set.

3. System power on, set up the tuner function, and test condition

inactive.
Press two buttons 

[POWER]

 and 

[ENTER/YES]

 simultaneously

to exit, and system power off.

The cold reset clears each unit microcomputer memory to initial
conditions.
1. Press 

[POWER]

 button to turn the set OFF.

2. Press three buttons 

[MENU/NO]

, 

[PRESET]

, and 

[POWER]

simultaneously.

3. A message “COLD SET OK” is displayed on the fluorescent

indicator tube two seconds.

4. Press 

[POWER]

 button to turn the set OFF.

5. Remove power cord after the clock is displayed on the fluo-

rescent indicator tube.

6. Connect power cord, press 

[POWER]

 button to turn the set

ON, and the set is reset.

4-995-091-1

π

: Hong Kong, Singapore, Malaysia

4-995-091-2

π

: AEP, UK

4-995-091-3

π

: Tourist

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This section is extracted from
instruction manual.

1 

I/

u (POWER) button

2 REMOTE CONTROL receiver
3 ONCE, DAILY, REC, SLEEP indicator
4 REC button
5 DAILY button
6 ONCE button
7 CLOCK/TIMER SET button
8 STEREO/MONO button
9 SLEEP button
!º MULTI CONTROLLER knob
!¡ ENTER/YES button
!™ MENU/NO button
!£ BAND button
!¢ RESET button
!∞ Fluorescent indicator tube
!§ AUTO/n button
!¶ MANUAL/N button
!• DISPLAY button

!ª TUNER OUT terminal
@º FM/AM ANTENNA terminal
@¡ AU BUS terminal
@™ SYSTEM CONTROL terminal
@£ AC OUTLET (for TA-MS717)
@¢ POWER cord

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