DVP-NC615, DVP-NC655P, HT-5500D - Sony Audio Service Manual (repair manual). Page 90

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2-3. Each Self Check Function
Each Self Check function tests the FLD display, LED display, and
key input.

2-3-1. FLD and LED All ON
2-3-1-1.Transition Keys in Self Check Mode
• [STOP] key and [OPEN/CLOSE] key on the main unit
• [LEFT] key on the main unit and the remote commander

2-3-1-2. Operation and Display
In this mode, all LEDs except STANDBY LED and all segments
of FLD turn ON.
Example of FLD all ON

Input

IC404: Pin No. (Signal)

Voltage [V]

Pin ea

 (AD1)

Pin es

 (AD2)

Pin ef

 (AD4)

Pin eg 

(AD5)

Pin eh 

(AD6)

Pin ej 

(AD7)

0 – 0.2

ENTER

TOP MENU *

PLAY

OPEN/CLOSE

POWER

LOAD

0.6 – 0.82

DOWN

MENU *

PAUSE

EXCHANGE

DISC 5

1/ALL *

1.16 – 1.47

LEFT

RETURN *

PREV

DISC SKIP

DISC 4

PREQ

1.8 – 2.12

UP

DISPLAY *

NEXT

–

DISC 3

TVS

2.48 – 2.7

RIGHT

–

–

–

DISC 2

DISC 1

5.0

–

–

–

–

–

–

2-3-2. Main Unit Key Name Display and Key Code Display
2-3-2-1. Transition Keys in Self Check Mode
• Keys on main unit except keys transited in self check

2-3-2-2. Operation and Display
When a key on the main unit is pressed in the Self Check mode,
the name of that key is displayed on the FLD. Also, the key name
display and the key code display can be switched with the
[DISPLAY] key on the remote commander. “NOTHING” is dis-
played when nothing is entered. Also, VCD, DVD, and CD seg-
ments turn on when a communication error occurred.

FLD display (at input of [PLAY] key on the main unit)

* : NC655P only