DVP-NC675P, HT-4800DP, HT-5800DP, HT-6800DP - Sony Audio Service Manual (repair manual). Page 73

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6-6
2-3.
Each Self Check Function
Each Self Check function tests the FLD display, and key input.
2-3-1. FLD All ON
2-3-1-1. Transition Keys in Self Check Mode
•   Z  key and x key on the main unit
•  
 T  key on the remote commander
2-3-1-2. Operation and display
In this mode, all segments of FLD turn ON.
• Example of FLD all ON
2-3-2. Main Unit Key Code
Display
2-3-2-1. Transition Keys in Self Check Mode
• Keys on the main unit except keys transited in Self Check
Mode
2-3-2-2. Operation and Display
When a key on the main unit is pressed in the Self Check mode,
key code is displayed on the FLD.
• Key code display
(at input of
  H  key, key code: 0Ah)
• At input of faulty voltage
1 2 3 4 5
DVD
VCD
MP3
ALL DISCS
1 2
3 4 5
DVD
VCD
MP3
ALL DISCS
1 2 3 4 5
DVD
VCD
MP3
ALL DISCS
Input
Voltage [V]
IC404: Pin No. (Signal)
PIN  ef (AD1)
PIN eg (AD2)
PIN eh (AD3) PIN ej (AD4)
0 - 0.20
PLAY
OPEN/CLOSE
STOP
POWER
0.60 - 0.82
PAUSE
EXCHANGE
DISC 4
-
1.16 - 1.47
PREVIOUS
DISC SKIP
DISC 3
-
1.80 - 2.12
NEXT
-
DISC 2
-
2.48 - 2.70
DISC 5
-
DISC 1
-
Vref = 3.3V
Page of 98
Display

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