Standard Repair Process Detail Technical Manual
Voltage and speaker checking method
when there is no audio
C. Audio error_No audio/Normal video
A14
Established
date
Revised
date
Error
symptom
Content
A14
1. Check the contact condition of harness which connect Power B/D and Main B/D.
2. Measure 20V input voltage for Audio AMP supplied from Power board.
(If there is no input voltage, remove and check the harness)
3. Connect the tester RX1 to the speaker terminal and if you hear the Chik Chik
sound when you touch the GND and output terminal, the speaker is normal.
No Name No Name
1
DRV-ON
2
DPC
3
GND
4
GND
5
20VS
6
20VS
7
12VM
8
12VM
9
GND
10
12VM
11
PWR-ON
12
ACD
13
GND
14
GND
15
GND
16
12VT-ON
17
12VM
18
12VM
19
GND
20
GND
21
20VS
22
20VS
23
NC
24
20VS
No Name No Name
1
SPK_R-_FT
2
SPK_R+_FT
3
SPK_L-_FT
4
SPK_L+_FT
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Only for training and service purposes
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