Troubleshooting Flowchart - Sony KDS-50A2000 Training Manual

Troubleshooting Flowchart

All Inputs :
Audio 1,2,3 (Composite & S-Video)
Audio 4, 5 (Component Video )
Audio 6, 7 (HDMI)
Audio 8 (PC IN)
ATSC, NTSC Tuners (RF)
Replace
A1-Board
A-1205-146-A (50")
A-1205-145-A (55")
A-1205-144-A (60")
Replace
G-Board
A-1186-654-A
Replace
G-Board
A-1186-654-A
TVP-23
G
NOTE: Reference Chapter 7,
Missing or Distorted Audio
Pages 85 - 86 for detailed flowchart
(Speaker Outputs )
step descriptions
Is Audio
No
Missing or Distorted
on All Inputs ?
Yes
Check
Audio Output
Var/Fix
MISSING OR DISTORTED AUDIO
No
Is Audio
Present?
Yes
Check
Audio 14V Power Supply
Reference Figures 2-5 & 2-6
Test Point Diagram
Is 14V
No
Present?
Yes
Check 11V voltage
Reference Figures 2-5 & 2-6
Test Point Diagram
No Yes
Is 11V
Present?
2006 SXRD-A Missing or Distorted Audio
Troubleshooting Flowchart G
NOTE: Confirm all
connections between
circuit boards before
replacing
FLOWCHART G
FIGURE 7-2
Check
Speaker Resistance at
CN9800 (or across Speakers )
& Connections
8 ohms Repair or
No
& Replace
Connections Speakers
OK? 1-826-475-11
Yes
Replace
A1-Board
A-1205-146-A (50")
A-1205-145-A (55")
NOTE: TV Must Be
A-1205-144-A (60")
Tuner to High -Definition
Program to output
audio at Optical Out
7. Audio Processing System
Check
TV OK
External Devices
and Bad Repair External
Connections
Devices or
Swap Devices and
Connections
connections
Good
Check
Individual
Audio Inputs
Replace
No Audio
Input 2 H3-Board
**ONLY**
A-1166-1581-A
No Audio
Replace
HDMI
B1-Board
Inputs 6 & 7
A-1205-147-A
**ONLY**
No Audio
Replace
NTSC Tuner ,
AND QT-Board
ATSC Tuner ,
A-1206-154-A
**ONLY**
Replace
No Audio
NTSC Signal QT-Board
**ONLY**
A-1206-154-A
Replace
No Audio
QM-Board
ATSC Signal
**ONLY**
A-1205-237-A
Replace
No Audio
A1-Board
Inputs 1, 2, 3, 4, 5,
A-1205-146-A (50")
8, and/or NTSC
A-1205-145-A (55")
**ONLY**
A-1205-144-A (60")
No Audio
Optical Out
**ONLY**
76