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PDF Contains
Technical Data, Mechanical data, Detailed Circuit diagram with components value, PCB layout. Actual PCBs Print. Component List, Spare parts code list and Input output detail. It cover LBB1211, LBB1212, LBB1213, LBB1216, LBB1217.
It is the actual Service Manual for SQ10
5
6
7
8
N
IC751 (Pin 8)
Check the following points when the source is Multi ch. IC751 (Pin 27) Is there abnormality at the parts and patterns in the path?
Check the following points when the source is Multi ch. LSCD Is there abnormality at the parts and patterns in the path?
A
Is there No a audio data (with Sch source)? Yes IC701 (Pin 27) (CDT)
No
Is there No a audio data (with Cch source)? Yes IC401 (Pin 10)
No Replace IC751 or IC401.
Replace IC701 or IC751.
Is there No a audio data (with Cch source)? Yes IC751 (Pin 12) Is there No a audio data (with Cch source)? Yes IC701 (Pin 26) (BDT)
Is there abnormality at the parts and patterns in the path?
No
Is there No a audio data (with Cch source)? Yes IC751 (Pin 26) LSBD
Is there abnormality at the parts and patterns in the path?
No Replace IC751 or IC401.
B
Replace IC701 or IC751.
Is there abnormality at the parts and patterns in the path?
No
Is there No a audio data (with SBch source)? Yes IC401 (Pin 11)
Is there abnormality at the parts and patterns in the path?
No Replace IC751 or IC401.
C
Replace IC701 or IC751.
Is there No a audio data (with SBch source)? Yes IC751 (Pin 15) Is there No a audio data (with SBch source)? Yes IC751 (Pin 28) LSSD
Is there abnormality at the parts and patterns in the path?
No
Is there No a audio data (with SBch source)? Yes
Is there abnormality at the parts and patterns in the path?
No Replace IC751 or IC401.
Replace IC701 or IC751.
IC401 (Pins 22,21) SLO, SRO Is there abnormality at the parts and patterns in the path?
No
Is there a analog audio output (with Sch source)? Yes
No
Check the parts and patterns (short-circuit) in the path including the DSP assy and others. No Replace IC401.
D
Replace IC701 or IC751.
IC401 (Pins 20,19) CO, SWO Is there abnormality at the parts and patterns in the path?
Is there No a audio data (with Sch source)? Yes IC401 (Pin 9) Is there No a audio data (with Sch source)? Yes
No
Is there a analog audio output (with Cch source)? Yes
No
Check the parts and patterns (short-circuit) in the path including the DSP assy and others. No Replace IC401.
E
Replace IC751 or IC401.
IC401 (Pins 18,17) SBLO, SBRO Is there abnormality at the parts and patterns in the path?
No
Is there a analog audio output (with SBch source)? Yes
No
Check the parts and patterns (short-circuit) in the path including the DSP assy and others. No Replace IC401.
Replace IC751 or IC401.
O
F
VSX-LX50
5 6 7 8
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