Pioneer VSX-1128-K Service Manual page 27

5
A
A B
Change to Auto Surround.
Check the BRI-1 Assy CN2107
pins 5, 7 signals.
No
Check the BRI-1 Assy CN2110
pins 17, 19 signals.
No
INPUT?
Analog input
Check the BRI-1 Assy CN2110
pins 1, 3 signals.
No
Check the AUDIO Assy CP12
pins 1, 3 signals.
No
Check and repair analog audio lines
between IC2501 pin 31, 32 and CP12
pins 1, 3 or replace the AUDIO Assy.
Speaker C (S SB SP-B etc) ch
(Front LR is OK)
Check SP System menu is appropriate
and connected speakers are not
selected [No] on SP Setting menu.
Yes
Check Selection of Speaker system
by [SPEAKERS] key on front panel
is correct.
Yes
Check relay operating of problem ch.
(refer to schematic diagram and Relay
Control Check flow for Front ch)
Yes
Select Surround mode to
EX. STEREO in Advanced Surround.
Check signals of problem channel on
AMP7 Assy CP401 pins 3 (SL), 5 (C),
7 (SR) ,11 (SBL),13 (SBR) signals.
No
C D
5
6
Yes
Repair IC2702 and its peripheral
circuit or replace the AUDIO Assy.
Yes
Check the BRI-1 Assy CN2203
pin 16 (+12V), pin 17 (-12V).
No
Check the AUDIO Assy CP17
pin 1 (+12V), pin 5 (- 12V).
No
Digital input
Yes
Is digital signal from OPT
(or COAX) input OK?
No
Repair IC1801 (AK4588VQ) and its
peripheral circuit or
replace the D-MAIN Assy.
Yes
Replace the BRI-1 Assy.
No
Change SP System and SP
Setting to correct setting.
No
Change SP selection to correct
setting by [SPEAKER] key.
SP-B no sound
Input analog signals to analog in
(e.g. CD), SP selection should be
"SP:B ON ", check SBR, SBL channels.
Check and repair AMP circuit of
Yes
problem channels
or replace the AMP7 Assy.
VSX-1128-K
6
7
Yes
Repair IC2782 and its peripheral
circuit or replace the BRI-1 Assy.
Yes
Check +/- 12V line on BRI-1 Assy
or replace the BRI-1 Assy.
Yes
Repair IC1801 and its peripheral
circuit or replace the D-MAIN Assy.
Speaker System Menu
Setup name Output sound
Speaker B SP-B
Normal (SB/FH) Front High or SB
Normal (SB/FW) Front Wide or SB
If Speaker System is "Normal (SB/FH)" or
"Normal (SB/FW) and speaker setting by
SPEAKER key is "SP: SB ON", there is no
sound from FH or FW.
7
8
A
B
C
D
E
F
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8