Pioneer VSX-1127-K Service Manual page 28

1
A
B
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
B
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.
C
Check signals of problem channel on
AMP7 Assy CP401 pins 3 (SL), 5 (C),
7 (SR) ,11 (SBL),13 (SBR) signals.
No
Check signals on BRG Assy CN2107
pins 9 (SR), 11 (SL), 13 (SW),
15 (C), 17 (SBR), 19 (SBL) signals.
No
Check signals on BRG Assy CN2110
pins 5, 7, 9,11,13,15 signals.
(Pin assign is same as CN2107)
No
Input PCM to COAX in or OPT in,
set Auto Surround.
D
Is Front LR SP output sound is OK?
No
Repair IC1801 and its peripheral
circuit or replace the D-MAIN Assy.
E
F
C
28
1
2
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.
Yes
Replace AUDIO Assy or
their peripheral circuit.
Repair IC2742, IC2704, IC2782
Yes
and their peripheral circuit
or replace the BRG Assy.
Yes
Replace the D-MAIN Assy.
VSX-1127-K
2
3
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.
3
4
4