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Chassis: RB2G, HM
Chassis: RB2G, HM
41
BAX-L board Side A
P
in 5)
E
_
M
U
T
E
_
S
P
H
L
O
(
P
INR+
(Pin1)
X
_
AUDIO_
MUT
E
Vss
(Pin
6)
CN
(Pin
7)
4
502
C4501
CL
4
IC4501
01
P
(Pin
8)
D
(Pin
9)
(Pin14)
CL45
C
P
V
D
D
INL+
(
BAX-L BOARD (Side A)
Chassis: RB2G, HM
Chassis: RB2G, HM
42
BAX-L board Side A
P
in 5)
E
_
M
U
T
E
_
S
P
H
L
O
(
P
INR+
(Pin1)
X
_
AUDIO_
MUT
E
Vss
(Pin
6)
CN
(Pin
7)
4
502
C4501
CL
4
IC4501
01
P
(Pin
8)
D
(Pin
9)
(Pin14)
CL45
C
P
V
D
D
INL+
(
BAX-L BOARD (Side A)
Chassis: RB2G, HM
Chassis: RB2G, HM
43
Troubleshooting
2-3 No Sound
2-3-3. Main Board Power On Checking (for Main SP Lch & Rch) for BAX-L (HEL,HEH,HM) board only
No
Checking Item
OK
NG
If
NG
If
NG
2 3. No Sound
1
Check
IC4601 side-terminal of
L4601,L4602,
L4603,L4604
IC4601 side-terminal of
L4601,L4602,
L4603,L4604
Switching Freq = 384kHz or
768KHz ±20KHz
Vrms = don’t care
768KHz ±20KHz
Vrms = don’t care
No switching
frequency at
either one of
the CL
frequency at
either one of
the CL
Go to next checking.
2
Check F4601 MainSP
(for BAX-L only)
(for BAX-L only)
V(before fuse) = 12.5V ± 0.5V
V(after fuse) = 12.5V ± 0.5 V
V(after fuse) = 12.5V ± 0.5 V
No voltage.
Check fuse broken?
Check CN9101 Pin 8
&10
Check CN9101 Pin 8
&10
t 12 5V?
Change fuse (5A).
Check power supply
b
Check power supply
b
d
di VCC
&10 got 12.5V?
board audio VCC.
3
Check F4601 MainSP
V(before fuse) = 19 5V ± 0 5V
No voltage
Change fuse (5A)
3
Check F4601 MainSP
(BAX-L board only)
(BAX-L board only)
V(before fuse) = 19.5V ± 0.5V
V(after fuse) = 19.5V ± 0.5V
V(after fuse) = 19.5V ± 0.5V
No voltage.
Change fuse (5A).
Check power supply
board audio VCC.
Check power supply
board audio VCC.
4
Check IC4601 (Pin
8) and C4601 (Pin 27)
(for BAX-L board only)
8) and C4601 (Pin 27)
(for BAX-L board only)
V(before fuse) = 3.3V ± 0.5V
V(after fuse) = 3.3V ± 0.5V
V(after fuse) = 3.3V ± 0.5V
No voltage.
Check +3.3V_MAIN
supply.
supply.
2.3-2 - No Sound: Main Board Power On Checking (For Main Speaker L&R) for BAX-L (HE-L, HE-H, HM) Board Only
Chassis: RB2G, HM
Chassis: RB2G, HM
44
Troubleshooting
2-3 No Sound
2-3-4. Main Board Power On Checking (for Main SP Lch & Rch) for BAX-L (HEL,HEH,HM) board only
No
Checking Item
OK
NG
If
NG
If
NG
2-3. No Sound
5
Check CL4605,
CL4606, CL4607
CL4606, CL4607
Vdc = 3.3V ± 0.3V
Vdc < 0.8V
CL4606 NG,
Check IC4601
Check IC4601
CL4605,4607 NG,
Check IC9000
Check IC9000
6
Check CL4601,
CL4602, CL4603,
CL4604
CL4602, CL4603,
CL4604
CL4601 = 12.288MHz
CL4603 = 3.072MHz
CL4604 = 48KHz
CL4602 = moving CLK
CL4603 = 3.072MHz
CL4604 = 48KHz
CL4602 = moving CLK
If no frequency at CL4601,
CL4603, CL4604, Ayu2 IC
(IC9000) NG.
If no frequency at CL4602,
CL4603, CL4604, Ayu2 IC
(IC9000) NG.
If no frequency at CL4602,
If sound source OK,
but CL4602 = NG,
Ayu2 IC (IC9000) NG.
but CL4602 = NG,
Ayu2 IC (IC9000) NG.
All Vp-p
≈ 3.3V
make sure sound source
OK.
OK.
Note:
(AYU2/
(AYU2/
Ayu2L
) – IC9000
(
y
)
(Brownie)- IC9001
Troubleshooting
2-3 No Sound
2-3-4. Main Board Power On Checking (for Main SP Lch & Rch) for BAX-L (HEL,HEH,HM) board only
No
Checking Item
OK
NG
If
NG
If
NG
2-3. No Sound
5
Check CL4605,
CL4606, CL4607
CL4606, CL4607
Vdc = 3.3V ± 0.3V
Vdc < 0.8V
CL4606 NG,
Check IC4601
Check IC4601
CL4605,4607 NG,
Check IC9000
Check IC9000
6
Check CL4601,
CL4602, CL4603,
CL4604
CL4602, CL4603,
CL4604
CL4601 = 12.288MHz
CL4603 = 3.072MHz
CL4604 = 48KHz
CL4602 = moving CLK
CL4603 = 3.072MHz
CL4604 = 48KHz
CL4602 = moving CLK
If no frequency at CL4601,
CL4603, CL4604, Ayu2 IC
(IC9000) NG.
If no frequency at CL4602,
CL4603, CL4604, Ayu2 IC
(IC9000) NG.
If no frequency at CL4602,
If sound source OK,
but CL4602 = NG,
Ayu2 IC (IC9000) NG.
but CL4602 = NG,
Ayu2 IC (IC9000) NG.
All Vp-p
≈ 3.3V
make sure sound source
OK.
OK.
Note:
(AYU2/
(AYU2/
Ayu2L
) – IC9000
(
y
)
(Brownie)- IC9001
2.3-3 - No Sound: Main Board Power On Checking (For Main Speaker L&R) For BAX-L (HE-L, HE-H, HM) Board Only
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