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5
3. BASIC ITEMS FOR SERVICE
3.1 CHECK POINTS AFTER SERVICING
To keep the product quality after servicing, please confirm following check points.
N
. o
1
2 FM/AM tuner
3
See the table below for the items to be checked regarding audio:
3.2 PCB LOCATIONS
C
BT Unit
350BT/XMEW5
355BT/XMES
B
Keyboard Unit
5
6
P
o r
c
e
d
u
e r
s
Confirm whether the customer complain has
been solved.
If the customer complain occurs with the
specific media, use it for the operation check.
Check FM/AM tuner action.
(Seek, Preset)
Switch band to check both FM and AM.
A
p
p
e
a
a r
n
c
e
c
h
e
k c
Item to be checked regarding audio
Distortion
Noise
Volume too low
Volume too high
Volume fluctuating
Sound interrupted
A:MVH-350BT/XMEW5
B:MVH-355BT/XMES
C:MVH-150UI/XMEW5
D:MVH-155UI/XMES
E:MVH-155UI/XMES1
F:MVH-159UI/XMID
Unit Number
:
Unit Number
:
Unit Number
:
Unit Number
:
Unit Number
:
Unit Name
:
Unit Number
:
Unit Name
:
Unit Number
:
Unit Name
:
MVH-350BT/XMEW5
6
7
I
e t
m
o t
b
e
c
o
n
r i f
m
The customer complain must not be
reappeared.
Display, audio and operations must be
normal.
Display, audio and operations must be
normal.
N
o
c s
a r
c t
h
e
s
r o
d
receiving it for service.
A
Tuner Amp Unit
QWM3482(A)
QWM3483(B)
QWM3477(C)
QWM3478(D,E)
QWM3479(F)
Tuner Amp Unit
Keyboard Unit
QWM3533(A,B)
BT Unit
7
8
e
d
t r i
o
n
s t i
a
p
p
e
a
a r
n
c
e
a
t f
r e
8
A
B
C
D
E
F
9
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