Sharp 29A-SX1, Service Manual

Page: 20 / 86

20
29A-SX1
29A-SX5
29A-SX8
SX-68JF200
20
NO
.
Chec
k item
Adjusting procedure and conditions
W
a
v
e
fo
rm
and others
H, V
protector
1
Receiv
e E-5CH (monoscope patter
n).
2
Connect the bias bo
x to the cathode side
(R1622 side) of D1604.
3
Set the v
oltage of the bias bo
x at 16V
, and v
e
rify
that the protector does not oper
ate
.
4
Set the v
oltage of the bias bo
x at 24V
, and v
e
rify
that the protector oper
ates
.
PR
O
TECT
OR OPERA
TION CHECK
Correspondence f
o
r shor
t circuit of
smoothening electrolysis of +B line and so on T
o
chec
k the oper
ation of the protector and
so on, tak
e care f
or the breakage
, deter
ior
a-
tion and so on of each element.
Other protectors
1 2
Ref
erence Appro
x.
20
V as ordinar
y
A/V INPUT/OUTPUT CHECK
NO
.
Chec
k item
Adjusting procedure and conditions
W
a
v
e
fo
rm
and others
Video output chec
k
A
udio output
chec
k
1
3
A
V3 automatic
discr
imination
chec
k
1
Receiv
e
TV with R/C
.
2
When the signal is input to the video input ter- minal of A
V3, it is automatically s
witched to A
V3.
3
When the signal is input to the S-video input ter
minal of A
V3, it is automatically s
witched to
A
V3-S
.
* Setting:
A
uto select in the f
eature — ON
Video input chec
k
A
udio input
chec
k
S-ter
minal input
chec
k
1
The mode m
ust be s
witched in the cycle of
TV
→
A
V1
→
A
V2
→
A
V3
→
D
VD
→
TV
with
TV/
A
V
k
e
y of R/C
, and the image and v
oice which
correspond to each input/output ter
minals m
ust
be proper
ly output.
* Here
, D
VD is applied f
or the input alone
.
2
When the connector is inser
ted into the S-video
input ter
minal on A
V1, it m
ust be s
witched from
A
V
to S-video and m
ust be proper
ly oper
ated.
Moreo
v
e
r,
chec
k
“A
V1-S”
of OSD
.
3
When the connector is inser
ted into the S-video
input ter
minal on A
V3, it m
ust be s
witched from
A
V
to S-video and m
ust be proper
ly oper
ated.
Moreo
v
e
r,
chec
k
“A
V3-S”
of OSD
.
2
1
Receiv
e E-12CH colour bar (colour bar audio
400Hz 100% MOD of 100% white).
2
The video output m
ust be within the specified
range of 1.0Vp-p
±
3dB at the 75
Ω
ter
minator
.
3
The audio output m
ust be within the specified
range of 1.76Vp-p
±
3dB at the 10k
Ω
ter
mina-
tor
.