43
KRP-M01
5
6
7
8
5
6
7
8
A
B
C
D
E
F
Is the function corresponding to
selected signal input selected?
Select the corresponding signal
with the input selector.
N
o
N
o
N
G
N
o
N
o
Yes
Image for the component signal
is not displayed.
=> COMP/PC1
Yes
Is a signal output from IC5501
(RGBS
W
)? (pins 30, 32, 34)
Has the signal arrived at IC4801
(ADC)? (pins 43, 48, 54)
Yes
Yes
27
30
26
25
29
2
8
Check around a JA8303.
N
o
Specifications that does not
display in the sub-side.
Has the signal arrived at IC5501
(RGBS
W
)? (pins 86, 88, 90)
SUB
Is the screen of main side Tuner?
W
hich signal is not output,
main or sub signal?
Yes
MAI
N
24
23
22
Check around IC5501 and check the communications
between IC5501 and microcomputer.
If there was no problem, replace the MAI
N
BLOCK Assy.
Check around the IC that is found to have failure in
communication and the microcomputer.
If there was no problem, replace the MAI
N
BLOCK Assy.
N
o
Replace the MAI
N
BLOCK Assy.
Yes
Is the communication between
each IC (ADC, ASIC) on the
MAI
N
BLOCK Assy and the
microcomputer normal?
22
IC5501 - pin
8
6 (Y)
V
: 500 m
V
/div H: 10
μ
sec/div
23
IC5501 - pin
88
(Pb)
V
: 500 m
V
/div H: 10
μ
sec/div
24
IC5501 - pin 90 (Pr)
V
: 500 m
V
/div H: 10
μ
sec/div
25
26
IC5501 - pin 34 (Y)
V
: 500 m
V
/div H: 10
μ
sec/div
IC5501 - pin 32 (Pb)
V
: 500 m
V
/div H: 10
μ
sec/div
27
IC5501 - pin 30 (Pr)
V
: 500 m
V
/div H: 10
μ
sec/div
2
8
IC4
8
01 - pin 4
8
(Y)
V
: 500 m
V
/div H: 10
μ
sec/div
29
30
IC4
8
01 - pin 43 (Pb)
V
: 500 m
V
/div H: 10
μ
sec/div
IC4
8
01 - pin 54 (Pr)
V
: 500 m
V
/div H: 10
μ
sec/div
Waveforms
Input signal: Color-bar (Component 720p/50 Hz)
Check the FFC (J203) between MAI
N
BLOCK and REAR_IO
Assys. If there was no problem, replace the REAR_IO Assy.
Check the circuits between IC5501 and IC4801.
If there was no problem, replace the MAI
N
BLOCK Assy.
Содержание krp-m01
Страница 8: ...8 KRP M01 1 2 3 4 A B C D E F 1 2 3 4 2 3 PANEL FACILITIES ...
Страница 9: ...9 KRP M01 5 6 7 8 5 6 7 8 A B C D E F Remote Control Unit ...
Страница 14: ...14 KRP M01 1 2 3 4 A B C D E F 1 2 3 4 4 BLOCK DIAGRAM 4 1 OVERALL WIRING DIAGRAM ...
Страница 121: ...121 KRP M01 5 6 7 8 5 6 7 8 A B C D E F ...