40
KRP-M01
1
2
3
4
A
B
C
D
E
F
1
2
3
4
[4] VIDEO SYSTEM
Flowchart of Failure Analysis for The Video System
Is the input selector set to T
V
?
(Analog)
Set the Input selector to T
V
.
(Analog)
N
o
N
o
Check the circuits between IC5101 and IC4702.
If there was no problem, replace the MAI
N
BLOCK Assy.
N
o
Check around IC5101 and check the communications
between IC5101 and microcomputer. If there was no
problem, replace the MAI
N
BLOCK Assy.
Check around IC4702 and check the communications
between IC4702 and microcomputer. If there was no
problem, replace the MAI
N
BLOCK Assy.
N
o
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
N
o
N
o
An abnormality occurs in the ASIC
ARIA or its peripheral circuits.
Replace the MAI
N
BLOCK Assy.
Yes
Analog tuner signal is not
displayed on the screen.
=> AT
V
Is a signal input to IC5101
(C
V
BS_S
W
)? (pin 57)
Has the signal arrived at emitter
of Q5304?
N
o
Replace the U5301 (TU
N
ER).
Yes
W
hich signal is not output,
main or sub signal?
Is a signal output from IC5101
(C
V
BS_S
W
)? (pin 45)
Are the data output from IC4702
(
V
DEC)? (pins 93 to 97, 99 to 104,
107 to 109)
Yes
Has the signal arrived at IC4702
(
V
DEC)? (pin 22)
Yes
Yes
Yes
Is the communication between
each IC (
V
DEC, ASIC) on the
MAI
N
BLOCK Assy and the
microcomputer normal?
Yes
Has the signal arrived at IC4702?
(pin 70)
Yes
MAI
N
SUB
1
N
o
Is a HS signal input to IC6811
(IFUCOM)? (pin 3)
Has the signal arrived at pin 6 of
Q5307?
Check around the Q5307 (Sync separation).
Repair the failure points, then check again.
Yes
Check around the Q5304.
Replace the Q5304, then check again.
N
o
Replace the U5301 (TU
N
ER).
Yes
2
4
5
4
N
o
N
o
Are the data output from IC4702?
(pins 79 to 86, 88 to 90)
Yes
Yes
5
Is a signal output from IC5101?
(pin 49)
3
3
2
IC6
8
11 - pin 3
V
: 1
V
/div H: 10
μ
sec/div
1
IC5101 - pin 57 (in)
V
: 500 m
V
/div H: 10
μ
sec/div
3
IC5101 - pins 45, 49 (out)
V
: 500 m
V
/div H: 10
μ
sec/div
4
IC4702 - pins 22, 70
V
: 500 m
V
/div H: 10
μ
sec/div
5
IC4702 - pins 93, 79 (656 out)
V
: 1
V
/div H: 2
μ
sec/div
Waveforms
Input signal: PAL Color-bar (Analog tuner)
Summary of Contents for krp-m01
Page 8: ...8 KRP M01 1 2 3 4 A B C D E F 1 2 3 4 2 3 PANEL FACILITIES ...
Page 9: ...9 KRP M01 5 6 7 8 5 6 7 8 A B C D E F Remote Control Unit ...
Page 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 ...
