Sony TRINITRON KD-32XS945 Service Manual page 9

Self-Diagnostic Screen Display
For errors with symptoms such as "power sometimes shuts off" or "screen sometimes goes out" that cannot be confi rmed, it is possible to bring up past
occurrences of failure on the screen for confi rmation.
To Bring Up Screen Test
In standby mode, press buttons on the Remote Commander sequentially, in rapid succession, as shown below:
DISPLAY Channel 5
Handling of Self-Diagnostic Screen Display
Since the diagnostic results displayed on the screen are not automatically cleared, always check the self-diagnostic screen during repairs. When you
have completed the repairs, clear the result display to "0".
Unless the result display is cleared to "0", the self-diagnostic function will not be able to detect subsequent faults after completion of the repairs.
Clearing the Result Display
To clear the result display to "0", press buttons on the Remote Commander sequentially when the diagnostic screen is displayed, as shown below:
NOTE: This will also reset all user functions (including auto programming and picture settings)
Channel 8
ENTER
Quitting the Self-Diagnostic Screen
To quit the entire self-diagnostic screen, turn off the power switch on the Remote Commander or the main unit.
Self-Diagnostic Circuit
IC2300
MAIN MICRO
STBY-LED
STR
48
STBY-LED
44
OCP
45 OVP
43 LOW B ERR
AC RLY
5V
KD-32XS945
Sound Volume +
M
CLKO 29
DATO 30
69
RY6501
1
4
Q6527
Q6530
ENABLE ON
LATCH
Q6532
LATCH
D6537
A
D6505
IC504 D5007
SV REF
O I UNREG 7V
O
POWER .
SELF DIAGNOSIS
2: +B OCP 0
3: +B OVP 0
4: VSTOP
5: AKB
6: LOWB
7: H-STOP 0
101: WDT 24
M
IC2801
Y/C JUNGLE
AKB
58 CRT
26 SCL
VPROT 35 VDY-
R5104 R5105
25
SDA
HPROT 34
R5125
Q5018
P_SW(-)
2
INVERT
2 IC5007
H. PROT
3
MONITOR
D
PH6501
IN RUSH
1K-PROT2
OVER CURRENT
4 1
+B OVP UNREG 11V
3 2
HV PROT
+B OCP
Numeral "0"
0
means that no fault was detected.
1
Numeral "1"
0
means a fault was detected one
time only.
B
5V
D
14
IC6505
+B OVP
2
+B 1
3
R5013
+B +B
D
Q5004
+ B COP
D5005
DETECT
KD-32XS945
Q6522
FOLLOWER
9