Self Diagnosis Function - Sony Trinitron KV-XR29M80 Service Manual

The units in this manual contain a self diagnosis function. If an error occurs, the STANDBY (1) indicator will automatically
begin to flash. The number of times the STANDBY (1) indicator flashes translates to a probable source of the problem. If
an error symptom cannot be reproduced, the remote commander can be used to review the failure occurrence data stored
in memory to reveal past problems and how often these problems occur.
1. DIAGNOSIS TEST INDICATORS
When an errors occurs, the STANDBY/(1) indicator will flash a set number of times to indicate the possible cause of the
problem. If there is more than one error, the indicator will identify the first of the problem areas.
Result for all of the following diagnosis items are displayed on screen. No error has occured if the screen displays a "0".
Diagnosis No. of times
Item STANDBY/TIMER
Description lamp flashes
• Power does not Does not light
turn on
• +B overcurrent 2 times
(OCP)*
• I-Port 4 times
• IK (AKB) 5 times
• HV Protect 8 times
Note 1: If a + B overcurrent is detected, stoppage of the vertical deflection is detected simultaneously.
The symptom that is diagnosed first by the microcontroller is displayed on the screen.
Note 2: Refer to screen (G2) Adjustment in section 2-4 of this manual.

SELF DIAGNOSIS FUNCTION

Self-diagnostic
display/Diagnosis
result
— • Power cord is not plugged
in.
• Fuse is burned out (F4601)
(A Board)
2:0 • H.OUT (Q511) is shorted.
2:1 ~ 255 (A board)
• IC751 is shorted.
(C/CV Board)
4:0 • +13V is not supplied.
4:1 ~ 255 (A Board)
• IC503 voltage list is faulty.
(A Board)
5:0 • Video OUT (IC751) is faulty.
5:1 ~ 255 (C Board)
• IC001 is faulty. (A Board)
• Screen (G2) is improperly
adjusted.
8:0 • IC604 faulty.
8:1 ~ 255 • IC607 faulty.
– 3 –
Probable
Cause
Location
• Power does not come on.
• No power is supplied to the
TV.
• AC power supply is faulty.
• Power does not come on.
• Load on power line is
shorted.
• Has entered standby state
after horizontal raster.
• Vertical deflection pulse is
stopped.
• Power line is shorted or
power supply is stopped.
• No raster is generated.
• CRT cathode current
detection reference pulse
output is small.
• No power supply to CRT
ANODE.
• No RASTER is generated.
KV-XR29M80
RM-W104
Detected
Symptoms