Self Diagnosis Function; Diagnostic Test Indicators - Sony KP-FX432M31 Service Manual

The unit in this manual contain a self-diagnostic function. If an error occurs, the STANDBY/TIMER LED will automatically begin to
flash.
The number of times the LED flashes translates to a probable source of the problem. A definition of the STANDBY/TIMER LED flash
indicators is listed in the instruction manual for the user's knowledge and reference. 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.

1-1. DIAGNOSTIC TEST INDICATORS

When an error occurs, the STANDBY/TIMER LED will flash a set number of times to indicate the possible cause of the problem. If there
is more than one error, the LED will identify the first of the problem areas.
Result for all of the following diagnostic items are displayed on screen. If the screen displays a "0", no error has occurred.
Diagnostic No. of times
Item STANDBY/TIMER
Description LED flashes
• Power does not Does not light
turn on
• +B overcurrent 2 times
(OCP)
•+B overvoltage 3 times
(OVP)
• Vertical deflection 4 times
stopped
• White balance 5 times
failure
(not balanced)
•LOW B down*** 6 times
• Horizontal 7 times
deflection stopped
• Audio Protection 8 times
• Zero crossing 9 times
detector
• HV protection 10 times
* If a +B overcurrent is detected, stoppage of the vertical detection is detected simultaneously. The symptom that is diagnosed
first by the microcontroller is displayed on the screen.
** Refer to screen (G2) adjustment (fine adjustment) in section 2 of this manual.
*** Is STNDBY/TIMER LED flashes six (6) times, unplug the unit and wait 10 seconds before performing the adjustment.
SECTION 1

SELF DIAGNOSIS FUNCTION

Self-diagnostic
Probable Cause Location
display/
Diagnostic result
• Power cord is not plugged in.
• Fuse (F6000) is burned out.
(A board)
Item 2:1 • H. OUT (Q5001) is shorted.
or more than 1 • +B PWM (Q5201) is shorted.
(D board)
Item 3:1 • IC6503 is faulty. (D board)
or more than 1
Item 4:1 • 15V is not supplied. (D board)
or more than 1 • IC5101 is faulty. (D baord)
Item 5:1 • Video OUT
or more than 1 (IC9101,IC9201,IC9301) is faulty.
(CR,CG,CB board)
• CRT drive (IC0401) is faulty.
(MG board)
• G2 is impropenrly adjustd.**
Item 6:1 • +5V line is overloaded.
or more than 1 (A, BM, MG boards)
• +5V line is shorted.
(A, BM, MG boards)
• IC6201is faulty. (A board)
Item 7:1 • Q5006 is broken. (D board)
or more than 1 • IC0401 is faulty. (MG board).
Item 8:1 • + or - 22V audio supply is not
or more than 1 present - Check PS2001 &
PS2000.
Item 9:1 • D6166 or D6114 is open.
or more than 1 (A board)
Item 10:1 • Q8014 or Q6013 have shorted
or more than 1 replace along with R8051 on D
board.
• IC8005 is damaged. (D board)
– 5 –
KP-FX432M31/FX432M91/FX532M91
RM-998 RM-998
Symptoms
• Power does not come on.
• No power is supplied to the PJ.
• AC power supply is faulty.
• Power does not come on.
• Load on power line is shorted.
• Has entered standby mode.
• Has entered standby mode after
horizontal raster.
• Vertical deflection pulse is
stopped.
• Power line is shorted or power.
• No raster is generated.
• CRT cathode current detection
reference pulse output is small.
• No picture.
• No picture.
• No picture.
•No picture.
• No picture.
RM-998