Self Diagnosis Function; Diagnostic Test Indicators - Sony KP-FR43M31 Service Manual

KP-FR43M31/FR43M91
RM-GA001
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 defination of the STANDBY/TIMER
LED flash indicators is listed in the intruction 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 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
Item
Description
• Power does not
turn on
• +B overcurrent
(OCP)
• +B overvoltage
(OVP)
• Vertical deflection
stopped
• White balance
failure
(not balanced)
• LOW B down***
• Horizontal
deflection
stopped
• Audio Protection
• Zero crossing
detector
• HV protection
* 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 STANDBY/TIMER LED flashes six (6) times, unplug the unit and wait 10 seconds before performing the adjustment.
SELF DIAGNOSTIC FUNCTION
No. of times Self-diagnostic
STANDBY/TIMER display/
LED flashes Diagnostic result
Does not light
2 times Item 2:1
or more than 1
3 times Item 3:1
or more than 1
4 times Item 4:1
or more than 1
5 times Item 5:1
or more than 1
6 times Item 6:1
or more than 1
7 times Item 7:1
or more than 1
8 times Item 8:1
or more than 1
9 times Item 9:1
or more than 1
10 times Item 10:1
or more than 1
SECTION 1
Probable Cause Location
— • Power cord is not plugged
in.
• Fuse (F6000) is burned out.
(A board)
• H.OUT (Q5001) is shorted.
• +B PWM (Q5201) is
shorted. (D board)
• IC6503 is faulty. (D board)
• 15V is not supplied.
(D board)
• IC5101 is faulty. (D board)
• Video Out
(IC9101,IC9201,IC9301)
is faulty. (CR,CG,CB board)
• CRT drive (IC0401) is faulty.
(MG board)
• G2 is impropenrly adjustd.**
• +5V line is overloaded.
(A, BM, MG boards)
• +5V line is shorted.
(A, BM, MG boards)
• IC6201 is faulty. (A board)
• Q5006 is broken. (D board)
• IC0401 is faulty. (MG board)
• + or - 22V audio supply
is not present - Check
PS2001 & PS2000.
• D6166 or D6114 is open.
(A board)
• Q8014 or Q6013 have
shorted replace along with
R8051 on D board.
• IC8005 is damaged.
(D board)
– 4 –
Symptoms
• Power does not come on.
• No power is supplied to the PJ.
• AC power supply is faulty.
• Power does not turn 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.