Sony TRINITRON KV-HF51P50 Service Manual page 6

KV-HF51P50/XF21M80/XF21M83/XF21N90/XF51M65
RM-952 RM-952
The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY/TIMER lamp will automatically
begin to flash.
The number of times the lamp flashes translates to a probable source of the problem. A definition of the STANDBY/TIMER
lamp 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. DIAGNOSTIC TEST INDICATORS
When an errors occurs, the STANDBY/TIMER lamp will flash a set number of times to indicate the possible cause of the
problem. If there is more than one error, the lamp will identify the first of the problem areas.
Result for all of the following diagnostic items are displayed on screen. No error has occured if the screen displays a "0".
Diagnostic
Item
Description
• Power does not
turn on
• +B overcurrent
(OCP) or
overvoltage
(OVP)
• Vertical deflection
stopped
• Horizontal
deflection
overdrive
• White balance
failure (no
PICTURE)
• Micro reset
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 3-4 of this manual.
RM-952 RM-915
SELF DIAGNOSTIC FUNCTION
No. of times Self-diagnostic
STANDBY/TIMER display/Diagnostic
lamp flashes result
Does not light —
2 times 002:000 or
002:001~255
003:001~255
004:001~255
at the same time
5 times 005:000 or
005:001~225
— 101:00 or
101:001~225
RM-952
Probable
Cause
Location
• Power cord is not plugged
in.
• Fuse is burned out F4601
(F)
• H.OUT Q511 is shorted. (A
board)
• IC1800 is shorted. (C5
board)
• -13V is not supplied. (A
board)
• IC 503 faulty (A board)
• IC 301 faulty (A board)
• G2 is improperly adjusted.
(Note 2)
• CRT problem.
• Video OUT IC1800 is faulty.
(C5 board)
• IC301 is faulty. (A board)
• No connection A board to
C5 board.
• Discharge CRT (C5 Board)
• Static discharge
• External noise
– 6 –
Detected
Symptoms
• 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.
• Power is shut down shortly,
after this return back to
normal.
• Detect Micro latch up.