BELINEA Belinea 103052, Руководство по обслуживанию

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Belinea 103051 Technical Service Manual
Symptom
c) Screen is black
but high voltage
is present
d) Screen is black
with no high
voltage.
Check(YES)
1) Check for 80V at anode of
DP12
2) Check for 12V at pin7 of ICH03
3) Check Switching pulse of pin6
of ICH03
4) Check Switching pulse at Drain of
QH04
5) Check TH04(FBT)
Action(NO)
Check 15pin connector
ZDM01,QM04.
Check ICM01,ICH01
Check CH03, RH06, CH04,RH07,RH08
CH05, CH06
Replace ICH01
Check RH10, TH05
e) Focus Bad
1) Check for focus waveform at
pin32 ICH01
2) Check for 700V at anode of DH24
3) Check Emitter pules of QH18
4) Adjust Focus VR of FBT
f) No Power
1) Check for AC input voit of AI01
2) Check ICP01 pin 3,4
3) Check switch pulse at Drain of QF01
4) Check voltage for, 180V at anode of
DP11 and 5V at pin3 of ICH01
Check ICH01
Check DH24, TH04
Check QH05,QH06,QH17,QH18
Check Power cord,AI01
Check ICP01,NTC01,DP01
Check ,ICP01,TP01,ICF01,ICP03,DP11
Recheck above ltem d
Check 80V with no load if no 80V
Check SMPS If 80V OK, Check TH04
QH04,DH05
Check 12V with no load If no 12V,
Check QP10,DP15,QP07, SMPS
If 12V OK, Check ICH01,ICH03,ICC01
Check ICH03, RH24, CH11
Check QH04
1) Check for G2, Pin 4 of CRT.
Around 550 volt
2) Check for heater voltage at Pin 6 of
CRT. (6.3V)
3) Can screen be lit with brightness
control at MAX
4) Check for video at Pin 5,8,10 of ICC01
5) Check for positive pulse for clamp at
Pin 18 of ICC01.
6) Check for video pin 21,24,26
of ICC01
7) Check for video at Pin 6,7,9 of ICC03.
8) Check for video at Pin 1,2,3 of
ICC03.
9) Check if R,G,B cut-off control the
video DC level at Pin 4,6,9 of CRT.
10) Check CRT.
Check RC06,SGC05,CC36,CC38
Socket
Check CNC01,RC66,DP13
Check RC35,CC32,QC13,QC14,RC59
Check connector CNC02,DC15~DC20,
RC46~48
Check pin 33 of ICM01
Check ICC01, ICM01
Check ICC03, RC26, RC27, RC28
Check ICC03, 80V(dc pin4),
12V(dc pin10)
Check QC03~QC08, CRT socket
b) Image is
unstable.
1) Check for H-sync at Pin 33 at ICM01
2) Check for positive going V-sync at
Pin 15 at ICH01.
3) Will H-oscillator is locked with input
signal Pin 29 of ICH01.
4) Check H-out at Pin 8 of ICH01.
5) Check for flyback pulse at Pin 1
of ICH01