7-6
CONTINUE 1
CONTINUE 2
OK
NG
Measure R/G/B cathode voltages at TP-R, TP-G and TP-B on the CRT PWB
(PWE-567C). Normally, the DC voltage is between approx. 80V
DC
and 150V
DC
at
point A when BRIGHTNESS is preset. The DC voltage moves 15V or 20V when
BRIGHTNESS changes from min. to max..
NG
Measure the voltage at C747 on the VIDEO PWB (PWB-567A). The
voltage is approx. 230V.
NG
OK
OK
Measure the voltage at TP-G2 on the CRT PWB (PWB-567C). Normally, the
screen voltage is 700
!
15V
DC
. Adjust 700
!
5V
DC
if it is different.
NG
OK
Measure the voltage at IC7F1 pin 3 on the CRT PWB (PWE-567C). The voltage
is approx. 6.2V.
CONTINUE
A
GND
IC731 failure.
BNC:
LC761R/G/B, C701R/G/B, C702R/G/B or MD701R/G/B failure.
D-SUB: LC762R/G/B, C703R/G/B, C704R/G/B or MD702R/G/B failure.
Check R/G/B cathode
voltage video output
Check the power
supply voltage of
clamp circuit
LC76A, LC76N or CNP failure.
D741 R/G/B, Q741R/G/B, IC742 or IC751 failure.
Check the screen voltage
・
R905, C903, C904 or CNCRT on the CRT PWB (PWB-567C),
T5R1 (FBT) on the SW/HV PWB (PWB-571) or screen wire failure.
・
Check H OSC/DEF/HV circuit (see item 6)
Check the heater voltage
Summary of Contents for MultiSync FP1370
Page 13: ...4 4 REMARK SYMBOL Mount the EMF PWB 121E REMARK SYMBOL Clamp the connector ...
Page 14: ...4 5 REMARK SYMBOL COIL FORMING UPPER SIDE REMARK SYMBOL COIL FORMING LOWER SIDE ...
Page 23: ...4 14 REMARK SYMBOL REMARK SYMBOL Clamp CN CA CN CC and CN D with CLAMPER WIRE ...
Page 26: ...4 17 REMARK SYMBOL Clamp the wires SAFETY REMARK SYMBOL Clamp the wires CN ASD CN AF 21 ...
Page 80: ...5 51 Fig 3 11 CONV PWB Fig 3 12 EMF PWB CN EMF CN LL CN RR CNEM CN CA CN D CN CCB HS8N1 ...
Page 143: ...8 18 15V 80V AFC D FOCUS Fig 3 1 HIGH VOLTAGE CIRCUIT AND PROTECTOR CIRCUIT ...
Page 260: ...10 1 ...
Page 261: ...10 2 ...
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Page 266: ...for Human Potential ...
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