7-14
5-4. Vertical Position
5-5. Poor Linearity
5-5-1. Horizontal
5-5-2. Vertical
Check whether the DC voltages level at CN-DSB pin 12 on the DEF
PWB (PWE-624) varies by OSD vertical position control or not?
・
IC501 failure.
・
Digital control circuit failure. (see item 12)
Check whether the DC voltages level at IC421 pin 8 on the DEF
PWB (PWE-624) varies by OSD vertical position control or not?
・
IC401, VDY or their ambient circuit failure.
・
IC421 or its ambient circuit failure.
Check if the vertical linearity on the screen varies by OSD ‘VERTICAL
LINEARITY’ and ‘VERTICAL LINEARITY BALANCE’.
・
IC501 failure.
・
Digital control circuit failure. (see item
12)
Check the D/A converter output. (IC532 pin 4,18,19)
・
IC532 or its ambient circuit failure.
・
Digital control circuit failure. (see item 12)
・
Q421, Q422, Q423 or their ambient circuit failure.
・
IC421 or its ambient circuit failure.
0V
V. saw wave
Position down
Position up
NG
OK
NG
OK
NG
Check an item 5-1.
OK
T571, Q571, IC591
、
IC532(pin 17) or their ambient circuit failure.
NG
OK
OK
55 70
90
105 130
160
5V
0V
5V
0V
5V
0V
Vertical frequency (Hz)
pin 4
pin 18
pin 19
Check the voltage at IC532 pin 4,18 and 19.
The output voltages of each pin are as follows.
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 ...
Page 262: ...10 3 ...
Page 263: ...10 4 ...
Page 264: ...10 5 ...
Page 266: ...for Human Potential ...
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