8-6
5) On Screen Manager (OSM)
The OSM circuit consists of IC791 (OSM controller) and IC711 (Pre-amp) which matrix the video signal and
the OSM signal. IC791 receives the display data from IC801 (CPU), and the signal outputs R, G, B and
Blanking are fed out of pins 13, 15, 17 and 12 respectively. The OSM signals are mixed with video signals in
IC711 (Pre-amp). The OSM screen brightness is controlled by I
2
C BUS from CPU.
(Fig 1.5) On Screen Manager
6) Self Test
There are two ways to activate the self test function,.
User mode: power on the monitor while holding down the RESET switch
Factory mode: no H/C sync and SOG of selected input mode
When the self test mode is activated, IC801(CPU) controls IC501 to oscillate at approx.61.6KHz. Thus the
horizontal deflection circuit and the high voltage circuit operate at this frequency. When Q797 is turned off by
S_BIAS signal from IC801(CPU). The pseudo vertical sync signal count down from the horizontal sync signal
with IC8M1 is effective, and the shape AFC pulse are fed to IC791 and IC7A1, the clamp pulse for IC711 is
generated by IC7A1. The video signal is generated by IC791, and fed to IC721(Output amp) via IC711(PRE-AMP).
IC711
M52742ASP
PRE-AMP
IC791
M35070-050FP
OSM CONTROLLER
IC801
CPU
G
13
9
4
1
15
13
17
12
18
19
BLK
R
B
H.Sync (AFC_T)
V.Sync (VD_B)
I
2
C
IC791
M35070-050FP
OSM
IC801
CPU
IC501
HE6-0092
DSP(OSC IC)
IC711
M52742ASP
PRE-AMP
IC8M1
BU6483K
AUTO SIZE
IC721
VPS16
OUTPUT-AMP
IC7A1
M52347FP
I/F
DEFLECTION
CIRCUIT
V(PUMP)
AFC(TTL)
CLAMP
PULSE
R/G/B
R/G/B/BLK
VD_SELF
I
2
CBUS
S_BIAS
(Fig1.6) Self Test
Содержание MultiSync FP1370
Страница 13: ...4 4 REMARK SYMBOL Mount the EMF PWB 121E REMARK SYMBOL Clamp the connector ...
Страница 14: ...4 5 REMARK SYMBOL COIL FORMING UPPER SIDE REMARK SYMBOL COIL FORMING LOWER SIDE ...
Страница 23: ...4 14 REMARK SYMBOL REMARK SYMBOL Clamp CN CA CN CC and CN D with CLAMPER WIRE ...
Страница 26: ...4 17 REMARK SYMBOL Clamp the wires SAFETY REMARK SYMBOL Clamp the wires CN ASD CN AF 21 ...
Страница 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 ...
Страница 143: ...8 18 15V 80V AFC D FOCUS Fig 3 1 HIGH VOLTAGE CIRCUIT AND PROTECTOR CIRCUIT ...
Страница 260: ...10 1 ...
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