Sharp C-2890EES, Руководство по обслуживанию

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14
AK - 45
CHASSIS
13.4.2.Features
Video Decoding and Processing
– four CVBS, one S-VHS input, one YC
R
C
B
component input
– integrated high-quality A/D converters and associated clamp and AGC circuits
– adaptive 2H comb filter Y/C separator
– multistandard colour decoder PAL/NTSC/SECAM including all substandards
– multistandard sync decoder
– automatic standard recognition
– black-line detector
– linear horizontal scaling (0.25...4), as well as non-linear horizontal scaling “Panoramavision”
– black-level expander
– dynamic peaking
– soft limiter (gamma correction)
– colour transient improvement
RGB Processing and Deflection
– programmable RGB matrix
– two analog RGB / Fastblank inputs
– half-contrast switch
– picture frame generator
– scan velocity modulation output
– high-performance H/V deflection
– separate ADC for tube measurements
– EHT compensation
– angle and bow correction
– one 20.25 MHz crystal, few external components
–I
2
C-Bus Interface
– 64-pin PSDIP package
13.4.3.Pin Connections and short descriptions
NC = not connected
LV = if not used, leave vacant
X = obligatory; connect as described in circuit diagram IN = Input
OUT = Output SUPPLY = Supply Pin
Pin no
PSDIP 64-pin Pin name Type Connection
(if not used) Short description
1 TEST IN GNDD Test Input
2 RESQ IN X Reset Input
3 SCL IN/OUT X I
2
C Bus Clock
4 SDA IN/OUT X I
2
C Bus Data
5 GNDD SUPPLY X Digital Ground
6 HCS IN LV Half Contrast Switch Input
7 FSY OUT LV Front Sync Output
8 CSY OUT LV Composite Sync Output
9 VS OUT LV Vertical Sync Output
(=VS Bit of MSY for TPU)
10 INTLC OUT LV Interface Control Output
11 VPROT IN GNDAB Vertical Protection Input
12 SAFETY IN GNDAB Safety Input
13 HFLB IN HOUT Horizontal Flyback Input
14 GNDD SUPPLY X Digital Ground
15 VSUPD SUPPLY X Digital Supply Voltage (3.3V)
16 GNDD SUPPLY X Digital Ground
17 VSUPD SUPPLY LV Digital Supply Voltage (3.3V)
18 P0 IN/OUT LV Port 1, Bit 0
19 P1 IN/OUT LV Port 1, Bit 1
20 P2 IN/OUT GNDD Port 1, Bit 2
21 P3 IN/OUT GNDD Port 1, Bit 3
22 P4 IN/OUT GNDD Port 1, Bit 4
23 P5 IN/OUT GNDD Port 1, Bit 5
24 P6 IN/OUT GNDD Port 1, Bit 6