Compaq CRT Monitor s7500 Service Manual page 30

32
1
PIN SYMBOL
Horizontal Flyback Input
1 HFLB
X-ray Protection Input
2 XRAY
B + Control OTA Output
3 BOP
B + Control Comparator Input
4 BSENS
B + Control OTA Input
5 BIN
B + Control Driver Output
6 BDRV
Power Ground
7 PGND
Horizontal Driver Output
8 HDRV
9 XSEL Select Input for X-ray reset
Supply Voltage
10 Vcc
EW Waveform Output
11 EWDRV
Vertical Output 2 (Ascending Sawtooth)
12 VOUT2
Vertical Output 1 (Descending Sawtooth)
13 VOUT1
Vertical Synchronization Input
14 VSYNC
Horizontal / Composite Synchronization Input
15 HSYNC
Video Clamping Pulse / V-Blanking Output
16 CLBL
TDA4857 Autosync Deflection Controller
DESCRIPTION
HFLB
1
XRAY
2
BOP 3
BSENS
4
5
BIN
6
BDRV
7
PGND
HDRV
8
TDA4857
XSEL
9
VCC 10
EWDRV
11
VOUT2
12
VOUT1 13
VSYNC
14
HSYNC
15
CLBL 16
Pin Configuration
PIN SYMBOL
H-Synchronization Unlock/Protection/V-Blanking Output
17 HUNLOCK
2
I C-Bus Clock Input
18 SCL
2
I C-Bus Data Input
19 SDA
Internally connected; nite 1
20 i.c
Input for EHT Compensation (Via V-Size)
21 VSMOD
22 VAGC External Capacitor for V-Amplitude Control
External Resistor for Vertical Oscillator
23 VREF
External Capacitor for Vertical Oscillator
24 VCAP
25 SGND Signal Ground
External Filter for PLL1
26 HPLL1
Buffered F/V Voltage Output
27 HBUF
Reference Current for Horizontal Oscillator
28 HREF
External Capacitor for Horizontal Oscillator
29 HCAP
External Filter for PLL2 / Soft Start
30 HPLL 2
Input for EHT Compensation (Via H-Size)
31 HSMOD
Output for Vertical Focus
32 FOCUS
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32 FOCUS
31 HSMOD
30 HPLL2
29 HCAP
28 HREF
27 HBUF
26 HPLL1
25 SGND
24 VCAP
23 VREF
22 VAGC
21 VSMOD
20 i.c
19 SDA
18 SCL
17 HUNLOCK
DESCRIPTION