Pulse Width - Aiwa TV-AR205 Service Manual

Nota:
* Estes ajuste não devem ser alterados em hipótese nenhuma, caso isto ocor-
ra a EEPROM deverá ser inicializado novamente (Selecione e execute o re-
gistrador 39).
Initial conditions about some features after reset are: DSC off, Portuguese to
language, blue background off and Closed Caption off.
Register 20 (BIT)
BIT Description
Bit0 Not-used Not used
Bit1 HBL Normal Blanking
Bit2 IFS IF Sensitive
Bit3 COR Noise coring
Bit4 EVG Vertical guard
Bit5 STM Search tuning mode
Bit6 LBM Blanking mode
Bit7 VID Video ident mode
Register 22 (OP2)
BIT Description
Bit0 - Field indicator is inverted or
no
Bit1 - Field selection to 50 Hz
Bit2 - Field selection to 60 Hz
Bit3 VPD VPD Vertical Pulse Delay
Bit4 PW0 PW0 vertical sync Pulse
Width 0
Bit5 PW1 PW1 vertical sync Pulse
Width 1
Bit6 VR0 VR0 Voltage Reference 0
Bit7 VR1 VR1 Voltage Reference 1
0 VSYNC input is delayed by 8 to 24 µs before field detection
1 VSYNC input is not delayed
VR1 VR0
0 0
0 1
1 0
1 1
Note:
The register 22 (OP2) is used to make adjustment about some Closed
Caption parameters in the microcontroller.
The register 23 (OP3) is used to make vertical positioning of Closed Caption
in the microcontroller.
All manuals and user guides at all-guides.com
Binary description about some registers:
VPD
Nominal Bias
3.12 V
2.98 V
2.84 V
2.70 V
35
Register 21 (OP1)
BIT Description
Bit0 - Force vertical in 60Hz
(Automatic Programming)
Bit1 - Stereo menu (AV mode)
Bit2 FOA Phase timing const. #1
Bit3 FOB Phase timing const. #2
Bit4 BCO ON/OFF behavior
Bit5 - Aiwa indication
Bit6 POC POC control
control.
Bit7 Not used Not used
Register 23 (OP3)
BIT Description
Bit0 - C.C initial pos. set 0 – 60Hz
Bit1 - C.C initial pos. set 1 – 60Hz
Bit2 - C.C initial pos. set 2 – 60Hz
Bit3 - C.C initial pos. set 3 – 60Hz
Bit4 - C.C initial pos. set 0 – 50Hz
Bit5 - C.C initial pos. set 1 – 50Hz
Bit6 - C.C initial pos. set 2 – 50Hz
Bit7 - C.C initial pos. set 3 – 50Hz
PW1 PW0
0 0
0 1
1 0
1 1
POC off=1

Pulse Width

8 µs
10 µs
12 µs
14 µs