Panasonic EURO 4 Chassis Technical Manual page 32

3DQDVRQLF
:
Pin 77 - G.M.C ( Wide Screen 32'' Only ).
Output from pin 77 of the microprocessor
Geo-Magnetic Correction control, this is used for 16:9
CRTs which is required to cancel the effects of the
earth's magnetic field.
: Pin 78 - Mix Switch ( Wide Screen Only )
The mix switch control is responsible for the mixing of
the luma and chroma signals of an S-VHS input via
AV2 or AV3 when AV2 signal out has been selected.
:
Pin 79 - Chroma Switch ( Wide Screen Only )
The chroma switch control output from pin 79 of the
microprocessor IC1101
switching transistors Q3202,
M-Board. This control line which is fed to the M-Board
via connectors E16 and M1 pin5 is used to select
between the chroma signals input from the S-VHS
inputs of AV3 and AV2.
:
Pin 81 - LED
The standby LED D1071 located on the N-Board
( D1061 located on the M-Board ), is controlled via pin
81 of the microprocessor IC1101. In standby mode,
IC1101
is used to control the
Q3204 located on the
the pin is set to a HIGH level which causes
Q1062
is the E-Board (
causing the standby LED to light up. Pin 81 is also
used to flash the standby LED when the Infra-red
remote control receiver receives a signal from the
remote control.
:
Pin 82 - Pos/Neg.
Pin 82 of the microprocessor
between PAL/NTSC (Negative modulation) and
SECAM (Positive modulation) standards selection
which is carried out in the I.F. stage.
:
Pin 83 - L/L'
Pin 83 of the microprocessor
between the two types of SECAM standards L/L', this
control signal being fed to the Tuner / I.F. stage used
on SECAM L models only.
:
Pin 84 - D/K
Pin 84 of the microprocessor
the switching of Transistor
which are able to process D/K audio sound.
32
Q1052
on the M-Board ) to switch ON
IC1101 is used to select
IC1101 is used to select
IC1101 is used to control
Q103 for those models
on