Service manual

4242

2. REC mode

•

Signal is put in to #31 of IY01(LA7423A), and it is seperated into Luminance and Chroma within IC.FM modulated

luminance signal is put in to #34 and low-frequency transformed color signal is put in to #14.

After passing through REC EQ, circuit for adjusting REC characteristics, FM modulated signal is put in to

IY03(LA7411)#8 and color signal put out to #11 is put in to IY03 #3.

•

The signal put in to #7, #8 of IY03(LA7411) is recorded on the tape by HEAD through AGC and REC CUR

RENT AMP.

3. PB Mode

•

In case of SP, the signals on #17, #20 of IY03(LA7411) are amplified to 60dB respectively by V.SW, put out

to #7 IY03 and put in to #4 IY01(LA7423A)

•

FM signal put in to #14 of IY01 is demodulated at FM DEMODULATIOR after passing through FM EQ.

within IC and put in to Y/C MIXER after passing through 3.0MHz LPF to eliminate color signal component.

•

While FM signal put in to #14 of IY01 is passing through 1.3MHz LPF. Only low-frequency transformed color

signal passes.

The color signal is converted to 3.58MHz at Main CONVERTER and is put in to Y/C MIXER after it's

amplified to 6dB and goes through ACC/BURST EMPHASIS. Y/C signal is put out to #28.

VIDEO OUT

HA SW REC "H"

7.1M LPF

IY02 8

LC89960

IH CCD IC

REC EQ R/T

R/T

VIDEO IN

31 28

IY01

LA7423A

Y/C PROCESS IC

9111718

IY03

LA7411

814

PRE-AMP

715