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18) orth
DX-C101
=HOW TO CHECK AGC CIRCUIT =
* The level of 1C-101 pin @ (ARF
signal) becomes 0.4 Vp-p.
Is RF signal converted by the
|No|
Auto gain contro! circuit
AGC circuit to on ARF signal
1C-101
with a constant amplitude?
Yes
Is ARF signal converted by
No
Data slice circuit
=HOW TO CHECK SRF CIRCUIT=
DSL circuit to SRF signal?
IC-102
* Check (SRF signal) at (C-102 pin @.
Yes
ts SRF signal synchronized
No)
Phase loop circuit
=HOW TO CHECK SYNCHRONIZE =
with PCK signal?
IC-301, 1C-102
* Check 1C-102 pin @ by
Yes
oscilloscope in triggered mode with
RF signal and if output waveform at
IC-102 pin @ can be synchronized
in-phase, the level 1C-301 pin @
becomes 2.5 volts.
Is CLV servo changed to
NO}
CLV circuit
=HOW TO CHECK PHASE
phase-comparison mode?
10-301
COMPARISON =
* Check waveform at IC-301 pin @
Yes
(EC signal).
* Check IC-102 pin @ for PCK
waveform.
No
9
ls audio signal activated?
DIA converter clrcult
1C-801
NORMAL OPERATION
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