Waveforms; No Hi-Fi Playback In Record/Playback Mode (Rec Mode); No Sound In Jk101 Coaxial Jack - Sanyo DVR-V100E Service Manual

TROUBLESHOOTING
D. No Hi-Fi playback in record/playback mode (REC MODE)
Check input SCART JACK.
Are there Audio signal
NO
Check input front jack.
at IC251 pin#2~11?
Check ICD02(DVD).
YES
NO
Is FM OSC signal at IC251
Replace IC251
pin#36?
YES
NO
Is FM OSC signal at P401 pin#2?
Replace DRUM.
YES
HEAD CLEANING.
E. No NORMAL AUDIO playback (PLAY MODE)
NO
Voltage at IC251 pin#34 is 12V?
Is there normal Audio signal at
Voltage at IC251 pin#40 and at
IC251 pin#17, 18?
IC301 pin#18 is 5V?
YES
Is Playback Audio signal at
IC301 pin#11?
YES
Is there Playback Normal Audio
signal at IC251 pin #16,17?
YES
Check Output JACK.
F. No Sound in JK101 COAXIAL Jack.
Pin #25 of P100 is Digital NO
Check MPEG board.
signal SPDIF?
YES
Check JK101 and PCB pattern.
NO
Check power circuit.
NO
Check A/C HEAD and IC301
NO
Replace IC251.
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WAVEFORMS

1. VIDEO
! !
(IC301-70) 5Vp-p (IC301-70)5Vp-p
1V/2msec/cm 1V/2msec/cm
REC PLAY
# #
(IC301-43) 520mVp-p (IC301-43) 520mVp-p
100mV/5usec 100mV/5usec
REC PLAY
% %
(IC301-67) 4.6Vp-p (IC301-67) 4.6Vp-p
2V/10usec/cm 2V/10usec/cm
REC/PLAY PICTURE SEARCH
& (IC301-28) 450mVp-p
200mV/0.1usec/cm
@ @
(IC301-46) 520mVp-p (IC301-46) 520mVp-p
200mV/5usec/cm 200mV/5usec/cm
REC PLAY
$ $
(IC301-21) 600mVp-p (IC301-21) 350mVp-p
200mV/2msec/cm 200mV/2msec/cm
PLAY(SP) VIDEO SW TRIG PLAY(EP) VIDEO SW TRIG
^ ^
(IC301-65) 2.2Vp-p (IC301-65) 2.2Vp-p
500mV/5usec/cm 500mV/5usec/cm
REC PLAY
25