The service manuel is very helpful, we where able to restore the device to its working operation again.
Text excerpt from page 12 (click to view)
KRF-V7772D/VR-3080
ADJUSTMENT
No. ITEM INPUT SETTINGS SELECTOR : FM (A) 98.0MHz 1kHz, ±40kHz dev. 70dBf (ANT. input) (A) 98.0MHz 1kHz, ±40kHz dev. MONO 70dBf (ANT. input) (C) 98.0MHz 1kHz, ±40kHz dev. Selector : L or R Pilot : ±6kHz dev. 70dBf (ANT. input) (A) 98.0MHz MONO 1kHz, ±40kHz dev. 25dBf (ANT. input) OUTPUT SETTINGS RECEIVER SETTINGS ALIGNMENT POINTS ALIGN FOR F I G . FM SECTION : *Adjust NO.1 and NO.2 repeat. Connect a DC voltmeter between CN2 1 and CN2 2 (X05) MONO 98.0MHz L4 (X05-)
1
DISCRIMINATOR
0V
(a)
2
DISTORTION (MONO)
(B)
MONO 98.0MHz
L5 (X05-)
Minimum distortion
(a)
3
DISTORTION (STEREO)
(B)
AUTO 98.0MHz
IFT(RF FRONTEND : A1) (X05-)
Minimum distortion (L or R)
(a)
4
TUNING LEVEL
(B)
MONO 98.0MHz
VR1 (X05-)
Adjust VR1 and stop at the point where ED1 (TUNED) goes on.
(a)
AUDIO SECTION
<1>
IDLE CURRENT
SPEAKER : A PREOUT : OFF PROLOGIC : ON Connect a DC voltmeter across VR1(L) each T.P. CN21 : L VR2(R) (FRONT 2ch VR5(LS) CN22 : R � MODE) 10mV VR4(RS) CN23 : LS Volume:0 VR3(CENTER) CN24 : RS CN25 : C (X09-) (X09-)
SYSTEM CONNECTIONS
S VIDEO PRE OUT FRONT SURROUND CENTER
MONITOR OUT
VIDEO1 VIDEO2 VIDEO3 VIDEO4 REC PLAY PLAY PLAY PLAY OUT IN IN IN IN
DIGITAL IN VIDEO2 VIDEO3 VIDEO4 CD1
IR RECEIVER IN
IR OUT LCD
IR REPEATER OUT
DC12V 15mA REMOTE
SYSTEM SL16 CONTROL TEXT
SL16 XS8
OPTICAL OPTICAL COAXIALCOAXIAL
SUBWOOFER
VIDEO AUDIO FRONT SPEAKERS (6-16�)
SURROUND SPEAKERS
