JVC AV-21Q3/D Schematic Diagrams page 22

AV-21Q3
AV-21QMG3
AV-2115EE
REPLACEMENT OF IC301 (IF V/C DECODER)
" For the IC301(IF V/C DECODER) of this model, all data are written in the micro-computer. So, write the data in the micro-
computer (EP-ROM : memory IC) in accordance with the following procedures before starting adjustment.
PROCEDURES
(1) Turn the POWER OFF.
(2) Replace the IC301 with a new one.
(3) While pressing MENU button and VOLUME -/+ button ON the FRONT CABINET simultaneously, turn the POWER ON. When the
POWER is turned ON, the data is written in the micro-computer (EP-ROM : memory IC) immediately.
LOCATIONS OF FRONT PANEL BUTTONS AND LAMPS
1
12
2 3 4 5 6
1
2
3
4
5
6
7
7 8
8
No. 52027
MENU buttons MENU buttons
CHANNEL －/＋buttons CHANNEL ･ / ･ buttons
(MENU ･ / ･ (MENU －/＋buttons) buttons)
VOLUME －/＋ buttons VOLUME －/＋ buttons
(MENU －/＋ buttons) (MENU －/＋ buttons)
AI ECO sensor AI ECO sensor
REMOTE CONTROL sensor REMOTE CONTROL sensor
ON TIMER lamp ON TIMER lamp
POWER lamp POWER lamp
MAIN POWER button MAIN POWER button