![Sanyo VHR-M261EV Скачать руководство пользователя страница 8](http://html.mh-extra.com/html/sanyo/vhr-m261ev/vhr-m261ev_service-manual_364515008.webp)
1-4
• The Contents of Examination
As all the IC that is applied to VCR is controlled by IIC, mutual communication, if Vcc of IC is short or open
with detecting ‘Acknowledge’ data of the specific IC according to each power(5V, 5VT) µ-COM gets unable to
detect ‘ACK’ data.
µ-COM regards this case as abnormal one and if it can’t detect ‘ACK’ data for a certain time(3.5 sec) the sig-
nal of ‘Power Control’ and ‘Timer Control’ are switched to ‘Low’. As a result POWER Switching TR is kept from
generating heat and fire.
• POWER for each IC
S/
5V POWER
SECAM IC
Series 5VT POWER
AVCP IC
P/Y/I
5V POWER
Modulator
Series 5VT POWER
AVCP IC
*Short protection off mode : DJ01 Diode in
PROPOSAL FOR APPLYING SHORT PROTECTION
IIC BUS
5VT SW
POWER
CONTROL
MASTER
TIMER
CONTROL
5VT SW
SLAVE with 5V
SLAVE with 5V
5.3VA
Timer Control
AVCP IC
TUNER
OSD
VPS IC
SECAM IC
Conception
BLOCK Diagram
5.2V
5.2VT
• IC to detect ‘ACK’ data is selected as below because IC is different in accordance to region and option
5.3VA
Power Control
Modulator
Hi-Fi IC
NICAM IC
Содержание VHR-M261EV
Страница 33: ...3 19 3 20 2 Tu IF NICAM A2 Block Diagram From Power WITHOUT ...
Страница 35: ...4 System Block Diagram 3 23 3 24 ...
Страница 41: ...5 SHUTTLE KEY Circuit Diagram 3 37 3 38 ...
Страница 43: ...3 41 3 42 2 KEY 1 P C Board LOCATION GUIDE Solder Side 3 KEY 2 P C Board LOCATION GUIDE Solder Side ...
Страница 88: ...70 V P V ...