JVC AV-56WP30 Service Manual page 52

AV-56WP30
Indication
XRAY X-ray radiation protection
OCP B1 over-current protection
LOB Low B short protection
TIM Timer
SYNC Pres ence or absence of
synchronized signal
MEM Memory (EEP-ROM)
AVSW AV switch
VCD Video / chroma process
(RGB proc ess)
BS Broadcas t satellite tuner
AIO Audio proces s
(MTS dec ode / audio c ontrol)
YC 3D YC s eparation
TUN RF tuner
GCR Ghost reduction
PP Picture & Pic ture
(Multi-screen)
IP I-P c onversion
(DSD : enhancer)
52
Check item Details of detection
Operation of X-ray
protection circuit.
An B1 over-current is
detected.
Operation of low B short
protection circuit.
The AC power frequency is
changed as follows :
50Hz→ 60Hz
60Hz→ 50Hz
Pres ence of synchronized
signal.
HD : HD signal
M : NTSC main signal
S : NT SC sub signal
* AN5392FBQ
ACK is returned when I
traffic is carried out.
Ditto
MM1519XQ and CXA2069Q
Ditto
AN5392FBQ
Not used
Ditto
UPC1851BCU
Ditto
UPD64083GF
Ditto
Main & sub RF tuner
Not used
Ditto
TMS57128GJG
Ditto
JCC5054
At about 3 s econds after the power is turned on, the
self-check function starts. If NG is detected for 200ms,
the power is turned off automatically.
At about 3 s econds after the power is turned on, the
self-check function starts. If NG is detected for 200ms,
the power is turned off automatically.
At about 3 s econds after the power is turned on, the
self-check function starts. If NG is detected for 200ms,
the power is turned off automatically.
Periodically check the power frequenc y by counting the
AC puls e and monitor whether or not the frequency is
changed except for the time immediately after resetting.
When entering the s elf-c hec k mode, "OK" is shown.
While running the mode with picture signal, if the
synchronized signal is dis appeared, "NG" is shown.
2
C The state is monitored every time when I
carried out. Then the state is c ounted as a failure if ACK
is not returned.
No. 52007
Method of detection
2
C traffic is
Ditto
Ditto
Ditto
Ditto
Ditto
Ditto
Ditto