XV-HTD330
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Protection Specifications and Service Mode
1. Specific conditions for Service Test mode
• VDET is neglected.
• XPROTECT is neglected.
• Even if the unit is urgently shut down in failure in Normal mode, you can turn it on without waiting for one minute.
2. How to enter Service Test mode
• While holding the DISK 1 key and STOP key pressed, connect AC power cord.
3. How to quit Service Test mode, and the conditions for quitting
• To quit Service Test mode, turn the power off or disconnect the AC power cord.
• When quitting Service Test mode, only data on protection in RAM are cleared.
4. Indications when Service Test mode starts
• Indications on the FL display when Service Test mode starts differ depending on whether the unit was turned off normally or if the unit
was urgently shut down because the abnormality of the power, as described below.
Protection Specifications
The system microcomputer (AF Assy IC5501) for this unit always monitors if abnormality of the power is generated, and as soon as an
abnormality is detected shuts off the power. The specifications of the microcomputer terminal for monitoring are as follows:
In abnormal conditions or in failure, the TIMER LED flashes after the power is shut off. If the power was shut off because of an
abnormality, it can be turned on by pressing the STANDBY/ON key. However, if the power was shut off because of failure, for one minute
after a shutdown the STANDBY/ON key is disabled in order to protect against possible ignition of fumes. If the AC power cord is pulled
out during this one minute of standby, when the AC power cord is reconnected, the STANDBY/ON key will still be disabled until the
remaining seconds have elapsed.
This unit has Service Test mode for analyzing the above power abnormality. Its specifications are as follows:
∗
Vdd = Approx. 5 V (depending on the unit)
5. Operations during Service Test mode
• Basically, operations in Service Test mode are the same as in Normal mode. However, to clarify that it is in Service Test mode, during
this mode, when functions are changed, the indications on the FL display become as follows:
W e l c o m e !
[After the power is turned off normally]
[After the power is shut down because of
an abnormality in the AMP system]
FL display
V o l u m e
0
FL display
S E R V I C E
P R T C T
W N G
FL display
V o l u m e
0
FL display
D V
S E R V I C E
FL display
P R T C T
E R R
V o l u m e
0
S E R V I C E
D V
S E R V I C E
DVD/CD
T X
S E R V I C E
TUNER
L 1
S E R V I C E
LINE1
D V D
P R T E C T
FL display
V o l u m e
0
FL display
D V
S E R V I C E
FL display
[After the power is shut down because of
a failure in the AMP system]
[After the power is shut down because of a failure
in the DVD system]
Name of microcomputer terminal
XPROTECT (Pin 22)
VDET (Pin 17)
Monitoring item
Abnormality of AMP-system power
Short-circuiting of the SP terminal, etc.
Abnormality of power inside the DVDM
Assy
Voltage at terminal
In normal conditions
0.71 Vdd
∗
or more
0.5 Vdd-0.85 Vdd
∗
In abnormal conditions
0.36 Vdd-0.71 Vdd
∗
In failure
0.36 Vdd
∗
or less
0.85 Vdd
∗
or more
0.5 Vdd
∗
or less
Monitoring start time
1.5 sec after power is turned on
1.5 sec after power is turned on
Time required for determining abnormality
0.5 sec after detection
0.5 sec after detection
[Functions]
[Indications on the FL display]
L 2
S E R V I C E
LINE2
T V
S E R V I C E
TV
[Functions]
[Indications on the FL display]
www. xiaoyu163. com
QQ 376315150
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
