OPERATION CHECK-3
OUTPUT LEVEL & THERMAL DETECTION
HT-R8230
P6301
COM
TH1
TH2
7
25
25
27
27
27
27
25
25
12
12
25
25
17
15
12
20
12
12
22
25
17
17
17
15
17
15
15
12
12
20
17
17
25
22
15
20
17
12
27
25
17
20
20
12
25
22
17
17
15
20
15
22
15
20
12
17
17
20
20
22
17
30
27
30
30
7
7
15
15
7
30
7
7
7
20
20
25
30
7
30
22
20
12
12
25
30
27
20
30
7
12
22
12
12
12
12
15
15
7
25
25
20
25
U16
NAAF-8245
POWER AMPLIFIER PC BOARD
P6301
TH1
COM
Front side
2.7 kohms
1W
Output level detection
1. Set the unit to test mode
" Test-3-2 "
1-1. Press and the hold down the
CD
button , then press the
STANDBY/ON
button when the unit is Power ON.
1-2. Press the
VIDEO 2
button, while the display of
" Test - _ "
has come out.
Unit will be in the state of "
Test-3-00
".
1-3. Repeat and press
SPEAKERS B
until the display of
" Test-3-2 "
comes out.
2. Apply signal (sine wave 1kHz, -1.5dBV) to MULTI CHANNEL (FL, FR, SL, SR, C) terminal, each channel.
3. Check that
FM STEREO
indicator is display come out.
6. Press the
STANDBY/ON
button, and exit from test mode.
T e s t - _
T e s t - 3 - 0 0
T e s t - 3 - 0 2
T e s t - 3 - 0 2
FM STEREO
FM STEREO
Thermal detection
1. Set the unit to test mode
" Test-3-2 "
Refer to the clause of "Output level detection".
2. Connect the resistor 2.7 kohms /1W between
" HT1 "
and
" COM "
terminals of
P6301
.
3. Check that
FM STEREO
indicator is display come out.
6. Press the
STANDBY/ON
button, and exit from test mode.
T e s t - 3 - 0 2
FM STEREO
FM STEREO
<Check by test mode>
The following is the procedure of checking detection operation of a microprocessor in false, by using test mode.
