DTR-5.9
OPERATION CHECK-4
POWER SUPPLY CONTROL
T e s t - _
T e s t - 4 - 0 0
T e s t - 4 - 3 6
C l e a r
Turn off
Blinks
T e s t - 4 - 3 6
Output sensor
[When]
Same as the Current detection check on "OPERATION CHECK-3".
[Procedure]
Notes :
No output. No input.
1. Press and hold down
CD
button, then press
On/Standby
button while the unit is powered on.
"
Test - _
"
is displayed only for 5 seconds.
2. Press
Game/TV
button while
"
Test - _
"
is displayed. The unit will be in the state of
"
Test-4-00
".
3. Repeatedly press
+
(Tone)
button until
"
Test-4-36
"
is displayed.
4. At this time, confirm that the red characters of
" FM STEREO "
is displayed.
And, confirm that the relays RL6901 and RL6902 are turned off in 2 or 3 seconds.
5. Press
+
(Tone)
button then
"
Test-4-37
"
will be displayed.
6. At this time confirm that the red characters of
" FM STEREO "
is displayed.
And, confirm that the relays RL6901 and RL6902 are turned off in 2 or 3 seconds.
7. Press
On/Standby
button.
Thermal sensor
Same as the Thermal detection in "OPERATION CHECK-1".
T e s t - 4 - 3 7
Test - 4 - 36
: Front L, R, Center, Surround L ch check
T e s t - 4 - 3 7
Test - 4 - 37
: Surround L, R, Surround back L, R ch check
Condition to operate
The power supply voltage of +/-B1 u
nder the following condition.
The state of "VOLH", "T", and "VH or VL" can be confirmed on the FL display. Refer to “OPERATION CHECK-1”.
Configuration
The power supply voltage of +/-B1 for power amplifier is changed by the relays (RL6901, 6902).
< 0.33
0.33 to 1.65
5 min.
< 60
VH
VL
VL
VL
VOLH (V)
VOLH port of MPU
T ( C)
Thermal sensor
temperature
S1H+
S1H-
S1L+
S1L-
Q6707
RL6901
RL6902
D6903
D6901
+
+
+22V
+B1
-B1
FM STEREO
FM STEREO
SEC1H
Q701
MPU
(Main Microprocessor)
119
135
VOLH
To Power trans.
To Power amp.
section
THERMAL
Thermal sensor
136
FL
SR
SL
C
FR
SBL
SBR
Output sensor
RL6901, 6902
VH
: high voltage
Off
ON
VL
: low voltage
Operation of relay
Power amplifier
Q6380
1.65 <
5 sec.
VL
VL
Operation of power supply control (VH or VL)
60 <