RX-777
RX-777
6
■
AMP ADJUSTMENTS
Confirmation of Idling Current
• Right after power is turned on, confirm that the voltages of between R111-R135 and R112-R136 are between 0.1mV and
10mV.
• If they exceed 10mV, cut R175, R176. Then reconfirm they are between 0.1mV and 10mV.
Note)
• If R175 (L ch) or R176 (R ch) have already been cut off and idling current does not flow, reconnect R175 (1k
Ω
) or R176 (1k
Ω
).
• Q117 and Q118 are transistors for temperature correction. Apply silicone grease to the contact surface with the heat sink.
R111
R175
R176
R135
L ch
0.1mV ~ 10.0mV
(DC)
R112
R136
R ch
0.1mV ~ 10.0mV
(DC)
R175 (L ch)
R176 (R ch)
Cut off
■
TEST MODE
CAUTION: Before setting to the TEST mode, write down the existing preset memory content of the Tuner in a table as
shown below. (This is because setting to the TEST mode will cause the memory content to be as factory set,
i.e., all the preset memory by the user will be erased.)
Preset group
P1
P2
P3
P4
P5
P6
P7
P8
A
B
C
D
E
Preset group
P1
P2
P3
P4
P5
P6
P7
P8
A/C/E
U, C
87.5 MHz
90.1 MHz
95.1 MHz
98.1 MHz
107.9 MHz
88.1 MHz
106.1 MHz 107.9 MHz
A
87.5 MHz
90.1 MHz
95.1 MHz
98.1 MHz
108.0 MHz
88.1 MHz
106.1 MHz 108.0 MHz
B/D
U, C
630 KHz
1080 KHz
1440 KHz
530 KHz
1710 KHz
900 KHz
1350 KHz
1400 KHz
A
630 KHz
1080 KHz
1440 KHz
531 KHz
1611 KHz
900 KHz
1350 KHz
1404 KHz
●
Factory preset memory content
