Yamaha HTR-6050, Service Manual

Page: 21 / 87

21
RX-V561/HTR-6050
RX-V561/HTR-6050
Display
23
±
4
42
±
4
66
±
4
92
±
4
120
±
4
147
±
4
165
±
4
182
±
4
198
±
4
217
±
4
255
KEY0
SCENE 1
SCENE 2
PROGRAM <
PROGRAM >
STRAIGHT
TONE CONTROL
SEARCH MODE
FM/AM
A/B/C/D/E
SPEAKERS
(KEY OFF)
SCENE 3
SCENE 4
DIRECT
AUDIO SELECT
INPUT <
INPUT >
PRESET/TUNING <
PRESET/TUNING >
MEMORY
TUNING
(KEY OFF)
KEY1
PI: 6 DE:255 K0:254 K1:255
PI/DE
PI:
PRI (Current protection detection)
The current of the power amplifier is detected.
Normal value:
0 to 100 (Reference volt-
age: 3.3 V=255)
DE: PDET (Sub-trans power detection)
Normal value:
209 to 255 (Reference volt-
age: 3.3 V=255)
* If PRI and PDET are out of the normal value range,
the protection function works to turn off the power.
K0/K1
K0/K1:
KEY0/KEY1 (Panel key of main unit)
A/D value of the key fails to function properly
when the standard value is deviated by
±
4.
In this case, check the constant of partial
pressure resistor, solder condition, etc.
Refer to table.
(Reference voltage: 3.3 V=255)
PLDET
LIM H: 255 / L: 102
Reference voltage: 3.3 V=255
During normal operation
255
H
Value for starting limiter operation
77
L
Value for canceling limiter operation
100
H
(LIM: Limiter control)
TH: 69 PL:255
TH/PL
TH:
THM (Thermo protection detection)
The temperature of the heat sink is detected.
Normal value:
0 to 124 (Reference volt-
age: 3.3 V=255)
* If THM is out of the normal value range, the protec-
tion function works to turn off the power.
PL: PLDET (Power limiter detection)
The output voltage of power amplifier is
detected.
9. A/D DATA CHECK
This menu is used to display the A/D conversion value of the microprocessor which detects panel keys of the main unit
and protection functions in using the sub-menu.
When K0/K1 menu is selected, keys become non-operable due to detection of the values of all keys. However, it is
possible to advance to the next sub-menu by turning the VOLUME of the main unit. When using this function, note that
turning the VOLUME more than 1 click would cause the volume value to change.
During signal processing, the condition before execution is maintained.
* The figures in the diagram are given as reference only.
PD: 58 PV:119
PD/PV
PD:
PRD (Power amplifier DC protection detection)
The output of power amplifier DC (DC voltage)
is detected.
Normal value:
35 to 81 (Reference volt-
age: 3.3 V=255)
PV: PRV (Voltage protection detection)
Voltage detects: ACL, AC2, 10V, S9, +12,
-12, +5V and VP
Normal value: 84 to 153 (Reference volt-
age: 3.3 V=255)
* If PRD and PRV are out of the normal value range,
the protection function works to turn off the power.