Hz
FREQUENCY COUNTER
< TUNER SECTION >
IC801
IC991
L952
L953
L941
TC942
L907
L904
L905
L902
L901
L802
CN991
IC801
CN991
TP1(24pin)
TP2
TP3
R815
TP4
R962
GND
8
pin
TUNER C.B (COMPONENT SIDE) TUNER C.B (CONDUCTOR SIDE)
L942
⑦
②
⑧
⑥
④
⑨
① ②③ ④
⑥ ⑦⑧ ⑨
⑥ ⑦⑧⑨
①
② ③④
⑤
1.CLOCK CHECK
Requirement
Measuring equipment: Frequency counter
Test point: TP1 (CL
K
), GND
(1)
Adjust the reception frequency of the main unit to 1710
k
Hz.
(2) Check that the test point frequency is 2160
kHz
±
0.045
k
Hz.
2.VT ADJUSTMENT (LW)
Requirement
Measuring equipment: Digital multi-meter
Test point: TP4 (R962), GND
Adjustment point: L942
(1) Adjust the reception frequency of the main unit to 144
k
Hz.
(2) Adjust L942 until the test point voltage (VT) is 1.3V
±
0.05V.
3.VT CHECK (MW)
Requirement
Measuring equipment: Digital multi-meter
Test point: TP4 (R962), GND
(1) Adjust the reception frequency of the main unit to 531
k
Hz.
(2) Check that the test point (VT) voltage is about 0.5V.
(3) Adjust the reception frequency of the main unit to 1602
k
Hz.
(4) Check that the test point (VT) voltage is below 8.0V.
4.VT ADJUSTMENT (FM)
Requirement
Measuring equipment: Digital multi-meter
Test point: TP4 (R962), GND
Adjustment point: L907
(
1
) Adjust the reception frequency of the main unit to 108.0MHz.
(
2
) Adjust L907 until the test point voltage (VT) is 7.0V
±
0.1V.
(
3
) Adjust the reception frequency of the main unit to 87.5MHz.
(
4
) Check that the test point (VT) voltage is about 0.5V.
V
DIGITAL MULTIMETER
TP
GND
V
DIGITAL MULTIMETER
TP
GND
V
DIGITAL MULTIMETER
TP
GND
–
52
–
TP9 12pin
TP8 11pin
TP
GND
d u
p a
t o
r
Содержание XR-EM52
Страница 31: ... 31 SCHEMATIC DIAGRAM 4 TUNER d u p a t o r ...
Страница 38: ... 38 IC BLOCK DIAGRAM d u p a t o r ...
Страница 39: ... 39 d u p a t o r ...
Страница 40: ... 40 FL 11 BT 193GNK GRID ASSIGNMENT AND ANODE CONNECTION GRID ASSIGNMENT ANODE CONNECTION d u p a t o r ...
Страница 46: ... 46 VOLTAGE CHART d u p a t o r ...
Страница 47: ... 47 d u p a t o r ...
Страница 48: ... 48 d u p a t o r ...
Страница 65: ... 65 CD MECHANISM EXPLODED VIEW 2 2 3ZG 2 A 3 6 2 5 1 9 10 4 7 8 d u p a t o r ...
Страница 73: ...2 11 IKENOHATA 1 CHOME TAITO KU TOKYO 110 8710 JAPAN TEL 03 3827 3111 9301944 9430209 921338 d u p a t o r ...