Yamaha CT-7000, Руководство по обслуживанию

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CONTENTS
SPECIFICATIONS
EXTERNAL VIEWS
FRONT PANEL .
REAR PANEL (U .S. & CANADIAN MODELS)
REAR PANEL (EUROPEAN MODEL)
INTERNAL VIEWS
TOP VIEW ...... .
BOTTOM VIEW ... .
CIRCUIT DESCRIPTION ..
PARTIAL DISASSEMBLY .
DIAL MECHANISM .....
.
MEASUREMENT AND ADJUSTMENT
PRINTED CIRCUIT BOARD ........
.
BLOCK DIAGRAM .................................
.
OVERALL SCHEMATIC DIAGRAM.. . .
.
. .
. . .
.
. .
. ....
.
PARTIAL CHANGES MADE ACCORDING TO DESTINATION
PARTS LIST .................................
.
SPECIFICATIONS
Tuning Range
88-108MHz
Sensitivity (mono)
IHF
Normal: better than 2.5;LV
Wide: better than 3.2/lV
DIN (40kHz Dev.; S/N 26dB)
Normal: better than 1.6/lV
Wide: better than 2.5/lV
Sensitivity (stereo)
DIN (40kHz Dev.; S/N 46dBI
50/lV
Image
Frequency Rejection
Over 120dB
IF
Rejection
Over 120dB
Spurious Response Rejection
Over 120dB
AM Rejection
IHF Over 60dB
Capture Ratio
1 mV Normal: better than 1.3dB
Wide: better than 1.0dB
1 OllV Normal: better than 2.0dB
Wide: better than 3.0dB
1 OOmV Normal: better than 1.0dB
Wide: better than 1.0dB
Selectivity
IHF (75kHz Dev.)
Normal: over 80dB
Wide: over 18dB
DIN (±300Hz; 40kHz Dev.) ±500kHz
Normal: over 65dB
Wide: over 1 OdB
Normal: over 90dB
Wide: over 35dB
Signal/Noise Ratio (mono)
IHF (75kHz Dev.)
Over 78dB
DIN (40kHz Dev.)
Over 72dB
Signal/Noise Ratio (stereo)
IHF (75kHz Dev.)
Over 75dB
DIN (40kHz Dev.)
Over 69dB
Total Harmonic Distortion
(antenna level: 1 mV)
Mono
IHF (400Hz; 75kHz Dev.)
Normal: less than 0.08%
Wide: less than 0.08%
DIN (1kHz; 40kHz Dev.)
Normal: less than 0.08%
Wide: less than 0.08%
IHF (50-1 O,OOOHz; 75kHz Dev.)
Normal: less than 0.3%
Wide: less than 0.15%
DIN (50-10,000Hz; 40kHz Dev.)
Stereo
Normal: less than 0.3%
Wide: less than 0.15%
IHF (400Hz; 75kHz Dev.)
Normal: less than 0.08%
Wide: less than 0.08%
DIN (1kHz; 40kHz Dev.)
Normal: less than 0.08%
Wide: less than 0.08%
IHF (50-10,000Hz; 75kHz Dev.)
Normal: less than 0.5%
Wide: less than 0.2%
DIN (50-10,000Hz; 40kHz Dev.)
Normal: less than 0.5%
Wide: less than 0.2%
Stereo Separation
IHF (400Hz; 75kHz Dev.)
Normal
&
wide: 50dB
DIN (1kHz; 40kHz Dev.)
Normal
&
wide: 50d8
IHF (50-10,000Hz; 75kHz Dev.)
Normal: 35dB
Wide: 40dB
DIN (50-10,000Hz; 40kHz Dev.)
Normal: 35dB
Wide: 40dB
Frequency Response
50-10,000Hz
±0.3dB
30-15,000Hz
+0.5dB, -1.0dB
Sub-Carrier Suppression
Over 70dB
Muting Override Signal Level
3-30!-lV
Stereo Level 3-30/lV
Auto Blend Level
1: 1 OO;.t V, II: 1m V
GENERAL
Transistors
1 08
FETs 12 (dual-gate MOS: 3,
junction:
9)
Diodes
33
Zener Diodes
9
ICs 7
Two-Element Ceramic Filter
2
2
2
4
4
5
14
17
18
22
26
27
29
31
Four-Element Ceramic Filter
1
Two-Element Ceramic Block Filters 2
Headphone Output
4.16n.
Fixed Output
775mV
Variable Output
2V- 70mV variablao
Antenna Input Impedance
Power Source
300n. (balanced),
75n. (unbalanced)
110, 117, 130, 2 20, 240V,
50/60Hz
Power Consumption
23W
(
i
l
i
u
m . off:
13W)
AC Outlet
1 (unswitched, 500W)
Cabinet
American walnut
Front Panel Hairline brushed aluminum
Dimensions
(WxHxDI
436
x
1 4 4
x
352mm
(17.2"
X
5.7"
X
13.9")
Weight
13kg (28.6 lbs.)
CT
-
7000
1