Adjustment - Sharp QT-CD210 Service Manual

QT-CD210/C
MECHANISM SECTION
• Driving Force Check
Torque Meter
PLAY: TW-2412
• Torque Check
Torque Meter
Play: TW-2111
Fast Forward: TW-2231
Rewind: TW-2231
• Head Azimuth
Torque Meter
MTT-114
• Tape Speed
Adjusting
Test
Point
Tape
MTT-111 Variable
resistor in
motor. (M601)
TAPE SECTION
Position of each switch or control
Volume control
Function switch
• Bias Oscillation
Adjustment Point Specified Value
L301 82 kHz
• Playback Amplifier Sensitivity Check
Test Tape Specified Value
MTT-118 1.1 V 3 dB
TUNER SECTION
fL: Low-range frequency
fH: High-range frequency
• FM IF/RF
Test Stage Specified
Value/Adjusting
FM Detection T2
FM fL: L2
Band Coverage fH: TC2
FM Tracking fL: 88.0 MHz: L1
fH: 108.0 MHz: TC1
Specified Value
Over 120 g
Specified Value
25 to 65 g.cm
60 to 130 g.cm
60 to 130 g.cm
Specified Value
Output: Speaker Terminal
(CNP201 Load resistance: 4 ohms)
Specified Instrument
Value Connection
3,000 90 Hz Output: Speaker
Teaminal
(CNP201 Load
resistance: 4 ohms)
Max
Tape/Power Off
Instrument
Connection
6 kHz Pin 1 of CNP101
Instrument Connection
Speaker Terminal
(Load resistance: 4 ohms)
Instrument
Connection
Point
Input: Pin 1 of IC1
Output: Pin 18 of IC1
Iuput: Antenna
Output: Speaker
Terminal (CNP201
Load resistance: 4
ohms)

ADJUSTMENT

• AM IF/RF
Test Stage
AM IF
AM
Band Coverage
AM Tracking
FM ROD
ATENNA
MAIN PWB
FM
DETECTION
L3
AM BAR
ANTENNA
– 6 –
Specified
Value/Adjusting
Point
T3
fL: L4
fH: TC4
fL: 600 kHz: L3
fH: 1,400 kHz: TC3
CNP101
4 3 2
SW102
L301
BIAS OSC.
11
IC101
12 2
1
CNP602
IC803
T2
AM IF
T3
FM BAND
12 1 COVERAGE
IC1 fL fH
fH
13
24
18
fL
TC2
L2
TC4
L1
L4
TC1
TC3
fH AM
TRACKING
fL
fH
fL
AM BAND
COVERAGE
Figure 6 ADJUSTMENT POINTS
Instrument
Connection
Input: Antenna
Output: Pin 18 of IC1
Input: Antenna
Output: Speaker
Terminal (CNP201
Load resistance: 4
ohms)
1
1
CNP201
1 2 3
VR201
SW201
FM
TRACKING