Read Sharp WQ-CD60H (serv.man2) Service Manual online
WQ-CD60H
– 9 –
MECHANISM SECTION
E
Frequency
Adjusting
Parts
Frequency Display
Without modulation VR301
456 kHz
Instrument
Connection
Specified Value/
Adjusting
Point
Test Stage
IF
T301
Input: Pin 1 of IC301
Detection
T303
Output:Pin 11 of IC301
Band
fL: L307
Input: Antenna
fH: CT302
Output: Earphon Jack
Tracking
fL(88.0 MHz): L305
(Load resistance:
fH(108.8 MHz): CT301
32 chms)
IF
T302
Input: Antenna
Output: Pin 4 of IC301
Output: Pin 4 of IC301
MW Band
fL: L306
Input: Antenna
Coverage
fH: CT304
Output: Earphon Jack
MW
fL(600 kHz): L302(MW)
(Load resistance:
Tracking
fH(1,400 kHz): CT303
32 chms)
LW Band
fL(148.5 kHz): L309
Coverage
fH(283.5 kHz): TC304
LW
fL: L303(LW)
Tracking
fH: TC301
Test Stage
Specified Value/
Adjusting
Point
Instrument
Connection
Play: TW-2412
Tape 1: Over 50g
Tape 2: Over 60 g
Tape 2: Over 60 g
• Driving Force Check
Play: TW-2111
30 to 60 g.cm
30 to 60 g.cm
Fast forward: TW-2231
55 to 120 g.cm
80 to 135 g.cm
Rewind: TW-2231
55 to 120 g.cm
80 to 135 g.cm
Tape 1
Tape 2
• Torque Check
• Head Azimuth
MTT-114
Headphones Socket
(Load resistance: 32 ohms)
(Load resistance: 32 ohms)
Test Tape
Test Tape
• Tape Speed (Normal only)
Adjusting
Point
Specified
Value
Instrument
Connection
MTT-111
Tape 1,2: VR501 3,000
±
60 Hz
Headphones
socket(Load
resistance:
32 ohms)
socket(Load
resistance:
32 ohms)
Specified Value
MTT-118
1.4 V
±
3 dB
Speaker terminal
(Load resistance: 3 ohms)
(Load resistance: 3 ohms)
Volume control
Max
Beat cancel
A
Function
Tape
Dubbing speed/Built-in Microphone
OFF/ON
TAPE SECTION
Position of each switch or control
Specified Value
• Bias Oscillation Frequency
Test Tape
• Playback Amplifier Sensitivity Check
Beat cancel
A: 100
±
4 kHz
B: 94
±
4 kHz
C: 104
±
4 kHz
Instrument Connection
Torque Meter
Specified Value
Specified Value
Torque Meter
Instrument Connection
TUNER SECTION
fL: Low-range frequency
fH: High-renge frequency
fH: High-renge frequency
Figure 9-1 ADJUSTMENT POINTS
Figure 9-2 ADJUSTMENT POINTS
CNP504
VR501
TAPE SPEED
CNP505
DECK PWB
ADJUSTMENT
• VCO Frequency
• FM IF/RF
• AM IF/RF
L309
T301
T303
TC301
T302
L303
L302
FM BAND
COVERAGE
COVERAGE
MW TRACKING
fH
fH
FM IF
MW TRACKING
fL
fL
LW BAND
COVERAGE
COVERAGE
fH
fL LW
TRACKING
FM
TRACKING
TRACKING
fH
fL
fH
fL
fH
fL
fH
fL
MW BAND
COVERAGE
COVERAGE
LW
MW
VR301
FM DET
AM IF
VCO
TC304
CT303
L305
L307
L306
IC302
IC301
CT304
CT
301
TUNER PWB
CT302
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