Sharp WF-930ZBK - Adjustment

WF-930Z
ADJUSTMENT
MECHANISM SECTION
Play: TW-2412 Tape 1: Over 50g
Tape 2: Over 60 g
Torque Meter
Specified Value
• Driving Force Check
Specified Value
Torque Meter
• Torque 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
• Head Azimuth
MTT-114 Headphones Socket
(Load resistance: 32 ohms)
Test Tape
Instrument Connection
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)
Specified Value
MTT-118 1.3 V ± 3 dB Speaker terminal
(Load resistance: 3 ohms)
Volume control Max
Beat cancel A
Function/Power Tape/Stand-by
Dubbing speed/Built-in Microphone OFF/Mic 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
– 6 –
TUNER SECTION
fL: Low-range frequency
fH: High-range frequency
• AM IF/RF
Specified
Value/Adjusting
Point
Test Stage
Instrument
Connection
IF T3 Input: Antenna
Output: Pin 3 of IC2
MW Band fL: L6
Coverage fH: TC8
MW Tracking fL (600 kHz):
L3 (MW)
fH (1,400 kHz):
TC7
SW1 Tracking fL (2.6 MHz):
L4 (SW1)
fH (6.0 MHz):
TC2
SW1 Band fL: L7
Coverage fH: TC4
SW2 Band fL: L8
Coverage fH: TC3
SW2 Tracking fL (8.5 MHz): L5
fH (19 MHz): TC1
Instrument
Connection
Specified
Value/Adjusting
Point
IF T1
Detection T2
Band Coverage fL: L2
fH: TC6
Test Stage
Input: Antenna
Output: Pin 1 of IC1
• FM IF/RF
Tracking fL (88.0 MHz):
L1
fH (108.0 MHz):
TC5
Instrument
Connection
Specified ValueTest Stage
VR1 76 kHz ± 200 Hz Pin 13 of IC2
• VCO Frequency
Instrument Connection
Tape 1 Tape 2
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