Adjustment - Sharp WF-930ZBK Service Manual

WF-930Z
MECHANISM SECTION
• Driving Force Check
Torque Meter
Play: TW-2412
• Torque Check
Torque Meter
Play: TW-2111 30 to 60 g.cm
Fast forward: TW-2231 55 to 120 g.cm
Rewind: TW-2231 55 to 120 g.cm
• Head Azimuth
Test Tape
MTT-114
• Tape Speed (Normal only)
Test Tape Adjusting
Point
Tape 1,2: VR501 3,000 ± 60 Hz
MTT-111
TAPE SECTION
Position of each switch or control
Volume control
Beat cancel
Function/Power
Dubbing speed/Built-in Microphone
• Bias Oscillation Frequency
Beat cancel
• Playback Amplifier Sensitivity Check
Test Tape Specified Value
1.3 V ± 3 dB
MTT-118
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ADJUSTMENT

Specified Value
Tape 1: Over 50g
Tape 2: Over 60 g
Specified Value
Tape 1 Tape 2
30 to 60 g.cm
80 to 135 g.cm
80 to 135 g.cm
Instrument Connection
Headphones Socket
(Load resistance: 32 ohms)
Specified Instrument
Value Connection
Headphones
socket(Load
resistance:
32 ohms)
Max
A
Tape/Stand-by
OFF/Mic ON
Specified Value
A: 100 ± 4 kHz
B: 94 ± 4 kHz
C: 104 ± 4 kHz
Instrument Connection
Speaker terminal
(Load resistance: 3 ohms)
– 6 –
TUNER SECTION
fL: Low-range frequency
fH: High-range frequency
• AM IF/RF
Specified
Value/Adjusting
Test Stage
Point
IF T3
MW Band fL: L6
Coverage fH: TC8
MW Tracking fL (600 kHz):
L3 (MW)
fH (1,400 kHz):
TC7
SW1 Band fL: L7
Coverage fH: TC4
SW1 Tracking fL (2.6 MHz):
L4 (SW1)
fH (6.0 MHz):
TC2
SW2 Band fL: L8
Coverage fH: TC3
SW2 Tracking fL (8.5 MHz): L5
fH (19 MHz): TC1
• FM IF/RF
Specified
Value/Adjusting
Test Stage
Point
IF T1
Detection T2
Band Coverage fL: L2
fH: TC6
Tracking fL (88.0 MHz):
L1
fH (108.0 MHz):
TC5
• VCO Frequency
Test Stage Specified Value
76 kHz ± 200 Hz
VR1
Instrument
Connection
Input: Antenna
Output: Pin 3 of IC2
Instrument
Connection
Input: Antenna
Output: Pin 1 of IC1
Instrument
Connection
Pin 13 of IC2