Chapter 2. Adjustments; Adjustment - Sharp XL-MP80H Service Manual

XL-MP80H/MP80E
E Market XLMP80H Service Manual XL-MP80H/MP80E Audio
CHAPTER 2.
ADJUSTMENTS

[1] ADJUSTMENT

1. MECHANISM SECTION
• Driving Force Check
Torque Meter
Play: TW-2111 Over 80 g
• Torque Check
Torque Meter
Play: TW-2111 30 to 80 g.cm
Fast forward: TW-2231 70 to 180 g.cm
Rewind: TW-2231 70 to 180 g.cm
• Tape Speed
Test Tape Adjusting Specified
Point
MTT-111 Variable 3,000 ± 30 Hz
Resistor in
motor.
Specified Value
Specified Value
Instrument
Value Connection
Speaker Ter-
minal (Load
resistance: 6
ohms)
MAIN PWB
W302
X351
9 8
10 7
11 6
W302
12 5
13 4
14 3
15 2
L305
16 1
CF303
AM IF
Figure 2 ADJUSTMENT POINTS
2. TUNER SECTION
fL: Low-range frequency
fH: High-range frequency
• AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
Test Stage Frequency
IF 450 kHz
AM Band —
Coverage
AM Tracking 990 kHz
*1. Input: IC301 1Pin
*2. Input: Input is not connected
*3. Input: Antenna
W303
TP301
L311
C321
23
W303
L306
AM BAND
COVERAGE fL
W301
AM
Tracking
L302
CF304
CF301
2 – 1
TAPE MECHANISM
M501
Tape
Motor
Variable
resistor
in motor
Figure 1
Frequency Setting/
Display Adjusting
Parts
1,602 kHz L305
522 kHz (fL): L306
1.1 ± 0.1 V
990 kHz L302
Output: IC301 23Pin
Output: TP301(IC301 28Pin)
Output:IC301 23Pin
J301
FM ANTENNA
75 OHMS
CNP301
2
AM LOOP ANTENNA
1
J102
VIDEO/AUX
IN
LEFT
RIGHT
Instrument
Connection
*1
*2
*3