Sharp XL-MP80H - Chapter 2. Adjustments; Adjustment

XL-MP80H/MP80E
2 – 1
AudioXL-MP80H/MP80EService ManualXLMP80HMarketE
CHAPTER 2. ADJUSTMENTS
[1] ADJUSTMENT
1. MECHANISM SECTION
• Driving Force Check
• Torque Check
• Tape Speed
2. TUNER SECTION
fL: Low-range frequency
fH: High-range frequency
• AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
Torque Meter Specified Value
Play: TW-2111 Over 80 g
Torque Meter Specified Value
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
Test Tape Adjusting
Point
Specified
Value
Instrument
Connection
MTT-111 Variable
Resistor in
motor.
3,000 ± 30 Hz Speaker Ter-
minal (Load
resistance: 6
ohms)
Figure 1
Test Stage Frequency Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
IF 450 kHz 1,602 kHz L305 *1
AM Band
Coverage
— 522 kHz (fL): L306
1.1 ± 0.1 V
*2
AM Tracking 990 kHz 990 kHz L302 *3
*1. Input: IC301 1Pin Output: IC301 23Pin
*2. Input: Input is not connected Output: TP301(IC301 28Pin)
*3. Input: Antenna Output:IC301 23Pin
TAPE MECHANISM
M501
Tape
Motor
Variable
resistor
in motor
L302
J102
J301
FE301
L311
W303
L306
CNP301
CF301
CF304
L305
CF303
W302
X351
IC351
CF302
MAIN PWB
1
2
16
9
10
11
12
13
14
15
7
6
5
4
3
2
8
1
FM ANTENNA
AM LOOP ANTENNA
VIDEO/AUX
IN
LEFT
RIGHT
75 OHMS
W302
W303
W301
AM BAND
COVERAGE fL
AM
Tracking
AM IF
C321
23
TP301
IC301
Figure 2 ADJUSTMENT POINTS