Chapter 2. Adjustments; Test Mode - Sharp HT-M700H Service Manual

HT-M700H
HT-M700H
CHAPTER 2.
ADJUSTMENTS
[1] Tuner section
fL: Low-range frequency
fH: High-range frequency
• AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
Test Frequency Frequency
Stage Display
AM IF 450 kHz 1,620 kHz
AM Band – 522 kHz
Coverage
AM 990 kHz 990 kHz
Tracking
*1. Input: Antenna Output: TP302
*2. Input: Antenna Output: TP301
NOTE:
1. Description of the "FM IF Adjustment" is not carried on this manual.
It is Because the IF coil in the FM FRONT END section has been
best adjusted in the factory so that its further adjustment is not
needed at the field. When replacing the FM FRONT END assem-
bly, no adjustment is needed either.
2. The parts in the FM FRONT END section are prepared in a com-
plate unit, so you can't obtain each part individually.
TUNER PWB
VR351 T351
VCO
T302 T306
AM AM BAND
TORACKING fL COVERANGE fL
Figure 1 Adjustment Points
Setting/ Instrument
Adjusting Connection
Point
T351 *1
(fL): T306 *2
1.1 ± 0.1 V
(fL): T302 *1
AM IF
Service Manual

[2] TEST Mode

Before enter TEST MODE, please do 'PANEL DOOR OPEN POWER
OFF': hold down 'PANEL DOOR CLOSE', then press 'ON/STAND-BY'
button to turn on the power of unit.
After aboveoperation, panel door will open and enter stand-by mode
automatically.
1. TUNER TEST ("TUNER" + "STOP" + 'ON/
STANDBY')
INITIAL SETTINGS:
VOLUME = 20
FUNCTION = FM ST 87.50 MHz (P-01)
P-01: FM ST 87.50 MHz
P-02: FM ST 108.00 MHz
P-03: FM ST 98.00 MHz
P-04: FM ST 90.00 MHz
P-05: FM ST 106.00 MHz
P-06: AM 522 kHz
P-07: AM 1620 kHz
P-08: AM 990 kHz
P-09: AM 603 kHz
P-10: AM 1404 kHz
P-36: FM MONO 106.00 MHz
P-37: FM MONO 90.00 MHz
P-38: FM MONO 98.00 MHz
P-39: FM MONO 108.00 MHz
P-40: FM MONO 87.50 MHz
"STOP" BUTTON: TUNING DOWN
"PLAY" BUTTON: TUNING UP
"SKIP DOWN" BUTTON: TUNER PRESET DOWN
"SKIP UP" BUTTON: TUNER PRESET UP
2. VOLUME TEST ("SKIP DOWN" + "STOP" + 'ON/
STAND-BY')
INITIAL SETTINGS:
VOLUME = 23
FUNCTION = AUX DISITAL
FM ST FREQUENCY = 87.50 MHz
FM MONO FREQUENCY = 87.50 MHz
AM FREQUENCY = 522 kHz
VOLUME 0 >> VOLUME 1 >> VOLUME 23 >> VOLUME 40 >> VOL-
UME MAX
3. KEY TEST ("SKIP UP" + "PLAY" + 'ON/STANDBY')
Press each button of main unit except "ON/STAND-BY" button, and
then press "ON/STAND-BY" button.
KEY OK: 'OK' SHOWN ON VFD
KEY NG: 'ERROR' SHOWN OF VFD
Every press of key, VFD will display name of pressed button.
4. VFD TEST ("SKIP UP" + "STOP" + 'ON/STANDBY')
Use "SKIP UP" button to change VFD display mode.
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