Sharp HT-M700H (serv.man5) Service Manual ▷ View online
HT-M700H
2 – 1
HT-M700H
Service Manual
CHAPTER 2.
ADJUSTMENTS
[1] Tuner section
fL: Low-range frequency
fH: High-range frequency
• AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
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.
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.
[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.
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.
automatically.
1. TUNER TEST (“TUNER” + “STOP” + ‘ON/
STANDBY’)
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’)
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
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.
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.
Test
Stage
Frequency
Frequency
Display
Setting/
Adjusting
Point
Instrument
Connection
AM IF
450 kHz
1,620 kHz
T351
*1
AM Band
Coverage
Coverage
–
522 kHz
(fL): T306
1.1
1.1
± 0.1 V
*2
AM
Tracking
Tracking
990 kHz
990 kHz
(fL): T302
*1
*1. Input: Antenna Output: TP302
*2. Input: Antenna Output: TP301
*2. Input: Antenna Output: TP301
Figure 1 Adjustment Points
SO302
AM
ANTENNA
TERMINAL
IC301
SO301
FM
ANTENNA
TERMINAL
VR351 T351
T306
T302
TUNER PWB
VCO
AM IF
AM BAND
COVERANGE fL
AM
TORACKING fL
HT-M700H
2 – 2
5. DVD RESTORE (“PLAY” + “FUNCTION” + ‘ON/
STAND-BY’)
STAND-BY’)
DVD SETUP SETTINGS RESTORE
AMP SETUP SETTINGS RESTORE
SOUND MODE SETTING RESTORE
ERRASE ALL OF CONTENTS OF PROGRAM PLAYBACK LIST
SHOW DVD ROM DATA VERSION NUMBER ON VFD
6. SYSTEM RESTORE (“STOP” + “FUNCTION” +’ON/
STAND-BY’)
STAND-BY’)
ERRASE ALL OF CONTENTS OF TUNER MEMORY
RESET TUNER PRESET FLAG
SET INITIAL VOLUME TO 20
SET INITIAL FUNCTION TO DVD/CD
SET FM ST FREQUENCY TO 87.50 MHz
SET FM MONO FREQUENCY TO 87.50 MHz
SET AM FREQUENCY TO 522 kHz
7. DVD MECHA + PANEL DOOR TEST (“SKIP
DOWN” + “PLAY” + ‘ON/STAND-BY’)
DOWN” + “PLAY” + ‘ON/STAND-BY’)
PANEL DOOR OPEN
→ MECHA OPEN → MECHA CLOSE →
PANEL DOOR CLOSE
ABOVE OP OK
VFD WILL DISPLAY TIMES TO DO THIS OPERATION.
Display
