CCE HPS-2185FS Manuale utente
Service Manual
Model HPS-2185FS
Customer: Makro
Code: 1.01.72505.59
_____________________________________
Approved Signature
HPS-2185FS
INDEX
1. PRODUCT SPECIFICATION
2. PACKAGING BOX
3. TECHNICAL SPECIFICATION
4. CALIBRATION SCRIPT
5. MATERIAL LIST
6. ELECTRICAL SCHEME
6.1 MAIN AND REMOTE CONTROL PCB
7. SILKTOP AND SOLDERS
7.1 MAIN PCB
7.2 REMOTE CONTROL PCB
8. EXPLODED VIEW
9. BLOCK DIAGRAM
HPS-2185FS
3. TECHNICAL SPECIFICATION
Procedure to check up color TV electrical parameters
3.1 AUDIO
3.1.1 Output Power at 10% THD
1omethod: antenna input connection
a) TV setup in “PP” condition (frequency and channel factory defined)
b)Apply 60dBµV signal to antenna input, modulated with white pattern in 88%
and audio signal with 400Hz frequency modulated in FM with ± 25kHz
deviation.
c) Connect to the audio power amplifier output a resistive load with equivalent
Ohm value of speaker used on the tested TV.
d)Connect a AC Voltmeter/Distortion Meter to the resistive load and increase
volume control until Distortion Meter reading be 10%.
e) Measure voltage on the resistive load and calculate power through next
equation:
P = (V²/R)
Where “V” is voltage in VOLTS, “R” is resistive load in OHMS e “P” is power
in WATTS.
2nd method: connection through external video and audio input
a) TV setup in “PP” condition.
b)Connect a color bar generator (PAL-M system) to video input.
c) Connect an audio generator with 500mVAC level and 400Hz sinusoidal
frequency to audio input.
d)Connect to the power amplifier output a resistive load with equivalent Ohm
value of speaker used on the tested TV.
e) Connect a AC Voltmeter/Distortion Meter to the resistive load and increase
volume control until Distortion Meter reading be 10%. Measure voltage on
the resistive load and calculate power through next equation:
P = (V²/R)
Where “V” is voltage in VOLTS, “R” is resistive load in OHMS and “P” is power
in WATTS.
Minimum Nominal Maximum Unit
2,00 2,50 3,50 W
3.1.2 Audio Residual
a) TV setup in “PP” condition.
b)Apply 60dBµV signal (frequency and channel factory defined) to antenna
input modulated with white pattern at 87,5% and audio signal with 400Hz
frequency modulated in FM with 25kHz deviation.
HPS-2185FS
c) Connect an oscilloscope to power amplifier output (connect for the
speaker).
d)Adjust volume to minimum.
e) Use the oscilloscope to measure peak-to-peak voltage, in Volt peak-to-peak
(Vpp).
Minimum Nominal Maximum Unit
-25,00 500,00 mVpp
3.1.3 Audio frequency response in TV’s without tone control
a) TV setup in “PP” condition.
b)Connect a color bar generator (PAL-M system) to video-in.
c) Connect to the audio input TV -an audio generator adjusts to 500 mVac
level, and sine wave 1kHz.
d)Connect to the output power amplifier a resistive load with the same value
of the impedance speaker.
e) Connect an AC voltmeter over the resistive load and adjust volume control
until obtain 1 Vac).
f) Realign the audio generator to 100 Hz sine wave at the same level (500
mVac).
g)Read the new voltage in the resistive load and calculate the change in dB
through next equation:
A(100Hz)=20 log(VLF /VREF)
The result is defined in“Decibel units “
h)Readjust the audio generator frequency to 10 kHz at the same level.
i) Read the new voltage Vh at the resistive load and calculate the change in
dB through the next equation:
A(10kHz)=20log(VHF/VREF)
Condition Minimum Nominal Maximum Unit
100Hz n/a n/a n/a dB
10kHz n/a n/a n/a dB
3.1.4 Audio frequency response for the stereo television set with tonality
control
a) Repeat the above procedures (item 1.3) for the following additional
conditions:
HPS-2185FS
Condition Minimum
Nominal
Maximum Unit
Bass control in max. position 100Hz ---dB
Treble control in the meddle.10kHz ---dB
Bass control in the min position.
100Hz ---dB
Treble control in the meddle.10kHz ---dB
Bass contr. in the meddle post..
100Hz ---dB
Treble control int the min pos.. 10kHz ---dB
Bass contr. in the meddle pos. 100Hz ---dB
Treble contr in the max. pos.. 10kHz ---dB
3.1.5Channel separation in Stereo reception for the stereo television set
a) TV setup in PP condition.
b)Apply a 60dBµV signal (frequency and channel factory defined) with 88%
video modulation and audio stereo carrier modulation within the standard
“MTS” (BTSC).
c) Connect an AC double voltmeter at the audio output L-R.
d)Adjust the volume control to max. and the tremble, bass and balance to
middle position.
Note:
üDisconnect the speakers for more comfortable work.
e) Adjust the stereo generator for left channel only –with 30% modulation of
300 Hz sine wave and 7.5 kHz deviations.
f) Read the Double Voltammeter value Vac corresponding of Left and Right
channel and calculate the stereo separation trough the equate:
Sep (300Hz) L→R = 20 log (VL/VR)
g)Adjust the stereo generator for left channel only –with 30% modulation of
3kHz sine wave and 7.5 kHz deviations. Calculate the separation trough the
equate:
Sep (3kHz) L→R = 20 log (VL/VR
i) Repeat the procedures e, f, g, however selecting only the right channel with
300Hz and 30% modulation and immediately the right channel with 3kHz
and 30% modulation and calculate the separation in 300Hz and 3kHz
trough the expression :
Sep(300Hz) R→L=20 log (VR/VL)
Sep(3kHz) R→L=20 log (VR/VL)
Condition Minimum Nominal Maximum Unit
Sep(300Hz) L →R15 21 -dB
Sep(3kHz) L→R15 18 -dB
Sep(300Hz) R→L15 21 -dB
Sep(3kHz) R→L15 19 -dB
HPS-2185FS
3.1.6 Nível de saída e distorção do sinal S.A.P.
a) TV setup in PP condition.
b)Apply a 60dBµV signal (frequency and channel factory defined) with 88%
video modulation, and Stereo / S.A.P audio signal carrier in accordance of
standard “MTS” (BTSC).
c) Connect an AC volt distortion meter at the left channel output.
d)Adjust the volume control to max. and the tremble, bass and balance to
middle position.
Note:
üDisconnect the speakers for more comfortable work.
e) Adjust the Stereo/SAP generator for 400 Hz sine wave and 100%
modulation.
f) Active the SAP function in the Test Television.
g)Read Vac at the AC volt-distortion-meter.
h)Repeat all above procedures, connecting the volt-distortion-meter at the
Right channel.
Minimum Nominal Maximum Unit
Output level 450 500 550 VAC
Distortion (THD) 0,2 1,0 1,5 %
3.1.7 AM Rejection
a) TV setup in PP condition.
b)Connect at the IF sound input a FM generator adjust to 4.5 MHz modulated
with 400 Hz sine wave and +/-25 kHz deviation and 90 dBuV level.
c) Connect an AC voltmeter in the audio detector output (after the emphasis
circuit) and read the VFM tension.
d)Connect at the IF sound input a AM generator pre-adjust to 4.5 MHz 30%
modulated with 400 Hz sine wave, and 90 dBuV level.
e) Read the Vam value in the voltmeter.
AM rejection will now be calculated by the equation:
RejAM = 20 log( VFM/VAM)
Note:
üBecause this parameter is designed to define only the one circuit TV perform,
the startup conditions adjust and what’s circuits will be supplied, it will be
defined separately for each one model.
Minimum Nominal Maximum Unit
40,00 50,00 -dB
Indice
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