Troubleshooting; Technical Data - Philips MC148/22 User Manual

TROUBLESHOOTING

WARNING
Do not open the set as there is a risk of electric
shock! Under no circumstances should you try to
repair the set yourself, as this will invalidate the
guarantee.
Problem Possible cause
No sound /power Volume not adjusted
Headphones connected
Mains lead not securely plugged to wall socket Plug in properly
No reaction to Electrostatic discharge
controls
Poor bass sound Speakers not in phase
Severe radio hum or Electrical interference: set too close to TV,
noise VCR or computer
Poor radio reception Weak radio signal
NO DISC indication CD badly scratched or dirty
CD-R(W) is blank or the disc is not finalised
Laser lens steamed up
The CD skips tracks CD damaged or dirty
SHUFFLE or PROGRAM is active
Poor cassette sound Dust and dirt on the heads, etc.
quality Use of incompatible cassette type
METAL (IEC IV)
CHECK TAPE is
Cassette tab(s) may be broken
displayed
Tape door Power supply interruption or attempt to open
will not open tape door during tape playback/recording
Remote control does Batteries exhausted
not function properly Batteries incorrectly inserted
Distance/ angle between the set too large
14
MC 148 / 22 page 14
If a fault occurs, first check the points listed below before
taking the set for repair.
If you are unable to remedy a problem by following these
hints, consult your dealer or service centre.
Remedy
Adjust the VOLUME
Disconnect headphones
Disconnect the unit from the mains supply,
reconnect after a few seconds
Connect speaker poles correctly: marked cable
to red terminal; unmarked cable to black
terminal
Increase the distance
FM: Direct the FM aerial wire for optimum
reception
Replace/ clean CD, see Maintenance
Use a finalised CD-R(W)
Wait until lens has cleared
Replace or clean CD
Switch off SHUFFLE / PROGRAM
Clean deck parts, see Maintenance
Only use NORMAL (IEC I) or CHROME (IEC II)
for recording
Apply a piece of adhesive tape over the missing
tab space
Disconnect the unit from the mains supply,
reconnect after a few seconds. Press OPEN
Insert fresh batteries
Insert the batteries correctly
Reduce the distance/ angle

TECHNICAL DATA

Amplifier
Output power . . . . . . . . . . . . . . . . . . . . . . 2 x 10 W RMS
Output power. . . . . . . . . . . . . . . . . . . . . . . . 200 W PMPO
Signal-to-noise-ratio . . . . . . . . . . . . . . . . . 65 dBA (IEC)
Input sensitivity AUX . . . . . . . . . . . . . . . . 0.5 V (max. 2 V)
Impedance loudspeakers . . . . . . . . . . . . . . . . . . . . . . 8
Impedance headphones . . . . . . . . . . . . . . . 32
Tuner
FM wave range. . . . . . . . . . . . . . . . . . . . . 87.5 - 108 MHz
MW wave range . . . . . . . . . . . . . . . . . . . . 531 - 1602 kHz
LW wave range . . . . . . . . . . . . . . . . . . . . . . 153 - 279 kHz
Sensitivity at 75
– mono, 26 dB signal-to-noise ratio . . . . . . . . . . . . 2.8 V
– stereo, 46 dB signal-to-noise ratio . . . . . . . . . . 61.4 V
Selectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 dB
Total harmonic distortion . . . . . . . . . . . . . . . . . . . . . 5%
Frequency response. . . . . . . . . . . . 63 - 12,500 Hz (± 3 dB)
Signal-to-noise-ratio . . . . . . . . . . . . . . . . . . . . . 50 dBA
CD player
Frequency range . . . . . . . . . . . . . . . . 20 - 20,000 Hz (8 dB)
Signal-to-noise-ratio . . . . . . . . . . . . . . . . . . . . . . . 75 dBA
Tape deck
Frequency response . . . . . . . . . . . . . 80 - 12,500 Hz (8 dB)
Signal-to-noise-ratio (without Dolby NR)
– Normal tape (type I) . . . . . . . . . . . . . . . . . . . . . . 50 dBA
Wow and flutter. . . . . . . . . . . . . . . . . . . . . . . 0.4% DIN
Speakers
2-Way bass reflex system
Dimensions (wxhxd) . . . . . . . . . . . . . . . . . 143 x 223 x 264
General
Dimensions (wxhxd) . . . . . . . . . . . . . . . . . 140 x 223 x 253
Weight (with / without speakers) . . . . approx 7.5 / 3.0 kg
Standby power consumption . . . . . . . . . . . . . . . . . . < 3 W
Subject to modification
-1000