Philips MC 148 manual Troubleshooting Technical Data, Problem Possible cause Remedy

TROUBLESHOOTING

TECHNICAL DATA

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 warranty

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 center.

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 Ω

English

Problem	Possible cause	Remedy
No sound /power	Volume not adjusted	Adjust the VOLUME
	Headphones connected	Disconnect headphones
	Power cord not securely plugged to wall outlet	Plug in properly
No reaction to	Electrostatic discharge	Disconnect the unit from the mains supply,
controls		reconnect affter a few seconds
Poor bass sound	Speakers not in phase	Connect speaker poles correctly: marked cable
		to red terminal; unmarked cable to black
		terminal
Severe radio hum or	Electrical interference: set too close to TV,	Increase the distance
noise	VCR or computer
Poor radio reception	Weak radio signal	FM: Direct the FM antenna wire for optimum
		reception
NO DISC indication	CD badly scratched or dirty	Replace/ clean CD, see Maintenance
	CD-R(W) is blank or the disc is not finalised	Use a finalised CD-R(W)
	Laser lens steamed up	Wait until lens has cleared
The CD skips tracks	CD damaged or dirty	Replace or clean CD
	SHUFFLE or PROGRAM is active	Switch off SHUFFLE / PROGRAM
Poor cassette sound	Dust and dirt on the heads, etc.	Clean deck parts, see Maintenance
quality	Use of incompatible cassette type	Only use NORMAL (IEC I) or CHROME (IEC I)
	METAL (IEC IV)	for recording
CHECK TAPE	Cassette tab(s) may be broken	Apply a piece of adhesive tape over the missing
is displayed		tab space
Tape door	Power supply interruption or attempt to open	Disconnect the unit from the mains supply,
will not open	tape door during tape playback/	reconnect after a few seconds. Press OPEN
	recording
Remote control does	Batteries dead	Insert fresh batteries
not function properly Batteries incorrectly inserted		Insert the batteries correctly
	Distance/ angle between the set too large	Reduce the distance/ angle

Impedance headphones 32 Ω -1000 Ω

Tuner

FM wave band . . . . . . . . . . . . . . . . . . . . . 87.5 - 108 MHz AM wave band . . . . . . . . . . . . . . . . . . . . . . 530- 1700 kHz Sensitivity at 75 Ω

– 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) . . . . . . . . . . . . . . . . . 155 x 220 x 220

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

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