Philips n 4506 service manual

Page 1

emcee;

Recorders N4506/ 00/15

if Service
$erwgce
Service

For Service Manuals Contact
MAUfilTHON TECHNlCAL SERVICES
8 Cherry Tree Rd. Chinnor
Oxon OX9 40Y
Tel:- 01644-351694 Fax': 01844-352554
Email:- enqurries@maun'lmn.oo.xlt

mum

Service Manual

.g.

CONTENTS

Technical specification
Connections and controls

Inputs and outputs

Operation of the control section
Decasing

Repair hints

Mechanical checks and adjustments
Exploded view

List of mechanical parts
Maintenance

Electrical measurements and
adjustments

List of electrical parts
Wiring diagram

Circuit diagram

Printed circuit boards

DNL unit

Tape tension/protection unit

SaletK regulations requue that the set be restored to Its original condition

and t

at parts which are identical With nose specrtledr be used.

Page

(0th

11
15
18
16

18
20
22
24
26
28
28

tutu»

Subiect to modification

4822 72611712

Prmted in The Netherlands

Docu mentationTechnicue Service Dokumentation Documentazione di Sen/izio Huolte-Ohje Manual de Servicio Manual de Servicio

(35567 84

PHILIPS

Page 2

TECHNICAL SPECIFICATION

0
Mains voltages E 110-127-220-240 V PHONO (X-tal) '_x 0.6 mV/1.5 k9 (3,5)
Mains frequency : 50~60 Hz (Switch-over (MD) -- 0'5 VMO kit (35)
not necessary) AUX : 2 mV/15 k0 (1,4)
. . § 100 mV/1 M0 (3.5)
Power consumption . ca. 35 W TUNER : 2 mV/Z 100 kg (14)
Number of tracks : 4 5 100 mV/2 100 k!)
Max. reel diameter : 18 cm (35)
Number of heads : 3 (1 recording, 1 play- OUIPUI voltages
back and 1 erase head) LINE 3 1 W20 kg (3.5)
. MONITOR :1 W10 k9 (3,5)
Number of motors : 3 (1 for capstandrlve, MFB . 1 V/750 Q
2 for driving the reel .
discs) Output lmpedance
. . . HEADPHONE : 400 Q
Winding time for an 18 cm , .
reel with LP tape (540 m) ;5 150 sek, Frequency range (Within
T . o 7 dB)
399 59 475 "5 i W 4.75 cm/sek : 35 < 11,000 Hz
9.5 cm/sek._«t 1% 9_5 cm/sek :35 - 18,000 Hz
9 cm/sek i 1% 19 cm/sek :35 < 25,000 Hz
WW and flutter at: , Signal-to-noise ratio
S'Escfiiéiik' é 8-3:? accordingto DIN 45,500 .3 56 dB
{9 cm/sek. 23 0:15}, Erase frequency : 100 kHz; 10%
Input sensitivities Dimensions : 535x425x205 mm
MlCRO (Micro sens. switch : 0.2 mV/2 k!) (1.4) Weight : approx 10.3 kg
in position OdB) 100 rnV/1 M9 (3,5)
LINE :2mV/15k9 (1.4)
100 mV/1 MS) (3,5)
CONNECTIONS AND CONTROLS
Figures 1 and 2
t
1 Reel spindles with locking clips 34 Recording level control - left channel '
2 Recording level meter - left channel 35 Recording level control - right channel
3 Overload indicator - left channel 36 Microphone recording level control - left channel "
4 Overload indicator - right channel 37 Microphone recording level control - right
5 Recording level meter - right channel channel
6 Monitor output level control - left channel 38 Line input SSIBCtOF
7 Monitor output level control - right channel 39 Tuner input selector
8 Line output level control - left channel 40 'AUX' WUt selector
9 Line output level control - right channel 41 Phone input selector
10 Line input sensitivity control - left channel 42 F35) rewind key
11 Line input sensitivity control - right channel 43 Fast wind kEY
' 12 Tuner input sensitivity control - left channel 44 Start key
13 Tuner input sensitivity control - right channel 45 Pause key (to disengage, press again)
. 14 'Aux input sensitivity control - left channel 45 Record key
15 'Aux input sensitivity control - right channel 47 (Record, playback and fast wind) 509 key
16 Phone input sensitivity control - left channel 48 Monitor selector
17 Phone input sensitivity control - right channel 49 Track selector
18 Hinged transparent cover 50 Speed selector
19 Tape-tension stabilisers 51 DNL indicator
20 Memory switch for counter 52 DNL switch l
21 Counter 53 Socket for stereo headset
22 Zero-reset button for counter 54 Socket for mono microphone (left channel) or
. stereo microphone can also be used as an
23 Tape threading SIM extra input for radio, amplifier or recorder
24 Detachable head-cover 55 Socket for mono microphone (right channel)
25 Cuelng knob 56 Phone equalisation selector
26 Microphone sensitivity switch 57 Multiplay switch
27 Volume control ' 58 Function selector
28 :alance conltrol 59 Mains switch
:3 Tag; cm": I 60 Mains on/oft-indicator .
Te e con ro 61 Holes for the support-pins for horizontal use
31 Wind speed control . ,
. 62 Carrying handle
32 Post fading control 63 Mains volta e selector '
33 Lock button for post-fading control 9 .