Philips 70 fc 931 service manual

Page 1

Double auto reverse deck 70FC931/005/01S/17s

Sewice
Servrce
Servrce

Serv

Table of contents

Connections and controls
Specification

Display

Alignment

Servicing hints

Alignment layout

Mechanical adjustments and checks
Maintenance and lubrication instructions
Display test mode

Circuit diagram: - AF board - pan 1

- AF board - part 2
- Display board

- AF board - part 3
- autobias board

- RC bus board

- headphone board

- power supply board

- mains switch board

- drive mechanism CRD 467
- drive mechanism CFlD 468

Safety regulations require that the set be restored to its orginal
condition and that parts which are identical with those specilied

Published by Philips Consumer Electronics Printed in the Netherlands

CS 33148

page
2 ,3

10
1D
10
13,14.15

1517,18

2324,25
26,27,223

31.32

Manual

Circuit diagram: - logic board 37,36,39
- display board
- keyboard
PCB: -AiF board 11,12
19,20
21 ,22
- autobias board 29.30
» RC bus board 33,34
- headphone board
- power supply board
- mains switch board
- drive mechanism CRD 467
- drive mechanism CRD 468
» logic board 35,36
- display board
- keyboard
wiring diagram 40,41,42
Exploded view: - list of mechanical parts 43,44
drive mechanism CED 468
- list of mechanical parts 45,45
drive mechanism CRD 467
- list at mechanical parts 47.48
cassette deck
List of electrical pans 49

QCopyright reserved Subject to modification 4822 725 23018

runs

PHILIPS

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CONNECTIONS AND CONTROLS

7 8 91011 12 13

15 18

1 POWER STANDBY/OFF - for switching the cassette deck on
and oil

2 OPEN - for opening cassette holder 3 of deck A
3 Cassette holder A - for playback in both directions
4 COUNTER

- COUNTER MODE - for selecting display to show the tape
counter. the total playing lime or the track playing time

- COUNTER SELECT - for selecting the tape counter to count lor
deck A or deck 8

- CO NTER RESET - tor returning the tape counter in the display
to If 3

- COUNTER MEMO - for storing the actual counter reading in the
memory

5 REC BALANCE - for adjusting the recording balance
6 Display
7 REC LEVEL - for adjusting the recording volume

8 AUTO BIAS - tor starting the automatic procedure which adjust
correct recording bias lor the tape in deck B.

9 DOLBV MODE - tor switching the Dolby Noise Reduction

system on and off and selecting Dolby B or Dolby C

Dolby nurse reduction and HX Pro headroom extension manufactured under iicense
lrom Dolby Laboratories Licensing Corporation. Hx Pro originated by Bang and
Olmsen. DOLBV. the compo symbol no and Hx Pro are trademarks oi Dolby
laboratories Licensing Corporation.

10 REVERSE MODE:

T the tape stops at the end of each side.

I) playback (+ recording lor deck B) 01 both cassette sides.
after which the tape stops at the end of the second side.

(:3 - contlnuous playback at both cassette sides

(I) CZ) ~ for continuous playback of both cassette sides on
both decks

1i1 RECORD CANCEL - for cancelling the current recording. The
set will go back to the beginning of the current recording and
enter the record pause mode.

12 Cassette holder 3 - for recording and playback in both
directions

CS 33 149

13 OPEN - for opening cassette holder 12 of deck B

14 PHONES - socket for stereo headphones
You can connect a pair 01 stereo headphones with 6.3 mm plug
to this socket.

15 Keyboard for deck A and deck B

- <4 - for fast wrnding in the opposite direction to that in which
the tape is travelling or for searching for previous tracks when
pressing this key briefly during playback

- STOP l - ior stopping the tape transport
- PLAYD - for starting playback

- >> 7 for fast winding in the tape travel direction or tor searching
for next tracks when pressing this key briefly during playback

- CHANGE SIDE - lor reversing the tape travel direction of the
playing deck (A or B) or reversing the tape travel direction of
both decks when they are in STOP mode, After switching on the
power. the unit always automatically displays the last directions
chosen.

16 RECORDING

- RECORD - for starting recording.
- MUTE - tor recording a pause (silent passage)
- PAUSE - for preparing or interrupting a recording

17 APPEND - for searching for a blank space on the tape in deck B
oi at least 20 seconds suitable tor recording

18 DUBBING

- NORMAL - [or dubbing from deck A to B at normal speed

- FAST - for dubbing from deck A to B at high speed

- CD SYNC. - for synchro start of deck B and a CD player when
recording from a Compact Disc (provided the CD player is
connected via its ESl bus to your Philips system 900 series).