Philips FWM570/21, Service Manual

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CONNECTOR 1740 DECK A & B CONTROL INTERFACE
(For Dolby B NR version only)
1 REC REW Record tab protection status switch (reverse) [open=on: close=off]
2 CrO2 B Chrome tape detection switch deck B [open=Cr: close=Fe]
3 REC FWD Record tab protection status switch (forward) [open=on: close=off]
4 PHOTO B Photo sensor output (tape movement indication)
5 SOL B Solenoid supply for deck B
6 Vcc Deck / Motor supply
7 MODE B Mode switch (head engagement) [open=off: close=engaged]
8 GND M Deck / Motor ground
9 SOL A Solenoid supply for deck A
10 PHOTO A Photo sensor output (tape movement indication)
11 MODE A Mode switch (head engagement) [open=off: close=engaged]
12 L L pin for motor
13 CrO2 A Chrome tape detection switch deck A [open=Cr: close=Fe]
14 H H pin for motor
CONNECTOR 1770 DECK A & B CONTROL INTERFACE
(For Non-Dolby version only)
1 REC REW Record tab protection status switch (reverse) [open=on: close=off]
2 CrO2 B Chrome tape detection switch deck B [open=Cr: close=Fe]
3 REC FWD Record tab protection status switch (forward) [open=on: close=off]
4 PHOTO B Photo sensor output (tape movement indication)
5 SOL B Solenoid supply for deck B
6 Vcc Deck / Motor supply
7 MODE B Mode switch (head engagement) [open=off: close=engaged]
8 GND M Deck / Motor ground
9 SOL A Solenoid supply for deck A
10 PHOTO A Photo sensor output (tape movement indication)
11 MODE A Mode switch (head engagement) [open=off: close=engaged]
12 L L pin for motor
13 CrO2 A Chrome tape detection switch deck A [open=Cr: close=Fe]
14 H H pin for motor
CONNECTORS ASSIGNMENTS:
CONNECTOR 1701 INTERCONNECTION TO AF BOARD
1 REC-L Record input left
2 REC-R Record input right
3 GND A AF Ground
4 TAPE-L Playback output left
5 +12V D.C. supply (+12V) for AF electronics
6 TAPE-R Playback output right
7 -CMOS Negative d.c. supply (-9V) for CMOS ICs
CONNECTOR 1703 INTERCONNECTION TO AF BOARD
1 GND M Motor Ground
2 +MOTOR D.C. supply (+12V) for tape deck motor & solenoid
CONNECTOR 1706 INTERCONNECTION TO FRONT BOARD
1 AD2 Deck sensing switches output voltage / Deck A EOT
2 AD1 Deck sensing switches output voltage / Deck B EOT
3 +5V DC 5V for ADC network
4 GND P Control & Oscillator Ground
5 CLK HEF4094BT shift register Clock line
6 DATA HEF4094BT shift register Data line
7 STROBE HEF4094BT shift register Strobe line
CONNECTOR 1710 DECK B HEADS CONNECTON
(For Non-Dolby version only)
1 B R/P HD L+ R/P Head left channel positive
2 GND A R/P Head return ground
3 B R/P HD R+ R/P Head right channel positive
4 ERASE HEAD Erase Head
5 GND A Erase Head ground
CONNECTOR 1720 DECK B HEADS CONNECTON
(For Dolby B NR version only)
1 B R/P HD L+ R/P Head left channel positive
2 B R/P HD L- R/P Head left channel negative
3 B R/P HD R+ R/P Head right channel positive
4 B R/P HD R- R/P Head right channel negative
5 ERASE HEAD Erase Head
6 GND A Erase Head ground
CONNECTOR 1730 DECK A HEAD CONNECTIONS
(For Double Deck versions only)
1 A PB HD L+ Pb Head left channel positive
2 GND A Pb Head return ground shield
3 A PB HD R+ Pb Head right channel positive
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