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Philips D8714 - MEASUREMENT AND ADJUSTMENT PARAMETERS; Playback Speed and Azimuth Adjustment; Playback Sensitivity and Indicators; BIAS and Recording Sensitivity Tests

Philips D8714
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Play back SBC126Cr PLAY - BU6 Wow-and- R-motor *a J
speed 3150 Hz (BU7) Flutter meier See M1 Fig. 4 4.76 cm/s :I: 2% ,
Azimuth SBC126Cr PLAY - BU6 mV-meter Screw 71 *f Max. output -J
R/P head 10 kHz SK-J-Cr (BU7) (See Fig. ..)
Playback SBC126Cr SK-J-Cr - MP1 mV-meter R3317 650 mV J
sensitivity 315 Hz-O dB PLAY (MP2) (R3318) '-'
+ SK"N off
Indicators
Arbilrary PLAY 315 Hz MP1 mV-meter LF-generator 580 mV J
via 22 k on (MP2) '-'
MP3 Indicators R3349 0 dB
(MP4) (R3350)
Playback SBC126Cr SK-J-Cr - BU6 mV-meter - See Frequency ~
frequency 125 Hz;250 Hz; PLAY (BU7) response
response 6.3 kHz; SK-N off 125-12.5 kHz
12.5 kHz (:I: 6 dB) V
Target value SBC126Cr Play, SK-N off - MP3 mV-meter R3404 9mV
BIAS Side 2 *c REC SK-J-Cr (MP4) (R3404)
Recording SBC126Cr SK-J-Cr 315 Hz, MP1 mV-meter LF-generalor 580 mV J
sensilivity Side 2 *c REC + PLAY via BU4 (MP2)
R1601-1602 (BUS) , "
on max. *b '
SK-N off V
MP3 mV-meter R3363 1.6 mV
(MP4) (R3364)
*e " /
PLA Y - MP1 mV-meler 580 mV
(MP2) *d
V
BIAS SBC126Cr REC + PLAY - MP1 mV-meter R3403 9 mV ~,
Side 2 *c SK-J-Cr (MP2) (R3404) i~
SK-N off
315 Hz, to BU6 mV-meter LF-generator 29 mV )f J
BU4 (BU7) ;,
(BUS)
Record a number of frequencies; .. .' V
BU4 125 Hz; 250 Hz
(BUS) 6.3 kHz, 12.5 kHz !' .'
Rewind PLA Y - BU6 mV-meter R3403 See Freq. resp. ::.'}
recording (BU7) (R3404) 125 Hz-12.5kHz"'. V
made (:I: 6 dB) *g
/1',
19/38 kHz Arbilrary REC + PLAY 315 Hz, 10 MP1 mV-meter LF-Generator 775 mV ,: , Pilot-lone SK-N off BU4 (MP2) j, '---'
suppression (BUS)
19 kHz, to MP1 mV-meter 5271 ~ 25 mV V
BU4 (MP2) 5272
(BUS)
38 kHz, to MP1 mV-meler - ~ 43.5 mV ~
BU4 (MP2)
(BUS)
A.L,C. Arbilrary REC + PLAY = 600 mV Indicators 3347 LED BAR J
LED BAR SK-M auto 1000 Hz Indo reading
indicators BU4 L= R
(BUS) t.
U
Fig. 7
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