Philips FW C717 - TAPE ADJUSTMENT AND CHECK PROCEDURES; Recording Adjustments; Playback Adjustments

* For Dolby version only
# For Auto-reverse version only
TEST
CASSETTE
RECORDER
MODE
MEASURE
ON
READ ON
ADJUST
with to
ADJUST DOLBY PLAYBACK LEVEL *
DECK A
DECK B
Playback
TCC-130
(4822 397 30269)
200nWb/m
PLAY
LEFT RIGHT
1 or 2
LEFT RIGHT
PLAY
mV-meter
mV-meter
Check
limits see fig.1
548mV ±0.5dB
3641(L), 3642(R)
3635(L), 3636(R)
SBC420
(4822 397 30071)
CHECK PLAYBACK FREQUENCY RESPONSE
PB. FREQ. RESP.
PLAY FWD
PLAY REV #
Check
548mV ±1dB
7 or 8
General
TEST
CASSETTE
RECORDER
MODE
MEASURE
ON
READ ON
ADJUST
with to
ADJUST MOTOR SPEED
SBC420
(4822 397 30071)
3150Hz
DUBBING
PLAY B
PLAY A
1 or 2
LEFT RIGHT
frequency
counter
3622 *
3620
check
HIGH SPEED
NORMAL SPEED
SBC420
(4822 397 30071)
3150Hz
1 or 2
LEFT RIGHT
SBC420
(4822 397 30071)
10kHz
1 or 2
LEFT RIGHT
PLAY
PLAY FWD
PLAY REV #
W&F-meter check only
mV-meter
left hand screw
right hand screw
max. output level
& left=right
CHECK WOW & FLUTTER
DECK A & B
ADJUST AZIMUTH
5040Hz ± 0.5%
3150Hz ± 0.5%
3150Hz -0.8/+1.8%
≤0.4 % DIN or
≤0.35 % CCIR *
DECK A & B
f(Hz)
level(dB)
figure. 1
Dolby version
4dB
3dB
12.5k
10k
250
f(Hz)
level(dB)
Non-Dolby version
8dB
6dB
12.5k
4k
250
80
8dB
Recording
TEST
CASSETTE
RECORDER
MODE
MEASURE
ON
READ ON
ADJUST
with to
5 or 6
LEFT RIGHT
mV-meter
3773
RECORDED
CASSETTE
1 or 2
LEFT RIGHT
LEFT RIGHT
PLAY
mV-meter check only limits see fig.2
mV-meter
420mV
CrO 2
CrO 2 RECORD
CrO
2 RECORD
RECORDED
CASSETTE
1 or 2
LEFT RIGHT
PLAY
THD-meter check only ≤3%
CrO 2 RECORD
mV-meter
3655 & 3556
RECORDED
CASSETTE
LEFT RIGHT
PLAY
170mV ± 1dB
PRE-ADJUST BIAS AND BIAS-SYMMETRY
DECK B
Inject 3mV signals
100Hz, 250Hz, 1kHz,
10kHz, 12.5kHz
via 3 or 4
CHECK OVERALL FREQUENCY RESPONSE AND DISTORTION
Inject 1kHz 8.85mV
via 3 or 4
Remark: If high frequencies are not within limits, decrease bias and re-measure.
If distortion is too high increase bias and re-measure.
ADJUST DOLBY RECORD LEVEL *
7 or 8
Remark: If measured value is out, re-adjust record level up or down slightly to attain play level.
* For Dolby version only
9 or 10
check
Inject 400Hz 8.85mV
via 3 or 4
3785 *
995mV
left = right
check only
750mV ± 1.5dB
RECORD
FERRO
f(Hz)
level(dB)
figure. 2
Dolby version
5dB
3dB
12.5k
10k
250
f(Hz)
level(dB)
Non-Dolby version
8dB
10dB (HSD)
6dB
10k
4k
250
100
8dB
10dB (HSD)
9A-6
9A-6