Sony TC-FX45 - Manual (Page 14)

3-2. ELECTRICAL ADJUSTMENTS Capstan motor Speed Adjustment
Note: The adjustment should be performed in
the order given in this service manual.
The adjustments should be performed
for both L-CH and R-CH.
Set the BIAS and EQ switches according to the
tape as follows.
cs-30 I Fe-Cr (METAL) III: Fe-Cr
cs-40
AUTO
Fe-Cr (METAL)
IV: METAL
Switches and controls should be set as follows
unless otherwise specified.
DOLBY NR switch: OFF
TAPE switch: AUTO (I: NORM)
l Standard Record:
Deliver the standard input signal level to the
input jack and set the REC LEVEL control to
obtain the standard output signal level.
Standard Input Level
MIC LINE IN
source impedance 300 ohm 1 O k
input level 0.77 mV (-60 dB) 0.25 V (-10 dB)
Standard Output Level
H E A D P H O N E S L I N E O U T 1
load impedance 4 7 k
output level 31 mV (-26 dB) 1 0.435 V (-5 dB) I
- 1 5-
Procedure:
Mode: playback
speed checker
L FM-30
digital
test tape
WS-48A
(3 kHz, 0 dB)
counter
set
LINE OUT
Specification:
Speed checker
I
Digital frequency counter
I -0.8~+0.8% I 2975 ~ 3025 Hz I
Frequency difference between the beginning
and the end of the tape should be within 0.84%
(25 Hz).
Adjustment Location:
motor
Adjust the speed by using screwdriver. When
turning the screw clockwise, speed is faster.