Samsung RCD-750 Service Manual page 37

7-2. Tape section
1) Recording BIAS adjustment
® Connect frequency counter to JC502 (See Fig.7)and press the Record button.
@ Adjust JT501 (BIAS OSC COIL) until frequency counter reads 50KHz on stereo FM mode .{ "0 " position)
2) Tape AZIMUTH adjustment
3) Tape speed adjustment
® Connect the equipments as shown in Fig.8 adjust the tape speed with test tape (recorded at 3KHz : MTT-111N)
MAIN PCB
VTVM
Jcs502
|
| oO
{r
FREQUENCY | =
e-| COUNTER
t___ : | i /| OSciLLoscore
1
UNIT
UNDER TEST
L| FREQUENCY
rt 3000Hz || COUNTER
Fig.7 Recording bias adjustment
Adjustment screw | : i