Playback System Adjustments; Recording System Adjustments - Rotel Rpm-10 Technische Anleitung

Playback
Instruments: Oscilloscope, AC VTVM, Frequency Counter and Test Tape
Conditions: Oscilloscope, AC VT VM and Frequency
Adjustment Item
Azimuth
Dolby Level
LED Calibration
Playback EQ Check
Tape Speed Deflection
Check/Tape Speed
Adjust
Recording
Instruments: Oscilloscope, Signal Generator AC VTVM and Blank Tape
Conditions: Dolby N R ... OFF
Adjustment Item
Bias Carrier
19KHz Filter
Bias Voltage
System Adjustments
Counter
Test Tape
LCT-3004-C
VR701
VR702
CCT-7001
LCT.3009.C
I-CT -3001
System
REC Level . .. Maximum
Coupling
Oscilloscope . . Point TP20
(TP18R-ch)
S.G. (400Hz OdB) LINE
TP5 (6) LINE OUT ... TP13 (12
Changed S.G. to 19K Hz
Dolby NR ON
Oscilloscope .
Point23
(22R.ch)
LINE OUT Tape Selector
Adjust
REC/PB
Obtain
head screw for both channels (Fig. I)
AC VTVM
(R ch)
VR705 (L.ch)
The LEDs indicator
VR706 (Rch) the OdB LED. (Fig. 2)
Output Level difference between 40Hz,
1 KHz and 10KHz signal is within
Check that allowable margin of deflection
or at the end of winding is in the range of +2%—1% (at
3000Hz allowable margin of deflection
If TapeSpeed deflection surpassesthe above range
adjust speed of Motor (Fig. 3)
Adjustments
Tape
Selector
METAL
IN
NORMAL.
METAL
NORMAL Dolby NR
Adjust for
iargest wave form on Oscilloscope
reads 580mV at iC 701 Pin 7.
corresponds
±3.OdB
at middle of
Of speed is 3060-2970)
Adjust
L701 (L ch) Obtain
L702 (R.ch)
on the Oscilloscope
L 703 (L-ch)
AC VTVM
L 702 (R-ch) (Minimum)
VR901 (L-ch)
AC VTVM
VR902 (R-ch)
. OFF
with
Adjust for
Min. deflection
reads -30dB
reads 6mv