1-15
RC-BZ5LB/BZ5RD
RC-BZ6BU
1.
Low frequency oscillator
(Frequency range: 50Hz to 20kHz)
(Output: 0 dBs across 600
Ω
terminating resistor)
2.
Attenuator(Impedance: 600
Ω
)
3.
Test Tapes
VT712
For tape speed, wow & flutter check
VT722, 724
For playback, output level check
VT738
For playback frequency response check
VT702
For head azimuth adjustment
4.
Blank tape TYPE1:AC–225
5.
Electronic voltmeter
6.
Distortion meter
7.
Frequency counter
8.
Wow and flutter meter
9.
Torque gauge(Cassette type)
CTG – N
10. Test disc
CTS1000
11. Jitter meter
NJM631
12. TE Offset
LTM9055
Measuring conditions(Amplifier section)
Supply voltage
AC120V(60Hz)
DC12V(UM–1 x 8)
Reference output level
Speaker
: 0 dBs(0.775V) / 3
Ω
Headphone
: –10 dBs(0.245V) / 32
Ω
Reference input level
: –20 dBs supplied to test point CN1
Standard test frequency
1kHz
Output measuring point
Speaker terminal
:Dummy load 3
Ω
Standard position of switches
Function switch
TAPE
Beat cut switch
NORMAL
Standard position of controls
Tone
Maximum position
Main volume adjust
0 dBs output position
Adjustment method
Test Instruments required for adjustment
Test remarks
1. Negative side of the input and output terminals of the
testing set, shall be isolated from each other. The
negative side should not be commonly connected
when a 2channel electronic voltmeter is connected.
2. A dummy load shall be connected to the output
terminal and the lead wires of dummy load shall be
as thick as possible.
Measuring condition(Tuner section)
Power supply voltage to tuner
Vcc: DC 6V
Reference output
Speaker: 0.245V/3
Ω
AM modulation
400Hz, 30%
FM modulation
400Hz, deviation 22.5kHz
Remarks for alignment
1. Connect 30 pF capacitor and 33k
Ω
resistor to the
output terminal of the IF sweeper in series while
0.082 µ F capacitor and 100k
Ω
resistor to the input
terminal in series.
2. Set the output level of the IF sweeper as low as
adjustable.
3. IF alignment is not necessary for both AM and FM
MPX alignment is not necessary either. All IFTs and
MPX coil are non-adjusting type.
www.freeservicemanuals.info
11/28/2017
Digitized in Heiloo Netherlands