37
KEH-P7850
DOLBY B NR ADJUSTMENT
No.
Test Tape
Adjustment Point
Adjustment Method
(Switch Position)
1
NCT-150
VR301(Lch),VR302(Rch)
mV Meter(2) : –6dBs±1.0dB
(400Hz,200nwb/m)
(DOLBY NR Switch : OFF)
FM ADJUSTMENT
Modulation
M:MONO MOD., 400Hz 30%(22.5kHz Dev.) or 400Hz 100%(75kHz Dev.)
S:STEREO MOD., 1kHz, L or R=30%(20.25kHz+7.5kHz Dev.)
NOTE:Before proceeding to further adjustments after switching power ON, let the tuner run for ten minutes to allow
the circuits to stabilize.
FM SSG
Displayed
Adjustment
Adjustment Method
No.
Frequency(MHz)
Level(dBf)
Frequency(MHz)
Point
(Switch Position)
TUN Volt
1
•••••
•••••
108.0
L5
DC V Meter(1) : 6V
IF
2
98.1 M
60
—
100
98.1
T51
Center Meter : 0
ANT Coil
3
98.1 M
5
98.1
L2
mV Meter(1) : Maximum
RF Coil
4
98.1 M
5
98.1
L4
mV Meter(1) : Maximum
IFT
5
98.1 M
5
98.1
T31
mV Meter(1) : Maximum
(STEREO MODE)
ARC
6
98.1 S
40
98.1
VR154
mV Meter(1) : Separation 5dB
(STEREO MODE)
Summary of Contents for KEH-P7850
Page 4: ...4 KEH P7850 2 2 EXTERIOR ...
Page 7: ...7 KEH P7850 ...
Page 8: ...8 KEH P7850 2 3 CASSETTE MECHANISM MODULE ...
Page 11: ...11 KEH P7850 5 6 7 8 A B C D 5 6 7 8 A b A A ...
Page 12: ...12 KEH P7850 BANTENNA JACK A 1 2 3 4 B C D 1 2 3 4 A a A a A b ...
Page 13: ...13 KEH P7850 C D E F MODULE 5 6 7 8 A B C D 5 6 7 8 A a A a A b C ...
Page 14: ...14 KEH P7850 A A 1 2 3 4 B C D 1 2 3 4 A a A b A b ...
Page 15: ...15 KEH P7850 5 6 7 8 A B C D 5 6 7 8 A b A a A b ...
Page 17: ...17 KEH P7850 ER UNIT IFC 5 6 7 8 A B C D 5 6 7 8 B A ...
Page 22: ...22 KEH P7850 A 1 2 3 4 B C D 1 2 3 4 A A TUNER AMP UNIT ...
Page 23: ...23 KEH P7850 5 6 7 8 A B C D 5 6 7 8 A SIDE B ...
Page 24: ...24 KEH P7850 A 1 2 3 4 B C D 1 2 3 4 4 2 KEYBOARD UNIT C SIDE A KEYBOARD UNIT C ...
Page 25: ...25 KEH P7850 EL901 CN601 EJECT A 1 2 3 4 A B C D 1 2 3 4 C SIDE B C KEYBOARD UNIT ...
Page 26: ...26 KEH P7850 A 1 2 3 4 B C D 1 2 3 4 4 3 FM AM TUNER UNIT B B SIDE A FM AM TUNER UNIT A ...
Page 27: ...27 KEH P7850 1 2 3 4 A B C D 1 2 3 4 B B SIDE B FM AM TUNER UNIT ...
