36
KEH-P424,P4700,P4750
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)
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 ADJUSTMENT(KEH-P424/X1M/UC,P4700/X1M/UC)
FM SSG
Displayed
Adjustment
Adjustment Method
No.
Frequency(MHz)
Level(dBf)
Frequency(MHz)
Point
(Switch Position)
TUN Volt
1
•••••
•••••
107.9
L5
DC V Meter(1) : 6V
IF
2
98.1 M
60
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)
FM ADJUSTMENT(KEH-P4750/X1M/ES)
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
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-P424
Page 4: ...4 KEH P424 P4700 P4750 Fig 2 2 2 EXTERIOR ...
Page 9: ...9 KEH P424 P4700 P4750 5 6 7 8 A B C D 5 6 7 8 A b A Fig 4 POWER AMP ...
Page 10: ...10 KEH P424 P4700 P4750 A 1 2 3 4 B C D 1 2 3 4 A B A a A a A b ...
Page 11: ...11 KEH P424 P4700 P4750 5 6 7 8 A B C D 5 6 7 8 C D E F Fig 5 A a A a A b C ...
Page 12: ...12 KEH P424 P4700 P4750 A 1 2 3 4 B C D 1 2 3 4 POWER AMP A a A b A b ...
Page 13: ...13 KEH P424 P4700 P4750 5 6 7 8 A B C D 5 6 7 8 Fig 6 A b A a A b ...
Page 15: ...15 KEH P424 P4700 P4750 5 6 7 8 A B C D 5 6 7 8 B Fig 7 ...
Page 16: ...16 KEH P424 P4700 P4750 A 1 2 3 4 B C D 1 2 3 4 3 3 CASSETTE MECHANISM MODULE A D D ...
Page 17: ...17 KEH P424 P4700 P4750 5 6 7 8 A B C D 5 6 7 8 E F Fig 8 D E F ...
Page 19: ...19 KEH P424 P4700 P4750 5 6 7 8 A B C D 5 6 7 8 B D CN251 CN901 SY Fig 9 SIDE A D B A ...
Page 20: ...20 KEH P424 P4700 P4750 A 1 2 3 4 B C D 1 2 3 4 A A TUNER AMP UNIT ...
Page 21: ...21 KEH P424 P4700 P4750 5 6 7 8 A B C D 5 6 7 8 Fig 10 A SIDE B ...
Page 25: ...25 KEH P424 P4700 P4750 1 2 3 4 A B C D 1 2 3 4 Fig 14 B B SIDE B FM AM TUNER UNIT ...
Page 37: ...37 KEH P424 P4700 P4750 7 GENERAL INFORMATION 7 1 PARTS 7 1 1 IC TDA7384 TDA7386 PM2006A ...
Page 41: ...41 KEH P424 P4700 P4750 7 1 2 DISPLAY CAW1477 Fig 21 COMMON SEGMENT ...
Page 43: ...43 KEH P424 P4700 P4750 7 3 BLOCK DIAGRAM KEH P424 X1M UC Fig 24 D C B E A F ...
Page 50: ......
