Pioneer FH-MG6406ZH Q1, Service Manual

Page: 67 / 86

67
FH-MG6406ZH
FM ADJUSTMENT
Modulation M:MONO MOD., 400Hz 30%(22.5kHz Dev.)
S1: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) : 6.5V
Center 1 98.1 M 65 98.1 L52 Center Meter : 0
Meter
ANT 1 89.9 M 5 89.9 L2 mV Meter(1) : Maximum
Coil
RF Coil
1 89.9 M 5 89.9 L4 mV Meter(1) : Maximum
IFT 1 98.1 M 5 98.1 T31 mV Meter(1) : Maximum
Separation
1 98.1 S 65 98.1 VR101 mV Meter(1) : Maximum
ARC
1 98.1 S 39 98.1 VR154 mV Meter(1) : Separation 5dB
Separation
Interstation
1 98.1 M 65 98.1 ••••• mV Meter(1) : AdB
Noise 2
98.1 M
-
∞
98.1 VR151 mV Meter(1) : A-20dB
Search
1 98.1 M 23.5 98.1 VR156 DC V Meter(2) : Level "H"
Sensitivity
2 98.1 M 22.5 98.1 VR156 DC V Meter(2) : Level "L"
3 Repeat steps 1 and 2 until the adjustment standards are satisfied.
AM ADJUSTMENT
FM SSG(400Hz,30%) Displayed Adjustment Adjustment Method
No.
Frequency(kHz)
Level(dBµ)
Frequency(kHz)
Point (Switch Position)
Search
1 999 32 999 VR247 DC V Meter(3) : Level "H"
Sensitivity
2 999 31 999 VR247 DC V Meter(3) : Level "L"
3 Repeat steps 1 and 2 until the adjustment standards are satisfied.
DOLBY B NR ADJUSTMENT
No. Test Tape Adjustment Point Adjustment Method
(Switch Position)
1 NCT-150 VR301(Lch),VR302(Rch) mV Meter(2) : –8.24dBm(300mV)±1dB
(400Hz,200nwb/m) (DOLBY NR Switch : OFF)