Pioneer SX-700L Service Manual page 19

D
7. ADJUSTMENTS
7 . 1
T U N E R S E C T I O N
Ttrning Voltage
o Set the FUNCTION selector to the MW position, the MANUAL switch to the ON position.
r Turn the TUNING knob counter-clockwise as far as it will eo.
FM Tunet
o Connect the FM SG (FM signal generator) to the
antenna.
o Set the FUNCTION selector to the FM position,
FM ANTENNA 300Çl terminal via a 300S2 dummy
FM MUTING switch to the OFF position'
Step
F U N C T I O N
Adlustmenl
point
Adiustmsnt method
1
M W ( n o i n p u t ) v R 2 0 1 - b
O b t a i n a r e a d i n g o f D C 1 . 5 V ( w i t h i n r 5 0 m v ) b e t w e e n t e r m i n a l n o . 4 2 a n d
g r o u n d .
2
F M ( n o i n p u t ) V8201-c
O b t a i n a r e a d i n g o f D C 6 V ( w i t h i n l 5 0 m V )
b e t w e e n t e r m i n a l n o . 4 2 a n d
g r o u n d ,
Step
FM SG (40OHz, t75kHz DEV.)
Position of
dial poantel
\djustment
Adjustment method
Frequency
Level
POrnr
1
1 0 6 M H z
106d8
1 0 6 M H z
cT403
Obtain maximum deflection of the signal meter.
2
T402
Obtain maximum demodulated output (at TAPE REC
t e r m i n a l l .
3
1 0 6 M H z
2(HB
106MHz
cT403
4
cT401
5
cr402
6
T401
7
9 O M H z
20dB 9 O M H z
L403
8
L401
I
1402
1 0
Bepeat steps 3 to 9 until the maximum sensitivity.
1 1
9 8 M H z
( F i n t u n e
to sx-700L)
20dB
98MHz
T402
Obtain minimum distortion in the demodulated output
( T A P E R E C t e r m i n a l ) .
66dB
1 2 N o s i g n a l
9 8 M H z
VR2O3
O b t a i n a r e a d i n g o f D C 4 . 7 5 V ( w i t h i n 1 5 0 m V ) b e t w e e n
t e r m i n a l n o . 9 a n d g r o u n d .
o
o