Section 3 Electrical Adjustments - Sony Icf-Cs970L Service Manual

SECTION 2
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
@ + BIP3 x 14—— oo ™ ae
Pull out the switch, then remove.
FRONT CABINET
@+ BTP3 x 14
@front cabinet
TRANSFORMER POWER_
@ transformer power
@+ BTP3 x 14
INSTALLING THE DIAL POINTER
@ install the tuning knob.
panel Assy
SS
—
radio board
- \@install the panel
assembly while holding Ke]
the tuning konb. —
a
@ Fully turn the gear
VC counterclockwise.
| indicated by the arrow.
@ Set the pointer to the groove at which
we convex portion of the chassis stops.
pointer
el
Ss
og -
(Front panel side view)
1) Align the pointer |
with the groove
and install it.
@ Move the pointer in the direction
'SECTION 3
ELECTRICAL ADJUSTMENTS
{RADIO SECTION
FM Section
FM rf signal
generator
TP
400Hz, 30% FM modulation
frequency deviation +22.5kHz
output level: at Jow as possible
FM FREQUENCY
. COVERAGE ADJUSTMENT
Adjust for a maximum reading
on VTVM.
L5 87.3MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading
on VTYM,
RV 3
AM Section
AM rf signal
generator
Put the lead-wire
antenna close to -
the set,
400Hz, 305%
AM modulation
. Output level: as Jow as possible |
SP1 or SP2
@ Repeat the procedures in each adjustment
several times, and the frequency coverage and
tracking adjustments should be finally done by
the trimmer capacitors,
AM IF ALIGNMENT
Adjust for a maximum reading
on VTVM,
455kHz
MW FREQUENCY
COVERAGE ADJUSTMENT
Adjust for a maximum reading
on VTVM,
Adjust for a maximum reading
on VTVM.
Pte 600K
Pett 400KHZ
MW TRACKING ADJUSTMENT .
LW FREQUENCY
COVERAGE ADJUSTMENT
Adjust for a maximum reading
on VTVM,
Adjust for a maximum reading
L9 ——RADIO BOARD—
MIN <-—— MAX
N <—+ MAX
RV2
Bear: