Read Sony HCD-GRX7 / HCD-GRX7J / HCD-MD500 / HCD-R700 / HCD-RX707 / HCD-RX77 / HCD-RX77S / MHC-GRX7 / MHC-GRX7J / MHC-R700 / MHC-RX77 / MHC-RX77S Service Manual online
– 17 –
FM Polar Adjustment (East European, CIS models only)
Connection 1:
Connection 2:
Adjustment Location :
East European, CIS:
East European, CIS:
[TCB BOARD] (Component Side)
Procedure :
1. Set the modulation of FM RF SSG to AUDIO 1 kHz, 10 kHz
deviation according to “Connection 1”.
2. Tune the set to 69 MHZ.
3. Adjust the RV1702 so that the reading of frequency counter
3. Adjust the RV1702 so that the reading of frequency counter
connected to TP1702 becomes within 31.25 kHz ± 0.05 kHz.
(VCO Adjustment)
(VCO Adjustment)
4. Then record the reading of the level meter connected to TP1701
5. Set the modulation of FM RF SSG to AUDIO 31.25 kHz, 10
5. Set the modulation of FM RF SSG to AUDIO 31.25 kHz, 10
kHz deviation according to “Connection 2”.
6. Tune the set to 69 MHz.
7. Set the CT1701 to be mechanical center.
8. Adjust the L1701 so that the reading of the level meter con-
7. Set the CT1701 to be mechanical center.
8. Adjust the L1701 so that the reading of the level meter con-
nected to TP1701 become maximum.
Then adjust the CT1701 so that the reading of the level meter
connected to TP1701 becomes maximum. (SUB CARRIER
PEAK Adjustment)
Then adjust the CT1701 so that the reading of the level meter
connected to TP1701 becomes maximum. (SUB CARRIER
PEAK Adjustment)
9. Adjust the RV1701 so that the level at the moment becomes
14dB higher value than the level recorded in step 4. (SUB CAR-
RIER LEVEL Adjustment)
RIER LEVEL Adjustment)
[TCB BOARD] (Conductor Side)
FM ANTENNA terminal
(75
(75
Ω
)
75
Ω
coaxial
set
FM RF SSG
AF OSC
Audio 31.25 kHz
external
modulation
terminal
modulation
terminal
Carrier frequency : 69 MHz
Output level
Output level
: 1mV (60 dB
µ
) (at 75
Ω
open)
Modulation
: AUDIO 31.25 kHZ, 10 kHz deviation
(EXTERNAL MODULATION)
(EXTERNAL MODULATION)
FM ANTENNA terminal
(75
(75
Ω
)
75
Ω
coaxial
set
FM RF SSG
Carrier frequency : 69 MHz
Output level
Output level
: 1mV (60dB
µ
) (at 75
Ω
open)
Modulation
: AUDIO 1 kHZ, 10kHz deviation
TM1
IFT41
IC41
CN1
RV42
FM Tuned Level
Adjustment
FM Tuned Level
Adjustment
RV41
AM Tuned Level
Adjustment
AM Tuned Level
Adjustment
L1701
Sub Carrier Peak
Adjustment
Sub Carrier Peak
Adjustment
RV1701
Sub Carrier Level
Adjustment
Sub Carrier Level
Adjustment
CT1701
Sub Carrier Peak
Adjustment
Sub Carrier Peak
Adjustment
RV1702
VCO Adjustment
VCO Adjustment
frequency
counter
counter
+
–
+
–
–
level meter
Q1701
Q1702
Q1703
TP1701
(FILTER)
(FILTER)
TP1702
(VCO)
(VCO)
Click on the first or last page to see other HCD-GRX7 / HCD-GRX7J / HCD-MD500 / HCD-R700 / HCD-RX707 / HCD-RX77 / HCD-RX77S / MHC-GRX7 / MHC-GRX7J / MHC-R700 / MHC-RX77 / MHC-RX77S service manuals if exist.