Sony MHC-W555 / STR-W555 Service Manual ▷ View online
– 9 –
PANEL Aging Mode
This mode is used for opening and closing the sliding panel continuously.
Setting the aging mode :
With the set at standby condition, press FLASH button, ENTER/NEXT button and STEREO/MONO button together.
The aging will start and sliding panel will follow aging sequence as described below.
The aging will start and sliding panel will follow aging sequence as described below.
• When problems occur ;
Aging stops and “AGING ERROR” is displayed on the fluorescent indicator tube.
• When no problems;
Aging is carried out repeatedly. After 65000 times, “AGING STOP” is displayed and aging stops.
Aging Sequence
Counts up
n
n
Panel open
Panel close
n
Stops for one second in the opened state
Stops for one second in the closed state
Each time the DISPLAY/DEMO button is pressed, the display switches as follows.
Aging @@@@@ (No. of agings carried out)
OP Max @.@@ (Maximum time taken for OPEN:In seconds)
OP Min @.@@ (Minimum time taken for OPEN:In seconds)
CL Max @.@@ (Maximum time taken for CLOSE:In seconds)
CL Min @.@@ (Minimum time taken for CLOSE:In seconds)
– 10 –
Procedure:
1. Supply a 25 dB 98 MHz signal from the ANTENNA terminal.
2. Tune the set to 98 MHz.
3. Adjust RV42 to the point (moment) when the TUNED indicator
1. Supply a 25 dB 98 MHz signal from the ANTENNA terminal.
2. Tune the set to 98 MHz.
3. Adjust RV42 to the point (moment) when the TUNED indicator
will change from going off to going on.
Adjustment Location: TCB board
TUNER SECTION
0dB=1
µ
V
Note 1:
As a front-end (FE1) is difficult to repair if faulty, replace
it with new one.
it with new one.
Note 2:
No adjustment is needed for a tuner pack except for AEP,
UK, German, East European, CIS models.
UK, German, East European, CIS models.
AM Tuned Level Adjustment
(AEP, UK, East European, CIS model only)
(AEP, UK, East European, CIS model only)
Note: FM Tuned Level adjustment should be performed after this
AM Tuned Level Adjustment.
Setting:
Band: MW
Band: MW
Procedure:
1. Set the output of SSG so that the input level of the set becomes
1. Set the output of SSG so that the input level of the set becomes
55 dB.
2. Tune the set to 999 kHz or 1,050 kHz.
3. Adjust RV41 to the point (moment) when the TUNED indicator
3. Adjust RV41 to the point (moment) when the TUNED indicator
will change from going off to going on.
Adjustment Location: TCB board
FM Tuned Level Adjustment
(AEP, UK, East European, CIS model only)
(AEP, UK, East European, CIS model only)
Note: This adjustment should be performed after the AM Tuned
Level Adjustment.
Setting:
Band: FM
Band: FM
FM ANTENNA terminal (TM1)
FM RF SSG
75
Ω
coaxial
Carrier frequency: 98MHz
Modulation:
Modulation:
AUDIO 1kHz, 75kHz
deviation (100%)
deviation (100%)
Output level:
25dB (at 75
Ω
open)
set
loop antenna
AM RF SSG
loop antenna
(Supplied accessories)
(Supplied accessories)
30% amplitude
modulation by
400Hz signal
modulation by
400Hz signal
Modulation: 999 kHz (at 9 kHz step)
1,050 kHz (at 10 kHz step)
60cm
AM antenna
terminal (TM1)
terminal (TM1)
set
Field strength dB (
µ
V/m) = SSG output level dB (
µ
V/m) –26dB.
RV41
AM Tuner Level
AM Tuner Level
TM1
RV42
FM Tuned
Level
IC21
Adjustment Location
[TCB BOARD] (Component Side)
[TCB BOARD] (Component Side)
SECTION 4
ELECTRICAL ADJUSTMENT
– 11 –
FM Polar Adjustment (East European, CIS model only)
Connection 1 :
Connection 2 :
Procedure :
1. Set the modulation of FM RF SSG to AUDIO 1 kHz, 10 kHz
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 con-
3. Adjust the RV1702 so that the reading of frequency counter con-
nected to TP1702 (VCO) 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 (FILTER) becomes maximum.
Then adjust the CT1701 so that the reading of the level meter
connected to TP1701 (FILTER) becomes maximum. (SUB CAR-
RIER PEAK Adjustment)
Then adjust the CT1701 so that the reading of the level meter
connected to TP1701 (FILTER) becomes maximum. (SUB CAR-
RIER PEAK Adjustment)
9. Adjust the RV1701 so that the level at the moment becomes 14
dB higher value than the level recorded in step 4. (SUB CAR-
RIER LEVEL Adjustment)
RIER LEVEL Adjustment)
[TCB BOARD] (Component Side)
Adjustment Location: TCB board
Adjustment Location:
[TCB BOARD] (Conductor Side)
FM antenna
terminal (75
terminal (75
Ω
)
FM RF SSG
75
Ω
coaxial
Carrier frequency: 69 MHz
Output level:
Output level:
1 mV (60 dB
µ
) (at 75
Ω
open)
Modulation:
AUDIO 1 kHz, 10 kHz deviation
set
FM antenna
terminal (75
terminal (75
Ω
)
Audio 31.25 kHz
external
modulation
terminal
modulation
terminal
FM RF SSG
AF OSC
75
Ω
coaxial
Carrier frequency: 69 MHz
Output level:
Output level:
1 mV (60 dB
µ
) (at 75
Ω
open)
Modulation:
AUDIO 31.25 kHz, 10 kHz deviation
(EXTERNAL MODULATION)
(EXTERNAL MODULATION)
set
frequency counter
level meter
TP1701
(FILTER)
(FILTER)
TP1702
(VCO)
(VCO)
IC1701
L1701
CT1701
Sub Carrier Peak
RV1701
Sub Carrier
Level
Sub Carrier
Level
IC1701
RV1702
VCO
VCO
– 12 –
SECTION 5
DIAGRAMS
5-1. CIRCUIT BOARDS LOCATION
MIC / ECHO board
POWER AMP board
SURR SPK board
PRIMARY board
ENCAPSULATED COMPONENT
(E,EA3,EA4,SP,MY,AR,TW,TH,AUS,CH)
TCB board (AEP,UK.EE,CIS)
TUNER board (JE)
(E,EA3,EA4,SP,MY,AR,TW,TH,AUS,CH)
TCB board (AEP,UK.EE,CIS)
TUNER board (JE)
SECONDARY board
HEADPHONE board
LOADING PANEL board
FRONT AV board
PANEL board
MAIN board
MOTOR board
DETECTOR board
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