Sony ZS-X7 Service Manual ▷ View online
– 13 –
•
Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
CFT1
450kHz
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust part
Frequency display
reading on digital
voltmeter.
L4
530kHz
Adjustment Value : 0.9V
Standard Value : 0.85 – 0.95V
Confirmation
1,710kHz
4.6 – 5.8V
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
620kHz
CT3
1,400kHz
TUNER SECTION
AM Section
BAND button : AM
Volume : MIN
Volume : MIN
FM Section
BAND button : FM
Volume : MIN
Volume : MIN
Adjustment Location : Tuner boar d (See pa ge 14)
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust part
Frequency display
reading on digital
voltmeter.
Confirmation
87.5MHz
1.55 – 1.85V
L2
108MHz
Adjustment Value : 4.0V
Standard Value : 3.9 – 4.1V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
87.5MHz
CT1
108MHz
AM RF signal
generator
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
signal.
Output level : as low as possible
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
FM RF signal
generator
generator
22.5kHz frequency deviation by
400Hz signal.
Output level : as low as possible
400Hz signal.
Output level : as low as possible
telescopic
antenna
terminal
antenna
terminal
0.01
µ
F
set
16
Ω
+
–
–
i
jack (J501)
level meter
0 dB = 1
µ
V
SECTION 5
ELECTRICAL ADJUSTMENTS
– 14 –
Connect and Adjustment Location :
JW2
Digital voltmeter
100k
Ω
JW2
CT1 : FM Tracking Adjustment
CT3 : AM Tracking Adjustment
L3 : AM Tracking Adjustment
L4 : AM Frequency
Coverage Adjustment
Coverage Adjustment
Frequency Coverage Adjustment
L1 : FM Tracking Adjustment
CFT1 : AM IF Adjustment
L2 : FM Frequency
Coverage Adjustment
Coverage Adjustment
[TUNER BOARD] (Component side)
– 15 –
SECTION 6
DIAGRAMS
6-1. EXPLANATION OF IC TERMINALS
IC801 SYSTEM CONTROL (CXP83620-016Q)
Pin No.
Pin name
I/O
Description
1
SCOR
I
CD SCOR input.
2
SENSE
I
CD SENS input..
3
R-MUTE
O
Radio muting signal output.
4
ADJ
O
DC 1.7V output for beep signal.
–––––––––––
5
BEEP
O
Beep signal output.
6
YMLD
O
LATCH signal output for ESP controller (IC704).
7
YMCLK
O
Serial clock output for ESP controller (IC704).
8
ZSENSE
I
Serial data input from ESP controller (IC704).
9
YMDATA
O
Serial data output for ESP controller (IC704).
10
SQCK
I
CD SQCK input.
11
SQSO
I
CD SUB Q data input.
12
P-CON
O
Power ON/OFF control signal output.
13
DOOR
I
CD door switch (S701) input.
14
LOAD
O
Battery check output.
15
XRST
O
System reset output.
16
LATCH
O
CD system LATCH output.
17
CLK
O
CD serial clock output.
18
DATA
O
CD serial data output.
19
C-MUTE
O
CD mute signal output.
20
ESP
O
ESP ON/OFF signal output.
21
INIT
–
Not used (OPEN).
22
SIMUKE
I
Destination detect input (Fixed at “H”).
23 – 25
KEY1-3
I
Key input.
26
REG-CHK
I
DC regrator output voltage detect input.
27
BACK UP-CHK
I
Back-up battery voltage detect input.
28
BATT-H
I
Main battery high voltage detect input.
29
BATT-M
I
Main battery low voltage detect input.
30
RESET
I
System reset input.
31
EXTAL
I
System clock oscillator input terminal (4.19MHz).
32
XTAL
O
System clock oscillator output terminal (4.19MHz).
33
VSS
–
Ground.
34
VL
I
Reference voltage input.
35 – 37
VLC1-3
I
Reference voltage input.
38 – 41
COMO 0-3
O
LCD common output.
42 – 62
SEG 0-20
O
LCD segment output.
63
V-CLK
O
Volume clock output.
64
DATA
O
Volume data output.
65
V-LATCH
O
Volume LATCH output.
66
RADIO
O
Function output for radio.
67
A-MUTE
O
Audio mute signal output.
68
BEEP-H/L
O
Beep level high/low select output.
69
TU-CLK
O
PLL IC clock output.
70
TU-DATA
O
PLL IC data output.
– 16 –
Pin No.
Pin name
I/O
Description
71
TU-CE
O
PLL IC chip enable output.
72
VDD
–
Power supply terminal (B+ 3.3V)
73
TX
O
Sub System clock oscillator output (32.768kHz).
74
TEX
I
Sub System clock oscillator input (32.768kHz).
75
NC
–
Not used (OPEN).
–––––
76
CD
O
Function output for CD.
–––––––––––––––––––
77
KEY-CHK
O
Key operation enable output.
78
E. C
–
Connect to ADJ (4 pin).
79
R-COUNT
I
PLL IC data input.
80
SENS 2
I
CD SENS 2 input.
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