Panasonic SC-EN25P / SC-EN26P / SC-EN27PC Service Manual ▷ View online
16 Measurements and Adjustments
16.1. Tuner Adjustment
16.1.1. Required tools and equipment
· Signal generator
· AM loop antenna
· Oscilloscope or electrical voltage meter
· Headphone jig
· AM loop antenna
· Oscilloscope or electrical voltage meter
· Headphone jig
16.1.2. Preparations for Adjustment
· Apply under [9. Operation Checks and Component Replacement].
· Connect to the power supply (AC120V).
· Maximize the volume.
· Connect to the power supply (AC120V).
· Maximize the volume.
16.1.3. AM RF Adjustment
1. Input AM signal generator output from the AM loop antenna.
2. Connect a measuring instrument to the headphone jack.
3. Tune to the signal (SG 603kHz).
4. Adjust L51 so that the output reaches maximum.(Fig.01)
2. Connect a measuring instrument to the headphone jack.
3. Tune to the signal (SG 603kHz).
4. Adjust L51 so that the output reaches maximum.(Fig.01)
16.1.4. AM IF Adjustment
1. Follow the steps 1 and 2 of AM RF Adjustment.
2. Tune to the signal (SG 450kHz).
3. Revolve the T1 core and adjust that the output waveforms reaches maximum. (Fig.02)
2. Tune to the signal (SG 450kHz).
3. Revolve the T1 core and adjust that the output waveforms reaches maximum. (Fig.02)
16.1.5. AM VCO Adjustment
1. Input AM single generator output from the AM loop antenna.
2. Set the electrical voltage meter to TP1 - TP3.
3. Tune to the signal (SG 520kHz).
4. Adjust L51 so that the output reaches DC 1.4±0.3V.
2. Set the electrical voltage meter to TP1 - TP3.
3. Tune to the signal (SG 520kHz).
4. Adjust L51 so that the output reaches DC 1.4±0.3V.
16.1.6. FM RF Adjustment
1. Set the frequency of FM signal generator to 87.9MHz.
2. Input to TP1(RF I/P) - TP2(RF O/P) through FM dummy antenna.
3. Adjust L7 so that the output reaches maximum. (Fig.01)
4. Take measurement at point 1, point 2 and point 3 (GND). Range from 2.15 ± 0.5 V
2. Input to TP1(RF I/P) - TP2(RF O/P) through FM dummy antenna.
3. Adjust L7 so that the output reaches maximum. (Fig.01)
4. Take measurement at point 1, point 2 and point 3 (GND). Range from 2.15 ± 0.5 V
37
SC-EN25P / SC-EN26P / SC-EN27PC
16.2. Adjustment Point
(Fig.01)
(Fig.02)
38
SC-EN25P / SC-EN26P / SC-EN27PC
· IC801 (MN101C74FAD) Microprocessor
Pin No.
Mark
I/O
Function
1 - 4
COM0 - COM4
O LCD common output
5 - 7
VLC3 -VLC1
-
LCD power supply
8
C2
-
Capacitor terminal for
pressure
pressure
9
LCD_GND
O/I LCD GND
10
PC1
I
Writing data
11
PC2
I/O Writing clock
12
CD_BOTTOM_SW
I/O CD bottom switch
13
CD_TOP_SW
I/O CD top switch
14
MBP1
O Beet proof 1
15
MBP2
O Beet proof 2
16
VSS
-
GND
17
OSC1
I
Main oscillator input (8MHz)
18
OSC2
O Main oscillator output (8MHz)
19
VDD
-
VDD +3.3V
20
XI
I
Sub oscillator input (32kHz)
21
XO
O Sub oscillator output (32kHz)
22
NMOD
I
CD Memory mode select
23
NRESET
I
Reset
24
DMOD
I
Silial writing mode
25
VREF+
-
A/D converter reference
voltage
voltage
26
KEYSW
A/D Key input
27
REGION
A/D Aria/Model select
28
PDET
A/D Main voltage check
29
CRT
A/D CR timer
30
NC
I
N.C.
31
CD_OPEN
O CD open switch function
32
CS_CLOSE
O CD close switch function
33
AG_DATA
O ASP data output
34
AG_CLK
O ASP clock output
35
PLL_D0
I/O PLL data input
36
PLL_D1
O/I PLL data output
37
PLL_CLK
O/I PLL CLK
38
PLL_CE
O/I PLL chip select output
39
MCLK
O/I CD LSI command clock
40
MDATA
O/I CD LSI command data
41
STATUS
I/O CD status
42
MLD
O/I CD LSI command load
43
REST_SW
I/O CD travers limit switch
44
CD_RESET
O CD reset switch
45
MUTE_A
I/O Audio Mute Output (L: MUTE
ON)
46
NC(EX_BASS)
I
N.C.
47
NC
I
N.C.
48
REM_IN
I
Remocon input
49
ACDET
I
Ac detection
50
BLKCK
I/O CD subcode block clock input
51
PCONT
O Power control output
52
CD_SET1
I
CD setting 1
53
CD _SET2
I
CD setting 2
54
CD_SET3
I
CD setting 3
55
NC(REC_H)
I
Not used. Connected with
GND exterminally through
resistance.
GND exterminally through
resistance.
56
NC(TAPE_L)
I
N.C.
57
E_CS
O EEPROM chip select
58
E_DATA
I/O EEPROM DATA
59
E_CLK
O EEPROM CLOCK
60
NC(TEST1)
I
TEST 1 terminal
61
NC(TEST2)
I
TEST 2 terminal
62
NC(JOG1)
I
Not used
63
NC(JOG2)
I
Not used
64
STBY_LED
O Standby_LED
Pin No.
Mark
I/O
Function
65
NC(AUX_DET)
I
Not used
66
NC
I
Not used
67
NC
I
Not used
68
NC
I
Not used
69-80
NC
I
Not used
81-100
SEG19-SEG0
O LCD Segment Output
17 Terminal Functions of ICs
39
SC-EN25P / SC-EN26P / SC-EN27PC
Notes:
· Important safety notice:
· Important safety notice:
Components
identified
by
mark
have
special
characteristics important for safety.
Furthermore, special parts which have purposes of fire-
retardant (resistors), high-quality sound (capacitors), low-
noise (resistors), etc. are used.
When replacing any of these components, be sure to use
only manufacturers’s specified parts shown in the parts list.
Furthermore, special parts which have purposes of fire-
retardant (resistors), high-quality sound (capacitors), low-
noise (resistors), etc. are used.
When replacing any of these components, be sure to use
only manufacturers’s specified parts shown in the parts list.
· Warning: This product uses a laser diode. Refer to caution
statements on “Precaution of Laser Diode”
· Capacitor values are in microfarad (µF) unless specified
otherwise, P=Pico-farads(pF); Farads.
· Resistance values are in ohms, unless specified otherwise,
1K=1,000(ohms).
· The marking (RTL) indicates the Retention Time is limited
for this item. After the discontinuation of this assembly in
production, it will no longer be available.
production, it will no longer be available.
· All parts are supplied by ASPC.
· The parenthesized indications in the Remarks column
· The parenthesized indications in the Remarks column
specify the areas. (Refer to the cover page for area.)
Parts without these indications can be used for all areas.
−
−
−
−
− (25P): SA-EN25P
−
−
−
− (26P): SA-EN26P
−
−
−
− (27PC): SA-EN27PC
18.1. SA-EN25P,SA-EN26P and SA-
EN27PC
Ref.
No.
Part No.
Part Name &
Description
Description
Pcs
Remarks
REP3876B
CD P.C.B. ASS’Y
(RTL)
(25P)
(26P)
REP3875B
CD P.C.B. ASS’Y
(RTL)(27PC)
C704
ECEA0JKA331B 6.3V 330U
1
C705
F1H1C104A042 16V 0.1U
1
C707
F1H1C104A042 16V 0.1U
1
C709
ECEA0JKA101B 6.3V 100U
1
C716
ECUV1C333KBV 16V 0.033U
1
C717
ECUVNC154KBV 16V 0.15U
1
C718
ECUV1H272KBV 50V 2700P
1
C719
ECUV1H332KBV 50V 3300P
1
C720
ECEA0JKA330B 6.3V 33U
1
C721
ECUV1H472KBV 50V 4700P
1
C722
ECUV1H821JCV 50V 820P
1
C723
F1H1C104A042 16V 0.1U
1
C724
F1H1C104A042 16V 0.1U
1
C726
ECUV1H471JCV 50V 470P
1
C727
ECUV1C473KBV 16V 0.047U
1
C729
F1H1C104A042 16V 0.1U
1
C730
ECUV1H821KBV 50V 820P
1
C731
ECUV1C223KBV 16V 0.022U
1
C732
F1H1C104A042 16V 0.1U
1
C733
ECUV1H102KBV 50V 1000P
1
C734
ECBT1H104KB5 50V 0.1U
1
C735
ECEA0JKA101B 6.3V 100U
1
C736
ECUV1C823KBV 16V 0.082U
1
C737
ECEA0JKA101B 6.3V 100U
1
(25P)(26P)
C738
ECEA0JKA221B 6.3V 220U
1
C739
F1H1C104A042 16V 0.1U
1
C740
ECUV1E103KBN 25V 0.01U
1
Ref.
No.
Part No.
Part Name &
Description
Description
Pcs
Remarks
C741
ECUV1H102KBV 50V 1000P
1
C742
ECUV1H102KBV 50V 1000P
1
C743
ECEA0JKA331B 6.3V 330U
1
C744
ECUV1H221KBV 50V 220P
1
C745
ECUV1H220JCV 50V 22P
1
C746
ECUV1H220JCV 50V 22P
1
C747
F1H1C104A042 16V 0.1U
1
C748
ECUV1H221KBV 50V 220P
1
C749
F1D1H221A012 50V 220P
1
C750
ECUV1E103KBV 25V 0.01U
1
C751
F1D1H471A012 50V 470P
1
C752
F1H1C104A042 16V 0.1U
1
C753
ECEA0JKA101B 6.3V 100U
1
C754
ECUV1C393KBV 16V 0.039U
1
C756
F1H1C104A042 16V 0.1U
1
C757
F1H1C104A042 16V 0.1U
1
C762
ECEA0JKA100B 6.3V 10U
1
(27PC)
CN701
K1MN16B00154 CONNECTOR
1
CN702
REE1362
CD SERVO FFC
1
IC700
BA5948FPE2
IC
1
IC701
MN6627552CB
IC
1
(25P)(26P)
IC701
MN6627953HB
IC
1
(27PC)
Q700
2SB0709A0L
TRANSISTOR
1
R704
ERDS2TJ5R6T
1/4W 5.6
1
R705
ERJ3GEYJ562V 1/10W 5.6K
1
R706
ERJ3GEYJ822V 1/10W 8.2K
1
R707
ERJ3GEYJ822V 1/10W 8.2K
1
R708
ERJ3GEYJ562V 1/10W 5.6K
1
R710
ERJ3GEYJ101V 1/10W 100
1
R711
ERJ3GEYJ822V 1/10W 8.2K
1
R712
ERJ3GEYJ101V 1/10W 100
1
R713
ERJ3GEYJ682V 1/10W 6.8K
1
R714
ERJ3GEYJ223V 1/10W 22K
1
R715
ERJ3GEYJ102V 1/10W 1K
1
R716
ERJ3GEYJ332V 1/10W 3.3K
1
R717
ERJ3GEYJ562V 1/10W 5.6K
1
R718
ERJ3GEYJ5R6V 1/10W 5.6
1
R719
ERJ3GEYJ683V 1/10W 68K
1
R720
ERJ3GEYJ562V 1/10W 5.6K
1
R721
ERJ3GEYJ4R7V 1/10W 4.7
1
R722
ERJ3GEYJ563V 1/10W 56K
1
R723
ERJ3GEYJ102V 1/10W 1K
1
R724
ERJ3GEYJ332V 1/10W 3.3K
1
R725
ERJ3GEYJ273V 1/10W 27K
1
R726
ERJ3GEYJ102V 1/10W 1K
1
R727
ERJ3GEYJ393V 1/10W 39K
1
R728
ERJ3GEYJ562V 1/10W 5.6K
1
R729
ERJ3GEYJ562V 1/10W 5.6K
1
R730
ERJ3GEYJ562V 1/10W 5.6K
1
R731
ERJ3GEYJ823V 1/10W 82K
1
R732
ERJ3GEYJ821V 1/10W 820
1
R733
ERJ3GEYJ5R6V 1/10W 5.6
1
R734
ERJ3GEYJ101V 1/10W 100
1
R735
ERJ3GEYJ683V 1/10W 68K
1
R736
ERJ3GEYJ683V 1/10W 68K
1
R737
ERJ3GEYJ102V 1/10W 1K
1
R738
ERJ3GEYJ102V 1/10W 1K
1
R739
ERJ3GEYJ683V 1/10W 68K
1
R740
ERJ3GEYJ105V 1/10W 1M
1
(27PC)
R741
ERJ3GEYJ101V 1/10W 100
1
R742
ERJ3GEYJ102V 1/10W 1K
1
R743
ERJ3GEYJ102V 1/10W 1K
1
R744
ERJ3GEY0R00V 1/10W 0
1
R747
ERJ3GEYJ683V 1/10W 68K
1
R748
ERJ3GEYJ683V 1/10W 68K
1
R749
ERJ3GEYJ683V 1/10W 68K
1
18 Replacement Parts List
40
SC-EN25P / SC-EN26P / SC-EN27PC
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