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Table Of Contents

COVER
Service Manual
1 Note
2 Location of Controls
TOP NEXT
3 To Supply Power Source
3.1 Power Supply to Main AD9907176C2
Circuit
3.2 Operation Check
4 Operation Checks and
Component
ReplacementProcedures
5 Type Illustration of ICs,
Transistors and Diodes
6 Schematic Diagram Control Amplifier
6.1 Schematic Diagram
Notes q SU-C909U
6.2 Schematic Diagram
7 Printed Circuit Board Colour
Diagram
8 Block Diagram (K)..........Black Type
9 Wiring Connection
Diagram Area
10 Measurements and
Adjustments (E)..........Europe and Russia.
10.1 Measurement
instruments and Special tools
10.2 Output Voltage
Adjustment
11 Terminal Function of
ICs
11.1 IC701
(M38503M2404F) : Micro
Computer
12 Replacement Parts List
PV
13 Cabinet Parts Location
PV
14 Packaging
© 1999 Matsushita Electric Industrial Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law.




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TOP NEXT
Table Of Contents
COVER

1 Note

2 Location of Controls

3 To Supply Power Source

3.1 Power Supply to Main Circuit

3.2 Operation Check

4 Operation Checks and Component ReplacementProcedures

5 Type Illustration of ICs, Transistors and Diodes

6 Schematic Diagram

6.1 Schematic Diagram Notes

6.2 Schematic Diagram

7 Printed Circuit Board Diagram

8 Block Diagram

9 Wiring Connection Diagram

10 Measurements and Adjustments

10.1 Measurement instruments and Special tools

10.2 Output Voltage Adjustment

11 Terminal Function of ICs

11.1 IC701 (M38503M2404F) : Micro Computer
12 Replacement Parts List PV


13 Cabinet Parts Location PV

14 Packaging
Service Manual
TOP NEXT

AD9907176C2




Control Amplifier

q SU-C909U

Colour

(K)..........Black Type

Area

(E)..........Europe and Russia.
© 1999 Matsushita Electric Industrial Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law.




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1 Note
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Refer to the servise manual for Model No. SE-A909S (ORDER No. AD9907177C2) for information
on Accessories, Connections, Operations and Packaging.

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2 Location of Controls
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3 To Supply Power Source
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This unit SU-C909U is designed to operate on power supplied from the Power Amplifier SE-A909S.

When operating the unit SU-C909U alone for testing and servicing, without having power supplied
from the Power Amplifier SE-A909S, use the following method.

3.1 Power Supply to Main Circuit

3.2 Operation Check

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3.1 Power Supply to Main Circuit
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1. Apply 10 V AC power to the section between the point TP1 and the point TP2 . Shown in
Fig.1

2. Connect the DC+12 V to+15 V (more than 0.1 A) to the point TP5 , and the GND terminal to
the point TP4 using the DC power supply. Shown in Fig.1

3. Connect the DC -12 V to -15 V (more than 0.1 A) to the point TP3 , and the GND terminal to
the point TP4 using the DC power supply. Shown in Fig.1

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3.2 Operation Check
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1. Input a signal (1 kHz, 100 mV) to the each line-in terminal.

2. Connect the oscilloscope or the speaker with the built-in amplifier to the PRE OUT terminals and
check if the signals are outputting from this unit.

Fig.1




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4 Operation Checks and Component
Replacement/Procedures
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5 Type Illustration of ICs, Transistors and
Diodes
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6 Schematic Diagram
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6.1 Schematic Diagram Notes

6.2 Schematic Diagram

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6.1 Schematic Diagram Notes
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q This schematic diagram may be modified at any time with the development of new
technology.

Notes:

r S801:

VGCA switch (




)

r S802:

Tape monitor switch (TAPE MONITOR)

r S804:

Input select switch (SELECTOR)

r S805:

Unit on/off switch (




/I)

r VR301:

Volume control VR (VOLUME)
r VR311:

Output voltage adjustment VR (L ch)

r VR312:

Output voltage adjustment VR (R ch)

r VR401:

Balance control VR (BALANCE)

r VR402:

Tone control VR (BASS)

r VR403:

Tone control VR (TREBLE)

q Indicated voltage values are the standard values for the unit measured by the DC electronic
circuit tester (high-impedance) with the chassis taken as standard. Therefore, there may exist
some errors in the voltage values, depending on theinternal impedance of the DC circuit tester.

No mark : Power ON

q 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 components, be sure to use only manufacturers specified parts shown
in the parts list.

q Caution!

IC and LSI are sensitive to static electricity.

Secondary trouble can be prevented by taking care during repair.

Cover the parts boxes made of plastics with aluminum foil.
Ground the soldering iron.

Put a conductive mat on the work table.

Do not touch the legs of IC or LSI with the fingers directly.

q Voltage and signal line

q




: Positive voltage line

q




: Negative voltage line

q




: Phono signal line

q




: Tape rec signal line

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6.2 Schematic Diagram
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7 Printed Circuit Board Diagram
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8 Block Diagram
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9 Wiring Connection Diagram
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10 Measurements and Adjustments
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10.1 Measurement instruments and Special tools

10.2 Output Voltage Adjustment

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10.1 Measurement instruments and Special tools
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q AC electric voltmeter (AC EVM)

q AF oscillator

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10.2 Output Voltage Adjustment
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1. Turn on the power.

2. Select the input source to CD.

3. Connect the measuring instrument as shown in Fig.2

4. Apply 1 kHz, 200 mV signal to CD terminal.

5. Adjust the VOLUME to maximum.

6. Adjust VR311 (L ch) and VR312 (R ch) so that the output voltage to AC 1.00 V±0.2 dB. Shown in Fig.3

Fig.2




q Adjustment Point

Fig.3
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11 Terminal Function of ICs
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11.1 IC701 (M38503M2404F) : Micro Computer

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11.1 IC701 (M38503M2404F) : Micro Computer
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Pin No. Name I/O Function
1 VCC I Power supply (+5 V) terminal
2 VREF I Reference voltage input
3 AGND - GND terminal
4 CS I Chip select signal input
5 NC - Not used, open
6 REMCON I Remote control signal input
7 BACKUP I Power failure detect signal input
8 NC - Not used, open
9 SELDATA O Data signal output for input select IC (IC201 and IC202)
10 SELCLK O Clock signal output for input select IC (IC201 and IC202)
11 SELSTB O Strobe signal output for input select IC (IC201 and IC202)
12 POWERSW I Selector switch (S804) detect signal input
13 LEDCLK O Clock signal output for LED drive IC
14 LEDDATA O Data signal output for LED drive IC
15 CNVSS - Connected to GND
16 VRDOWN O Motor drive signal output (Volume down)
17 VRUP O Motor drive signal output (Volume up)
18 RESET I System reset signal input
19 XIN I Connected to the ceramic oscillator (8 MHz)
20 XOUT O Connected to the ceramic oscillator (8 MHz)
21 GND - GND terminal
22 BATELED - Battery level (empty) LED (D809) drive signal output (Not used, open)
23 BATFLED - Battery level (full) LED (D809) drive signal output (Not used, open)
24 VIALED O VIA LED drive signal output
25 VGALED O VGCA LED drive signal output
26 STABYLED O Stand by LED drive signal output
27 FRNTOUT O Front output control signal output
28 CSWSOUT - Center/S.woofer/Surround output control signal output (Not used, open)
29 PWRRLY O Power control signal output
30 CHRGRLY - Battery charge relay control signal output (Not used, open)
31 BATRLY - Battery drive relay control signal output (Not used, open)
32 VGARLY O VGCA mode relay control signal output
33| NC - Not used, open
36
37 SELPH - Not used, open
38 BATLVL2 - Battery voltage detection (2) signal input (Not used, open)
39 NC - Not used, open
40 RSWAD I Power switch (S805) detect signal input
41 KEYAD I Tape monitor and VGCA switch input
42 BATLVL1 - Battery voltage detection (1) signal input (Not used, open)


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12 Replacement Parts List
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Notes:

q 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 components, be sure to use only manufactures specified parts shown in
the parts list.

q The marking (RTL) indicates that Retention Time is Limited for this item. After the
discontinuation of this assembly in production, the item will continue to be available for a
specific period of time. The retention period of availabilityis dependent on the type of
assembly, and in accordance with the laws governing part and product retention. After the end
of this period, the assembly will no longer be available.

q All parts are supplied by MESA.

Ref. No. Part No. Part Name& Description Pcs. Remarks


1 RKM0078-1K TOP CABINET 1

2 RHD30035-K1 SCREW 4

3 XTBS3+8JFZ1 SCREW 2

4 RGW0229-K KNOB,SELECTOR 1

5 RGW0230-K KNOB,VOLUME 1

6 RKA0053-A FOOT 4

6-1 RMG0270-K RUBBER 4

7 RDG0449 GEAR 2

8 RGB0031-A TECHNICS BADGE 1

9 RGB0112-N VGCA BADGE 1

10 RGG0168C-K PANEL 1

11 RGK0747-S RING ORNAMENT 2
12 RGK1111-K NUT 4

13 RGK1163-K DISPLAY 1 1

14 RGK1164A-K1 DISPLAY 2 1

15 RGL0453-Q PANEL LIGHT 1 2

16 RGL0454-Q PANEL LIGHT 2 2

17 RGP0740A-K SUB GRILL 1

18 RGP0743-K GRILL 1

19 RGU0890-1K BUTTON,POWER 1

20 RGU1712-K BUTTON,OPEN 1

21 RGU1774-S BUTTON,VGCA 1

22 RGW0205-S KNOB, 3

23 RHD26033 SCREW 4

24 RHD26034 SCREW 3

25 RHN90001 NUT 2

26 RKF0593-Q DOOR 1

27 RKG0009 MAGNET 1

28 RKW0273A-K FILTER 1

29 RME0284 SPRING 1

30 RMR1202-K ARM(L) 1

31 RMR1203-K ARM(R) 1

32 RMR1204-K MAGNET HOLDER 1

33 RMR1205-K DAMPER HOLDER 2

34 RMR1206-K DAMPER(R) 1

35 RMR1207-K DAMPER(L) 1

36 XTBS26+8J SCREW 20

37 XTS2+4GFZ SCREW 4

38 SNE2123 SCREW 1

39 XTBS3+8JFZ1 SCREW 10

40 XTB3+20JFZ SCREW 5

41 XTB3+6JFZ SCREW 3


C101,02 ECBT1H221KB5 50V 220P 2
C103,04 ECA1HPXS4R7B 50V 4.7U 2
C107,08 RCE1AKA330BG 10V 33U 2
C113,14 ECQB1H682JF3 50V 6800P 2
C115,16 ECQB1H223JF3 50V 0.022U 2
C117,18 ECEA1VKA4R7B 35V 4.7U 2
C119,20 ECQB1H472JF3 50V 4700P 2
C121,22 ECKR1H103ZF5 50V 0.01U 2
C123,24 ECBT1H102KB5 50V 1000P 2
C201,02 ECBT1H101KB5 50V 100P 2
C203-06 ECCR1H101K5 50V 100P 4
C211,12 ECBT1H101KB5 50V 100P 2
C215 ECBT1H101KB5 50V 100P 1
C217,18 ECBT1C103NS5 16V 0.01U 2
C219,20 ECA1HPXS4R7B 50V 4.7U 2
C221 ECBT1H101KB5 50V 100P 1
C223,24 ECBT1C103NS5 16V 0.01U 2
C225,26 ECA1HPXS4R7B 50V 4.7U 2
C231 ECBT1E103ZF 25V 0.01U 1
C251-58 ECBT1H101KB5 50V 100P 8
C301,02 ECBT1H181KB5 50V 180P 2
C303,04 ECBT1E103ZF 25V 0.01U 2
C305,06 ECA1EPXS100B 25V 10U 2
C351,52 ECA1EPXS100B 25V 10U 2
C353,54 ECCR1H101K5 50V 100P 2
C355,56 ECA1APXS221 10V 220U 2
C357,58 ECBT1H820KB5 50V 82P 2
C359,60 ECBT1H390J5 50V 39P 2
C361,62 ECA1HPXS3R3 50V 3.3U 2
C363,64 ECBT1E103ZF 25V 0.01U 2
C367,68 ECA1EPXS220B 25V 22U 2
C391,92 ECEA0JKS101 6.3V 100U 2
C393,94 ECFR1E104ZF5 25V 0.1U 2
C401,02 ECEA1HKS010 50V 1U 2
C403-06 ECBT1H101KB5 50V 100P 4
C407,08 ECBT1H560J5 50V 56P 2
C409,10 RCE1CKA470BG 16V 47U 2
C411,12 ECBT1E103ZF 25V 0.01U 2
C415,16 ECBT1C222KR5 16V 2200P 2
C417,18 ECBT0J153MS5 6.3V 0.015U 2
C419,20 ECBT1C332KR5 16V 3300P 2
C421,22 ECQV1H823JZ 50V 0.082U 2
C423,24 ECBT0J153MS5 6.3V 0.015U 2
C425,26 ECBT1H121KB5 50V 120P 2
C427,28 ECEA1HKS010 50V 1U 2
C513,14 ECEA1HPS010 50V 1U 2
C515,16 ECCR1H101J5 50V 100P 2
C519,20 ECA1EPXS100B 25V 10U 2
C521,22 ECA1CPXS470B 16V 47U 2
C523,24 ECCR1H331J5 50V 330P 2
C601 ECEA1HKS010 50V 1U 1
C607,08 ECA1EPXS470B 25V 47U 2

C651 ECA1EM222 25V 2200U 1

C655 RCE1CKA470BG 16V 47U 1
C656 ECQV1H104JM3 50V 0.1U 1
C658 ECBT1C103NS5 16V 0.01U 1
C701,02 ECA0JM102 6.3V 1000U 2
C703 RCE1HKAR47BG 50V 0.47U 1
C704 ECEA1HKS2R2 50V 2.2U 1
C705,06 ECBT1C103NS5 16V 0.01U 2
C707,08 RCE1HKAR22BG 50V 0.22U 2
C709 ECBT1C103NS5 16V 0.01U 1
C801 ECEA0JKS101 6.3V 100U 1
C802 ECBT1E103ZF 25V 0.01U 1
C803 ECBT1H104ZF5 50V 0.1U 1
C804,05 ECBT1H101KB5 50V 100P 2
C806 ECBT1H104ZF5 50V 0.1U 1


CN301 RJS1A6604 CONNECTOR(4P) 1
CN302 RJS1A6607T1 CONNECTOR(7P) 1
CN303 RJS1A6604 CONNECTOR(4P) 1
CN401 RJS1A6607T1 CONNECTOR(7P) 1
CN701 RJS7T4ZA CONNECTOR(7P) 1
CN702 RJS8T4ZA CONNECTOR(8P) 1


D201,02 MA165 DIODE 2
D501 MA165 DIODE 1
D521 MA165 DIODE 1
D601 MA165 DIODE 1
D607 MA165 DIODE 1
D651-54 RL1N4003N02 DIODE 4

D655,56 MA167 DIODE 2

D658 MA4056M DIODE 1

D701 1SS291TA DIODE 1
D702 MA165 DIODE 1
D704 1SS291TA DIODE 1
D705-07 MA165 DIODE 3
D709,10 MA165 DIODE 2
D712 MA165 DIODE 1
D801-04 SLR325VCT31 LED 4
D806-08 SLR325VCT31 LED 3
D811 SLR325DCT31 LED 1
D812,13 SLR325VCT31 LED 2
D814,15 SLR325DCT31 LED 2
D816-18 SLR325VCT31 LED 3


IC101 AN6558F IC 1
IC201 TC9163N IC 1
IC202 TC9164N IC 1
IC311 UPC4570C IC 1
IC351 UPC4570C IC 1
IC391 BA6218 IC 1
IC401 NJM4580EDTE1 IC 1
IC511 UPC4570C IC 1
IC601 M5F78M05L IC 1

IC701 M38503M2404F IC 1
IC801 BU2090AFE2 IC 1


JK201 SJF3069-11N JACK,PHONO 1
JK202-05 SJF3069N JACK,IN/OUT 4
JK501 SJF3069N JACK,PRE/OUT 1
JK801 RJS1D0706 JACK(7P) 1


L391,92 ELEXT1R0KA9 COIL 2
L601-07 ELEXT1R0KA9 COIL 7
L701 ELEXT101KA9 COIL 1
L801 ELEXT101KA9 COIL 1
L802 ELEXT100KA9 COIL 1


P1 RPG4512 PACKING CASE 1

P2 RPN1206 PAD 1

P3 SPP756 PROTECTION COVER 1


PCB1 REP2873A-M MAIN PCB 1 (RTL)
PCB2 REP2841D-S PANEL PCB 1 (RTL)


Q201 DTC124EST TRANSISTOR 1
Q202 DTA124ESTP TRANSISTOR 1
Q203 DTC124EST TRANSISTOR 1
Q204 DTA124ESTP TRANSISTOR 1
Q501 DTA124ESTP TRANSISTOR 1
Q502 DTC124EST TRANSISTOR 1
Q521 DTC124EST TRANSISTOR 1
Q522 DTA124ESTP TRANSISTOR 1
Q601,02 DTA124ESTP TRANSISTOR 2

Q603 DTC144ESTP TRANSISTOR 1

Q701 DTC114ESTP TRANSISTOR 1
Q702 DTC114YSTP TRANSISTOR 1
Q710 DTC114YSTP TRANSISTOR 1


R101,02 ERDS2FJ152 1/4W 1.5K 2
R103,04 ERDS2FJ224 1/4W 220K 2
R105,06 ERDS2FJ563 1/4W 56K 2
R117,18 ERDS2FJ181 1/4W 180 2
R123,24 ERDS2FJ680 1/4W 68 2
R125,26 ERDS2FJ123 1/4W 12K 2
R127,28 ERDS2FJ184 1/4W 180K 2
R129,30 ERDS2FJ563 1/4W 56K 2
R131,32 ERDS2FJ102 1/4W 1K 2
R201-06 ERDS2FJ102 1/4W 1K 6
R211,12 ERDS2FJ102 1/4W 1K 2
R215-17 ERDS2FJ103 1/4W 10K 3
R219-21 ERDS2FJ103 1/4W 10K 3
R222,23 ERDS2FJ102 1/4W 1K 2
R224 ERDS2FJ472 1/4W 4.7K 1
R227 ERDS2FJ472 1/4W 4.7K 1
R251-58 ERDS2FJ102 1/4W 1K 8
R301,02 ERDS2FJ104 1/4W 100K 2
R315,16 ERDS2FJ272 1/4W 2.7K 2
R351,52 ERDS2FJ102 1/4W 1K 2
R353,54 ERDS2FJ333 1/4W 33K 2
R355,56 ERDS2FJ272 1/4W 2.7K 2
R357,58 ERDS2FJ224 1/4W 220K 2
R361,62 ERDS2FJ183 1/4W 18K 2
R363,64 ERDS2FJ103 1/4W 10K 2
R365,66 ERDS2FJ102 1/4W 1K 2
R391 ERDS1FJ100 1/2W 10 1

R401,02 ERDS2FJ472 1/4W 4.7K 2
R403-06 ERDS2FJ224 1/4W 220K 4
R407,08 ERDS2FJ392 1/4W 3.9K 2
R409,10 ERDS2FJ102 1/4W 1K 2
R411,12 ERDS2FJ183 1/4W 18K 2
R413,14 ERDS2FJ392 1/4W 3.9K 2
R415-18 ERDS2FJ223 1/4W 22K 4
R503,04 ERDS2FJ332 1/4W 3.3K 2
R513,14 ERDS2FJ104 1/4W 100K 2
R515,16 ERDS2FJ224 1/4W 220K 2
R521,22 ERDS2FJ331 1/4W 330 2
R523,24 ERDS2FJ473 1/4W 47K 2
R525,26 ERDS2FJ101 1/4W 100 2
R655,56 ERDS2FJ103 1/4W 10K 2
R701 ERDS2FJ681 1/4W 680 1
R702,03 ERDS2FJ103 1/4W 10K 2
R704,05 ERDS2FJ104 1/4W 100K 2
R706 ERDS2FJ103 1/4W 10K 1
R707-09 ERDS2FJ104 1/4W 100K 3
R710 ERDS2FJ103 1/4W 10K 1
R723-25 ERDS2FJ103 1/4W 10K 3
R726 ERDS2FJ102 1/4W 1K 1
R728 ERDS2FJ104 1/4W 100K 1
R801 ERDS2FJ821 1/4W 820 1
R802 ERDS2FJ102 1/4W 1K 1
R803 ERDS2FJ122 1/4W 1.2K 1
R804 ERDS2FJ152 1/4W 1.5K 1
R805 ERDS2FJ182 1/4W 1.8K 1
R806 ERDS2FJ222 1/4W 2.2K 1
R807 ERDS2FJ332 1/4W 3.3K 1
R808 ERDS2FJ472 1/4W 4.7K 1
R809 ERDS2FJ682 1/4W 6.8K 1
R810 ERDS2FJ123 1/4W 12K 1
R811 ERDS2FJ223 1/4W 22K 1
R812 ERDS2FJ561 1/4W 560 1
R813,14 ERDS2FJ181 1/4W 180 2
R815 ERDS2FJ331 1/4W 330 1
R819 ERDS2FJ271 1/4W 270 1
R820 ERDS2FJ223 1/4W 22K 1
R821 ERDS2FJ123 1/4W 12K 1
R822 ERDS2FJ331 1/4W 330 1
R823 ERDS2FJ181 1/4W 180 1
R824,25 ERDS2FJ331 1/4W 330 2
R826,27 ERDS2FJ101 1/4W 100 2
R828,29 ERDS2FJ103 1/4W 10K 2
R830 ERDS2FJ331 1/4W 330 1


RL201 ,02 RSY0020M-R RELAY 2
RL501 RSY0020M-R RELAY 1
RL521 RSY0020M-R RELAY 1


S801,02 EVQ21405R SW,PUSH 2
S804 RSR9A001-A SW,SELECTOR 1
S805 RSP2B023-A SW,UNIT ON/OFF 1


TP1-P5 QJT1090 TEST POINT 5


VR301 RRV16J05Z24A VR,VOLUME 1
VR311, 12 EVNDXAA00B23 VR,OUTPUT VOLT.ADJ. 2
VR401 EVJ02QF01G15 VR,BALANCE 1
VR402 ,03 EVJYA1F01C15 VR,BASS/TREBLE 2


X701 RSXY8M00D01T OSCILLATOR 1


Z801 RCD12042TH COMPONENT COMBINATION 1


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13 Cabinet Parts Location
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14 Packaging
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TO
POWER AMPLIFIER TAPE2
(SE-A909S) PRE OUT TAPE1 /MD DVD AUX CD TUNER PHONO




A MAIN P.C.B.




CN701 CN702
1. . . . .7 1. . . . . .8
CN302 CN301
CN401 1. . . . .7 1. .4
1. . . . .7
CN303
1
.
.
4




POWER
F SWITCH P.C.B.
W703A 1 1. . . . .7 1. .4
.
BLACK . W302 W301
3 4
.
RED 1
W303




C VOLUME P.C.B.

3.1
W703B G SELECTOR P.C.B.
W704B
3.1




W705A
RED 1 1. . . . . .8
. 1. . . . .7 1. . . . . .8
BLACK
3
W701 W702
W704A



D LED P.C.B.



1. . . . .7
W401



1. . . . . .8
W705B

OPERATION B TONE P.C.B.
E P.C.B.
A B C D E F



1
A MAIN P.C.B. TAPE2/MD TAPE1
PHONO TUNER CD DVD AUX REC(OUT) PLAY(IN) REC(OUT) PLAY(IN)




R L R L R L R L R L R L R L R L R L

E E E E E E E E E

2 JK201 JK202 R206 JK203 JK204 JK205




C212
R212




R256
R253




R257
R258
R255
R254
R203
R204




R251
R252
R202
R205
R102




R211
R201
R101
R103
R104




C202
C102


C101




C201




C251




C255
C254




C253

C256




C258




C257
C252
C211
C204



C203
C206

C205 J J
C103
C104

R106



R105


J J




J
R514
E203




C514
C107
C108




R117
R118




J
J
J

J
J




C513
R513
J
C124 C123 J J J




J
3




C219
W201




C217




J
J J J
3




J
J
5 6 7 8 J J 2
J




J
1




C224
C226
J J J
J




C520
IC101 J




R224
R216




J
J J
4 3 2 1 R220 R215
R219 J J
C122




R222
J
C121 15 16 171819 20 212223 242526 27 28
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