SERVICE NOTES Issued by RJA TABLE OF CONTENTS CAUTIONARY NOTES ...................................................2 SPECIFICATIONS.............................................................2 LOCATION OF CONTROLS ..........................................3 LOCATION OF CONTROLS PARTS LIST ...................3 EXPLODED VIEW (CABINET).......................................4 EXPLODED VIEW PARTS LIST (CABINET) ...............5 EXPLODED VIEW (CHASSIS)........................................6 EXPLODED VIEW PARTS LIST (CHASSIS).................7 PARTS LIST........................................................................8 CHECKING THE VERSION NUMBER.......................12 TEST MODE.....................................................................12 BLOCK DIAGRAM.........................................................14 CIRCUIT BOARD (MAIN BOARD 1)..........................16 CIRCUIT BOARD (MAIN BOARD 2)..........................17 CIRCUIT BOARD (PANEL BOARD)...........................18 CIRCUIT DIAGRAM(MAIN 1 & IN & PHO).............20 CIRCUIT DIAGRAM(MAIN 2 & PANEL)..................22 CIRCUIT DIAGRAM(AMP)..........................................24 CIRCUIT DIAGRAM(MAIN 3 & PS1) .........................26
Revise Information 2006/07/25 Revised a few miscopies in EXPLODED VIEW PARTS LIST (CABINET) (p. 5) 2006/12/01 Revised a few miscopies in EXPLODED VIEW PARTS LIST (CABINET) (p. 5) and PARTS LIST (p. 11).
CAUTIONARY NOTES PARTS LIST Due to one or more of the following reasons, parts with parts code ******** cannot be supplied as service parts. · · · Part supplied only as a component in a complete assembly Copyright does not permit the part to be supplied Part is sold commercially
Option Foot switch FS-5U (BOSS) * In the interest of product improvement, the specifications and/or appearance of this unit are subject to change without prior notice.
Connectors INPUT Jack (1/4" phone type) RECORDING OUT/PHONES Jack (Stereo 1/4" phone type) FOOT SW Jack (EFX, DELAY/REVERB) (1/4" phone type) EXT SPEAKER Jack (1/4" phone type) LINE OUT Jack (1/4" phone type) TUNER OUT Jack (1/4" phone type) BALANCED OUT Jack (XLR type)
Power Supply AC 117 V, AC 230 V or AC 240 V
Power Consumption 28 W
Dimension 407 (W) x 310 (D) x 469 (H) mm 16-1/16 (W) x 12-1/4 (D) x 18-1/2 (H) inches
2
Oct.2004(Jul.2006)
CB-100
LOCATION OF CONTROLS fig.CB-100_panel.eps
3
5
7
1
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3
4
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6
8
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LOCATION OF CONTROLS PARTS LIST No 1 2 3 4 PART CODE 13449146 22150756 SD000099 SD000082 SD000045 SD000488 17048631 17048630 SD000043 SD000483 SD000487 17048631 17048630 SD000043 03782367 03782323 13449252 22150756 13449145 22150756 SD000175 SD000485 SD000484 03567001 00122123 CATEGORY JACK,EXT TERMINAL SCREWS SWITCH KNOB,BUTTON DIODE SWITCH SCREWS SCREWS KNOB,BUTTON MISCELLANEOUS POTENTIOMETER SCREWS SCREWS KNOB,BUTTON SWITCH MISCELLANEOUS JACK,EXT TERMINAL SCREWS JACK,EXT TERMINAL SCREWS JACK,EXT TERMINAL SCREWS SCREWS SWITCH JACK,EXT TERMINAL PART NAME 6.5MM JACK JACK NUT 2 PUSH SWITCH PUSH BUTTON LED RED ROTARY SWITCH VR ACCESSORY WASHER M9 VR ACCESSORY NUT M9 KNOB SW KNOB HIMERON ROTARY POTENTIOMETER VR ACCESSORY WASHER M9 VR ACCESSORY NUT M9 KNOB SEESAW SWITCH SW HOLDER 6.5MM JACK JACK NUT 2 6.5MM JACK JACK NUT 2 JACK JACK WASHER JACK NUT SLIDE SWITCH XLR CONNECTOR DESCRIPTION YKB21-5012 (W/SW) ESB64619 L-34HDSL SR1712-0108-15F0A-N9-N Q'TY 1 1 2 2 6 1 1 1 1 1 9 9 9 9 1 1 1 1 4 4 1 1 1 2 1
ATTACHING OF HIMERON 10x115xt0.25 W/ADH on TRIM SASH HIMERON 10x115xt0.25 W/ADH TRIM SASH
THE CONNECTION OF SPEAKER TERMINAL W8(BLACK) +
b
6 7 4 b 14
3
W7(RED) BOTTOM VIEW
c c
THE ANGLE OF SPEAKER UNIT
1 Refer to "EXPLODED VIEW (CHASSIS)". Remove the 5 , 2 , 13 before removing the CHASSIS. Once you remove 13 , you can't use it any more. When you remove the CHASSIS, order 13 for service.
LOGO (Roland) W/ADH 6 X 50 X 0.5T 23X15T(75) W/HOT STAMP 12X20H CUT W/ADH 10 X 115 X 0.25T
[Screws] No a b c d e f g h i j PART CODE 40010701 SD000432 40010145 40010545 SD000019 SD000048 40230778 40011689 SD000370 SD000430 SD000068 PART NAME SCREW 4X35 SCREW 3X16 SCREW M4X25 SCREW M4X25 SCREW M5X35 SCREW M3X8 SPEED NUT M3 PLATE WASHER RESIN WASHER SCREW 4X25 DESCRIPTION TRUSS TAPTITE A1 BZC TRUSS TAPTITE A1 BZC ORIGINAL TRASS MACHINE SCREW BZC TRUSS HEAD SPECIAL FE BZC BINDING MACHINE SCREW BZC OVALHEAD MACHINE BZC OVALHEAD MACHINE BZC FSN-3001 4.2 X 10 X 0.5T 11 X 4.1 X 1T TRUSS TAPTITE A1 BZC Q'TY 4 29 12 8 4 2 2 4 4 4
5
Oct.2004(Jul.2006)
CB-100
EXPLODED VIEW (CHASSIS) fig.CB100-chassis-e.eps
5 6 21
8 12
7
n 9 j c 12
b
m 13 16 L f
b
3
4 11 18
b
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k k 15 h a h
a
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19 e 14 b g 10
i 17 .
4 a 20
1
6
Oct.2004(Jul.2006)
CB-100
EXPLODED VIEW PARTS LIST (CHASSIS) [Parts] No 1 2 PART CODE SD000184 SD000185 SD000177 SD000178 SD000176 SD000180 SD000179 SD000161 SD000182 03782367 03782323 SD000043 SD000082 22360705 12369410RT SD000483 22150756 SD000484 SD000485 SD000153 02566301 SD000514 SD000514 SD000514 SD000514 SD000514 SD000519 PART NAME TRANSFORMER 110V/117V TRANSFORMER 230V/240V AC CORD 100V AC CORD 117V AC CORD 230V AC CORD 230VE AC CORD 240V CHASSIS STAY SEESAW SW SW HOLDER R-KNOB PUSH BUTTON CORD HOOK AC CORD HOLDER SW KNOB HIMERON JACK NUT 2 JACK NUT JACK WASHER CABLE CLAMP AC CORD BAND MAIN PCB ASSY MAIN PCB ASSY MAIN PCB ASSY MAIN PCB ASSY MAIN PCB ASSY PANEL PCB ASSY DESCRIPTION PT-BG413 100V/117V PT-BG413 230V/240V SP-18A WITH TERMINAL SP-301 WITH TERMINAL SP-023 WITH TERMINAL SP-60 WITH TERMINAL SP-502B WITH TERMINAL Q'TY 1 1 1 1 1 1 1 1 3 1 1 10 2 2 2 1 6 1 1 1 1 1 1 1 1 1 1
[Screws] No a b c d e f g h I j k L m n PART CODE 40011423 40012867 40011312 40237101 40013012 40010301 40011756 40011767 22150501 17048630 40011889 40011878 17048631 SD000103 PART NAME SCREW M3X6 SCREW M3X8 SCREW 3X8 SCREW M3X8 SCREW M4X10 SCREW M3X20 FLANGE HEX NUT M3 FLANGE HEX NUT M4 STAND OFF VR ACCESSORY NUT M9 EXTERNAL TOOTH WASHER M4 EXTERNAL TOOTH WASHER M3 VR ACCESSORY WASHER M9 SCREW M4X25 DESCRIPTION PAN MACHINE W/SW ZC PAN MACHINE W/SW+PW ZC BINDING TAPTITE P BZC PAN MACHINE W/SW+PW FE BZC PAN MACHINE W/SW+PW FE BZC BINDING MACHINE BZC FE ZC FE ZC M3 L10C FECM FECM PAN PACHINE W/SW BZC Q'TY 7 16 2 4 4 2 2 2 4 10 2 1 10 2
7
Oct.2004(Jul.2006)
CB-100
PARTS LIST fig.part1e
SAFETY PRECAUTIONS: The parts marked have safety-related characteristics. Use only listed parts for replacement.
Due to one or more of the following reasons, parts with parts code ******** cannot be supplied as service parts. · Part supplied only as a component in a complete assembly · Copyright does not permit the part to be supplied · Part is sold commercially
NOTE: The parts marked # are new. (initial parts)
The description "Q'TY" means a necessary number of the parts per one product.
on P=PANEL PCB, on M=MAIN BOARD. CASING # # SD000160 CABINET ASSY NOTE: Spare parts for CABINET ASSY includes the following parts. SD000162 CORNER PROTECTOR SD000463 HANDLE HOLDER SD000462 HANDLE PLATE SD000461 HANDLE RUBBER SD000078 RUBBER FOOT 23X15T(75) SD000066 TRIM SD000167 GRILL ASSY NOTE: Spare parts for GRILL ASSY includes the following parts. SD000231 BASS BADGE W/HOT STAMP SD000017 BADGE LOGO (Roland) 1 4 2 1 1 4 1 1 1 1
SWITCH 03567001 SD000488 03782367 SD000099 SLIDE SWITCH ROTARY SWITCH SEESAW SWITCH PUSH SWITCH SSAB110100 SR1712-0108-15F0A-N9-N JW-L11RKK ESB64619 SSW1,SSW2 on M RSW on P POWER SWITCH PSW1,PSW2 on P 2 1 1 2
JK3 on M JK1 on M JK4,JK5,JK7,JK8 on M JK2 on M JK10 on M
1 1 4 1 1
SPEAKER,BUZZER # SD000181
SPEAKER 12INCH (8OHM)
SPK-BG413
1
PWB ASSY # #
SD000519 PANEL PCB ASSY SD000514 MAIN PCB ASSY NOTE: Spare parts for MAIN PCB ASSY includes the following parts. ******** PS-1 BOARD ******** IN BOARD ******** AMP BOARD ******** PHO BOARD
1 1 1 1 1 1
IC 03890123 SD000493 SD000494 03015923 03015912 01678512 SD000183 UPD780034AGK-B23-9ET NJM78M12DLA NJM79M12DLA S-80130ANMC REGULATOR UPC2905T-T2 UPC2933T-T2 TA2022 IC (CPU) IC (V RGL) IC (V RGL) IC (RESET) IC (REGULATOR) IC (REGULATOR) IC (POWER AMP) IC1 on M IC15 on M IC16 on M IC3 on M IC9 on M IC9 on M IC203 on M 1 1 1 1 1 1 1
#
8
Oct.2004(Jul.2006) IC 15289154 02565501 03676990 15169596 00346445 01125012 15289105 02451434 02678945 UPC4072G2-E1 TC220CCA0AF-B01 AK4386VTP-E2 TC74HC4051AP NJM2100M(TE3) NJM4556AM UPC4570G2-E2 AK4552VT BU2090 IC (JFET OP) IC (DSP) IC (DA) IC (CMOS) IC (BIPOLAR OP AMP) IC (BIPOLAR OP AMP) IC (BIPOLAR OP AMP) IC (AD/DA) IC IC10 on M IC2 on M IC5 on M IC7 on P IC12 on M IC17 on M IC11,IC13,IC14,IC202 on M IC4 on M IC8 on P
CB-100
#
1 1 1 1 1 1 4 1 1
TRANSISTOR 15119144 15309104 15129179 15319107 SD000152 15329536 SD000187 SD000188 15329103T0 2SA1048-GR(TPE4) 2SA1586-GR(TE85R) 2SC2458-GR(TPE4) 2SC4116-GR(TE85R) 2SD2525 RN1442-A(TE85L) UN2111 UN2211 2SK880-GR(TE85R) TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR FET Q5 on M Q23,Q26,Q395-398 on M Q6 on M Q19,Q20,Q24,Q25,Q27,Q303,Q399,Q400 on M Q394 on M Q12-17 on M Q392,Q393 on M Q391 on M Q4,Q21,Q22 on M 1 6 1 8 1 6 2 1 3
ZENER DIODE ZENER DIODE SWITCHING DIODE SWITCHING DIODE LED RED DIODE DIODE DIODE DIODE BRIDGE DIODE ARRAY DIODE
# #
D411,D412 on M D12-15,D410 on M D406 on M D2,D10,D11,D201,D204,D394,D395,D403,D 407-409 on M LED1-6 on P D8,D9 on M D295 on M D211,DD401,D402,D405 on M BD1 on M BD2 on M DA1,DA2,DA4-8 on M
2 5 1 12 6 2 1 4 1 1 7
RESISTOR 00344278 15409113 03348589 SD000143 SD000155 SD000158 15399926 SD000145 SD000148 SD000149 SD000154 SD000156 SD000157 EXBV8V102JV EXBV8V103JV MCR18 EZH J 3R3 100 OHM 2W 6.8 OHM 2W 82 OHM 2W MCR50-101J 10K OHM 1/4W 1M OHM 1/2W 220 OHM 1/2W 560 OHM 1/4W 6.8K OHM 1/4W 82 OHM 1/2W RESISTOR ARRAY RESISTOR ARRAY MTL.FILM RESISTOR METAL OXIDE RESISTOR METAL OXIDE RESISTOR METAL OXIDE RESISTOR CHIP RESISTOR CHIP RESISTER CHIP RESISTER CHIP RESISTER CHIP RESISTER CHIP RESISTER CHIP RESISTER RA4,RA3 on M RA1,RA2 on M R425,R427 on M R420 on M R301,R303 on M R141 on M R33,R22 on M R139,R140 on M R438 on M R21,R32 on M R38,R69 on M R234,R235 on M R222,R146,R147 on M 2 2 2 1 2 1 2 2 1 2 2 2 3
MLT.LAY.CERAMIC CAPACITOR M.POLYEST. CAPACITOR M.POLYEST CAPACITOR M.POLYEST CAPACITOR M.POLYEST CAPACITOR LINE CAPACITOR (SEC) LINE CAPACITOR (PRI) ELECTROLYTIC CAPACITOR ELECTROLYTIC CAPACITOR ELECTROLYTIC CAPACITOR ELECTROLYTIC CAPACITOR ELECTROLYTIC CAPACITOR ELECTROLYTIC CAPACITOR ELECTROLYTIC CAPACITOR ELECTROLYTIC CAPACITOR CHEMICAL CAPACITOR CHEMICAL CAPACITOR
C399,C426,C427,C432 on M C45,C396 on M C211,C212 on M C213,C214,C217,C218 on M C411 on M C140,C152 on M C151 on M C153 on M C30,C33,C68,C112,C146,C149,C270,C404,C4 07,C412 on M C175,C180 on M C44,C65,C197 on M C142 on M C145,C156 on M C394 on M C139,C141 on M C29,C67,C107,C125,C418,C419,C173,C178 on M C31,C46-48,C54,C55,C62,C70,C7476,C110,C160,C161,C165,C195,C395,C430,C 431 on M
4 2 2 4 1 2 1 1 10 2 3 1 2 1 2 8 19
9
Oct.2004(Jul.2006) CAPACITOR 01564045 02458989 13649711 02563623 02563623 03128790 ECA1JHG471E ECA1VM471B ECEA1EKS4R7B EEUEB1H470S EEUEB1H470S R2S-50V3R3MAX CHEMICAL CAPACITOR CHEMICAL CAPACITOR CHEMICAL CAPACITOR CHEMICAL CAPACITOR CHEMICAL CAPACITOR CHEMICAL CAPACITOR C413 on M C302,C303 on M C83 on M C164,C166,C206,C210 on M C414,C415 on M C410 on M
MRT 100MA/250V FC-201 5ST T4AL 250V RADIAL TYPE MRT T4.0AL / 250V RADIAL TYPE MRT T400MAL / 250V RADIAL TYPE MRT T80MAL / 250V
RADIAL TYPE FUSE HOLDER FUSE FUSE FUSE FUSE
FUSE6 on M for FUSE1 on M FUSE1 on M FUSE2,FUSE3 on M FUSE4,FUSE5 on M FUSE7 on M
1 2 1 2 2 2
CONNECTOR 13369570 03014001 13369981 03014023 B2B-PH-K-S (2P) B5B-PH-K-S JST(PB FREE) B5P-VH 7A/250V B9B-PH-K-S JST(PB FREE) CONNECTOR CONNECTOR CONNECTOR CONNECTOR CN5 on M CN6 on M CN13 on M CN9 on M 1 1 1 1
WP19 to WP20 on M CN9 on P WP17 to WP18 on M CN14 to CN15 on M CN7 on P WP13 to WP14 on P CN4 on M WP10,WP11 on M WP7,WP21 on M WP1,WP2 on M SP1 on M SP2 on M
TERMINAL LED HOLDER SW HOLDER SW KNOB HIMERON HIMERON CABLE CLAMP AC CORD HOLDER HIMERON AC CORD BAND (BLACK) HEATSINK RUBBER SPONGE BUSH
PT1870502 LH-5-7 AT-218K 87-YP5-228-01M W/ADH 6 X 50 X 0.5T 412-PGYL-3 1702B W/ADH 10 X 115 X 0.25T
TER1,TER2 on M for LEDs on P for ROTARY SW for LOGO BADGE for SPEAKER WIRING for TRIM SASH
12X20H CUT
for SPEAKER WIRING
2 5 1 1 3 1 2 2 1 1 1
ACCESSORIES (Standard) # SD000520 # SD000521
OWNER'S MANUAL OWNER'S MANUAL
JAPANESE ENGLISH
1 1
11
Oct.2004(Jul.2006)
CB-100
CHECKING THE VERSION NUMBER tools Required · · · 1. One pair of headphones Two BOSS FS-5U foot switches (sold separately) Two foot switch connector cables (phone-phone) Set up the CUBE-100 BASS as described below.
TEST MODE tools Required · · · One pair of headphones Two BOSS FS-5U foot switches (sold separately) Two foot switch connector cables (phone-phone)
Entering Test Mode 1. Set up the CUBE-100 BASS as described below.
[Connections] Connect an FS-5U foot switch to each of the two FOOT SW jacks (EFX, DELAY/REVERB). Set the FS-5U polarity switches to the jack side. Do not connect anything to any of the other jacks.
[Connections] Connect an FS-5U foot switch to each of the two FOOT SW jacks (EFX, DELAY/REVERB). Set the FS-5U polarity switches to the jack side. Do not connect anything to any of the other jacks.
[Panel Settings] POWER SW: PAD SW: SHAPE SW: All VRs: OFF OFF OFF Minimum
[Panel Settings] POWER SW: PAD SW: SHAPE SW: All VRs: OFF OFF OFF Minimum
COSM AMPLIFIER TYPE SW: SUPER FLAT
COSM AMPLIFIER TYPE SW: SUPER FLAT
The version number will not be displayed unless the connections and panel settings are correct. 2. 3. Press down on the foot switch FS-5U connected to the DELAY/REVERB jack while turning on the power. While continuing to press the FS-5U connected to the DELAY/REVERB jack, press the FS-5U connected to the EFX jack twice, within four seconds. After all the LEDs turn on, they begin to flash. Press the FS-5U connected to the DELAY/REVERB jack again.
The CUBE-100 BASS will not enter Test mode unless the connections and panel settings are correct. 2. 3. Press down on the foot switch FS-5U connected to the DELAY/REVERB jack while turning on the power. While continuing to press the FS-5U connected to the DELAY/REVERB jack, press the FS-5U connected to the EFX jack twice, within four seconds. After all the LEDs turn on, they begin to flash.
4.
This switches the CUBE-100 BASS to version display status. Check the version according to which of the POWER LED, the COMPRESSION LED, and the SHAPE LED are lit or off. fig.CB-100_version.eps
Exiting Test Mode Turn off the power to exit the Test mode.
POWER LED
Skipping Tests cannot be skipped in Test mode.
Test Items 1. Version Display/CPU and DSP Test (determined automatically) Press the FS-5U connected to the DELAY/REVERB jack.
SHAPE LED COMPRESSION LED LED POWER COMPRESSION SHAPE o: Lit x: Off 1.00 o x x 1.01 x o x 1.02 o o x 1.03 x x o 1.04 o x o 1.05 x o o 1.06 o o o
The version is indicated by on/off status of the POWER LED, the COMPRESSION LED, and the SHAPE LED.
If the EFX LED or DELAY/REVERB LED are lit at this time, the CPU or DSP self-diagnosis is failure (NG). The version is still indicated even when this occurs. 5. Turn off the power.
12
Oct.2004(Jul.2006) fig.CB-100_test.eps
CB-100 Press the BRIGHT switch. If the test results in OK (pass), the POWER LED lights. 2. 3. PAD Switch Test
POWER LED
DELAY/REVERB LED EFX LED
Press the SHAPE switch. If the test results in OK (pass), the PEAK LED lights. RECORDING OUT/PHONES Jack Switch Test
Plug the headphones into the RECORDING OUT/PHONES jack. If the test results in OK, the COMPRESSION LED lights. 4. DELAY/REVERB Jack Switch Test
Unplug the cable connected to the FS-5U from the DELAY/REVERB jack.If the test results in OK, the SHAPE LED lights. 5. EFX Jack Switch Test
SHAPE LED COMPRESSION LED LED POWER COMPRESSION SHAPE o: Lit x: Off EFX LED lit: CPU NG (failure) DELAY/REVERB LED lit: DSP NG (failure) If there is a failure in any of these tests, the procedure does not advance to the next test. 1.00 o x x 1.01 x o x 1.02 o o x 1.03 x x o 1.04 o x o 1.05 x o o 1.06 o o o
Unplug the cable connected to the FS-5U from the EFX jack. If the test results in OK, the EFX LED lights. 6. EXT SPEAKER Jack Switch Test
Plug the cable which isn't connected to anything into EXT SPEAKER jack. If the test results in OK, the DELAY/REVERB LED lights. After this, the COMPRESSION and SHAPE LEDs flash for one seconds, then the COMPRESSION LED remains lit. 7. AMP TYPE Switch Test
Slowly adjust the switch in the following sequence, and confirm the lighting status of the COMPRESSION and SHAPE LEDs.
2. Volume Test
When a volume knob is adjusted, the DSP automatically starts to generate tone, so if speaker is connected, the sound is output from the speaker. The volume changes according to the knob position until reading is completed. * We recommend connecting headphones to the headphone jack to prevent sounds from being output from the CUBE-100 BASS's speaker.
TYPE SUPER FLAT FLIP TOP B MAN T.E BASS360 SESSION CONCERT810 OCTAVE BASS o: Lit x: Off
COMPRESSION o x o x o x o x
SHAPE x o x o x o x o
This completes testing. Turn the power off.
Press the FS-5U connected to the DELAY/REVERB jack. All LEDs go out. Confirm the results of the volume test as described below. The reading of each volume is detected at four positions (in four ranges). Check confirmation of the detected volume with the COMPRESSION and SHAPE LEDs.
Knob Position (1) "0" or "OFF" or Min. (2) Left Half (3) Right Half (4) "10" or Max. o: Lit x: Off
SELECT (Green) x o o x
SELECT (Red) x x o x
Rotate the volume knob slowly from the (1) to (4) positions. Confirm that the SELECT (red) LED lights when the knob is at center position. Reading of the volume is completed with the detection of (4). The test proceeds in the following sequence. COMPRESSION -> BASS -> LOW-MID -> HIGH-MID -> TREBLE -> EFX -> DELAY/REVERB -> VOLUME -> GAIN If a mistake is made in the testing sequence, the operation at that point is disregarded, and only the volume adjustment knob targeted in the test is detected. If any volume level (1)-(4) for any knob is not detected, the procedure does not advance to the next test. The tone stops after testing of the last volume knob.
3. Switch Test
If there is a failure in any of these tests, the procedure does not advance to the next test. 1. PAD Switch Test
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Oct.2004(Jul.2006)
CB-100
BLOCK DIAGRAM fig.CB-100_block.eps
IC10B TUNER OUT JK4 DI OUT SELECT LINE OUT
IC17A
PHO BOARD RECORDING/ PHONES OUT JK2 AMP BOARD
IC11A
JK3 BALANCED OUT
IC17B
W3
SSW2 GND LIFT
IC14B IC11B
SW_PHONES IC203 TA2022 POWER_MUTE W12,13 BTL
SSW1 IC10A INPUT JK1 IN BOARD W1 AD/DA PAD ON: -10dB PAD GAIN CONTROL IC13A IC12B TUBE LOGIC IC12A