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Service Manual - Page 1
... SERVICE MANUAL
PK 001800
KB-180
SKB-180
CONTENTS SPECIFICATIONS 3 PANEL LAYOUT 4 CIRCUIT BOARD LAYOUT & WIRING 6 DISASSEMBLY PROCEDURE 8 LSI PIN DESCRIPTION 14 IC BLOCK DIAGRAM 16 CIRCUIT BOARDS 17 TEST PROGRAM 26 INITIALIZATION 29 MIDI IMPLEMENTATION CHART 30 MIDI DATA FORMAT 31 PARTS LIST BLOCK DIAGRAM OVERALL CIRCUIT DIAGRAM
HAMAMATSU, JAPAN
Copyright (c) Yamaha Corporation...
Service Manual - Page 2
...we advise all Yamaha product owners that basic service procedures inherent to the industry, and more specifically Yamaha Products, are marked originally installed. IMPORTANT :
...Yamaha are subject to change without notice or obligation to retrofit.
Be sure to save any discrepancy appear to exist, please contact the distributor's Service Division. KB-180/SKB-180
IMPORTANT NOTICE
This manual...
Service Manual - Page 7
... connected to + mark.
Caution: Be sure to attach the removed filament tape just as spare parts. *1: Installation *2: Manual soldering *3: Dip soldering *4: Edge mark is adjusted to Pin 1 mark ( ˚ mark). *5: Red wire is adjusted to (+) terminal. KB-180/SKB-180
No.
are not available as it was before removal.
7
Connector assembly
Destination
Remarks
q
30 WC601200...
Service Manual - Page 9
... marked [210A]. (Fig. 6) 3-3 Remove the lower case assembly. (See procedure 1.) 3-4 Remove the seven (7) screws marked [210B],
three (3) screws marked [210C] and two (2) screws marked [210D]. KB-180/SKB-180
3.
Service Manual - Page 10
.... (See procedure 1.) 6-2 Remove the four (4) screws marked [210G]. ward. (Fig. 8)
*
When installing the DMLCD circuit board, tight-
PNL Circuit Board
(Time required: About 6 minutes) 7-1 Remove the lower case...shown in Fig. 9. (Fig. 9)
If the DMLCD circuit board is replaced, execute
the "Factory Set" in - KB-180/SKB-180
5. The PNL circuit board can then be removed from
the LCD unit...
Service Manual - Page 11
...Time required: About 3 minutes)
9-1 Remove the lower case assembly. (See procedure 1.)
9-2 Set the eight (8) hooks [A] parallel to the groove in
the upper case assembly and remove the... (Fig. 10) 10-3 Pull out the wheel assembly from the PB circuit board. (Fig. 11)
11. KB-180/SKB-180
8. PNR Circuit Board
(Time required: About 6 minutes) 8-1 Remove the lower case assembly. (See procedure 1.) ...
Service Manual - Page 12
...and black keys for circuit board "61L" in the figure for one octave unit are five sets in a set. (Fig. 12) To remove a set can then be removed. (Fig. 13)
*
When installing the circuit board 61L, tighten
the screws 1 through 12 in numerical order as
shown in... 12 and Procedure 12-2.)
12-5-2 Remove the three (3) screws marked [180B] and
five (5) screws marked [190B]. KB-180/SKB-180
12.
Service Manual - Page 16
...
OUTPUT PIN TO GND SHORT PROTECTOR
POWER
9 -OUT2
LOAD SHORT PROTECTOR
POWER
POWER GND2
10
PWR-GND2
8 +OUT2
OUTPUT PIN TO VCC SHORT PROTECTOR
16 KB-180/SKB-180
AK4385ET (X6040A00) DAC (Digital to 8 Demultiplexer
DMLCD: IC401, 402
BA4510F-E2 (X7300A00) Dual Operational Amplifier
DMLCD: IC502
1A 1 1B 2 1Y 3 2A 4 2B 5 2Y 6 GND...
Service Manual - Page 26
... of the number buttons to the CPU bus.
KB-180/SKB-180
TEST PROGRAM
* If the test number 47 "Factory Set" is executed, the data already set will be lost.
1 Preparations
1) Use an AC...level meter (with JIS-C filter) to the L/R of the [PHONES/OUTPUT] jack.
(33 Ω load)
Set the [MASTER VOLUME] to the maximum level and check the output level.
· PHONES L: -55.0 dBu or less...
Service Manual - Page 27
...the LCD. Checks the RAM connected to the L/R of the [PHONES/OUTPUT] jack. (33 Ω load) Set the [MASTER VOLUME] to the CPU bus. This will leave the test program and change to the play mode... Chk2 042
45 FRomChk2 045
47 Factory 047
48 TestExit 048
Test descriptions, judging conditions, etc. KB-180/SKB-180
TEST No
LCD display
20 SW Chk 020
21 A. Make sure that "PB OK" is displayed...
Service Manual - Page 30
... Mode 3 : OMNI OFF, POLY
o o
o(120,126,127) o(121) o(122) o(123-125) o x
Mode 2 : OMNI ON ,MONO Mode 4 : OMNI OFF,MONO
30
o : Yes x : No
x
x
Common : Song Sel. KB-180/SKB-180
MIDI IMPLEMENTATION CHART
YAMAHA [ Digital Keyboard ] Model KB-180/SKB-180
Date:21-SEP-2007 MIDI Implementation Chart Version:1.0
Function...
Service Manual - Page 33
KB-180/SKB-180
OVERALL ASSEMBLY
Upper case assembly 10
U20
U40
U40
Music rest
150
180
U40
270
210
360
U40
350
210
U40
U10
U40 290
280a
250
280b
250
210
70 280 ...300
Wheel assembly
80 90
210 210
320
340e
340c
270 210
270
100 60
L110 L10
L40
210
L20
180
110
250
L80
L70
L90
210
190
L100
210
270 270
260 LCD Unit
370 270
L30 370 90
370 120
150 ...
Service Manual - Page 34
...
໊
REMARKS
QTY RANK
૯
ཱ KB-180/SKB-180
૯
ཱ KB-180
(WN08930)
૯
ཱ SKB-180
(WN08940)
KB-180
SKB-180
ACMP,SYNCRO STOP,SYNCRO
03
START,INTRO/ENDING,START/
STOP,MAIN A,MAIN B
8BEAT,...,DG WUSHI
2 03
RUMBA,...,METRO.
PART NO. LCD Unit
270 VA126100 Adhesive Tape
270
--
LCD Unit...
Service Manual - Page 35
PART NO. WG073800 WF324900
DESCRIPTION ACCESSORIES Music Rest AC Adaptor
PA-5D CHN
෦
໊
ଐ
ේ
໘
൘
REMARKS
QTY RANK
08
*: New Parts 4
RANK: Japan only KB-180/SKB-180
REF NO.
Service Manual - Page 36
...50
180 50
190 180
60
175
155
152
KB-180/SKB-180
200
10 20
200 40
10
200 20
170
30
REF NO.
10 10 20 20 30 40 50 60 151 152 155 160 170 175 180 190 200
PART ... Circuit Board Circuit Board Felt U White Felt L White Rubber Support Connector Assembly Bind Head Tapping Screw-B Bind Head Tapping Screw-P Bind Head Tapping Screw-P
*: New Parts
16N C61 16N CEGB 16N CEGB 16L DFA 16L DFA 16N ...
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