64

F 2 2, 3 1, 6& i> 4 (P.34 40)o 1. EXIT NUMBER4 Ztfltto 2. > J 7'< *JU MIDI IN MIDI 0UTi- 'r-7' UT-o t MH.tc 4. h- - - JU& tk , NG C i IS LTT I Refer to 2 2. 3 1 and 6. and 4 2 in the Troubleshooting section (p.34 40) 1.Press NUMBER 4 while holding down EXIT , 2.Connect a single cable to both the MIDI IN and the MIDI OUT connectors on the rear panel. 3.Check that the OK message is displayed. 4. Disconnect the cable and check that the display changes from OK to NG. MIDI test o n n e c...

D

Unregulated power of + 5V is used for lighting the LEDs and unregulated power of + 15V is used for the mute circuit. The actual voltage of the unregulated +5V is about + 10V and that of unregulated +15V is about + 22V. LED t LT, Unreg. + 5V , tz i zl - h H gffl t LTUnreg.+ 15V ffl Unreg. + 5V URgCD .Eiife fci+ 10V, Unreg. + 15V ltts i + 22VTt< , The power is supplied to the system from CN1, CN2 and CN3 (on the PB). CN1 is connected to the Jack Board (abbreviated as JB) and CN2 and CN3 are...

Ic24

A 20MHz clock pulse is supplied to IC36. IC36 turns the pulse into a system clock signal by dividing. The system clock signal is divided and supplied also to IC5, IC11 and IC13 (on the MB). When the power is turned on. IC36 reads in the battery voltage for memory backup from the analog input port. It also reads in the battery voltage in the Card when a DATA Card is inserted. In both cases, an error message is displayed when the voltage reaches a point less than + 2.7V or more than + 3.5V. IC36...

Ics

t V Mb fcHITl & H g IC5i< IWf It s HT fi v TT I Is a pulse waveform coming from pin number 46 on ICS IC5 is out of order. Check for short circuits among the pins on ICS, short circuits in the peripheral patterns, and the cut-off of the patterns. Then check the following matters. Is a clock signal coming to pin number 3 on IC5 Check IC35, FL28. R52 (on the MB) and their peripheral patterns. Is a clock signal coming to pin number 2 on IC5 Check IC7 (on the MB) and its peripheral patterns....

Identifying Version Number

Press the MULTI button to set the JD-800 in Multimode. 1. MULTI U JD-800 v , i-- Kil 2.Press the EXIT button while simultaneously pressing both 2. CURSOR L t CURSOR R Itifri, EXIT the CURSOR L and CURSOR R buttons. f L (the same method used for entering Test Mode) (f-7. hi- 3.The version number is displayed on the screen 8t the ri9ht. 3. fiSiiliilw'' i 3 S Tv jT

Info

C) The action of the keyboard is exceptionally hard The plate springs of the keys are not installed correctly. Repair them by referring to How to remove the keys and How to replace the keys (p. 7). The stoppers of the keys are loose. Repair them by referring to How to remove the keys and How to replace the keys (p.7). 2.The buttons and switches are hard to operate Switches, sliders or volumes may be tilted or at an angle in the plate and are touching the holes. Check them by referring to the...

Oa

LED is incorrect. (Refer to 6 in the TEST MODE section. p.31.) Check the LEDs which are malfunctioning. Check all the patterns of scan lines which are connected to these LEDs on all the boards. Check CN3, CN4 (on the MB) and the wirings which are connected to them. Also check the wirings and connectors on all the boards installed to the panel. Check IC2. IC3 (on the MB) and their peripheral patterns. Check IC5 (on the MB), as in A. Button switch is out of order, above. 5.LEDi< fc LU (fXhi-K-...

Ok

When NG appears under R W Refer to 2 3 in the Troubleshooting section (p.34). When NG appears under Batt Refer to 1 3 in the Troubleshooting section (p.33). h 7 7 lis s.- - < > 1 (P. 1.Press BANK 2 while holding down EXIT , 2. Insert a memory card such as the M-256E into the DATA CARD slot on the rear panel. (Turn off the memory protect switch.) 3.The test has been successfully completed if OK is displayed in the right side of the screen. . EXIT WtWb BANK2 WL t. 2.WJ 7'**A DATA CARD OX a -j...

Palette Tone H

When it is inoperative NGO n Refer to 2 6 in the Troubleshooting section (p.35). l-77A-> a-f l > f(0 2) S-S- IKiLTTSl fP. 1.Press BANK 8 while holding down EXIT , 2.When the WG WAVEFORM knob is rotated, numbers are shown with the clicks. 3. The number increases when rotating the knob to the right, and decreases when rotated to the left. The number changes in the range of -50 00 v 50. 4. The number will change upon each click, according to the direction in which the knob is rotated. 2. WG...

Restoring The Factory Presets

The original factory settings will be restored to the entire memory space when performing the following operation. Make sure to transfer user data to a DATA card (M-256E) before executing this operation. (Refer to Data Save and Load page 9.) 2. After pressing the DATA TRANSFER button, press the PAGE A button six times to call up the Factory preset screen. - MTcomtt& ijot. t'J-lit- TimiSffci 2. DATA TRANSFER tzik. PAGEa 6iH)ffl Factory preset CDffiffi Bftftii LTTSU,

SpecificationsfiHI

Weighted- action 61 keys (with velocity and channel aftertouch) Maximum polyphony-- 24 voices Part 1 to 5,Special part Internal (INT) Internal waves 108 Single mode Distortion.Phaser.Spectrum, Enhancer Chorus, Delay. Reverb, Mix out filter Multi mode Reverb. Chorus + Reverb. Delay + Reverb. Mix out filter LCD 22 characters,2 lines (backlight) 16 characters.2 lines (backlight) LED 8 segments.2 characters (W) 1040* (D) 424 x (H) 118 mm (W) 40-15 16 x (D) 16-11 16 x (H) 4-10 16 15.0 kg MIDI...

To Ic11

IC26 (on the Mb), and IC1 (on the Card Board). This memory and the PCM data read from the WAVEFORM Card are processed by IC21 IC24 (on the MB), and are output as serial data. IC22 functions for the TVF. IC21 executes the effect processing. Serial data is converted from digital to analog by IC11 (on the JB). then is demultiplexed by IC13 (on the JB) before becoming voice waveforms. The signals for muting of the output are made from the reset signals. The circuit...

Tsu

Check that a clock signal of sufficient level is supplied to pin number 2 on IC21 (on the MB). Check the level of the reset signal which is input to pin number 94 on IC21. Also check the serial data on pins numbered 7 10 on IC21. Check IC14 IC19 (on the MB) and their peripherals. Also check the signals which are supplied from pins numbered 59. 54 and 66 on IC21 (on the MB). Check IC22 (on the MB) and its peripherals. There may be a decrease of gain in the analog output circuits. Check the...

How To Check For Short Circuits Among The Power Supply Patterns

First, disconnect all of CN1-3 (on the PSB). Make sure at this time that 5V is being conducted over pin three of IC2. Then, one by one, reconnect the connectors that you just unplugged to find which connector decreases the voltage of pin three on IC2 to a point as low as OV. If the voltage decreases when CN1 is reconnected, the power supply pattern on the jack board has a short circuit. If the voltage decreases when CN2 is reconnected, the power supply pattern on either the Main Board or Card...

Encoder

IC5 reads in port 8 at the trailing edge of IRQO, then judges the direction of the rotation. Twenty-four clicks per one rotation is used for the rotary encoder. u-9 'J- i> 3- r-ttHHH 3 24 'J fcOi Modulation and after touch is the pressure resistance, and the change of the resistance value by pressure are converted into 0 I- 5V voltage change, and then input info IC4. IC4 multiplexes the signal, then inputs it to IC5. Resistance values- voltage conversion circuit is shown in Fig. 12. t a b >...

Mm

JD-80011IC36 (on the Main Board, BSE MB) CPU f XfAtto IC21-IC24 (on MB) li igS , 1C5 (on MB) li ICH (on MB) t i-7x-X, 1C28 (on MB) (i t'J- - By IC2 (on the Power Supply Board, hereafter abbreviated as PB) a stable power supply of + 5V is provided for the digital power supply. By IC3 and IC4 (on the PB) a stable power supply of r15V is provided for the analog power supply. The rating of the + 5V power supply is 1A. and that of the 15V source is 500mA Reset signal are sent by IC1 (on the PB). IC1...

Ic5

> tli to r4.+'* > -j f-mi L R13, R14, R22> R23 Q3 (on MB) S-f x. y 9 LTT c) Bender is active even though the bender is set to the center position. Is the voltage of pin number 3 on CN5 (on the MB) at OV, when the bender is set to the center Check the bender unit. Also check the connection from the bender unit to the Jack Board. Check Q3, IC9 (on the MB) and their peripherals. When it is operating properly, setting the bender to the center causes the voltage on pin number 7 on IC9, pin...

9 Ltt3

Bfl CN10 (on MB) 4 b'> ff * Ss 'J FL5 (on MB) ifi y 9 LT F3 c FL5fcJWSW*iE Jg& ii. IC22 (on MB) IC22 3 flTl - > iz-> s - h - > Wtlt> < K ttz, IC22 62 b'> K, tl VK) < D9 D 9 LTT3 CN10 (on MB) 5 10 f> ii BSt *** NG iI ttFL6 FLlls R33 R36& tf C101 (on MB) fx y 9 LTT300 IC22 (on MB) btltt. IC22 < 1 3 ftT > 3- 9 LTT3('o S tz, IC22 62fr b'X Is< iV< > 9 a y 3 ICllf fcttIC12 (on JB) omttT& Wsto ICURVIG12 LTT3l o S Serial data of voice and pulse signals for...

7

ICS, IC7, IC11 IC13S C30, C35, C38& tfC43 (on JB) s fx- LTTi o ttz, -> 'i-y 9 K 7 + a - x y 9 LTT fc 0 bOZto 15V Si *fftjBSWtt *xy*LTTa tmtfatmtiit1)-ibim< ott0 t . CN10 (on MB) 4fftc> (C, y')7Jl b) Keys make a clicking or scraping sound when they are pressed. The plate springs of the keys are loose, or not enough lubrication has been applied to the plate spring. Repair them by referring to How to remove the keys and How to replace the keys (p.7).

9

7VJilT ig 4051 9 11 2r ZiE S Jl riy 9 JjZft The output of 8 sliders are input to one 4051. The 4051 multiplexes them and outputs them. When the power supply voltage greatly decreases, crosstalk is caused among the inputs of the 8 sliders of the 4051. and one input can effect other inputs. Also when there are some open inputs among the inputs of the 4051. these inputs will be affected by other inputs. tit. 4051 8 A2lMlY-9tfi 64 U o< DA j > M i< DAJjizSimm-A.Z z t fctt VZto d) Parameter...

Top View

Is the voice waveform output at pins numbered 1 and 12 on IC13 (on the JB) when a key is pressed Check IC11 IC13 (on the JB) and their peripherals. Especially check the signal waveform for demultiplex which is input to pins numbered 9 11 on IC13. Check the analog output circuits on the Jack Board by referring to the circuit diagrams. Also check VR1 (on the BB). Check the connection between bender board and the jack board, as well. Does the instrument sound when keys are pressed There is a...

Troubleshooting

When the unit is damaged or out of order for some reason, check the following items while referring to the circuit diagrams. Is the voltage supplied to the ICs correct There are cases in which the unit, though operating correctly, may seem damaged or out of order because of incorrect parameter settings or problems with peripheral equipment. PSB - Power Supply Board VLB - Volume_L Board VRB - volume_R Board Is AC voltage being conducted on the (first order side ) of the power transformer Check...

Adjustment

Use VR1 on the jack board for adjustment. See 15 D A Adjustment, in the TEST MODE section, page 32, for details. wmtit + vttf- K_t VRIc -itni'ifo IMlIli-r* hi- K r 15 D AB6J (P.32) ITT Use VRI on the main board for adjustment. The display becomes dark when turning the VR1 toward the right, and becomes light when turning it toward the left. sseny -f > *- K OVRI nio-tif

Data Save And Load

Save and Load by using the DATA card. . DATA t gt - KS-f ffl Ltt-7 D- Kfc Ttt p Tia C 1. Insert the DATA card into the DATA slot and turn off the memory protect function of the DATA card. 2.After pressing the DATA TRANSFER button, press PAGE AT to read out the INT - CRD screen. 1.DATA ij- K DATA Xa y h ISgiCMLii DATA fi Vn-fuT b amp oi lzLZto 2. DATA TRANSFER PAGEAT t, INT- CRD OWM mf- itito DATA TRANS INT CRD HLL Patch Setup CV.-N 3. Select the data to be saved by moving mark by using 3....

26

Cic Cable Roland

Place the contact rubber sheet on the contact board. Align contact projections with holes in the board. Press the hole in top face of the projection with a small rod like clip shown in Fig. 12 so that the projection is held in a hole of the chassis. Note that the left end of a rubber contact should be placed over the right end of the left side rubber sheet see H in Fig. 12 . i lt MfcoftT'tfe ri sorts-fl gt - gt L t to its Mt ir 'J gt yzmof izwiiitzM amp t tzL o cj b cb a oa aa ca an oa aa oa...

Battery Error Message

The installed batteries and the batteries for the DATA card are monitored as to whether they have sufficient voltage or not by the voltage which is conducted to pin number 52 installed batteries and pin number 53 card batteries on IC36 on the MB . Battery power is sufficient if the voltage is more than 2.7V and less than 3.5V error messages are shown when the voltage is not within that range. A - KO '-yf'J-li, ZtlZ'ft IC36 on MB 52iSf gt S 53 t iot, Ef ChZfri frfrTx y amp lT to mBifr 2.7VJ l...

Screw

A 3 x 6mm P.Tight Pan Head Fe.BC B 3 x 8mm B.Tight Binding Fe.Cm C 3 x 8mm P.Tight Pan Head Fe.BC 34 Card 35 Trans 37 A Transformer BE1-KJW 38 Power Supply Board 40 A Power Switch WK2A44 6A 250V 41 Primary 42 Keyboard SK-761-E 43 Bottom 44 Rubber Foot FF-018 7626608000 22205537 22465207 22455636U0 7626616000 13429718 - 13149108 7626616000 7626620000 22815778

1

Ykb21 5012

Card Escutcheon DATA card 22225365 Jack stereo YKB21 - 501 0 13449145 PA-126 13429710 100V.1 20V,230V CM - 11 13429718 240VA.240VE A Power Switch ' WK2A44 6A 250V 13149108 DIN Socket triple YKF51-5046 13429273 Copyright 1991 by ROLAND CORPORATION No. - PARTS NAME - - PARTS No. - 1 Volume_L 2 Volume_R 3 Encoder 4 Switch A 5 Bender 6 Switch B 7 LED 8 LCD Display LM40 x212 15029523 9 Display 10 Switch C 11 B Knob 12 B Knob 13 Bender Unit 45 Leaf 47 SW_A Preparing Lead 23485879 49 Panel

Roland Jd-800 Main Board

4 K CN15iK36 W ' - gt i 9 LTT3 lt - . ttz, R53 x-y 9 LTT l'o JMIWtt CN15 on MB CN6 on JB R0 g f x-y LTTSi o SMitlLT, CN6 on JB j amp w amp IClG on JB -yJkV-l amp s L7 on JB 9 lTT l- gt 0 ttz, Q8v Q1K R47, R48, R51 amp tfL12 L14 on JB tinhorn . -J 9 ltTSi gt . Rtf 5 i.r ffi i j a mm com it IC9 on JB 2St gt . IC9 on JB 6 f gt amp 1 gt 'CN1 5 on MB 3f5t MIDli lt A gt J tl L10, L1K R44, R45ScUrD5 on JB i- x y 9 LTT 3W When pulse appears only at pin number 2 of IC9 Check R46. IC9. IC10 L6, CN6 Con...

Main Board

Apparatus containing Lithium batteries Lithiumbatteri - Eksplosionsfare ved leilagtig h ndtering U skiftning m kun ske med balten al samme tabrikat og type. Lever del brugte batleri lilbage Iii leverandoren. Explosionsfara vid felaktigt batteribyte. Anvand samma batterityp eiler en ekvivalenl typ som rekommenderas av apparattillverkaren. Kassera anv nt batleri enligl tabrikantens Instruktion. Ved utskitting benyttes kun batteri som anbefalt Brukt batleri returneres apparatleverandoren Paristo...

Circuit Diagrams

Akai Power Amps Circuit Schematics

SW1TCH_A,B.C.CARD,LED and BENDER X f 27, 28 POWER SUPPLY,JUMPER,PROMARY yt - 77-i7'J 29 TEST MODE zrX h E K 30 32 TROUBLSHOOTING h lfJl vi-r-i 33 41 IC DATA IC 41 43 Side Panel L Front Panel A 21125496 22225439 B Knob CM 22485251 Rotary Encoder EVQWQ5F2024B 13289132 22045265 LCD Holder 22205539 LCD Display LM40 x 212 15029523 LED 8 seg. GL6S220 15029365 Keyboard Ass'y SK-761 -E 7626620000

Joboo [service Notes

PROGRAMMABLE SYNTHESIZER First Edition 1 2 6 IDENTYFING VERSION NUMBER - J 3 9 RESTORING THE FACTORY PRESETS HJ - 7r'Jiz gt y bOt 9 9 DATA SAVE AND LOAD Diz-J n - 9 CIRCUIT BOARD MAIN mfoM 4 y 17 CIRCUIT BOARDS VOLUME_L and ENCODER SiSH gt J a. - A L,x y 20 CIRCUIT DIAGRAM CIRCUIT DIAGRAM VOLUME_L f'Ja-AL 21 CIRCUIT BOARD VOLUME_R SI50 U a-A R 22 CIRCUIT DIAGRAM VOLUME_R mm a AR 23 CIRCUIT BOARD JACK S amp ST v 24 CIRCUIT DIAGRAM JACK IsJSSgl vf '- 25 SWITCH_A,B,C,CARD,LED and BENDER 5F-...