Ricoh nc8115.015 Technical Bulletin nc8015

			Technical Bulletin				No. RTB-001
	SUBJECT: Additional information to TD check							DATE: 15 July, ’92
								PAGE: 1 of 5
	PREPARED BY: I. Kakegawa					FROM: Copier Technical Support Section
	CHECKED BY:
	CLASSIFICATION:						MODEL:
		Action Required			Revision of service manual		PDC-1E
		Troubleshooting			Information only
		Retrofit Information			Other

This is additional information to TD check. (Refer to page 5-5 to 5-10)

1.Step 3, data input in SPD106 (Page 5-5)

Whenever TD check is performed, always input the proper humidity data.

If it is not changed although the humidity has changed, the pointer will not able to shift as required due to the pointer limit data. (Refer to page 2-7, #8)

2.In step 11, you must make a A3/11" x 17" copy using the C4 chart. This is to confirm that all four colors are developed properly.

[Example] If the charge corona unit for cyan has not been set in position, a cyan solid image without any white copy margin will be made over the other colors. In this condition if the following steps are continued, cyan process data will be abnormal.

3.Step 12, TD and TGRD Data Sheet (Page 5-7)

When filling in TGRD column based upon TGRD target data (SPD515 ~ 518), be sure to write the correct range as shown in page 5-7 of the service manual.

If not, there is a possibility of making a mistake in plotting the data due to misunderstanding of the range. A typical mistake that we have seen is shown on the next page. Due to the TGRD column being filled in incorrectly, TD was judged as "0" (OK). (Correct TD is "--1".) As a result, cyan toner is controlled low, showing "low cyan image density."

Technical Bulletin	No. RTB-001
SUBJECT: Additional information to TD check		DATE: 15 July, ’92
		PAGE: 2 of 5
[CYAN]

CORRECT

Since 4th detected TGRD data is out of OK range, TD data is changed from 9 to 8. Then, a 5th time.

TD		TGRD		±α	1	2	3	4	5	6	7
+1	109		118	+30
OK	104		108	+20
OK		101	103	+15
OK		89	100	+12
OK		88
OK		83	87	-5
OK		78	82	-10
OK		73	77	-15
OK		68	72	-20
-1		48	67	-40
TD		(493)			9				8
TGRD		(523)			50	61	64	66	73

[CYAN]

WRONG

Due to the TGRD column being incorrectly filled in, TGRD data from 1st to 4th checks are plotted in the wrong locations, resulting in no TD change.

TD		TGRD		±α	1	2	3	4	5	6	7
+1	109		118	+30
OK	104		108	+20
OK		101	103	+15
OK		89	100	+12
OK		84	88
OK		79	83	-5
OK		74	78	-10
OK		69	73	-15
OK		49	68	-20
-1		Upto 48		-40
TD		(493)			9
TGRD		(523)			50	61	64	66

To prevent this mistake, this sheet has been changed as shown below.

This new sheet is attached to the last page of this RTB. Keep it in your service manual.

[Black]

TD

TGRD Range

± Range

1

2

3

4

5

6

7

8

9

10

+1

+26 ~ +35

OK

+21 ~ +25

OK

+16 ~ +20

OK

+11 ~ +15

SPD515

OK

+ 1 ~ +10

data

OK

±0

(TGRD

OK

-- 5 ~ -- 1

Target)

OK

--10 ~ -- 6

OK

--15 ~ --11

OK

--20 ~ --16

-1

--40 ~ --21

TD Data

(490)

TGRD Detected Data

(520)

Technical Bulletin	No. RTB-001
SUBJECT: Additional information to TD check		DATE: 15 July, ’92
		PAGE: 3 of 5

4.Step 21, image density for each color using color patch (SPD 82--H)

1)After getting TGRD detected data into "OK" area (SPD520 ~ 523), set SPD82 to "H" to print 15 mm color patches using 7th LD power.

2)Make a test copy and check the following two points:

. Image density of color patches in BK, M, Y, and C. (See the one on the left side which is 100% dots filling.)

. Toner scattering around those patches.

STANDARD: Compared with the standard color patch sample of the 7th LD power enclosed in the manual, image density of each color on copy should be equal to or higher than the standard sample, but there shouldn’t be any toner scattering around those patches.

3) If a patch is lighter than standard, or if it is too dark with toner scattering, the next

steps should be done only for the abnormal color(s) depending upon the difference of ±α.

±α= [Last TGRD detected data (SPD 520 ~ 523)--TGRD target data (SPD 515 ~ 518)]

- - -TGRD- target data	- - -(SPD515- ~ 518)]
TGRD detected data	[(SPD520 ~ 523)
Last

±α		Color patch is too dark. (ID is too high.)		Color patch is too light. (ID is too low.)
		1.	TD: +1 (Increase TD data by "1", using	1.	Raise TGRD target data
			SPD490 ~ 493.)		by +15 for BK and M or
					+20 for Y and C.
					(SPD515 ~ 518)
+16
		2.	Repeat steps #13 through #17two times,	2.	Repeat steps #13 through #17four times,
			and plot TGRD detected data on a new		and plot TGRD detected data on a new
			check sheet.		check sheet.
+15		1.	TD: +1 (SPD490 ~ 493.)	1.	TD: --1 (SPD490 ~ 493.)
		2.	Lower TGRD target data	2.	Raise TGRD target data
			by -15 for BK and M or		by +15 for BK and M
			-20 for Y and C.		+20 for Y and C.
			(SPD515 ~ 518)		(SPD515 ~ 518)
		3.	Repeat steps #13 through #17four times,	3.	Repeat steps #13 through #17four times,
			and plot TGRD detected data on a new		and plot TGRD detected data on a new
--10
			check sheet.		check sheet.
--11		1. Lower TGRD target data		1.	TD: --1 (SPD490 ~ 493.)
			by -15 for BK and M or
			-20 for Y and C.
			(SPD515 ~ 518)
		2.	Repeat Step #13 through #17four times,	2.	Repeat steps #13 through #17two times,
			and plot TGRD detected data on a new		and plot TGRD detected data on a check
			check sheet.		new sheet.

NOTE1: The TD setting can be between 0 and 30. If there are no more steps to shift, change the ND setting by same value. (SPD495 ~ 498)

NOTE2: When TGRD target data is changed, the free run/self-check must be done four times. (A new check sheet is required.)

Technical Bulletin	No. RTB-001
SUBJECT: Additional information to TD check		DATE: 15 July, ’92
		PAGE: 4 of 5

4) After repeating Step #13 through #17 two times (only when TD data is changed), or four times (when TGRD target data is changed.), check the color patches (7th LD power) again.

If it is too light or too dark, the next steps should be done only for the abnormal color(s) depending upon the difference of

[Last TGRD detected data (SPD520 ~ 523) -- TGRD new target data (SPD515 ~ 518)]

- - -TGRD- target data	- - -(SPD515- ~ 518)
TGRD detected data	(SPD520 ~ 523)
Last

				Color patch is too dark. (ID is too high.)		Color patch is too light. (ID is too low.)
				1.	TD: +1 (Increase TD data by "1", using	1.	Raise TGRD target data
					SPD490 ~ 493.)		by +10.
							(SPD515 ~ 518)
				2.	Repeat steps #13 through #17two times,	2.	Repeat steps #13 through #17four times,
	+16
					and plot TGRD detected data on a check		and plot TGRD detected data on a check
				sheet.			sheet.
	+15			1.	Lower TGRD target data by--10.
					(SPD515 ~ 518)

2.Repeat steps #13 through #17four times, and plot TGRD detected data on a check

--10			sheet.
--11			1.	Lower TGRD target data			1. TD: --1 (SPD490 ~ 493.)
				by -15 for BK and M,
				-20 for Y and C from the present data.
				(SPD515 ~ 518)
			2.	Repeat steps #13 through #17four times,			2. Repeat steps #13 through #17two times,
				and plot TGRD detected data on a new			and plot TGRD detected data on a check
				check sheet.			sheet.

		Technical Bulletin				No. RTB-002
	SUBJECT: Exposure lamp position						DATE: 15 July, ’92
							PAGE: 1 of 1
	PREPARED BY: I. Kakegawa				FROM: Copier Technical Support Section
	CHECKED BY:
	CLASSIFICATION:					MODEL:
		Action Required		Revision of service manual		PDC-1E
		Troubleshooting		Information only
		Retrofit Information		Other

This is additional troubleshooting information for the exposure lamp experienced in Europe.

1.Additional information to the service manual, page 5-28, # 2

2.Set both lamp-heater assemblies in the scanner so that:

∙open parts face the center, and

∙two pins on the rear lamp terminal are fully inserted into the rear

	New	lamp receptacle.
		(There should be no gap between the rear receptacle and the
		rear end of the lamp.)

2.Troubleshooting

If the two pins on the rear lamp terminal are not fully inserted, the rear lamp terminal connection may be poor. Then, the inner surface of the lamp tube turns black on the rear side due to abnormal heat generation, resulting in low illumination on this area. In this case, the following will be observed:

1)The exposure lamp is turned on and off during scanning, because the lamp is just going to be open circuit.

2)Color tone on the rear side of the copy image is not the same as at other areas because of the dark lamp area. Under this condition, replace the exposure lamps.

Technical Bulletin				No. RTB-003
SUBJECT: Key counter mode copy					DATE: 15 July, ’92
					PAGE: 1 of 1
PREPARED BY: I. Kakegawa			FROM: Copier Technical Support Section
CHECKED BY:
CLASSIFICATION:				MODEL:
Action Required		Revision of service manual		PDC-1E
Troubleshooting		Information only
Retrofit Information		Other

To enable copy operation with the key counter, do the following:

1. Install the key counter receptacle.

2. Turn off SW100 on the sequence control board (rear side) to select key counter mode.

3. Then, depending upon the customer’s request for key counter management, input the appropriate data (from 0 to 7) in SPD12. (See page 4-24)

This is to decide in which color modes the key counter is incremented.

	Data			Full Color	Single Color	Black
	0	0	0	x	x	x
	0	0	1	o	x	x	o: Count up
	0	0	2	x	o	x
	0	0	3	o	o	x	x: No count up
	0	0	4	x	x	o
	0	0	5	o	x	o
	0	0	6	x	o	o
	0 0		7	o	o	o
[Example]				SPD12-001: The key counter shows the number of full color copies made.

SPD12-007: The key counter shows the total number of copies made in all three color modes.

NOTE: When key counter mode is selected by turning off SW100 on the sequence control board, the key counter should be set for any copy operation regardless of SPD12 data.

[Manual correction on page 4-24, SPD12]
o: Key counter required			o: Count up
x: No key counter required			x: No count up
Default: 0 0 7			Default: 0 0	0

			Technical Bulletin		No. RTB-004
	SUBJECT: Forced self check operation with new ROMs					DATE: 15 July, ’92
						PAGE: 1 of 3
	PREPARED BY: I. Kakegawa			FROM: Copier Technical Support Section
	CHECKED BY:
	CLASSIFICATION:				MODEL:
		Action Required	Revision of service manual		PDC-1E
		Troubleshooting	Information only
		Retrofit Information	Other

1. SPD-22, Forced self check operation

In order to perform the self check operation at a certain copy interval, the following two ROMs has been changed to "C" version.

P/N A0925507B C (ROM on the sequence control board)

P/N A0925509B C (ROM on the process board)

This modification will be applied from July,’92 production onward. By replacing old ROMs with these two new ROMs as a set, SPD-22 can be accessed.

SPD-22: Forced self check operation at a certain copy interval

0:No self check operation (Default)

1:Yes, at every 200 copies

2:Yes, at every 400 copies

3:Yes, at every 600 copies

4:Yes, at every 800 copies

5:Yes, at every 1,000 copies

The default setting of SPD-22 is "0". If a data from 1 to 5 is selected, self check operation automatically starts just after the last copy of that copy job is fed out when the total copies made since the last self check becomes more than the set copy number.

The self check at around noon, set by SPD-21, is performed independently, regardless of the number of copies made since the last check.

Technical Bulletin	No. RTB-004
SUBJECT: Forced self check operation with new ROMs		DATE: 15 July, ’92
		PAGE: 2 of 3

By both morning and noon self checks, the copy counter for the next self check is reset to "0". However, it is not reset by just turning off and on the main switch.

[EXAMPLE] Conditions 1. SPD20-L: Noon self check on.

2.SPD21-120: 90 + 120 = 210 minutes, Noon check is done 3.5 hours after the main switch is turned on.

3.SPD22-2: Self check at every 400 copies.

4.In the morning, 210 copies are made.

5.In the afternoon, 560 copies are made.

Turn on/Self check	Self check	Self check	Turn off
9:00	12:30

1 job: 70 copies

Counter

Reset to 0	210 copies					450 (Finish)		110 copies
			381 400
	0		(Start)
			0

2. Purpose

Under the following conditions, there is a possibility of a toner concentration problem, especially for magenta color.

1)Since the last self check, 800 to 1000 copies or more have been made.

2)The number of copies from one original (C/O), is rather high.

3)Low humidity.

If these conditions are met, magenta toner concentration becomes high. Then, by VSG detection, greater pointer data and ND data will be selected, lowering toner concentration. Due to long copy runs without self check, toner control target (VTC) can not be revised by TGRD detected data (ND and CD data). Then, low image density for high tone areas may happen due to too low toner concentration. Due to high C/O, DIF detection is not performed for long copy runs, resulting in no pointer shift even if humidity condition have been changing. Because of this, toner concentration becomes too high or too low against the latest humidity condition.

To avoid the toner concentration problem, perform the following action.

Technical Bulletin	No. RTB-004
SUBJECT: Forced self check operation with new ROMs		DATE: 15 July, ’92
		PAGE: 3 of 3

3.Action Taken

1)For machines from the July,’92 production with "C" version ROMs on both the sequence control board (P/N A0925507C) and the process control board (P/N A0925509C)

Set data "2" (400 copies) or "3" (600 copies) of SPD-22.

Then, explain the self check operation at set copy intervals to customers, and ask them to wait for one or two minutes.

2) For machines upto the June,’92 with upto "B" version ROMs.

a) Manual self check

Set SPD30-H to perform a self check whenever the main switch is turned on. Ask the customer to turn off and on the main switch at every 400 to 600 copies or at any time the image density becomes too low or too high.

b) Automatic self check by new ROMs

If it is difficult for the customer to turn off and on the switch regularly, install the new ROMs as a set, and set SPD22 to 2 or 3.

NOTE: These two ROMs are 512 K.

			Technical Bulletin		No. RTB-005
	SUBJECT: Important parts to be cleared regularly					DATE: 15 July, ’92
						PAGE: 1 of 1
	PREPARED BY: I. Kakegawa			FROM: Copier Technical Support Section
	CHECKED BY:
	CLASSIFICATION:				MODEL:
		Action Required	Revision of service manual		PDC-1E
		Troubleshooting	Information only
		Retrofit Information	Other

As explained in the PM table in the service manual (page 4-1 ~ 4-3), there are parts to be cleaned at every EM. Among these parts, the most important parts are as follows;

1. Grid plate

If the grid plate becomes dirty, the copy image is not even, especially for low to middle solid areas on originals. Then, vertical dark stripes are copied on such a solid area.

This is caused by a dirty grid plate. To prevent this, clean the grid plates at every EM visit.

Put them in water, wash them, and dry them.

NOTE: Do not fold them while washing.

Be sure that there is no fiber dust remaining on them.

2. Optical fiber array

If you have the impression that the copy image is less sharp or less crisp than at installation, try to clean the optical fiber array with a soft cloth. (Black stains will be removed.)

Clean the array at every EM with a soft cloth, and then discharge it by wiping with your clean finger.

			Technical Bulletin		No. RTB-006
	SUBJECT: VLL/VLH pattern on the reverse side of copy					DATE: 15 July,’92
						PAGE: 1 of 1
	PREPARED BY: I. Kakegawa			FROM: Copier Technical Support Section
	CHECKED BY:
	CLASSIFICATION:				MODEL:
		Action Required	Revision of service manual		PDC-1E
		Troubleshooting	Information only
		Retrofit Information	Other

If VLL/VLH line pattern (10 mm x 10 mm, see page 2-17 of manual) is visible on the reverse side of copy paper, set SPD-11-H.

These line patterns used for DIF detection are developed just after the last copy of that copy job has been made. Then, they are checked by the ID sensor, and are transferred on the transport belt. Normally, the belt stops turning just before the patterns on the belt are cleaned. At the next copy job, they are cleaned.

However, if the machine is used less frequently due to low copy number, or is used under high temperature conditions, these pattern made at last copy job may not be cleaned completely. Then, they are put on the reverse side of the next copy paper.

SPD11 is to control belt cleaning time at the end of copy job.

If SPD11 data is changed to "H", the belt turns 2 seconds longer than usual to clean the pattern before the belt stops.

NOTE: For the machines with low copy volume used under high temperature conditions, set SP11 to "H". In this case, it takes 2 seconds longer for the machine to be back to "Ready" condition.

			Technical Bulletin		No. RTB-007
	SUBJECT: Parameter setting for AC Power Pack (Discharge)					DATE: July 15,1992
						PAGE: 1 of 1
	PREPARED BY: T. Okajima			FROM: Copier Technical Support Section
	CHECKED BY:
	CLASSIFICATION:				MODEL: PDC-1E
		Action Required	Revision of service manual
		Troubleshooting	Information only
		Retrofit Information	Other

1.Summary

The service manual describes that the data of SPD430 is "800" and SPD431 is "300" (SPD430: Transfer belt discharge voltage, SPD431: Separation corona voltage). However, these SPD’s were adjusted at the factory to other parameters for stabilizing the output voltage of the power packs. So, to fix the parameter of these SPD, the power packs have been modified.

AC Power Pack - Discharge : AZ310013 → AZ310013A → AZ310014

Two AC Discharge Power Packs are used in one machine. These parts are identical, one is used for the transfer belt discharge, and the other is used for the separation corona. When you replace the power pack with a new one, or when the parameter of SPD430 or SPD431 is erased for some reason and some problems occur, refer to the following section:

2.Details

1)Possible problem

If the following parameter is bigger than the specified one;

SPD430 (Transfer belt discharge) - no problem but waste of power,

SPD431 (Separation corona voltage) - void image, toner scattering on the copy, If the following parameter is lower than the specified one;

SPD430 - remained image, poor transfer of Bk image, SPD431 - poor paper separation,

2) Parameter setting

If the problem above occurs, check the parameters of SPD430 and SPD431 refering to the table.

According to our records, P/N AZ310013 and P/N AZ310013A do not exist as service parts. When you replace the power pack with a new one (P/N AZ310014), set the parameter for SPD430 at 780, and the parameter for SPD431 at 280 for any machine.

Note: If you have a P/N AZ310013(A), please inform us. We will send you the P/N AZ310014 instead.

Serial number		AC Power Pack -
A092 - 22	092 - 27	Discharge	SPD 430	SPD 431
First production	First production ~	P/N AZ310013	800	300
~
No production	A3012030001 ~	P/N AZ310013A	570	135
4302040001 ~	A3012030011 ~	P/N AZ310013A	570	050
4362040006 ~	A3012050001 ~	P/N AZ310014	780	280