Marantz Service Manual error thread
- Thread starter Jailtime
- Start date
2252 on the Power Board.
Service Manual parts list has transistors Q 803 and 804. On the board these transistors are at Q 803 and Q 806. Looks like the diode listed in parts as Q806 is Q804 on the board, and the transistor listed as Q804 in parts is Q806 on the board.
Service Manual parts list has transistors Q 803 and 804. On the board these transistors are at Q 803 and Q 806. Looks like the diode listed in parts as Q806 is Q804 on the board, and the transistor listed as Q804 in parts is Q806 on the board.
MBuras
Restoration is an Addiction
Marantz 1030 Integrated Amplifier (early model SN 1333)
P900 Phono Board C909/C910 100uf-6.3v
Board polarity markings are reversed
P900 Phono Board C924/C925 10uf-25v
Board polarity markings are reversed
Everything else was good. I documented all resistors, transistors, diodes, e-caps. Only small difference in early models was the helper filter cap which later changed to a slightly larger single main filter.
Mike
P900 Phono Board C909/C910 100uf-6.3v
Board polarity markings are reversed
P900 Phono Board C924/C925 10uf-25v
Board polarity markings are reversed
Everything else was good. I documented all resistors, transistors, diodes, e-caps. Only small difference in early models was the helper filter cap which later changed to a slightly larger single main filter.
Mike
Dunno if this is in there...In the 2252B SM from hifi E. page 19 and 20 for P700 board...Q715/716 are listed as 2SD945. They aint, parts list has em as 2SC945 and you will yank a 2SC945, but the print is wrong.
Marantz 2500 SM error
All over the service manual, it has the bias trim pot labeled R716.
Its R761 on the boards. The one in the middle of the board.
All over the service manual, it has the bias trim pot labeled R716.
Its R761 on the boards. The one in the middle of the board.
rustyhusky
Member
2325 - Just got burned on this one while doing a rebuild of the P200 FM IF board. Parts list in service manual calls out C244 and C245 as 100uf, 10V electrolytics, which is incorrect. C244 and C245 are actually 10uf, 16V electrolytics as installed and also as shown on the schematic.
klamsoss
Be willing to fail and try again.
Marantz master catrafter helped me figure out there is an error in the 2330B schematics.
For the speaker switch, fm muting, miltipath, mpx noise filter board (PU01 in the manual) CU03 doesn't exist, thought it is silk screened on the board.
A cap of the same value (10uF 16V) is actually floated between JU14 and JU18
For the speaker switch, fm muting, miltipath, mpx noise filter board (PU01 in the manual) CU03 doesn't exist, thought it is silk screened on the board.
A cap of the same value (10uF 16V) is actually floated between JU14 and JU18
Attachments
P800 variation on the 1060
I'm currently working on two virgin Model 1060's: S/N 28420, datestamp 49.1.23 (January 23, 1974), and S/N 43259J4, datestamp 50.7.28 (July 28, 1975). Both units have the second variation of the P800 circuit board (YD2828005-0), which is the version that uses J808 as a 7.27vac tie point for the power indicator lamp circuit, as documented by @gch53 here: Marantz Service Manual error thread
What I've also found in both of my units is that resistors R803 and R804 deviate from the S/M parts list and schematic as follows:
- R803 listed as 33K 10%, but installed is 27K Ohm 5% (red-violet-orange-gold)
- R804 listed as 470 10%, but installed is 100 Ohm 5% (brown-black-brown-gold)
Since I do not have an example of the first version of the PCB (YD2828004) to compare with, I can only surmise that this was part of the design revision rather than a S/M error per se.
(Also: Just found that further evidence of this for R804 was documented once before, by @Yankee Dog here: Under the Hood of a 1060 ) https://audiokarma.org/forums/index.php?threads/under-the-hood-of-a-1060.238272/
Just hoping to contribute in a small way to this invaluable thread, since I've learned so much here!
Cheers,
Steve
I'm currently working on two virgin Model 1060's: S/N 28420, datestamp 49.1.23 (January 23, 1974), and S/N 43259J4, datestamp 50.7.28 (July 28, 1975). Both units have the second variation of the P800 circuit board (YD2828005-0), which is the version that uses J808 as a 7.27vac tie point for the power indicator lamp circuit, as documented by @gch53 here: Marantz Service Manual error thread
What I've also found in both of my units is that resistors R803 and R804 deviate from the S/M parts list and schematic as follows:
- R803 listed as 33K 10%, but installed is 27K Ohm 5% (red-violet-orange-gold)
- R804 listed as 470 10%, but installed is 100 Ohm 5% (brown-black-brown-gold)
Since I do not have an example of the first version of the PCB (YD2828004) to compare with, I can only surmise that this was part of the design revision rather than a S/M error per se.
(Also: Just found that further evidence of this for R804 was documented once before, by @Yankee Dog here: Under the Hood of a 1060 ) https://audiokarma.org/forums/index.php?threads/under-the-hood-of-a-1060.238272/
Just hoping to contribute in a small way to this invaluable thread, since I've learned so much here!
Cheers,
Steve
Sergimm
Active Member
I believe I found another error while restoring a 1050 (valid also for 1072, as they share SM). In the schematic there is a diode with the same name as a transistor: Q710. See the attached image of the schematic.
I am not good enough at electronics to find out which one is the actual reference of the wrongly named diode, so I attach the PCB diagram with the real Q710 transistor and the Q706 transistor (which is next to the diode in the schematic) marked so that somebody more skilled at this than me can spot what should that diode actually be called.
I'm a complete newbie, so it could also be that I am wrong in all this!
Cheers!
I am not good enough at electronics to find out which one is the actual reference of the wrongly named diode, so I attach the PCB diagram with the real Q710 transistor and the Q706 transistor (which is next to the diode in the schematic) marked so that somebody more skilled at this than me can spot what should that diode actually be called.
I'm a complete newbie, so it could also be that I am wrong in all this!
Cheers!
Attachments
Last edited:
That applies to the 2226 as well.
2330B P800 errors: Parts list cap values diverge from schematic for C817, C818. Please confirm polarity for C817 and cap value, please confirm cap value for C818
Stereodiver
Well-Known Member
I hope I'm not duplicating anything that's already been said.
2252 (non b)
P700 main amp board. R735, 736, 737, 738, 270ohm, not 330ohm. R739, 740, 741, 742, 743, 744, 220ohm, not 270ohm. R747, 748, 2.4k, not 5.1k. R749, 750, 2.7k, not 5.6k. R751, 752, 24k, not 22k. R776, 470, 1w, not 330ohm.
P800 power supply board. C803, 470uf @ 63v, not 50v. C809, 1000uf @ 16v, not 10v.
PE01 tone board. RE35, 36, 200k, not 330k. CE21, 22, 3.3uf @ 50v, not 33uf @ 50v
This is how I learned that resistor color codes are your FRIEND!
Mark
2252 (non b)
P700 main amp board. R735, 736, 737, 738, 270ohm, not 330ohm. R739, 740, 741, 742, 743, 744, 220ohm, not 270ohm. R747, 748, 2.4k, not 5.1k. R749, 750, 2.7k, not 5.6k. R751, 752, 24k, not 22k. R776, 470, 1w, not 330ohm.
P800 power supply board. C803, 470uf @ 63v, not 50v. C809, 1000uf @ 16v, not 10v.
PE01 tone board. RE35, 36, 200k, not 330k. CE21, 22, 3.3uf @ 50v, not 33uf @ 50v
This is how I learned that resistor color codes are your FRIEND!
Mark
catrafter
Marantz Specialist
The polarity of C702 should be irrelevant in a properly operating amp.
The voltage at that point represents the amount of offset correction required (which ideally should be very close to zero, within a few mV, plus or minus) to balance the output at zero volts. Electrolytic capacitors are polarized, but will happily operate reverse polarized at very small voltage levels, IMHO.
Tom
As you had found out, my 2265B's P700 board was installed same valued resisters.
Do you have any idea whether it's OK when the resisters are installed as the service manual's value?
2226 Tuner Board
SM says R210 is 27K ohms, my board has 10K ohm resistor that looks original.
SM says R210 is 27K ohms, my board has 10K ohm resistor that looks original.
Really? There were many modification on the manufacture. Why I had not enough time to test, I installed the resisters as not SM but manufacted values.