ST60+ wind fault

[djs]

Hi
I’ve looked back at many of the discussions about the ST60 plus masthead transducers including the great research done by Nigel Mercer all those years ago. He’s a contributor sorely missed.

I have been getting direction info at the instrument all fine and dandy. But no wind speed. Wind speed data is transmitted on the yellow data wire and according to raymarine should show between 0 & 5 volts.
I checked mine and I’m getting full supply voltage of 8v.
raymarine tech support suggest that this means it’s a fault in the cable but I have connected the masthead unit directly to the instrument and the same happens so it’s not mast cable or connections inside he boat. I have removed the cable in the MHU and checked the five wires for continuity (fine) and any shorts (also fine).

I think that only leaves me with the PCB as a possible culprit. But before I commit to replacement plus the hassle of shipping out to the pacific I wondered whether I’m missing anything. I have asked locally about getting the PCB checked but haven’t been able to find anyone to do this and it’s well beyond my understanding.

am I missing something?
Any recommendations for source of replacement PCB

thanks all
Dave

 

[dslittle]

Hi
I’ve looked back at many of the discussions about the ST60 plus masthead transducers including the great research done by Nigel Mercer all those years ago. He’s a contributor sorely missed.

I have been getting direction info at the instrument all fine and dandy. But no wind speed. Wind speed data is transmitted on the yellow data wire and according to raymarine should show between 0 & 5 volts.
I checked mine and I’m getting full supply voltage of 8v.
raymarine tech support suggest that this means it’s a fault in the cable but I have connected the masthead unit directly to the instrument and the same happens so it’s not mast cable or connections inside he boat. I have removed the cable in the MHU and checked the five wires for continuity (fine) and any shorts (also fine).

I think that only leaves me with the PCB as a possible culprit. But before I commit to replacement plus the hassle of shipping out to the pacific I wondered whether I’m missing anything. I have asked locally about getting the PCB checked but haven’t been able to find anyone to do this and it’s well beyond my understanding.

am I missing something?
Any recommendations for source of replacement PCB

thanks all
Dave

Are you certain that the fault is electrical? I had the same symptoms which I resolved by going up the mast, removing the wind speed sender to deck, cleaning and spraying the ‘cups’ (which were stiff) and then replacing.

Sorry if it’s a bit basic and considered already but are your ‘cups’ turning???

 

[Lightwave395]

Hi
I’ve looked back at many of the discussions about the ST60 plus masthead transducers including the great research done by Nigel Mercer all those years ago. He’s a contributor sorely missed.

I have been getting direction info at the instrument all fine and dandy. But no wind speed. Wind speed data is transmitted on the yellow data wire and according to raymarine should show between 0 & 5 volts.
I checked mine and I’m getting full supply voltage of 8v.
raymarine tech support suggest that this means it’s a fault in the cable but I have connected the masthead unit directly to the instrument and the same happens so it’s not mast cable or connections inside he boat. I have removed the cable in the MHU and checked the five wires for continuity (fine) and any shorts (also fine).

I think that only leaves me with the PCB as a possible culprit. But before I commit to replacement plus the hassle of shipping out to the pacific I wondered whether I’m missing anything. I have asked locally about getting the PCB checked but haven’t been able to find anyone to do this and it’s well beyond my understanding.

am I missing something?
Any recommendations for source of replacement PCB

thanks all
Dave

I have a similar problem, I have to fix the cups too as they recently stopped spinning but prior to that I lost wind speed and on testing I found 8V on the yellow, however when I disconnected it from the display I had 8V on the display pin (where I sssumed I should have nothing) and the cable yellow seemed OK floating around 2V to 4V.
I have a replacement MHU but can't fit it yet until the boat is relaunched next March, I may need a new display in which case I wonder whether to get an i60

 

[djs]

Yes. The cups are spinning well.
I think I’m going to have to buy a replacement - even if it’s a second hand one. Hudson marine who would be my first choice for spares don’t have stock and don’t know when they may get any. Part of the chip / electronics world shortage I guess.

or I could just learn to do without but I am fond of my wind info ?

 

[ithet]

Self test procedure from the service manuals :

Self-test procedure
The ST60 CH Wind instrument has built-in self-test functions to aid fault diagnosis.
To access self-test mode, press Key 1 and Key 4 together for 4 seconds. When the
unit beeps, immediately press Key 3 and Key 4 together momentarily. The unit will
enter self-test stage 1.
Self-test stage 1
A. The unit should display S t followed by T1.
B. There will be a SeaTalk transmission to check the transmit/receive circuits.
C. The EEPROM is tested.
The following failure codes may be generated:
Message Failure Mode Action
F01 SeaTalk Rx/Tx Check for damaged bucket connectors/rear-case pins.
Check SeaTalk interface components around TR3 and TR5.
F02 EEPROM failure Replace EEPROM (IC8)
If there is no audible beep, generated by the key presses, check around TR2 and TR6
and the buzzer for damage. If the beep is quiet, check R79.
If all tests pass, P is shown on the display. Press Key 1 and Key 2 together
momentarily to progress to self-test stage 2.
Part 2. ST60 Instruments – Chapter 2. CH Wind
A22006
12 ST60 Instruments Service Manual 83142-1
Self-test stage 2
A. The unit should display T2 for 1 second.
B. Illumination will change between level 0 and level 3 every second.
C. Any key press will cause audible beep.
D. The pointer will rotate continuously. This will highlight a problem if the pointer
makes contact the dial or window.
E. LCD segments will cycle through the following sequence:
1 2 3
D4491-1
No fail codes are generated since stage 2 is an audio/visual check. The following can,
however, be used as a guide to isolate a problem:
Failure Mode Action
Keypad Illumination failure Check TR9, TR11, R78 and R91a.
(Dial illumination will also be degraded). Check LEDs 1, 4, 7 and 8 for open circuit.
Keypad illumination OK Check TR10, TR11, R75 and R91b.
but degraded Dial illumination. Check LEDs 13 - 16 for open circuit.
No beep when key pressed. Replace keyswitch.
LCD segment(s) missing completely. Check LCD solder pins for poor/dry joints.
Check IC3 for unsoldered pins.
Faint LCD segments. Check LCD pins for shorts.
Check IC3 for shorts.
Pointer not rotating or erratic movement. Check motor winding continuity.
Approximately 150 ohms between TP135 and TP136 and
between TP142 and TP143.
When the pointer has completed at least one rotation, press Key 1 and Key 2 together
momentarily to progress to self-test stage 3.
Part 2. ST60 Instruments – Chapter 2. CH Wind
A22006
ST60 Instruments Service Manual 83142-1 13
Self-test stage 3
This stage is to set up pointer offset and corrections. On entry the LCD will show T3
and then indicate the position to which the pointer should be positioned to adjust for
pointer offset.
Momentary presses of Key 1 will rotate the pointer clockwise to align with the major
graduations.
Should there be any misalignment repeatedly press Key 3 for anti-clockwise or
Key 4 for clockwise adjustment until correct alignment is obtained on all major
graduations.
On completion of correction adjustments press K1 and K2 together momentarily to
exit self-test stage 3.
The unit will display t4 for 1 second and then P for pass.
To exit self-test and store pointer corrections press Key 1 and Key 2 together for
2 seconds.
If storage of pointer corrections is not required press Key 1 and Key 2 together
momentarily to exit.