Manual for 6236B and 6237B

Brand: HP

Category: Power Supply

Document Type: Manual

Language: EN

Uploaded: Nov. 21, 2025, 8:42 p.m.

Manual Publish Date: 1977-02-01

The HP 6236B and 6237B are triple output DC power supplies designed for powering developmental IC circuits. They offer two ±20V tracking outputs and one additional single output (0 to +6V for 6236B, 0 to +18V for 6237B). All outputs are protected against overload and short-circuit damage. Controls for voltage and tracking ratio are located on the front panel, along with a voltmeter and ammeter. The supplies can be converted between line voltage options. They are suitable for bench operation or rack mounting.

Troubleshooting and error codes

STEP	ACTION	RESPONSE	NEXT ACTION
1	Check output voltage of + 20V supply.	a. Normal	a. Proceed to step (2).
		b. Zero volts	b. Check ac line fuse (F1). If blown, proceed to paragraph 5-38. If not blown, check bias and reference voltages (Table 5-4).
		c. Output voltage lower or higher than rating.	c. Check bias and reference voltages (Table 5-4).
2	Check output voltage of -20V supply in fixed tracking ratio mode.	a. Normal	a. If + 20V and -20V outputs are both normal with no load, a supply might be current limiting under load. To check this adjustment see paragraph 5-16, steps (I) thru (p).
		b. High, low, or zero output voltage.	b. Proceed to -20V supply troubleshooting, Table 5-6.
3	Check output of + 6V supply (Model 6236B) or + 18V supply (Model 6237B).	a. Normal	a. If the output of this supply is normal unloaded but its voltage falls when loaded, check the current limit adjustment, paragraph 5-16, steps (q) thru (t).
		b. High, low, or zero output voltage.	b. Proceed to Table 5-7.